[JS IR] Implement stepping tests for Kotlin/JS

We already have stepping tests for Kotlin/JVM. They are helpful for testing the correctness of the generated debugging information. They are better than line number tests in that they allow to test the _behavior_, not the generated data. The structure of the data may change even if the behavior stays the same. For that reason, stepping tests are more stable.
2022-05-19 20:34:11 +03:00
parent 003f846723
commit ea556ce428
34 changed files with 2448 additions and 62 deletions
@@ -18,6 +18,13 @@
            </array>
          </value>
        </entry>
+        <entry key="$PROJECT_DIR$/compiler/testData/debug">
+          <value>
+            <array>
+              <option value="$PROJECT_DIR$/js/js.tests/build/{out,out-min,out-per-module,out-per-module-min}/debug/$TEST_DATA_FILE$_v5.js" />
+            </array>
+          </value>
+        </entry>
        <entry key="$PROJECT_DIR$/js/js.translator/testData/box">
          <value>
            <array>
@@ -155,7 +155,9 @@ fun Project.configureKotlinCompilationOptions() {
            // Requires serialization plugin
            ":wasm:wasm.ir",
            // Uses multiplatform
-            ":kotlin-stdlib-jvm-minimal-for-test"
+            ":kotlin-stdlib-jvm-minimal-for-test",
+            // Requires serialization plugin
+            ":js:js.tests",
        )

        // TODO: fix remaining warnings and remove this property.
@@ -319,6 +319,12 @@ public class FirSteppingTestGenerated extends AbstractFirSteppingTest {
        runTest("compiler/testData/debug/stepping/localProperty.kt");
    }

+    @Test
+    @TestMetadata("multiModule.kt")
+    public void testMultiModule() throws Exception {
+        runTest("compiler/testData/debug/stepping/multiModule.kt");
+    }
+
    @Test
    @TestMetadata("multilineExpression.kt")
    public void testMultilineExpression() throws Exception {
@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JS_IR
 // FILE: test.kt

 public val MASSERTIONS_ENABLED: Boolean = true
@@ -30,17 +31,17 @@ fun box(): String {
 }

 // EXPECTATIONS
-// test.kt:24 box
-// test.kt:15 box
-// test.kt:16 box
-// test.kt:3 getMASSERTIONS_ENABLED
+// test.kt:25 box
 // test.kt:16 box
 // test.kt:17 box
-// test.kt:21 box
-// test.kt:25 box
-// test.kt:6 box
-// test.kt:3 getMASSERTIONS_ENABLED
-// test.kt:6 box
+// test.kt:4 getMASSERTIONS_ENABLED
+// test.kt:17 box
+// test.kt:18 box
+// test.kt:22 box
+// test.kt:26 box
 // test.kt:7 box
-// test.kt:12 box
-// test.kt:29 box
+// test.kt:4 getMASSERTIONS_ENABLED
+// test.kt:7 box
+// test.kt:8 box
+// test.kt:13 box
+// test.kt:30 box
@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JS_IR
 // FILE: test.kt

 fun box() {
@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JS_IR
 // FILE: test.kt
 fun box(): Int {
    if (
@@ -14,11 +15,11 @@ inline fun getB(): Int {
 }

 // EXPECTATIONS
-// test.kt:4 box
-// test.kt:13 box
 // test.kt:5 box
-// test.kt:10 getA
-// test.kt:5 box
-// test.kt:7 box
-// test.kt:13 box
-// test.kt:7 box
+// test.kt:14 box
+// test.kt:6 box
+// test.kt:11 getA
+// test.kt:6 box
+// test.kt:8 box
+// test.kt:14 box
+// test.kt:8 box
@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JS_IR
 // FILE: test.kt

 fun box() {
@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JS_IR
 // FILE: test.kt

 inline fun inlineFun(s: () -> Unit) {
@@ -1,4 +1,4 @@
-
+// IGNORE_BACKEND: JS_IR
 // FILE: test.kt
 inline fun foo(stringMaker: () -> String = { "OK" }): String {
    return stringMaker()
@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JS_IR
 // FILE: test.kt

 fun box() {
@@ -12,11 +13,11 @@ inline fun lookAtMe(f: (String) -> Unit) {
 }

 // EXPECTATIONS
-// test.kt:4 box
-// test.kt:10 box
-// test.kt:11 box
 // test.kt:5 box
-// test.kt:6 box
 // test.kt:11 box
 // test.kt:12 box
-// test.kt:7 box
+// test.kt:6 box
+// test.kt:7 box
+// test.kt:12 box
+// test.kt:13 box
+// test.kt:8 box
@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JS_IR
 // FILE: test.kt

 fun box() {
@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JS_IR
 // FILE: test.kt

 fun box() {
@@ -9,17 +10,17 @@ fun box() {
 }

 // EXPECTATIONS
-// test.kt:4 box
-// EXPECTATIONS JVM
 // test.kt:5 box
-// EXPECTATIONS
-// test.kt:6 box
-// test.kt:7 box
 // EXPECTATIONS JVM
-// test.kt:5 invoke
-// EXPECTATIONS JVM_IR
-// test.kt:5 box$bar
+// test.kt:6 box
 // EXPECTATIONS
 // test.kt:7 box
 // test.kt:8 box
-// test.kt:9 box
+// EXPECTATIONS JVM
+// test.kt:6 invoke
+// EXPECTATIONS JVM_IR
+// test.kt:6 box$bar
+// EXPECTATIONS
+// test.kt:8 box
+// test.kt:9 box
+// test.kt:10 box
@@ -0,0 +1,25 @@
+// MODULE: lib
+// FILE: a.kt
+
+fun a() = "a"
+
+// FILE: b.kt
+
+fun b() = "b"
+
+// MODULE: main(lib)
+// FILE: test.kt
+
+fun box() {
+    a()
+    b()
+}
+
+// EXPECTATIONS
+// test.kt:14 box
+// a.kt:4 a
+// test.kt:14 box
+// test.kt:15 box
+// b.kt:8 b
+// test.kt:15 box
+// test.kt:16 box
@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JS_IR
 // FILE: test.kt

 fun box() {
@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JS_IR
 // FILE: test.kt

 inline fun ifoo(ok: String = "OK"): String {
@@ -15,11 +16,11 @@ fun box(): String {

 // FORCE_STEP_INTO
 // EXPECTATIONS
-// test.kt:12 box
-// test.kt:3 box
-// test.kt:4 box
 // test.kt:13 box
-// test.kt:7 ifoo2$default (synthetic)
-// test.kt:8 ifoo2
-// test.kt:7 ifoo2$default (synthetic)
-// test.kt:13 box
+// test.kt:4 box
+// test.kt:5 box
+// test.kt:14 box
+// test.kt:8 ifoo2$default (synthetic)
+// test.kt:9 ifoo2
+// test.kt:8 ifoo2$default (synthetic)
+// test.kt:14 box
@@ -1,3 +1,5 @@
+// IGNORE_BACKEND: JS_IR
+
 // FILE: test.kt

 inline fun inlineFun(s: () -> Unit) {
@@ -11,10 +13,10 @@ fun box() {
 }

 // EXPECTATIONS
-// test.kt:8 box
-// test.kt:4 box
-// test.kt:9 box
 // test.kt:10 box
-// test.kt:4 box
-// test.kt:5 box
+// test.kt:6 box
 // test.kt:11 box
+// test.kt:12 box
+// test.kt:6 box
+// test.kt:7 box
+// test.kt:13 box
@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JS_IR
 // WITH_STDLIB
 // FILE: test.kt
 suspend fun foo(block: suspend Long.() -> String): String {
@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JS_IR
 // FILE: test.kt

 fun foo() {
@@ -89,4 +90,4 @@ fun box() {
 // test.kt:18 foo
 // test.kt:12 foo
 // test.kt:19 foo
-// test.kt:38 box
+// test.kt:38 box
@@ -319,6 +319,12 @@ public class IrSteppingTestGenerated extends AbstractIrSteppingTest {
        runTest("compiler/testData/debug/stepping/localProperty.kt");
    }

+    @Test
+    @TestMetadata("multiModule.kt")
+    public void testMultiModule() throws Exception {
+        runTest("compiler/testData/debug/stepping/multiModule.kt");
+    }
+
    @Test
    @TestMetadata("multilineExpression.kt")
    public void testMultilineExpression() throws Exception {
@@ -319,6 +319,12 @@ public class SteppingTestGenerated extends AbstractSteppingTest {
        runTest("compiler/testData/debug/stepping/localProperty.kt");
    }

