[JS IR] Add test for cross module export

js/js.tests/test/org/jetbrains/kotlin/js/test/es6/semantics/IrBoxJsES6TestGenerated.java

@@ -819,6 +819,11 @@ public class IrBoxJsES6TestGenerated extends AbstractIrBoxJsES6Test {
             runTest("js/js.translator/testData/box/crossModuleRefIR/constructor.kt");
         }
 
+        @TestMetadata("crossModuleJsExport.kt")
+        public void testCrossModuleJsExport() throws Exception {
+            runTest("js/js.translator/testData/box/crossModuleRefIR/crossModuleJsExport.kt");
+        }
+
         @TestMetadata("export.kt")
         public void testExport() throws Exception {
             runTest("js/js.translator/testData/box/crossModuleRefIR/export.kt");

js/js.tests/test/org/jetbrains/kotlin/js/test/ir/semantics/IrBoxJsTestGenerated.java

@@ -819,6 +819,11 @@ public class IrBoxJsTestGenerated extends AbstractIrBoxJsTest {
             runTest("js/js.translator/testData/box/crossModuleRefIR/constructor.kt");
         }
 
+        @TestMetadata("crossModuleJsExport.kt")
+        public void testCrossModuleJsExport() throws Exception {
+            runTest("js/js.translator/testData/box/crossModuleRefIR/crossModuleJsExport.kt");
+        }
+
         @TestMetadata("export.kt")
         public void testExport() throws Exception {
             runTest("js/js.translator/testData/box/crossModuleRefIR/export.kt");

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java

@@ -819,6 +819,11 @@ public class BoxJsTestGenerated extends AbstractBoxJsTest {
             runTest("js/js.translator/testData/box/crossModuleRefIR/constructor.kt");
         }
 
+        @TestMetadata("crossModuleJsExport.kt")
+        public void testCrossModuleJsExport() throws Exception {
+            runTest("js/js.translator/testData/box/crossModuleRefIR/crossModuleJsExport.kt");
+        }
+
         @TestMetadata("export.kt")
         public void testExport() throws Exception {
             runTest("js/js.translator/testData/box/crossModuleRefIR/export.kt");

js/js.translator/testData/box/crossModuleRefIR/crossModuleJsExport.kt

@@ -0,0 +1,80 @@
+// IGNORE_BACKEND: JS
+// SPLIT_PER_MODULE
+// RUN_PLAIN_BOX_FUNCTION
+// EXPECTED_REACHABLE_NODES: 1316
+
+// MODULE: lib0
+// FILE: lib0.kt
+
+class Dep {
+    fun bee() = "beedep"
+}
+
+// MODULE: lib1
+// FILE: lib1.kt
+
+@JsExport
+fun O(): String = "O"
+
+// MODULE: lib2(lib1, lib0)
+// FILE: file.kt
+@file