+    @Test
+    @TestMetadata("multiModule.kt")
+    public void testMultiModule() throws Exception {
+        runTest("compiler/testData/debug/stepping/multiModule.kt");
+    }
+
    @Test
    @TestMetadata("multilineExpression.kt")
    public void testMultilineExpression() throws Exception {
@@ -3298,6 +3298,11 @@
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         </artifact>
      </component>
+      <component group="io.ktor" name="ktor-client-cio" version="2.0.2">
+         <artifact name="ktor-client-cio-metadata-2.0.2-all.jar">
+            <sha256 value="7edefe01e89d1d828788ffabf140f26943ecc6838770fc03fd67d3347110ff6a" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
      <component group="io.ktor" name="ktor-client-cio-jvm" version="1.4.0">
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@@ -3308,6 +3313,11 @@
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+      <component group="io.ktor" name="ktor-client-cio-jvm" version="2.0.2">
+         <artifact name="ktor-client-cio-jvm-2.0.2.jar">
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+      </component>
      <component group="io.ktor" name="ktor-client-cio-metadata" version="1.4.0">
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@@ -3344,6 +3354,11 @@
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+      <component group="io.ktor" name="ktor-client-core" version="2.0.2">
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+      </component>
      <component group="io.ktor" name="ktor-client-core-jvm" version="1.1.5">
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@@ -3376,6 +3391,11 @@
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+      <component group="io.ktor" name="ktor-client-core-jvm" version="2.0.2">
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+            <sha256 value="24e2b06aa74fcedae41cb0a18396df85bffda632369456053ea04dcab9ac1395" origin="Generated by Gradle"/>
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+      </component>
      <component group="io.ktor" name="ktor-client-core-metadata" version="1.4.0">
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@@ -3414,6 +3434,26 @@
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+      <component group="io.ktor" name="ktor-client-websockets" version="2.0.2">
+         <artifact name="ktor-client-websockets-metadata-2.0.2-all.jar">
+            <sha256 value="fa3a37277aeb4fcc705c174185550b80910a0734727781507a27ac6ac7d6ddf4" origin="Generated by Gradle"/>
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+      </component>
+      <component group="io.ktor" name="ktor-client-websockets-jvm" version="2.0.2">
+         <artifact name="ktor-client-websockets-jvm-2.0.2.jar">
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+      </component>
+      <component group="io.ktor" name="ktor-events" version="2.0.2">
+         <artifact name="ktor-events-metadata-2.0.2-all.jar">
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+      <component group="io.ktor" name="ktor-events-jvm" version="2.0.2">
+         <artifact name="ktor-events-jvm-2.0.2.jar">
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      <component group="io.ktor" name="ktor-http" version="1.2.1">
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@@ -3436,6 +3476,11 @@
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+      <component group="io.ktor" name="ktor-http" version="2.0.2">
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+      </component>
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@@ -3458,6 +3503,11 @@
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+      <component group="io.ktor" name="ktor-http-cio" version="2.0.2">
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+      </component>
      <component group="io.ktor" name="ktor-http-cio-jvm" version="1.2.1">
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+      <component group="io.ktor" name="ktor-http-cio-jvm" version="2.0.2">
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+      </component>
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@@ -3530,6 +3585,11 @@
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+      <component group="io.ktor" name="ktor-http-jvm" version="2.0.2">
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+      </component>
      <component group="io.ktor" name="ktor-http-metadata" version="1.4.0">
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+      <component group="io.ktor" name="ktor-io" version="2.0.2">
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+      <component group="io.ktor" name="ktor-io-jvm" version="2.0.2">
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+      <component group="io.ktor" name="ktor-network-jvm" version="2.0.2">
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+      <component group="io.ktor" name="ktor-network-tls" version="2.0.2">
+         <artifact name="ktor-network-tls-metadata-2.0.2-all.jar">
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+      <component group="io.ktor" name="ktor-network-tls-jvm" version="2.0.2">
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+      <component group="io.ktor" name="ktor-serialization" version="2.0.2">
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+      <component group="io.ktor" name="ktor-serialization-jvm" version="2.0.2">
+         <artifact name="ktor-serialization-jvm-2.0.2.jar">
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+         </artifact>
+      </component>
      <component group="io.ktor" name="ktor-server-core" version="1.6.7">
         <artifact name="ktor-server-core-jvm-1.6.7.jar">
            <md5 value="37d6440181540fce0bcf1595bee266e3" origin="Generated by Gradle"/>
@@ -3774,6 +3874,11 @@
            <sha256 value="7e401d9327a631e0d85dfdc1a123d57a26998bfb8aa1fe132b53ba0211518b6c" origin="Generated by Gradle"/>
         </artifact>
      </component>
+      <component group="io.ktor" name="ktor-utils" version="2.0.2">
+         <artifact name="ktor-utils-metadata-2.0.2-all.jar">
+            <sha256 value="0fd1f674dd2ebd157c4d0ecf0848868f1e9f4482a23d088cb30f97f3bec33cdc" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
      <component group="io.ktor" name="ktor-utils-jvm" version="1.0.1">
         <artifact name="ktor-utils-jvm-1.0.1.jar">
            <md5 value="0e7ec05f9dee3341e2584ce033c27fb9" origin="Generated by Gradle"/>
@@ -3816,6 +3921,11 @@
            <sha256 value="c037d1cb3064cd5d5cdb00fd388aa4b4dd0f4cf4f25e5cd9b0559c3f8043143c" origin="Generated by Gradle"/>
         </artifact>
      </component>
+      <component group="io.ktor" name="ktor-utils-jvm" version="2.0.2">
+         <artifact name="ktor-utils-jvm-2.0.2.jar">
+            <sha256 value="bea04d78ace03ef097636fbe615d5f6d35e216a344b3eaf9dcc2ab9ae7d44bff" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
      <component group="io.ktor" name="ktor-utils-metadata" version="1.4.0">
         <artifact name="ktor-utils-metadata-1.4.0-all.jar">
            <md5 value="55510e4e81261fa0fc1c8911aeab3cbd" origin="Generated by Gradle"/>
@@ -3830,12 +3940,32 @@
            <sha256 value="addb052400bea983d75b391a219a5802c9536f722acf61e2065b0a0a0f06a8e1" origin="Generated by Gradle"/>
         </artifact>
      </component>
+      <component group="io.ktor" name="ktor-websocket-serialization" version="2.0.2">
+         <artifact name="ktor-websocket-serialization-metadata-2.0.2-all.jar">
+            <sha256 value="bce2ba9c99337e7aa0771180210fcdce5e3a44a755b08904eaaf86afc92915d4" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
+      <component group="io.ktor" name="ktor-websocket-serialization-jvm" version="2.0.2">
+         <artifact name="ktor-websocket-serialization-jvm-2.0.2.jar">
+            <sha256 value="ad9173b667de4477a6c2d5b17b158a14b9ee3028217ba903b4c90c91fb68a44a" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
      <component group="io.ktor" name="ktor-websockets" version="1.1.5">
         <artifact name="ktor-websockets-1.1.5.jar">
            <md5 value="eca3d7a4077aea9f9a1eecf283c9526b" origin="Generated by Gradle"/>
            <sha256 value="8c0a0f7fd09eb27edf53d909ffcb7348ffbf896b3de4f09a273ece29e37b214b" origin="Generated by Gradle"/>
         </artifact>
      </component>
+      <component group="io.ktor" name="ktor-websockets" version="2.0.2">
+         <artifact name="ktor-websockets-metadata-2.0.2-all.jar">
+            <sha256 value="8bbfa120ec9b14d433c880dd4d2422aa4ec2857afe7b839f12787ae1b2cc0782" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
+      <component group="io.ktor" name="ktor-websockets-jvm" version="2.0.2">
+         <artifact name="ktor-websockets-jvm-2.0.2.jar">
+            <sha256 value="a652dbb425230bcb0f5c6b706e55a0c61c7e4bc7bd780132e6b42356a16a2f73" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
      <component group="io.netty" name="netty-buffer" version="4.1.52.Final">
         <artifact name="netty-buffer-4.1.52.Final.jar">
            <md5 value="adefee7023c7df6aa3ce1c991be1cc81" origin="Generated by Gradle"/>
@@ -7797,6 +7927,11 @@
            <sha256 value="540250c45b0c88bcd139d537924bfba138f50932503a3aa333e81a9c07a2527b" origin="Generated by Gradle"/>
         </artifact>
      </component>
+      <component group="org.jetbrains.kotlinx" name="kotlinx-coroutines-core" version="1.6.1">
+         <artifact name="kotlinx-coroutines-core-metadata-1.6.1-all.jar">
+            <sha256 value="67c807c236e19c32020fc5ba82b273fda1e76cad50693f0917efe6071f159db9" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
      <component group="org.jetbrains.kotlinx" name="kotlinx-coroutines-core-common" version="1.2.0">
         <artifact name="kotlinx-coroutines-core-common-1.2.0.jar">
            <md5 value="1dee15621c2e202dca85e5edebbba876" origin="Generated by Gradle"/>
@@ -7841,6 +7976,11 @@
            <sha256 value="db754be65cd22e18c8861a141cc35cedc3b659292eacb7f9d2c78a5386795dec" origin="Generated by Gradle"/>
         </artifact>
      </component>
+      <component group="org.jetbrains.kotlinx" name="kotlinx-coroutines-core-jvm" version="1.6.1">
+         <artifact name="kotlinx-coroutines-core-jvm-1.6.1.jar">
+            <sha256 value="3a93ffd052844643c0fef950ae5578db47cccbe9e7176d681333182e232bb0f1" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
      <component group="org.jetbrains.kotlinx" name="kotlinx-coroutines-core-metadata" version="1.3.8-native-mt-1.4.0-rc">
         <artifact name="kotlinx-coroutines-core-metadata-1.3.8-native-mt-1.4.0-rc-all.jar">
            <md5 value="f3a7316b16f20ad0440625e9fb301c34" origin="Generated by Gradle"/>
@@ -7939,6 +8079,16 @@
            <sha256 value="b1b5cfe4e59df8d21f98dee1449214e23ea7617cbfbd77099475762e186bf6a2" origin="Generated by Gradle"/>
         </artifact>
      </component>
+      <component group="org.jetbrains.kotlinx" name="kotlinx-coroutines-jdk8" version="1.6.1">
+         <artifact name="kotlinx-coroutines-jdk8-1.6.1.jar">
+            <sha256 value="634aad3c33567570c9bae7fefdadf3da1be57e050103d77d727f3bdb804c1f26" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
+      <component group="org.jetbrains.kotlinx" name="kotlinx-coroutines-slf4j" version="1.6.1">
+         <artifact name="kotlinx-coroutines-slf4j-1.6.1.jar">
+            <sha256 value="1ed76fd7117c2e06b5c842343ab70c507fde1de8a328a81891e9a51ebf306652" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
      <component group="org.jetbrains.kotlinx" name="kotlinx-datetime-jvm" version="0.3.1">
         <artifact name="kotlinx-datetime-jvm-0.3.1.jar">
            <md5 value="7fe856499ef7fcc60f4db75ccc753619" origin="Generated by Gradle"/>
@@ -8093,6 +8243,11 @@
            <sha256 value="1aa4d3fc53000f8b2885c0c681d90d183b909e4db995a92b7dc0da30c0e085b4" origin="Generated by Gradle"/>
         </artifact>
      </component>
+      <component group="org.jetbrains.kotlinx" name="kotlinx-serialization-core" version="1.3.3">
+         <artifact name="kotlinx-serialization-core-metadata-1.3.3-all.jar">
+            <sha256 value="abc222435fa7a892eda76a4a1623ad19792bf5c965426b630c38fb7fdf8a630d" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
      <component group="org.jetbrains.kotlinx" name="kotlinx-serialization-core-jvm" version="1.0.0">
         <artifact name="kotlinx-serialization-core-jvm-1.0.0.jar">
            <md5 value="008b4a519c55ce7534359e19f099c274" origin="Generated by Gradle"/>
@@ -8133,6 +8288,11 @@
            <sha256 value="5f220e8bef2b49febc2fd26357d846c7119c87f745491fbe3ab2159455c789bf" origin="Generated by Gradle"/>
         </artifact>
      </component>
+      <component group="org.jetbrains.kotlinx" name="kotlinx-serialization-core-jvm" version="1.3.3">
+         <artifact name="kotlinx-serialization-core-jvm-1.3.3.jar">
+            <sha256 value="7ef62d1a0114052608d0f541c17b25f1faac17a270d5e26217ac4329ea164752" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
      <component group="org.jetbrains.kotlinx" name="kotlinx-serialization-core-metadata" version="1.0.0">
         <artifact name="kotlinx-serialization-core-metadata-1.0.0-all.jar">
            <md5 value="3346a313a80ee63d222a5d2ba6f2b342" origin="Generated by Gradle"/>
@@ -8191,6 +8351,11 @@
            <sha256 value="ec5c5b8be44b08ef62462782863f1fb3b1c6f86990afe07610ab5d6079ef4970" origin="Generated by Gradle"/>
         </artifact>
      </component>
+      <component group="org.jetbrains.kotlinx" name="kotlinx-serialization-json" version="1.3.3">
+         <artifact name="kotlinx-serialization-json-metadata-1.3.3-all.jar">
+            <sha256 value="ec642685d370f3aff4ae3efb8e441296d90db9f28b688d9ed888b25db760b844" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
      <component group="org.jetbrains.kotlinx" name="kotlinx-serialization-json-jvm" version="1.0.0">
         <artifact name="kotlinx-serialization-json-jvm-1.0.0.jar">
            <md5 value="a7a87f36305c8bef0b5225fd3ca6bccf" origin="Generated by Gradle"/>
@@ -8217,6 +8382,11 @@
            <sha256 value="57b22b0342a639eebaa63308e0cb72d59ffffcbc9f63d324cb0733b8782a020b" origin="Generated by Gradle"/>
         </artifact>
      </component>
+      <component group="org.jetbrains.kotlinx" name="kotlinx-serialization-json-jvm" version="1.3.3">
+         <artifact name="kotlinx-serialization-json-jvm-1.3.3.jar">
+            <sha256 value="2a0dd7c162c3cc6d713610b81d809bd5976a140dc9efb1eb7152caf093509965" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
      <component group="org.jetbrains.kotlinx" name="kotlinx-serialization-json-metadata" version="1.0.0">
         <artifact name="kotlinx-serialization-json-metadata-1.0.0-all.jar">
            <md5 value="5927717cf9292fde25f735dbbc18af5a" origin="Generated by Gradle"/>
@@ -43,14 +43,18 @@ versions.kotlinx-collections-immutable=0.3.1
 versions.kotlinx-coroutines-core-jvm=1.5.0
 versions.kotlinx-coroutines-core=1.5.0
 versions.kotlinx-metadata-jvm=0.5.0
+versions.kotlinx-serialization-json=1.3.3
 versions.ktor-network=1.0.1
 versions.ktor-server-test-host=1.1.5
 versions.ktor-server-core=1.6.7
 versions.ktor-server-netty=1.6.7
 versions.ktor-client-mock=1.6.7
+versions.ktor-client-core=2.0.2
+versions.ktor-client-cio=2.0.2
+versions.ktor-client-websockets=2.0.2
 versions.native-platform=0.14
 versions.protobuf=2.6.1
 versions.r8=2.2.64
 versions.robolectric=4.0
 versions.nodejs=16.14.2
-versions.v8=10.2.9
+versions.v8=10.2.9
@@ -21,6 +21,9 @@ import java.io.*
 class SourceMap(val sourceContentResolver: (String) -> Reader?) {
    val groups = mutableListOf<SourceMapGroup>()

+    @Suppress("UNUSED") // For use in the debugger
+    fun debugToString() = ByteArrayOutputStream().also { debug(PrintStream(it)) }.toString()
+
    fun debug(writer: PrintStream = System.out) {
        for ((index, group) in groups.withIndex()) {
            writer.print("${index + 1}:")
@@ -8,6 +8,7 @@ import org.jetbrains.kotlin.ideaExt.idea

 plugins {
    kotlin("jvm")
+    kotlin("plugin.serialization")
    id("jps-compatible")
    id("com.github.node-gradle.node") version "3.2.1"
    id("de.undercouch.download")
@@ -78,6 +79,11 @@ dependencies {
    antLauncherJar(toolsJar())

    testRuntimeOnly("org.junit.vintage:junit-vintage-engine:${commonDependencyVersion("org.junit", "junit-bom")}")
+
+    testImplementation(commonDependency("org.jetbrains.kotlinx", "kotlinx-serialization-json"))
+    testImplementation(commonDependency("io.ktor", "ktor-client-core"))
+    testImplementation(commonDependency("io.ktor", "ktor-client-cio"))
+    testImplementation(commonDependency("io.ktor", "ktor-client-websockets"))
 }

 val generationRoot = projectDir.resolve("tests-gen")
@@ -177,6 +183,18 @@ val generateTypeScriptTests = sequential(
        .map { generateTypeScriptTestFor(it.name) }
 )

+fun Test.setupNodeJs() {
+    systemProperty("javascript.engine.path.NodeJs", com.github.gradle.node.variant.VariantComputer()
+        .let { variantComputer ->
+            variantComputer
+                .computeNodeDir(node)
+                .let { variantComputer.computeNodeBinDir(it) }
+                .let { variantComputer.computeNodeExec(node, it) }
+                .get()
+        }
+    )
+}
+
 fun Test.setupSpiderMonkey() {
    dependsOn(unzipJsShell)
    val jsShellExecutablePath = File(unzipJsShell.get().destinationDir, "js").absolutePath
@@ -195,6 +213,8 @@ fun Test.setupV8() {

 fun Test.setUpJsBoxTests(jsEnabled: Boolean, jsIrEnabled: Boolean) {
    setupV8()
+    if (jsIrEnabled)
+        setupNodeJs()

    inputs.files(rootDir.resolve("js/js.engines/src/org/jetbrains/kotlin/js/engine/repl.js"))

@@ -149,6 +149,10 @@ fun main(args: Array<String>) {
                model("codegen/boxWasmJsInterop")
            }

+            testClass<AbstractIrJsSteppingTest> {
+                model("debug/stepping")
+            }
+
            testClass<AbstractFir2IrJsTextTest>(
                suiteTestClassName = "Fir2IrJsTextTestGenerated"
            ) {
@@ -41,6 +41,18 @@ abstract class AbstractJsBlackBoxCodegenTestBase<R : ResultingArtifact.FrontendO
    abstract val recompileFacade: Constructor<AbstractTestFacade<BinaryArtifacts.Js, BinaryArtifacts.Js>>

    override fun TestConfigurationBuilder.configuration() {
+        commonConfigurationForJsBlackBoxCodegenTest()
+        jsArtifactsHandlersStep {
+            useHandlers(
+                ::NodeJsGeneratorHandler,
+                ::JsBoxRunner,
+                ::JsMinifierRunner,
+                ::JsAstHandler
+            )
+        }
+    }
+
+    protected fun TestConfigurationBuilder.commonConfigurationForJsBlackBoxCodegenTest() {
        globalDefaults {
            frontend = targetFrontend
            targetPlatform = JsPlatforms.defaultJsPlatform
@@ -100,13 +112,7 @@ abstract class AbstractJsBlackBoxCodegenTestBase<R : ResultingArtifact.FrontendO
        afterBackendFacade?.let { facadeStep(it) }
        facadeStep(recompileFacade)
        jsArtifactsHandlersStep {
-            useHandlers(
-                ::NodeJsGeneratorHandler,
-                ::JsBoxRunner,
-                ::JsMinifierRunner,
-                ::JsAstHandler,
-                ::JsSourceMapPathRewriter
-            )
+            useHandlers(::JsSourceMapPathRewriter)
        }
    }
 }
@@ -0,0 +1,987 @@
+/*
+ * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.js.test.debugger
+
+import kotlinx.serialization.*
+import kotlinx.serialization.json.*
+
+/**
+ * Represents an incoming [Chrome DevTools protocol](https://chromedevtools.github.io/devtools-protocol/) message,
+ * which can be:
+ * - an event
+ * - an method invocation result
+ * - an error, if a method invocation failed.
+ */
+sealed class CDPResponse {
+
+    /**
+     * Indicates that a CDP method was invoked successfully.
+     *
+     * [id] is a message id with which the method was invoked, [result] is the result of the invocation.
+     */
+    class MethodInvocationResult(val id: Int, val result: CDPMethodInvocationResult) : CDPResponse()
+
+    /**
+     * Indicates that a CDP method invocation failed.
+     *
+     * [id] is a message id with which the method was invoked, [error] is the failure information.
+     */
+    class Error(val id: Int, val error: CDPError) : CDPResponse()
+
+    /**
+     * Indicates an event received from CDP. Events are not tied to any method invocations.
+     */
+    class Event(val event: CDPEvent) : CDPResponse()
+}
+
+private val json = Json {
+    ignoreUnknownKeys = true
+}
+
+/**
+ * Decodes an instance of [CDPResponse] from JSON-encoded [message].
+ *
+ * [serializerForMessageId] is used for retrieving additional information about how to decode the response for the given message id.
+ */
+fun decodeCDPResponse(
+    message: String,
+    serializerForMessageId: (Int) -> CDPMethodCallEncodingInfo
+): CDPResponse {
+    val jsonElement = json.parseToJsonElement(message)
+    return when (val id = jsonElement.jsonObject["id"]?.jsonPrimitive?.int) {
+        null -> CDPResponse.Event(decodeCDPEvent(jsonElement))
+        else -> {
+            val serializer = when (val encodingInfo = serializerForMessageId(id)) {
+                is CDPMethodCallEncodingInfoImpl -> encodingInfo.serializer
+                is CDPMethodCallEncodingInfoPlainText -> null
+            }
+            val result = jsonElement.jsonObject["result"]
+            val error = jsonElement.jsonObject["error"]
+            if (result != null) {
+                CDPResponse.MethodInvocationResult(
+                    id,
+                    serializer?.let { json.decodeFromJsonElement(it, result) } ?: CDPMethodInvocationResultPlainText(result.toString())
+                )
+            } else if (error != null) {
+                CDPResponse.Error(id, json.decodeFromJsonElement(error))
+            } else {
+                error("Missing 'result' or 'error' properties in JSON")
+            }
+        }
+    }
+}
+
+/**
+ * An opaque object that contains information about how to decode a method invocation result.
+ *
+ * Depending on the method, the type of the result may be different. So, when invoking a method,
+ * we save the information about how to decode its result, so that when the result is received,
+ * we could decode a value of the correct type.
+ */
+sealed interface CDPMethodCallEncodingInfo
+
+private class CDPMethodCallEncodingInfoImpl(
+    val serializer: DeserializationStrategy<out CDPMethodInvocationResult>
+) : CDPMethodCallEncodingInfo
+
+/**
+ * Indicates that the result of the method call does not need any deserialization.
+ */
+object CDPMethodCallEncodingInfoPlainText : CDPMethodCallEncodingInfo
+
+/**
+ * Returns the JSON message for invoking the method, as well as the information about how to decode its result.
+ */
+private inline fun <reified Response : CDPMethodInvocationResult, reified Params : CDPRequestParams> encodeCDPMethodCall(
+    messageId: Int,
+    methodName: String,
+    params: Params?
+): Pair<String, CDPMethodCallEncodingInfo> {
+    val request = CDPRequest(messageId, methodName, params)
+    return json.encodeToString(request) to
+            CDPMethodCallEncodingInfoImpl(json.serializersModule.serializer<Response>())
+}
+
+/**
+ * A superclass for each kind of CDP method invocation result.
+ */
+@Serializable
+sealed class CDPMethodInvocationResult
+
+/**
+ * A special kind of method invocation result that indicates that the response contents should be discarded.
+ */
+@Serializable
+object CDPMethodInvocationResultUnit : CDPMethodInvocationResult()
+
+/**
+ * A special kind of method invocation result that indicates that the response contents should not be decoded from JSON,
+ * and instead should be returned as-is.
+ */
+class CDPMethodInvocationResultPlainText(val string: String) : CDPMethodInvocationResult()
+
+/**
+ * A superclass for each kind of CDP method invocation parameters.
+ */
+@Serializable
+sealed class CDPRequestParams
+
+/**
+ * A special kind of method invocation parameters that indicates that the method accepts no parameters.
+ */
+@Serializable
+internal object CDPRequestParamsUnit : CDPRequestParams()
+
+/**
+ * A representation of a [Chrome DevTools protocol](https://chromedevtools.github.io/devtools-protocol/) request.
+ */
+@Serializable
+class CDPRequest<Params : CDPRequestParams>(
+    val id: Int,
+    val method: String,
+    val params: Params? = null
+)
+
+/**
+ * A representation of a [Chrome DevTools protocol](https://chromedevtools.github.io/devtools-protocol/) error.
+ */
+@Serializable
+class CDPError private constructor(val code: Int, val message: String? = null)
+
+/**
+ * A superclass for each kind of CDP event.
+ */
+@Serializable
+sealed class CDPEvent
+
+/**
+ * When we encounter a CDP event whose name we don't know, we return an instance of this class.
+ */
+class UnknownCDPEvent(val name: String) : CDPEvent()
+
+private fun decodeCDPEvent(element: JsonElement): CDPEvent {
+    val method = element.jsonObject["method"]!!.jsonPrimitive.content
+    val params = element.jsonObject["params"] ?: error("missing params")
+    return when (method) {
+        "Debugger.breakpointResolved" -> json.decodeFromJsonElement(Debugger.Event.BreakpointResolved.serializer(), params)
+        "Debugger.paused" -> json.decodeFromJsonElement(Debugger.Event.Paused.serializer(), params)
+        "Debugger.resumed" -> json.decodeFromJsonElement(Debugger.Event.Resumed.serializer(), params)
+        "Debugger.scriptFailedToParse" -> json.decodeFromJsonElement(Debugger.Event.ScriptFailedToParse.serializer(), params)
+        "Debugger.scriptParsed" -> json.decodeFromJsonElement(Debugger.Event.ScriptParsed.serializer(), params)
+        "Runtime.executionContextCreated" -> json.decodeFromJsonElement(Runtime.Event.ExecutionContextCreated.serializer(), params)
+        "Runtime.executionContextDestroyed" -> json.decodeFromJsonElement(Runtime.Event.ExecutionContextDestroyed.serializer(), params)
+        else -> UnknownCDPEvent(method)
+    }
+}
+
+/**
+ * Something capable of invoking a [Chrome DevTools protocol](https://chromedevtools.github.io/devtools-protocol/) method and returning
+ * the result of the invocation.
+ */
+interface CDPRequestEvaluator {
+
+    /**
+     * @param encodeMethodCallWithMessageId passed a message id, expected to return the JSON-encoded CDP message
+     * and some information about how to decode the response.
+     */
+    suspend fun genericEvaluateRequest(
+        encodeMethodCallWithMessageId: (Int) -> Pair<String, CDPMethodCallEncodingInfo>
+    ): CDPMethodInvocationResult
+}
+
+private suspend inline fun <reified T : CDPMethodInvocationResult> CDPRequestEvaluator.evaluateRequest(
+    noinline body: (Int) -> Pair<String, CDPMethodCallEncodingInfo>
+) = genericEvaluateRequest(body) as T
+
+/**
+ * The [`Runtime` domain](https://chromedevtools.github.io/devtools-protocol/tot/Runtime/) of Chrome DevTools protocol.
+ */
+class Runtime(private val requestEvaluator: CDPRequestEvaluator) {
+
+    /**
+     * Enables reporting of execution contexts creation by means of [Runtime.Event.ExecutionContextCreated] event.
+     * When the reporting gets enabled the event will be sent immediately for each existing execution context.
+     *
+     * See [Runtime.enable](https://chromedevtools.github.io/devtools-protocol/tot/Runtime/#method-enable)
+     */
+    suspend fun enable() {
+        requestEvaluator.evaluateRequest<CDPMethodInvocationResultUnit> { messageId ->
+            encodeCDPMethodCall<CDPMethodInvocationResultUnit, CDPRequestParamsUnit>(messageId, "Runtime.enable", null)
+        }
+    }
+
+    /**
+     * Tells inspected instance to run if it was waiting for debugger to attach.
+     *
+     * See [Runtime.runIfWaitingForDebugger](https://chromedevtools.github.io/devtools-protocol/tot/Runtime/#method-runIfWaitingForDebugger)
+     */
+    suspend fun runIfWaitingForDebugger() {
+        requestEvaluator.evaluateRequest<CDPMethodInvocationResultUnit> { messageId ->
+            encodeCDPMethodCall<CDPMethodInvocationResultUnit, CDPRequestParamsUnit>(messageId, "Runtime.runIfWaitingForDebugger", null)
+        }
+    }
+
+    @Serializable
+    class EvaluationResult private constructor(
+        /**
+         * Evaluation result.
+         */
+        val result: RemoteObject,
+        /**
+         * Exception details.
+         */
+        val exceptionDetails: ExceptionDetails? = null
+    ) : CDPMethodInvocationResult()
+
+    @Serializable
+    class EvaluateRequestParams(val expression: String, val contextId: ExecutionContextId? = null) : CDPRequestParams()
+
+    /**
+     * Evaluates expression on global object.
+     *
+     * See [Runtime.evaluate](https://chromedevtools.github.io/devtools-protocol/tot/Runtime/#method-evaluate)
+     *
+     * @param expression Expression to evaluate.
+     * @param contextId Specifies in which execution context to perform evaluation.
+     * If the parameter is omitted the evaluation will be performed in the context of the inspected page.
+     */
+    suspend fun evaluate(expression: String, contextId: ExecutionContextId? = null) =
+        requestEvaluator.evaluateRequest<EvaluationResult> { messageId ->
+            encodeCDPMethodCall<EvaluationResult, EvaluateRequestParams>(
+                messageId,
+                "Runtime.evaluate",
+                EvaluateRequestParams(expression, contextId)
+            )
+        }
+
+    /**
+     * Unique script identifier.
+     *
+     * See [Runtime.ScriptId](https://chromedevtools.github.io/devtools-protocol/tot/Runtime/#type-ScriptId)
+     */
+    @Serializable
+    @JvmInline
+    value class ScriptId(val value: String)
+
+    /**
+     * Id of an execution context.
+     *
+     * See [Runtime.ExecutionContextId](https://chromedevtools.github.io/devtools-protocol/tot/Runtime/#type-ExecutionContextId)
+     */
+    @Serializable
+    @JvmInline
+    value class ExecutionContextId(val value: Int)
+
+    /**
+     * Unique object identifier.
+     *
+     * See [Runtime.RemoteObjectId](https://chromedevtools.github.io/devtools-protocol/tot/Runtime/#type-RemoteObjectId)
+     */
+    @Serializable
+    @JvmInline
+    value class RemoteObjectId(val value: String)
+
+    /**
+     * Object type.
+     */
+    @Serializable
+    enum class ValueType {
+        @SerialName("object")
+        OBJECT,
+
+        @SerialName("function")
+        FUNCTION,
+
+        @SerialName("undefined")
+        UNDEFINED,
+
+        @SerialName("string")
+        STRING,
+
+        @SerialName("number")
+        NUMBER,
+
+        @SerialName("boolean")
+        BOOLEAN,
+
+        @SerialName("symbol")
+        SYMBOL,
+
+        @SerialName("bigint")
+        BIGINT,
+    }
+
+    /**
+     * Object subtype hint.
+     */
+    @Serializable
+    enum class ObjectSubtype {
+        @SerialName("array")
+        ARRAY,
+
+        @SerialName("null")
+        NULL,
+
+        @SerialName("node")
+        NODE,
+
+        @SerialName("regexp")
+        REGEXP,
+
+        @SerialName("date")
+        DATE,
+
+        @SerialName("map")
+        MAP,
+
+        @SerialName("set")
+        SET,
+
+        @SerialName("weakmap")
+        WEAKMAP,
+
+        @SerialName("weakset")
+        WEAKSET,
+
+        @SerialName("iterator")
+        ITERATOR,
+
+        @SerialName("generator")
+        GENERATOR,
+
+        @SerialName("error")
+        ERROR,
+
+        @SerialName("proxy")
+        PROXY,
+
+        @SerialName("promise")
+        PROMISE,
+
+        @SerialName("typedarray")
+        TYPEDARRAY,
+
+        @SerialName("arraybuffer")
+        ARRAYBUFFER,
+
+        @SerialName("dataview")
+        DATAVIEW,
+
+        @SerialName("webassemblymemory")
+        WEBASSEMBLYMEMORY,
+
+        @SerialName("wasmvalue")
+        WASMVALUE
+    }
+
+    /**
+     * Mirror object referencing original JavaScript object.
+     *
+     * See [Runtime.RemoteObject](https://chromedevtools.github.io/devtools-protocol/tot/Runtime/#type-RemoteObject)
+     */
+    @Serializable
+    class RemoteObject private constructor(
+        /**
+         * Object type.
+         */
+        val type: ValueType,
+        /**
+         * Object subtype hint. Specified for [ValueType.OBJECT] type values only.
+         */
+        val subtype: ObjectSubtype? = null,
+        /**
+         * Object class (constructor) name. Specified for [ValueType.OBJECT] type values only.
+         */
+        val className: String? = null,
+        /**
+         * String representation of the object.
+         */
+        val description: String? = null,
+        /**
+         * Unique object identifier (for non-primitive values).
+         */
+        val objectId: RemoteObjectId? = null
+    )
+
+    /**
+     * Stack entry for runtime errors and assertions.
+     *
+     * See [Runtime.CallFrame](https://chromedevtools.github.io/devtools-protocol/tot/Runtime/#type-CallFrame)
+     */
+    @Serializable
+    class CallFrame private constructor(
+        /**
+         * JavaScript function name.
+         */
+        val functionName: String,
+        /**
+         * JavaScript script id.
+         */
+        val scriptId: ScriptId,
+        /**
+         * JavaScript script name or url.
+         */
+        val url: String,
+        /**
+         * JavaScript script line number (0-based).
+         */
+        val lineNumber: Int,
+        /**
+         * JavaScript script column number (0-based).
+         */
+        val columnNumber: Int
+    )
+
+    /**
+     * Call frames for assertions or error messages.
+     *
+     * See [Runtime.StackTrace](https://chromedevtools.github.io/devtools-protocol/tot/Runtime/#type-StackTrace)
+     */
+    @Serializable
+    class StackTrace private constructor(
+        /**
+         * String label of this stack trace. For async traces this may be a name of the function that initiated the async call.
+         */
+        val description: String? = null,
+        /**
+         * A list of call frames in the stack trace.
+         */
+        val callFrames: List<CallFrame>,
+
+        /**
+         * Asynchronous JavaScript stack trace that preceded this stack, if available.
+         */
+        val parent: StackTrace? = null
+    )
+
+    /**
+     * Detailed information about exception (or error) that was thrown during script compilation or execution.
+     *
+     * See [Runtime.ExceptionDetails](https://chromedevtools.github.io/devtools-protocol/tot/Runtime/#type-ExceptionDetails)
+     */
+    @Serializable
+    class ExceptionDetails private constructor(
+        /**
+         * Exception id.
+         */
+        val exceptionId: Int,
+        /**
+         * Exception text, which should be used together with exception object when available.
+         */
+        val text: String,
+        /**
+         * Line number of the exception location (0-based).
+         */
+        val lineNumber: Int,
+        /**
+         * Column number of the exception location (0-based).
+         */
+        val columnNumber: Int,
+        /**
+         * Script ID of the exception location.
+         */
+        val scriptId: ScriptId? = null,
+        /**
+         * URL of the exception location, to be used when the script was not reported.
+         */
+        val url: String? = null,
+        /**
+         * JavaScript stack trace if available.
+         */
+        val stackTrace: StackTrace? = null,
+        /**
+         * Exception object if available.
+         */
+        val exception: RemoteObject? = null,
+        /**
+         * Identifier of the context where exception happened.
+         */
+        val executionContextId: ExecutionContextId? = null,
+    )
+
+    /**
+     * Description of an isolated world.
+     *
+     * See [Runtime.ExecutionContextDescription](https://chromedevtools.github.io/devtools-protocol/tot/Runtime/#type-ExecutionContextDescription)
+     */
+    @Serializable
+    class ExecutionContextDescription(
+        /**
+         * Unique id of the execution context. It can be used to specify in which execution context script evaluation should be performed.
+         */
+        val id: ExecutionContextId,
+        /**
+         * Execution context origin.
+         */
+        val origin: String,
+        /**
+         * Human readable name describing given context.
+         */
+        val name: String,
+    )
+
+    /**
+     * An event in the `Runtime` CDP domain.
+     */
+    @Serializable
+    sealed class Event : CDPEvent() {
+        /**
+         * Issued when new execution context is created.
+         *
+         * See [Runtime.executionContextCreated](https://chromedevtools.github.io/devtools-protocol/tot/Runtime/#event-executionContextCreated)
+         */
+        @Serializable
+        class ExecutionContextCreated private constructor(
+            /**
+             * A newly created execution context.
+             */
+            val context: ExecutionContextDescription,
+        ) : Event()
+
+        /**
+         * Issued when execution context is destroyed.
+         *
+         * See [Runtime.executionContextDestroyed](https://chromedevtools.github.io/devtools-protocol/tot/Runtime/#event-executionContextDestroyed)
+         */
+        @Serializable
+        class ExecutionContextDestroyed private constructor(
+            /**
+             * Id of the destroyed context
+             */
+            val executionContextId: ExecutionContextId
+        ) : Event()
+    }
+}
+
+/**
+ * The [`Debugger` domain](https://chromedevtools.github.io/devtools-protocol/tot/Debugger/) of Chrome DevTools protocol.
+ */
+class Debugger(private val requestEvaluator: CDPRequestEvaluator) {
+
+    /**
+     * Enables the debugger.
+     *
+     * See [Debugger.enable](https://chromedevtools.github.io/devtools-protocol/tot/Debugger/#method-enable)
+     */
+    suspend fun enable() {
+        requestEvaluator.evaluateRequest<CDPMethodInvocationResultUnit> { messageId ->
+            encodeCDPMethodCall<CDPMethodInvocationResultUnit, CDPRequestParamsUnit>(messageId, "Debugger.enable", null)
+        }
+    }
+
+    @Serializable
+    class ResumeRequestParams private constructor(val terminateOnResume: Boolean = false) : CDPRequestParams()
+
+    /**
+     * Resumes JavaScript execution.
+     *
+     * See [Debugger.resume](https://chromedevtools.github.io/devtools-protocol/tot/Debugger/#method-resume)
+     */
+    suspend fun resume() {
+        requestEvaluator.evaluateRequest<CDPMethodInvocationResultUnit> { messageId ->
+            encodeCDPMethodCall<CDPMethodInvocationResultUnit, ResumeRequestParams>(messageId, "Debugger.resume", null)
+        }
+    }
+
+    @Serializable
+    class SetBreakpointByUrlResult private constructor(
+        /**
+         * Id of the created breakpoint for further reference.
+         */
+        val breakpointId: BreakpointId,
+
+        /**
+         * List of the locations this breakpoint resolved into upon addition.
+         */
+        val locations: List<Location>
+    ) : CDPMethodInvocationResult()
+
+    @Serializable
+    private class SetBreakpointByUrlRequestParams(
+        val lineNumber: Int,
+        val url: String,
+        val scriptHash: String? = null,
+        val columnNumber: Int? = null,
+        val condition: String? = null,
+    ) : CDPRequestParams()
+
+    /**
+     * Sets JavaScript breakpoint at given location specified either by URL or URL regex.
+     * Once this command is issued, all existing parsed scripts will have breakpoints resolved and returned in
+     * [SetBreakpointByUrlResult.locations] property.
+     * Further matching script parsing will result in subsequent [Debugger.Event.BreakpointResolved] events issued.
+     *
+     * See [Debugger.setBreakpointByUrl](https://chromedevtools.github.io/devtools-protocol/tot/Debugger/#method-setBreakpointByUrl)
+     *
+     * @param lineNumber Line number to set breakpoint at.
+     * @param url URL of the resources to set breakpoint on.
+     * @param scriptHash Script hash of the resources to set breakpoint on.
+     * @param columnNumber Offset in the line to set breakpoint at.
+     * @param condition Expression to use as a breakpoint condition.
+     * When specified, debugger will only stop on the breakpoint if this expression evaluates to true.
+     */
+    suspend fun setBreakpointByUrl(
+        lineNumber: Int,
+        url: String,
+        scriptHash: String? = null,
+        columnNumber: Int? = null,
+        condition: String? = null
+    ) = requestEvaluator.evaluateRequest<SetBreakpointByUrlResult> { messageId ->
+        encodeCDPMethodCall<SetBreakpointByUrlResult, SetBreakpointByUrlRequestParams>(
+            messageId,
+            "Debugger.setBreakpointByUrl",
+            SetBreakpointByUrlRequestParams(
+                lineNumber,
+                url,
+                scriptHash,
+                columnNumber,
+                condition
+            )
+        )
+    }
+
+    @Serializable
+    class SetBreakpointResult private constructor(
+        /**
+         * Id of the created breakpoint for further reference.
+         */
+        val breakpointId: BreakpointId,
+
+        /**
+         * Location this breakpoint resolved into.
+         */
+        val actualLocation: Location
+    ) : CDPMethodInvocationResult()
+
+    @Serializable
+    private class SetBreakpointRequestParams(
+        val location: Location,
+        val condition: String? = null,
+    ) : CDPRequestParams()
+
+    /**
+     * Sets JavaScript breakpoint at a given location.
+     *
+     * See [Debugger.setBreakpoint](https://chromedevtools.github.io/devtools-protocol/tot/Debugger/#method-setBreakpoint)
+     *
+     * @param scriptId Script identifier as reported in the [Debugger.Event.ScriptParsed].
+     * @param lineNumber Line number in the script (0-based).
+     * @param columnNumber Column number in the script (0-based).
+     * @param condition Expression to use as a breakpoint condition.
+     * When specified, debugger will only stop on the breakpoint if this expression evaluates to true.
+     */
+    suspend fun setBreakpoint(
+        scriptId: Runtime.ScriptId,
+        lineNumber: Int,
+        columnNumber: Int? = null,
+        condition: String? = null
+    ) = requestEvaluator.evaluateRequest<SetBreakpointResult> { messageId ->
+        encodeCDPMethodCall<SetBreakpointResult, SetBreakpointRequestParams>(
+            messageId,
+            "Debugger.setBreakpoint",
+            SetBreakpointRequestParams(Location(scriptId, lineNumber, columnNumber), condition)
+        )
+    }
+
+    @Serializable
+    private class SetSkipAllPausesRequestParams(val skip: Boolean) : CDPRequestParams()
+
+    /**
+     * Makes page not interrupt on any pauses (breakpoint, exception, dom exception etc).
+     *
+     * See [Debugger.setSkipAllPauses](https://chromedevtools.github.io/devtools-protocol/tot/Debugger/#method-setSkipAllPauses)
+     *
+     * @param skip New value for skip pauses state.
+     */
+    suspend fun setSkipAllPauses(skip: Boolean) {
+        requestEvaluator.evaluateRequest<CDPMethodInvocationResultUnit> { messageId ->
+            encodeCDPMethodCall<CDPMethodInvocationResultUnit, SetSkipAllPausesRequestParams>(
+                messageId,
+                "Debugger.setSkipAllPauses",
+                SetSkipAllPausesRequestParams(skip)
+            )
+        }
+    }
+
+    /**
+     * Steps into the function call.
+     *
+     * See [Debugger.stepInto](https://chromedevtools.github.io/devtools-protocol/tot/Debugger/#method-stepInto)
+     */
+    suspend fun stepInto() {
+        requestEvaluator.evaluateRequest<CDPMethodInvocationResultUnit> { messageId ->
+            encodeCDPMethodCall<CDPMethodInvocationResultUnit, CDPRequestParamsUnit>(messageId, "Debugger.stepInto", null)
+        }
+    }
+
+    @Serializable
+    private class EvaluateOnCallFrameRequestParams(val callFrameId: CallFrameId, val expression: String) : CDPRequestParams()
+
+    /**
+     * Evaluates expression on a given call frame.
+     *
+     * See [Debugger.evaluateOnCallFrame](https://chromedevtools.github.io/devtools-protocol/tot/Debugger/#method-evaluateOnCallFrame)
+     *
+     * @param callFrameId Call frame identifier to evaluate on.
+     * @param expression Expression to evaluate.
+     */
+    suspend fun evaluateOnCallFrame(callFrameId: CallFrameId, expression: String) =
+        requestEvaluator.evaluateRequest<Runtime.EvaluationResult> { messageId ->
+            encodeCDPMethodCall<Runtime.EvaluationResult, EvaluateOnCallFrameRequestParams>(
+                messageId,
+                "Debugger.evaluateOnCallFrame",
+                EvaluateOnCallFrameRequestParams(callFrameId, expression)
+            )
+        }
+
+    /**
+     * Breakpoint identifier.
+     *
+     * See [Debugger.BreakpointId](https://chromedevtools.github.io/devtools-protocol/tot/Debugger/#type-BreakpointId)
+     */
+    @Serializable
+    @JvmInline
+    value class BreakpointId(val value: String)
+
+    /**
+     * Location in the source code.
+     *
+     * See [Debugger.Location](https://chromedevtools.github.io/devtools-protocol/tot/Debugger/#type-Location)
+     */
+    @Serializable
+    class Location internal constructor(
+        /**
+         * Script identifier as reported in the [Debugger.Event.ScriptParsed].
+         */
+        val scriptId: Runtime.ScriptId,
+        /**
+         * Line number in the script (0-based).
+         */
+        val lineNumber: Int,
+        /**
+         * Column number in the script (0-based).
+         */
+        val columnNumber: Int? = null
+    )
+
+    /**
+     * Call frame identifier.
+     *
+     * See [Debugger.CallFrameId](https://chromedevtools.github.io/devtools-protocol/tot/Debugger/#type-CallFrameId)
+     */
+    @Serializable
+    @JvmInline
+    value class CallFrameId(val value: String)
+
+    /**
+     * JavaScript call frame. Array of call frames form the call stack.
+     *
+     * See [Debugger.CallFrame](https://chromedevtools.github.io/devtools-protocol/tot/Debugger/#type-CallFrame)
+     */
+    @Serializable
+    class CallFrame private constructor(
+        /**
+         * Call frame identifier. This identifier is only valid while the virtual machine is paused.
+         */
+        val callFrameId: CallFrameId,
+
+        /**
+         * Name of the JavaScript function called on this call frame.
+         */
+        val functionName: String,
+
+        /**
+         * Function location in the source code.
+         */
+        val functionLocation: Location? = null,
+
+        /**
+         * Location in the source code.
+         */
+        val location: Location,
+
+        /**
+         * `this` object for this call frame.
+         */
+        val `this`: Runtime.RemoteObject,
+
+        /**
+         * The value being returned, if the function is at return point.
+         */
+        val returnValue: Runtime.RemoteObject? = null,
+    )
+
+    @Serializable
+    enum class PauseReason {
+
+        @SerialName("ambiguous")
+        AMBIGUOUS,
+
+        @SerialName("assert")
+        ASSERT,
+
+        @SerialName("CSPViolation")
+        CSP_VIOLATION,
+
+        @SerialName("debugCommand")
+        DEBUG_COMMAND,
+
+        @SerialName("DOM")
+        DOM,
+
+        @SerialName("EventListener")
+        EVENT_LISTENER,
+
+        @SerialName("exception")
+        EXCEPTION,
+
+        @SerialName("instrumentation")
+        INSTRUMENTATION,
+
+        @SerialName("OOM")
+        OOM,
+
+        @SerialName("other")
+        OTHER,
+
+        @SerialName("promiseRejection")
+        PROMISE_REJECTION,
+
+        @SerialName("XHR")
+        XHR,
+
+        @SerialName("Break on start")
+        BREAK_ON_START,
+    }
+
+    /**
+     * An event in the `Debugger` CDP domain.
+     */
+    @Serializable
+    sealed class Event : CDPEvent() {
+
+        /**
+         * Fired when breakpoint is resolved to an actual script and location.
+         *
+         * See [Debugger.breakpointResolved](https://chromedevtools.github.io/devtools-protocol/tot/Debugger/#event-breakpointResolved)
+         */
+        @Serializable
+        class BreakpointResolved private constructor(
+            /**
+             * Breakpoint unique identifier.
+             */
+            val breakpointId: BreakpointId,
+            /**
+             * Actual breakpoint location.
+             */
+            val location: Location
+        ) : Event()
+
+        /**
+         * Fired when the virtual machine stopped on breakpoint or exception or any other stop criteria.
+         *
+         * See [Debugger.paused](https://chromedevtools.github.io/devtools-protocol/tot/Debugger/#event-paused)
+         */
+        @Serializable
+        class Paused private constructor(
+            /**
+             * Call stack the virtual machine stopped on.
+             */
+            val callFrames: List<CallFrame>,
+            /**
+             * Pause reason.
+             */
+            val reason: PauseReason,
+
+            /**
+             * Hit breakpoints IDs
+             */
+            val hitBreakpoints: List<BreakpointId> = emptyList()
+        ) : Event()
+
+        /**
+         * Fired when the virtual machine resumed execution.
+         *
+         * See [Debugger.resumed](https://chromedevtools.github.io/devtools-protocol/tot/Debugger/#event-resumed)
+         */
+        @Serializable
+        object Resumed : Event()
+
+        /**
+         * Fired when virtual machine fails to parse the script.
+         *
+         * See [Debugger.scriptFailedToParse](https://chromedevtools.github.io/devtools-protocol/tot/Debugger/#event-scriptFailedToParse)
+         */
+        @Serializable
+        class ScriptFailedToParse private constructor(
+            /**
+             * Identifier of the script parsed.
+             */
+            val scriptId: Runtime.ScriptId,
+            /**
+             * URL or name of the script parsed (if any).
+             */
+            val url: String,
+            /**
+             * Line offset of the script within the resource with given URL (for script tags).
+             */
+            val startLine: Int,
+            /**
+             * Column offset of the script within the resource with given URL.
+             */
+            val startColumn: Int,
+            /**
+             * Last line of the script.
+             */
+            val endLine: Int,
+            /**
+             * Length of the last line of the script.
+             */
+            val endColumn: Int,
+            /**
+             * URL of source map associated with script (if any).
+             */
+            val sourceMapUrl: String? = null,
+        ) : Event()
+
+        /**
+         * Fired when virtual machine parses script. This event is also fired for all known and uncollected scripts upon enabling debugger.
+         *
+         * See [Debugger.scriptParsed](https://chromedevtools.github.io/devtools-protocol/tot/Debugger/#event-scriptParsed)
+         */
+        @Serializable
+        class ScriptParsed private constructor(
+            /**
+             * Identifier of the script parsed.
+             */
+            val scriptId: Runtime.ScriptId,
+            /**
+             * URL or name of the script parsed (if any).
+             */
+            val url: String,
+            /**
+             * Line offset of the script within the resource with given URL (for script tags).
+             */
+            val startLine: Int,
+            /**
+             * Column offset of the script within the resource with given URL.
+             */
+            val startColumn: Int,
+            /**
+             * Last line of the script.
+             */
+            val endLine: Int,
+            /**
+             * Length of the last line of the script.
+             */
+            val endColumn: Int,
+            /**
+             * URL of source map associated with script (if any).
+             */
+            val sourceMapUrl: String? = null,
+        ) : Event()
+    }
+}
@@ -0,0 +1,218 @@
+/*
+ * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+package org.jetbrains.kotlin.js.test.debugger
+
+import io.ktor.client.*
+import io.ktor.client.engine.cio.*
+import io.ktor.client.plugins.websocket.*
+import io.ktor.websocket.*
+import kotlinx.coroutines.runBlocking
+import kotlinx.serialization.SerializationException
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
+import org.jetbrains.kotlin.utils.addToStdlib.cast
+import java.util.logging.Logger
+import kotlin.coroutines.*
+
+/**
+ * A client that fires up a Node.js instance in the inspector mode, and connects to it via websocket,
+ * allowing us to communicate with it using [Chrome DevTools protocol](https://chromedevtools.github.io/devtools-protocol/).
+ *
+ * @param scriptPath the script for Node to run.
+ * @param args the command line arguments passed to the script.
+ */
+class NodeJsInspectorClient(val scriptPath: String, val args: List<String>) {
+
+    private var onDebuggerEventCallback: ((CDPEvent) -> Unit)? = null
+
+    /**
+     * Creates a Node process and provides a context for communicating with it.
+     * After [block] returns, the Node process is destroyed.
+     */
+    fun <T> run(block: suspend NodeJsInspectorClientContext.() -> T): T = runBlocking {
+        val context = NodeJsInspectorClientContextImpl(this@NodeJsInspectorClient)
+        try {
+            runWithContext(context, block)
+        } finally {
+            context.release()
+        }
+    }
+
+    private suspend fun <T> runWithContext(
+        context: NodeJsInspectorClientContextImpl,
+        block: suspend NodeJsInspectorClientContext.() -> T
+    ): T {
+        context.startWebsocketSession()
+
+        var blockResult: Result<T>? = null
+        block.startCoroutine(context, object : Continuation<T> {
+            override val context: CoroutineContext
+                get() = EmptyCoroutineContext
+
+            override fun resumeWith(result: Result<T>) {
+                blockResult = result
+            }
+        })
+
+        context.listenForMessages { message ->
+            when (val response = decodeCDPResponse(message) { context.messageContinuations[it]!!.first }) {
+                is CDPResponse.Event -> onDebuggerEventCallback?.invoke(response.event)
+                is CDPResponse.MethodInvocationResult -> context.messageContinuations.remove(response.id)!!.second.resume(response.result)
+                is CDPResponse.Error -> context.messageContinuations[response.id]!!.second.resumeWithException(
+                    IllegalStateException("error ${response.error.code}" + (response.error.message?.let { ": $it" } ?: ""))
+                )
+            }
+            context.waitingOnPredicate?.let { (predicate, continuation) ->
+                if (predicate()) {
+                    context.waitingOnPredicate = null
+                    continuation.resume(Unit)
+                }
+            }
+            blockResult != null
+        }
+
+        return blockResult!!.getOrThrow()
+    }
+
+    /**
+     * Installs a listener for Chrome DevTools Protocol events.
+     */
+    fun onEvent(receiveEvent: (CDPEvent) -> Unit) {
+        onDebuggerEventCallback = receiveEvent
+    }
+}
+
+private const val NODE_WS_DEBUG_URL_PREFIX = "Debugger listening on ws://"
+
+/**
+ * The actual implementation of the Node.js inspector client.
+ */
+private class NodeJsInspectorClientContextImpl(engine: NodeJsInspectorClient) : NodeJsInspectorClientContext, CDPRequestEvaluator {
+
+    private val logger = Logger.getLogger(this::class.java.name)
+
+    private val nodeProcess = ProcessBuilder(
+        System.getProperty("javascript.engine.path.NodeJs"),
+        "--inspect-brk=0",
+        engine.scriptPath,
+        *engine.args.toTypedArray()
+    ).also {
+        logger.fine(it::joinedCommand)
+    }.start()
+
+    /**
+     * The WebSocket address to connect to.
+     */
+    private val debugUrl: String = run {
+        val prompt = nodeProcess.errorStream.bufferedReader().readLine()
+        logger.fine(prompt)
+        if (prompt.startsWith(NODE_WS_DEBUG_URL_PREFIX)) {
+            val startIndexInLine = NODE_WS_DEBUG_URL_PREFIX.length - "ws://".length
+            prompt.substring(startIndexInLine).trim()
+        } else {
+            error(prompt)
+        }
+    }
+
+    private val webSocketClient = HttpClient(CIO) {
+        install(WebSockets)
+    }
+
+    private var webSocketSession: DefaultClientWebSocketSession? = null
+
+    val messageContinuations = mutableMapOf<Int, Pair<CDPMethodCallEncodingInfo, Continuation<CDPMethodInvocationResult>>>()
+
+    /**
+     * See [waitForConditionToBecomeTrue].
+     */
+    var waitingOnPredicate: Pair<(() -> Boolean), Continuation<Unit>>? = null
+
+    private var nextMessageId = 0
+
+    suspend fun startWebsocketSession() {
+        webSocketSession = webSocketClient.webSocketSession(debugUrl)
+    }
+
+    private val loggingJsonPrettyPrinter by lazy { Json { prettyPrint = true } }
+
+    private fun prettyPrintJson(json: String): String {
+        val jsonElement = try {
+            Json.parseToJsonElement(json)
+        } catch (e: SerializationException) {
+            return json
+        }
+        return loggingJsonPrettyPrinter.encodeToString(jsonElement)
+    }
+
+    /**
+     * Starts a loop that waits for incoming Chrome DevTools Protocol messages and invokes [receiveMessage] when one is received.
+     * The loop stops as soon as at least one message is received *and* [receiveMessage] returns `true`.
+     */
+    suspend fun listenForMessages(receiveMessage: (String) -> Boolean) {
+        val session = webSocketSession ?: error("Session closed")
+        do {
+            val message = when (val frame = session.incoming.receive()) {
+                is Frame.Text -> frame.readText()
+                else -> error("Unexpected frame kind: $frame")
+            }
+            logger.fine {
+                "Received message:\n${prettyPrintJson(message)}"
+            }
+        } while (!receiveMessage(message))
+    }
+
+    override val debugger = Debugger(this)
+
+    override val runtime = Runtime(this)
+
+    override suspend fun waitForConditionToBecomeTrue(predicate: () -> Boolean) {
+        if (predicate()) return
+        suspendCoroutine { continuation ->
+            require(waitingOnPredicate == null) { "already waiting!" }
+            waitingOnPredicate = predicate to continuation
+        }
+    }
+
+    private suspend fun sendPlainTextMessage(message: String) {
+        val session = webSocketSession ?: error("Session closed")
+        logger.fine {
+            "Sent message:\n${prettyPrintJson(message)}"
+        }
+        session.send(message)
+    }
+
+    @Deprecated("Only for debugging purposes", level = DeprecationLevel.WARNING)
+    override suspend fun sendPlainTextMessage(methodName: String, paramsJson: String): String {
+        val messageId = nextMessageId++
+        sendPlainTextMessage("""{"id":$messageId,"method":$methodName,"params":$paramsJson}""")
+        return suspendCoroutine { continuation ->
+            messageContinuations[messageId] = CDPMethodCallEncodingInfoPlainText to continuation
+        }.cast<CDPMethodInvocationResultPlainText>().string
+    }
+
+    override suspend fun genericEvaluateRequest(
+        encodeMethodCallWithMessageId: (Int) -> Pair<String, CDPMethodCallEncodingInfo>
+    ): CDPMethodInvocationResult {
+        val messageId = nextMessageId++
+        val (encodedMessage, encodingInfo) = encodeMethodCallWithMessageId(messageId)
+        sendPlainTextMessage(encodedMessage)
+        return suspendCoroutine { continuation ->
+            messageContinuations[messageId] = encodingInfo to continuation
+        }
+    }
+
+    /**
+     * Releases all the resources and destroys the Node.js process.
+     */
+    suspend fun release() {
+        webSocketSession?.close()
+        webSocketSession = null
+        webSocketClient.close()
+        nodeProcess.destroy()
+    }
+}
+
+private fun ProcessBuilder.joinedCommand(): String =
+    command().joinToString(" ") { "\"${it.replace("\"", "\\\"")}\"" }
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.js.test.debugger
+
+/**
+ * An interface for invoking [Chrome DevTools protocol](https://chromedevtools.github.io/devtools-protocol/) methods.
+ *
+ * An instance of this interface is passed to the `block` closure in [NodeJsInspectorClient.run].
+ */
+interface NodeJsInspectorClientContext {
+
+    /**
+     * The [`Debugger` domain](https://chromedevtools.github.io/devtools-protocol/tot/Debugger/) of Chrome DevTools protocol.
+     */
+    val debugger: Debugger
+
+    /**
+     * The [`Runtime` domain](https://chromedevtools.github.io/devtools-protocol/tot/Runtime/) of Chrome DevTools protocol.
+     */
+    val runtime: Runtime
+
+    @Deprecated("Only for debugging purposes", level = DeprecationLevel.WARNING)
+    suspend fun sendPlainTextMessage(methodName: String, paramsJson: String): String
+
+    /**
+     * On each incoming message invokes [predicate], and returns only when [predicate] returns `true`.
+     */
+    suspend fun waitForConditionToBecomeTrue(predicate: () -> Boolean)
+}
+
+/**
+ * On each incoming message checks whether [test] returns `null`, and returns only when [test] returns non-`null` value.
+ */
+suspend inline fun <T> NodeJsInspectorClientContext.waitForValueToBecomeNonNull(crossinline test: () -> T?): T {
+    var value: T? = null
+    waitForConditionToBecomeTrue {
+        test()?.also {
+            value = it
+        } != null
+    }
+    return value!!
+}
@@ -0,0 +1,259 @@
+/*
+ * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+package org.jetbrains.kotlin.js.test.handlers
+
+import org.jetbrains.kotlin.KtPsiSourceFileLinesMapping
+import org.jetbrains.kotlin.ir.backend.js.transformers.irToJs.TranslationMode
+import org.jetbrains.kotlin.js.parser.sourcemaps.*
+import org.jetbrains.kotlin.js.test.debugger.*
+import org.jetbrains.kotlin.js.test.utils.getAllFilesForRunner
+import org.jetbrains.kotlin.js.test.utils.getBoxFunction
+import org.jetbrains.kotlin.psi.psiUtil.startOffset
+import org.jetbrains.kotlin.test.TargetBackend
+import org.jetbrains.kotlin.test.directives.JsEnvironmentConfigurationDirectives
+import org.jetbrains.kotlin.test.model.TestFile
+import org.jetbrains.kotlin.test.model.TestModule
+import org.jetbrains.kotlin.test.services.TestServices
+import org.jetbrains.kotlin.test.services.configuration.JsEnvironmentConfigurator
+import org.jetbrains.kotlin.test.services.moduleStructure
+import org.jetbrains.kotlin.test.utils.SteppingTestLoggedData
+import org.jetbrains.kotlin.test.utils.checkSteppingTestResult
+import org.jetbrains.kotlin.test.utils.formatAsSteppingTestExpectation
+import java.io.File
+import java.net.URI
+import java.net.URISyntaxException
+
+/**
+ * This class is an analogue of the [DebugRunner][org.jetbrains.kotlin.test.backend.handlers.DebugRunner] from JVM stepping tests.
+ *
+ * It runs a generated JavaScript file under a debugger, sets a breakpoint in the beginning of the `box` function
+ * and performs the "step into" action until there is nothing more to step into. On each pause it records the source file name,
+ * the source line and the function name of the current call frame, and compares this data with the expectations written in the test file.
+ *
+ * It uses sourcemaps for mapping locations in the generated JS file to the corresponding locations in the source Kotlin file.
+ * Also, it assumes that the sourcemap contains absolute paths to source files. The relative paths are replaced with
+ * absolute paths earlier by [JsSourceMapPathRewriter].
+ *
+ * Stepping tests only work with the IR backend. The legacy backend is not supported.
+ *
+ * For simplicity, only the [FULL][org.jetbrains.kotlin.ir.backend.js.transformers.irToJs.TranslationMode.FULL] translation mode is
+ * supported.
+ *
+ */
+class JsDebugRunner(testServices: TestServices) : AbstractJsArtifactsCollector(testServices) {
+    override fun processAfterAllModules(someAssertionWasFailed: Boolean) {
+        if (someAssertionWasFailed) return
+
+        val globalDirectives = testServices.moduleStructure.allDirectives
+        val esModules = JsEnvironmentConfigurationDirectives.ES_MODULES in globalDirectives
+
+        if (esModules) return
+
+        // This file generated in the FULL mode should be self-sufficient.
+        val jsFilePath = getAllFilesForRunner(testServices, modulesToArtifact)[TranslationMode.FULL]?.single()
+            ?: error("Only FULL translation mode is supported")
+
+        val mainModule = JsEnvironmentConfigurator.getMainModule(testServices)
+
+        val sourceMapFile = File("$jsFilePath.map")
+        val sourceMap = when (val parseResult = SourceMapParser.parse(sourceMapFile)) {
+            is SourceMapSuccess -> parseResult.value
+            is SourceMapError -> error(parseResult.message)
+        }
+
+        runGeneratedCode(jsFilePath, sourceMap, mainModule)
+    }
+
+    private fun runGeneratedCode(
+        jsFilePath: String,
+        sourceMap: SourceMap,
+        mainModule: TestModule,
+    ) {
+        val (testFileWithBoxFunction, boxFunctionStartLine) = getBoxFunctionStartLocation(mainModule)
+        val originalFileWithBoxFunction = testFileWithBoxFunction.originalFile
+
+        val boxFunctionLineInGeneratedFile =
+            sourceMap.breakpointLineInGeneratedFile(originalFileWithBoxFunction, boxFunctionStartLine)
+
+        if (boxFunctionLineInGeneratedFile < 0)
+            error("Could not find the location of the 'box' function in the generated file")
+
+        val debuggerFacade = NodeJsDebuggerFacade(jsFilePath)
+
+        val jsFileURI = File(jsFilePath).absoluteFile.toURI().withAuthority("")
+
+        val loggedItems = mutableListOf<SteppingTestLoggedData>()
+        debuggerFacade.run {
+            with(debuggerFacade) {
+                val boxFunctionBreakpoint = debugger.setBreakpointByUrl(boxFunctionLineInGeneratedFile, jsFileURI.toString())
+                debugger.resume()
+                waitForResumeEvent()
+                waitForPauseEvent {
+                    it.reason == Debugger.PauseReason.OTHER && it.hitBreakpoints.contains(boxFunctionBreakpoint.breakpointId)
+                }
+                while (true) {
+                    val topMostCallFrame = waitForPauseEvent().callFrames[0]
+                    try {
+                        if (URI(scriptUrlByScriptId(topMostCallFrame.location.scriptId)) != jsFileURI) break
+                    } catch (_: URISyntaxException) {
+                        // Probably something like 'evalmachine.<anonymous>' brought us here. Ignore.
+                    }
+                    addCallFrameInfoToLoggedItems(sourceMap, topMostCallFrame, loggedItems)
+                    debugger.stepInto()
+                    waitForResumeEvent()
+                }
+            }
+        }
+        checkSteppingTestResult(
+            mainModule.frontendKind,
+            mainModule.targetBackend ?: TargetBackend.JS_IR,
+            originalFileWithBoxFunction,
+            loggedItems
+        )
+    }
+
+    private fun addCallFrameInfoToLoggedItems(
+        sourceMap: SourceMap,
+        topMostCallFrame: Debugger.CallFrame,
+        loggedItems: MutableList<SteppingTestLoggedData>
+    ) {
+        sourceMap.getSourceLineForGeneratedLocation(topMostCallFrame.location)?.let { (sourceFile, sourceLine) ->
+            val testFileName = testFileNameFromMappedLocation(sourceFile, sourceLine) ?: return
+            val expectation =
+                formatAsSteppingTestExpectation(testFileName, sourceLine + 1, topMostCallFrame.functionName, false)
+            loggedItems.add(SteppingTestLoggedData(sourceLine + 1, false, expectation))
+        }
+    }
+
+    /**
+     * Returns the test file and the line number in that file where the body of the `box` function begins.
+     */
+    private fun getBoxFunctionStartLocation(mainModule: TestModule): Pair<TestFile, Int> {
+        val boxFunction = getBoxFunction(testServices) ?: error("Missing 'box' function")
+        val file = boxFunction.containingKtFile
+        val mapping = KtPsiSourceFileLinesMapping(file)
+        val firstStatementOffset = boxFunction.bodyBlockExpression?.firstStatement?.startOffset
+            ?: boxFunction.bodyExpression?.startOffset
+            ?: boxFunction.startOffset
+        return mainModule.files.single { it.name == file.name } to mapping.getLineByOffset(firstStatementOffset)
+    }
+
+    /**
+     * Maps the location in the source file to the location in the generated file.
+     *
+     * The Node.js debugger is not sourcemap-aware, so we need to set a breakpoint in the `box` function in the generated JS file.
+     *
+     * We don't know where the generated `box` function is located, so we use the source map to figure it out.
+     *
+     * This is basically what Intellij IDEA's built-in JavaScript debugger does when you set a breakpoint in a source file: it tries
+     * to map the location of the breakpoint in the source file to a location in the generated file. Here we use a simplified
+     * algorithm for that.
+     */
+    private fun SourceMap.breakpointLineInGeneratedFile(sourceFile: File, sourceLine: Int): Int {
+        val sourceFileAbsolutePath = sourceFile.absoluteFile.normalize()
+        var candidateSegment: Pair<Int, SourceMapSegment>? = null
+        for ((generatedLineNumber, group) in groups.withIndex()) {
+            for (segment in group.segments) {
+                if (segment.sourceFileName?.let { File(it).absoluteFile.normalize() } != sourceFileAbsolutePath ||
+                    segment.sourceLineNumber != sourceLine)
+                    continue
+                if (candidateSegment == null)
+                    candidateSegment = generatedLineNumber to segment
+                // Find the segment that points to the earliest column in the source file
+                if (segment.sourceColumnNumber < candidateSegment.second.sourceColumnNumber)
+                    candidateSegment = generatedLineNumber to segment
+            }
+        }
+        return candidateSegment?.first ?: -1
+    }
+
+    /**
+     * Maps [location] in the generated JavaScript file to the corresponding location in a source file.
+     * @return The source file path (as specified in the source map) and the line number in that source file.
+     */
+    private fun SourceMap.getSourceLineForGeneratedLocation(location: Debugger.Location): Pair<String, Int>? {
+
+        fun SourceMapSegment.sourceFileAndLine() = sourceFileName!! to sourceLineNumber
+
+        val group = groups.getOrNull(location.lineNumber)?.takeIf { it.segments.isNotEmpty() } ?: return null
+        val columnNumber = location.columnNumber ?: return group.segments[0].sourceFileAndLine()
+        val segment = if (columnNumber <= group.segments[0].generatedColumnNumber) {
+            group.segments[0]
+        } else {
+            group.segments.find {
+                columnNumber > it.generatedColumnNumber
+            }
+        }
+        return segment?.sourceFileAndLine()
+    }
+
+    /**
+     * An original test file may represent multiple source files (by using the `// FILE: myFile.kt` comments).
+     * Sourcemaps contain paths to original test files. However, in test expectations we write names as in the `// FILE:` comments.
+     * This function maps a location in the original test file to the name specified in a `// FILE:` comment.
+     */
+    private fun testFileNameFromMappedLocation(originalFilePath: String, originalFileLineNumber: Int): String? {
+        val originalFile = File(originalFilePath)
+        return testServices.moduleStructure.modules.flatMap { it.files }.findLast {
+            it.originalFile.absolutePath == originalFile.absolutePath && it.startLineNumberInOriginalFile <= originalFileLineNumber
+        }?.name
+    }
+}
+
+/**
+ * A wrapper around [NodeJsInspectorClient] that handles all the ceremony and allows us to only care about executing common debugging
+ * actions.
+ *
+ * @param jsFilePath the test file to execute and debug.
+ */
+private class NodeJsDebuggerFacade(jsFilePath: String) {
+
+    private val inspector = NodeJsInspectorClient("js/js.translator/testData/runIrTestInNode.js", listOf(jsFilePath))
+
+    private val scriptUrls = mutableMapOf<Runtime.ScriptId, String>()
+
+    private var pausedEvent: Debugger.Event.Paused? = null
+
+    init {
+        inspector.onEvent { event ->
+            when (event) {
+                is Debugger.Event.ScriptParsed -> {
+                    scriptUrls[event.scriptId] = event.url
+                }
+                is Debugger.Event.Paused -> {
+                    pausedEvent = event
+                }
+                is Debugger.Event.Resumed -> {
+                    pausedEvent = null
+                }
+                else -> {}
+            }
+        }
+    }
+
+    /**
+     * By the time [body] is called, the execution is paused, no code is executed yet.
+     */
+    fun <T> run(body: suspend NodeJsInspectorClientContext.() -> T) = inspector.run {
+        debugger.enable()
+        debugger.setSkipAllPauses(false)
+        runtime.runIfWaitingForDebugger()
+        waitForPauseEvent { it.reason == Debugger.PauseReason.BREAK_ON_START }
+
+        body()
+    }
+
+    fun scriptUrlByScriptId(scriptId: Runtime.ScriptId) = scriptUrls[scriptId] ?: error("unknown scriptId")
+
+    suspend fun NodeJsInspectorClientContext.waitForPauseEvent(suchThat: (Debugger.Event.Paused) -> Boolean = { true }) =
+        waitForValueToBecomeNonNull {
+            pausedEvent?.takeIf(suchThat)
+        }
+
+    suspend fun NodeJsInspectorClientContext.waitForResumeEvent() = waitForConditionToBecomeTrue { pausedEvent == null }
+}
+
+private fun URI.withAuthority(newAuthority: String?) =
+    URI(scheme, newAuthority, path, query, fragment)
@@ -153,6 +153,21 @@ open class AbstractJsIrLineNumberTest : AbstractJsIrTest(
    }
 }

+open class AbstractIrJsSteppingTest : AbstractJsIrTest(
+    pathToTestDir = "compiler/testData/debug/stepping/",
+    testGroupOutputDirPrefix = "debug/stepping/"
+) {
+    override fun TestConfigurationBuilder.configuration() {
+        commonConfigurationForJsBlackBoxCodegenTest()
+        defaultDirectives {
+            +JsEnvironmentConfigurationDirectives.NO_COMMON_FILES
+        }
+        jsArtifactsHandlersStep {
+            useHandlers(::JsDebugRunner)
+        }
+    }
+}
+
 open class AbstractIrCodegenWasmJsInteropJsTest : AbstractJsIrTest(
    pathToTestDir = "compiler/testData/codegen/wasmJsInterop",
    testGroupOutputDirPrefix = "codegen/wasmJsInteropJs"
@@ -12,6 +12,7 @@ import org.jetbrains.kotlin.js.test.JsAdditionalSourceProvider
 import org.jetbrains.kotlin.js.test.converters.augmentWithModuleName
 import org.jetbrains.kotlin.js.test.handlers.JsBoxRunner.Companion.TEST_FUNCTION
 import org.jetbrains.kotlin.js.testOld.*
+import org.jetbrains.kotlin.psi.KtDeclaration
 import org.jetbrains.kotlin.psi.KtNamedFunction
 import org.jetbrains.kotlin.serialization.js.ModuleKind
 import org.jetbrains.kotlin.test.TargetBackend
@@ -24,6 +25,7 @@ import org.jetbrains.kotlin.test.model.TestModule
 import org.jetbrains.kotlin.test.services.*
 import org.jetbrains.kotlin.test.services.configuration.JsEnvironmentConfigurator
 import org.jetbrains.kotlin.test.services.configuration.JsEnvironmentConfigurator.Companion.getMainModule
+import org.jetbrains.kotlin.util.collectionUtils.filterIsInstanceAnd
 import java.io.File

 private const val MODULE_EMULATION_FILE = "${JsEnvironmentConfigurator.TEST_DATA_DIR_PATH}/moduleEmulation.js"
@@ -192,7 +194,7 @@ fun getTestModuleName(testServices: TestServices): String? {
    return getMainModule(testServices).name
 }

-fun extractTestPackage(testServices: TestServices): String? {
+fun getBoxFunction(testServices: TestServices): KtNamedFunction? {
    val runPlainBoxFunction = RUN_PLAIN_BOX_FUNCTION in testServices.moduleStructure.allDirectives
    if (runPlainBoxFunction) return null
    val ktFiles = testServices.moduleStructure.modules.flatMap { module ->
@@ -204,12 +206,14 @@ fun extractTestPackage(testServices: TestServices): String? {
            }
    }

-    return ktFiles.singleOrNull { ktFile ->
-        val boxFunction = ktFile.declarations.find { it is KtNamedFunction && it.name == TEST_FUNCTION }
-        boxFunction != null
-    }?.packageFqName?.asString()?.takeIf { it.isNotEmpty() }
+    return ktFiles.mapNotNull { ktFile ->
+        ktFile.declarations.filterIsInstanceAnd<KtNamedFunction> { it.name == TEST_FUNCTION }.firstOrNull()
+    }.singleOrNull()
 }

+fun extractTestPackage(testServices: TestServices): String? =
+    getBoxFunction(testServices)?.containingKtFile?.packageFqName?.asString()?.takeIf { it.isNotEmpty() }
+
 fun getTestChecker(testServices: TestServices): AbstractJsTestChecker {
    val runTestInNashorn = java.lang.Boolean.getBoolean("kotlin.js.useNashorn")
    val targetBackend = testServices.defaultsProvider.defaultTargetBackend ?: TargetBackend.JS
@@ -0,0 +1,585 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.js.test.ir;
+
+import com.intellij.testFramework.TestDataPath;
+import org.jetbrains.kotlin.test.util.KtTestUtil;
+import org.jetbrains.kotlin.test.TargetBackend;
+import org.jetbrains.kotlin.test.TestMetadata;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+
+import java.io.File;
+import java.util.regex.Pattern;
+
+/** This class is generated by {@link GenerateNewCompilerTests.kt}. DO NOT MODIFY MANUALLY */
+@SuppressWarnings("all")
+@TestMetadata("compiler/testData/debug/stepping")
+@TestDataPath("$PROJECT_ROOT")
+public class IrJsSteppingTestGenerated extends AbstractIrJsSteppingTest {
+    @Test
+    public void testAllFilesPresentInStepping() throws Exception {
+        KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/debug/stepping"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS_IR, true);
+    }
+
+    @Test
+    @TestMetadata("anonymousFunction.kt")
+    public void testAnonymousFunction() throws Exception {
+        runTest("compiler/testData/debug/stepping/anonymousFunction.kt");
+    }
+
+    @Test
+    @TestMetadata("anonymousFunctionDirect.kt")
+    public void testAnonymousFunctionDirect() throws Exception {
+        runTest("compiler/testData/debug/stepping/anonymousFunctionDirect.kt");
+    }
+
+    @Test
+    @TestMetadata("assertion.kt")
+    public void testAssertion() throws Exception {
+        runTest("compiler/testData/debug/stepping/assertion.kt");
+    }
+
+    @Test
+    @TestMetadata("beforeGotoToWhileStart.kt")
+    public void testBeforeGotoToWhileStart() throws Exception {
+        runTest("compiler/testData/debug/stepping/beforeGotoToWhileStart.kt");
+    }
+
+    @Test
+    @TestMetadata("callWithCallInArguments.kt")
+    public void testCallWithCallInArguments() throws Exception {
+        runTest("compiler/testData/debug/stepping/callWithCallInArguments.kt");
+    }
+
+    @Test
+    @TestMetadata("callWithReceiver.kt")
+    public void testCallWithReceiver() throws Exception {
+        runTest("compiler/testData/debug/stepping/callWithReceiver.kt");
+    }
+
+    @Test
+    @TestMetadata("callableReference.kt")
+    public void testCallableReference() throws Exception {
+        runTest("compiler/testData/debug/stepping/callableReference.kt");
+    }
+
+    @Test
+    @TestMetadata("chainCall.kt")
+    public void testChainCall() throws Exception {
+        runTest("compiler/testData/debug/stepping/chainCall.kt");
+    }
+
+    @Test
+    @TestMetadata("class.kt")
+    public void testClass() throws Exception {
+        runTest("compiler/testData/debug/stepping/class.kt");
+    }
+
+    @Test
+    @TestMetadata("classObject.kt")
+    public void testClassObject() throws Exception {
+        runTest("compiler/testData/debug/stepping/classObject.kt");
+    }
+
+    @Test
+    @TestMetadata("compileTimeConstant.kt")
+    public void testCompileTimeConstant() throws Exception {
+        runTest("compiler/testData/debug/stepping/compileTimeConstant.kt");
+    }
+
+    @Test
+    @TestMetadata("conjunction.kt")
+    public void testConjunction() throws Exception {
+        runTest("compiler/testData/debug/stepping/conjunction.kt");
+    }
+
+    @Test
+    @TestMetadata("constantConditions.kt")
+    public void testConstantConditions() throws Exception {
+        runTest("compiler/testData/debug/stepping/constantConditions.kt");
+    }
+
+    @Test
+    @TestMetadata("constructorCall.kt")
+    public void testConstructorCall() throws Exception {
+        runTest("compiler/testData/debug/stepping/constructorCall.kt");
+    }
+
+    @Test
+    @TestMetadata("constructors.kt")
+    public void testConstructors() throws Exception {
+        runTest("compiler/testData/debug/stepping/constructors.kt");
+    }
+
+    @Test
+    @TestMetadata("dataClass.kt")
+    public void testDataClass() throws Exception {
+        runTest("compiler/testData/debug/stepping/dataClass.kt");
+    }
+
+    @Test
+    @TestMetadata("defaultParameter.kt")
+    public void testDefaultParameter() throws Exception {
+        runTest("compiler/testData/debug/stepping/defaultParameter.kt");
+    }
+
+    @Test
+    @TestMetadata("enum.kt")
+    public void testEnum() throws Exception {
+        runTest("compiler/testData/debug/stepping/enum.kt");
+    }
+
+    @Test
+    @TestMetadata("for.kt")
+    public void testFor() throws Exception {
+        runTest("compiler/testData/debug/stepping/for.kt");
+    }
+
+    @Test
+    @TestMetadata("functionCallWithDefault.kt")
+    public void testFunctionCallWithDefault() throws Exception {
+        runTest("compiler/testData/debug/stepping/functionCallWithDefault.kt");
+    }
+
+    @Test
+    @TestMetadata("functionCallWithInlinedLambdaParam.kt")
+    public void testFunctionCallWithInlinedLambdaParam() throws Exception {
+        runTest("compiler/testData/debug/stepping/functionCallWithInlinedLambdaParam.kt");
+    }
+
+    @Test
+    @TestMetadata("functionCallWithLambdaParam.kt")
+    public void testFunctionCallWithLambdaParam() throws Exception {
+        runTest("compiler/testData/debug/stepping/functionCallWithLambdaParam.kt");
+    }
+
+    @Test
+    @TestMetadata("functionInAnotherFile.kt")
+    public void testFunctionInAnotherFile() throws Exception {
+        runTest("compiler/testData/debug/stepping/functionInAnotherFile.kt");
+    }
+
+    @Test
+    @TestMetadata("if.kt")
+    public void testIf() throws Exception {
+        runTest("compiler/testData/debug/stepping/if.kt");
+    }
+
+    @Test
+    @TestMetadata("if2.kt")
+    public void testIf2() throws Exception {
+        runTest("compiler/testData/debug/stepping/if2.kt");
+    }
+
+    @Test
+    @TestMetadata("ifThen.kt")
+    public void testIfThen() throws Exception {
+        runTest("compiler/testData/debug/stepping/ifThen.kt");
+    }
+
+    @Test
+    @TestMetadata("ifThenElse.kt")
+    public void testIfThenElse() throws Exception {
+        runTest("compiler/testData/debug/stepping/ifThenElse.kt");
+    }
+
+    @Test
+    @TestMetadata("ifThenElseFalse.kt")
+    public void testIfThenElseFalse() throws Exception {
+        runTest("compiler/testData/debug/stepping/ifThenElseFalse.kt");
+    }
+
+    @Test
+    @TestMetadata("IfTrueThenFalse.kt")
+    public void testIfTrueThenFalse() throws Exception {
+        runTest("compiler/testData/debug/stepping/IfTrueThenFalse.kt");
+    }
+
+    @Test
+    @TestMetadata("ifWithInlineInCondition.kt")
+    public void testIfWithInlineInCondition() throws Exception {
+        runTest("compiler/testData/debug/stepping/ifWithInlineInCondition.kt");
+    }
+
+    @Test
+    @TestMetadata("iincStepping.kt")
+    public void testIincStepping() throws Exception {
+        runTest("compiler/testData/debug/stepping/iincStepping.kt");
+    }
+
+    @Test
+    @TestMetadata("inTheEndOfLambdaArgumentOfInlineCall.kt")
+    public void testInTheEndOfLambdaArgumentOfInlineCall() throws Exception {
+        runTest("compiler/testData/debug/stepping/inTheEndOfLambdaArgumentOfInlineCall.kt");
+    }
+
+    @Test
+    @TestMetadata("initBlocks.kt")
+    public void testInitBlocks() throws Exception {
+        runTest("compiler/testData/debug/stepping/initBlocks.kt");
+    }
+
+    @Test
+    @TestMetadata("initBlocksCompanion.kt")
+    public void testInitBlocksCompanion() throws Exception {
+        runTest("compiler/testData/debug/stepping/initBlocksCompanion.kt");
+    }
+
+    @Test
+    @TestMetadata("inlineCallableReference.kt")
+    public void testInlineCallableReference() throws Exception {
+        runTest("compiler/testData/debug/stepping/inlineCallableReference.kt");
+    }
+
+    @Test
+    @TestMetadata("inlineNamedCallableReference.kt")
+    public void testInlineNamedCallableReference() throws Exception {
+        runTest("compiler/testData/debug/stepping/inlineNamedCallableReference.kt");
+    }
+
+    @Test
+    @TestMetadata("inlineSimpleCall.kt")
+    public void testInlineSimpleCall() throws Exception {
+        runTest("compiler/testData/debug/stepping/inlineSimpleCall.kt");
+    }
+
+    @Test
+    @TestMetadata("kt15259.kt")
+    public void testKt15259() throws Exception {
+        runTest("compiler/testData/debug/stepping/kt15259.kt");
+    }
+
+    @Test
+    @TestMetadata("kt29179.kt")
+    public void testKt29179() throws Exception {
+        runTest("compiler/testData/debug/stepping/kt29179.kt");
+    }
+
+    @Test
+    @TestMetadata("kt42208.kt")
+    public void testKt42208() throws Exception {
+        runTest("compiler/testData/debug/stepping/kt42208.kt");
+    }
+
+    @Test
+    @TestMetadata("kt42208b.kt")
+    public void testKt42208b() throws Exception {
+        runTest("compiler/testData/debug/stepping/kt42208b.kt");
+    }
+
+    @Test
+    @TestMetadata("kt42208c.kt")
+    public void testKt42208c() throws Exception {
+        runTest("compiler/testData/debug/stepping/kt42208c.kt");
+    }
+
+    @Test
+    @TestMetadata("lambdaStepInline.kt")
+    public void testLambdaStepInline() throws Exception {
+        runTest("compiler/testData/debug/stepping/lambdaStepInline.kt");
+    }
+
+    @Test
+    @TestMetadata("lambdaStepInlineWithDefaults.kt")
+    public void testLambdaStepInlineWithDefaults() throws Exception {
+        runTest("compiler/testData/debug/stepping/lambdaStepInlineWithDefaults.kt");
+    }
+
+    @Test
+    @TestMetadata("lineNumberAfterInline.kt")
+    public void testLineNumberAfterInline() throws Exception {
+        runTest("compiler/testData/debug/stepping/lineNumberAfterInline.kt");
+    }
+
+    @Test
+    @TestMetadata("linenumberForOneParametersArgumentCall.kt")
+    public void testLinenumberForOneParametersArgumentCall() throws Exception {
+        runTest("compiler/testData/debug/stepping/linenumberForOneParametersArgumentCall.kt");
+    }
+
+    @Test
+    @TestMetadata("localFunction.kt")
+    public void testLocalFunction() throws Exception {
+        runTest("compiler/testData/debug/stepping/localFunction.kt");
+    }
+
+    @Test
+    @TestMetadata("localFunctionWIthOnelineExpressionBody.kt")
+    public void testLocalFunctionWIthOnelineExpressionBody() throws Exception {
+        runTest("compiler/testData/debug/stepping/localFunctionWIthOnelineExpressionBody.kt");
+    }
+
+    @Test
+    @TestMetadata("localProperty.kt")
+    public void testLocalProperty() throws Exception {
+        runTest("compiler/testData/debug/stepping/localProperty.kt");
+    }
+
+    @Test
+    @TestMetadata("multiModule.kt")
+    public void testMultiModule() throws Exception {
+        runTest("compiler/testData/debug/stepping/multiModule.kt");
+    }
+
+    @Test
+    @TestMetadata("multilineExpression.kt")
+    public void testMultilineExpression() throws Exception {
+        runTest("compiler/testData/debug/stepping/multilineExpression.kt");
+    }
+
+    @Test
+    @TestMetadata("multilineFunctionCall.kt")
+    public void testMultilineFunctionCall() throws Exception {
+        runTest("compiler/testData/debug/stepping/multilineFunctionCall.kt");
+    }
+
+    @Test
+    @TestMetadata("multilineInfixCall.kt")
+    public void testMultilineInfixCall() throws Exception {
+        runTest("compiler/testData/debug/stepping/multilineInfixCall.kt");
+    }
+
+    @Test
+    @TestMetadata("namedCallableReference.kt")
+    public void testNamedCallableReference() throws Exception {
+        runTest("compiler/testData/debug/stepping/namedCallableReference.kt");
+    }
+
+    @Test
+    @TestMetadata("nestedInline.kt")
+    public void testNestedInline() throws Exception {
+        runTest("compiler/testData/debug/stepping/nestedInline.kt");
+    }
+
+    @Test
+    @TestMetadata("noParametersArgumentCallInExpression.kt")
+    public void testNoParametersArgumentCallInExpression() throws Exception {
+        runTest("compiler/testData/debug/stepping/noParametersArgumentCallInExpression.kt");
+    }
+
+    @Test
+    @TestMetadata("nullcheck.kt")
+    public void testNullcheck() throws Exception {
+        runTest("compiler/testData/debug/stepping/nullcheck.kt");
+    }
+
+    @Test
+    @TestMetadata("primitiveNullChecks.kt")
+    public void testPrimitiveNullChecks() throws Exception {
+        runTest("compiler/testData/debug/stepping/primitiveNullChecks.kt");
+    }
+
+    @Test
+    @TestMetadata("propertyAccessor.kt")
+    public void testPropertyAccessor() throws Exception {
+        runTest("compiler/testData/debug/stepping/propertyAccessor.kt");
+    }
+
+    @Test
+    @TestMetadata("psvm.kt")
+    public void testPsvm() throws Exception {
+        runTest("compiler/testData/debug/stepping/psvm.kt");
+    }
+
+    @Test
+    @TestMetadata("recursion.kt")
+    public void testRecursion() throws Exception {
+        runTest("compiler/testData/debug/stepping/recursion.kt");
+    }
+
+    @Test
+    @TestMetadata("simpleDefaultArg.kt")
+    public void testSimpleDefaultArg() throws Exception {
+        runTest("compiler/testData/debug/stepping/simpleDefaultArg.kt");
+    }
+
+    @Test
+    @TestMetadata("simpleDefaultArgWithInline.kt")
+    public void testSimpleDefaultArgWithInline() throws Exception {
+        runTest("compiler/testData/debug/stepping/simpleDefaultArgWithInline.kt");
+    }
+
+    @Test
+    @TestMetadata("simpleInlineDefaultArg.kt")
+    public void testSimpleInlineDefaultArg() throws Exception {
+        runTest("compiler/testData/debug/stepping/simpleInlineDefaultArg.kt");
+    }
+
+    @Test
+    @TestMetadata("simpleSmap.kt")
+    public void testSimpleSmap() throws Exception {
+        runTest("compiler/testData/debug/stepping/simpleSmap.kt");
+    }
+
+    @Test
+    @TestMetadata("smapInlineAsArgument.kt")
+    public void testSmapInlineAsArgument() throws Exception {
+        runTest("compiler/testData/debug/stepping/smapInlineAsArgument.kt");
+    }
+
+    @Test
+    @TestMetadata("smapInlineAsInfixArgument.kt")
+    public void testSmapInlineAsInfixArgument() throws Exception {
+        runTest("compiler/testData/debug/stepping/smapInlineAsInfixArgument.kt");
+    }
+
+    @Test
+    @TestMetadata("smapInlineAsInlineArgument.kt")
+    public void testSmapInlineAsInlineArgument() throws Exception {
+        runTest("compiler/testData/debug/stepping/smapInlineAsInlineArgument.kt");
+    }
+
+    @Test
+    @TestMetadata("smapInlineInIntrinsicArgument.kt")
+    public void testSmapInlineInIntrinsicArgument() throws Exception {
+        runTest("compiler/testData/debug/stepping/smapInlineInIntrinsicArgument.kt");
+    }
+
+    @Test
+    @TestMetadata("stringSwitches.kt")
+    public void testStringSwitches() throws Exception {
+        runTest("compiler/testData/debug/stepping/stringSwitches.kt");
+    }
+
+    @Test
+    @TestMetadata("stringSwitchesSmall.kt")
+    public void testStringSwitchesSmall() throws Exception {
+        runTest("compiler/testData/debug/stepping/stringSwitchesSmall.kt");
+    }
+
+    @Test
+    @TestMetadata("suspendFunWithLambdaParameter.kt")
+    public void testSuspendFunWithLambdaParameter() throws Exception {
+        runTest("compiler/testData/debug/stepping/suspendFunWithLambdaParameter.kt");
+    }
+
+    @Test
+    @TestMetadata("suspendFunWithSuspendLambdaParameter.kt")
+    public void testSuspendFunWithSuspendLambdaParameter() throws Exception {
+        runTest("compiler/testData/debug/stepping/suspendFunWithSuspendLambdaParameter.kt");
+    }
+
+    @Test
+    @TestMetadata("throwException.kt")
+    public void testThrowException() throws Exception {
+        runTest("compiler/testData/debug/stepping/throwException.kt");
+    }
+
+    @Test
+    @TestMetadata("topLevel.kt")
+    public void testTopLevel() throws Exception {
+        runTest("compiler/testData/debug/stepping/topLevel.kt");
+    }
+
+    @Test
+    @TestMetadata("trait.kt")
+    public void testTrait() throws Exception {
+        runTest("compiler/testData/debug/stepping/trait.kt");
+    }
+
+    @Test
+    @TestMetadata("tryCatch.kt")
+    public void testTryCatch() throws Exception {
+        runTest("compiler/testData/debug/stepping/tryCatch.kt");
+    }
+
+    @Test
+    @TestMetadata("tryCatchExpression.kt")
+    public void testTryCatchExpression() throws Exception {
+        runTest("compiler/testData/debug/stepping/tryCatchExpression.kt");
+    }
+
+    @Test
+    @TestMetadata("tryCatchFinally.kt")
+    public void testTryCatchFinally() throws Exception {
+        runTest("compiler/testData/debug/stepping/tryCatchFinally.kt");
+    }
+
+    @Test
+    @TestMetadata("tryFinally.kt")
+    public void testTryFinally() throws Exception {
+        runTest("compiler/testData/debug/stepping/tryFinally.kt");
+    }
+
+    @Test
+    @TestMetadata("variablesWithoutInitializer.kt")
+    public void testVariablesWithoutInitializer() throws Exception {
+        runTest("compiler/testData/debug/stepping/variablesWithoutInitializer.kt");
+    }
+
+    @Test
+    @TestMetadata("voidLambdaStepInline.kt")
+    public void testVoidLambdaStepInline() throws Exception {
+        runTest("compiler/testData/debug/stepping/voidLambdaStepInline.kt");
+    }
+
+    @Test
+    @TestMetadata("when.kt")
+    public void testWhen() throws Exception {
+        runTest("compiler/testData/debug/stepping/when.kt");
+    }
+
+    @Test
+    @TestMetadata("whenComplicatedSubject.kt")
+    public void testWhenComplicatedSubject() throws Exception {
+        runTest("compiler/testData/debug/stepping/whenComplicatedSubject.kt");
+    }
+
+    @Test
+    @TestMetadata("whenConstant.kt")
+    public void testWhenConstant() throws Exception {
+        runTest("compiler/testData/debug/stepping/whenConstant.kt");
+    }
+
+    @Test
+    @TestMetadata("whenIsChecks.kt")
+    public void testWhenIsChecks() throws Exception {
+        runTest("compiler/testData/debug/stepping/whenIsChecks.kt");
+    }
+
+    @Test
+    @TestMetadata("whenMultiLine.kt")
+    public void testWhenMultiLine() throws Exception {
+        runTest("compiler/testData/debug/stepping/whenMultiLine.kt");
+    }
+
+    @Test
+    @TestMetadata("whenMultiLineSubject.kt")
+    public void testWhenMultiLineSubject() throws Exception {
+        runTest("compiler/testData/debug/stepping/whenMultiLineSubject.kt");
+    }
+
+    @Test
+    @TestMetadata("whenNullalbeSubject.kt")
+    public void testWhenNullalbeSubject() throws Exception {
+        runTest("compiler/testData/debug/stepping/whenNullalbeSubject.kt");
+    }
+
+    @Test
+    @TestMetadata("whenSubject.kt")
+    public void testWhenSubject() throws Exception {
+        runTest("compiler/testData/debug/stepping/whenSubject.kt");
+    }
+
+    @Test
+    @TestMetadata("whenSubject2.kt")
+    public void testWhenSubject2() throws Exception {
+        runTest("compiler/testData/debug/stepping/whenSubject2.kt");
+    }
+
+    @Test
+    @TestMetadata("whenWithInlineInCondition.kt")
+    public void testWhenWithInlineInCondition() throws Exception {
+        runTest("compiler/testData/debug/stepping/whenWithInlineInCondition.kt");
+    }
+
+    @Test
+    @TestMetadata("while.kt")
+    public void testWhile() throws Exception {
+        runTest("compiler/testData/debug/stepping/while.kt");
+    }
+}
@@ -11,7 +11,7 @@ dependencies {
    testCompileOnly(project(":kotlin-test:kotlin-test-jvm"))
    testCompileOnly(project(":kotlin-test:kotlin-test-junit"))
    testImplementation(projectTests(":compiler:tests-common"))
-    testImplementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.0.0")
+    testImplementation(commonDependency("org.jetbrains.kotlinx", "kotlinx-serialization-json"))
 }


@@ -74,4 +74,4 @@ projectTest("test", true) {
    workingDir = projectDir
 }

-testsJar()
+testsJar()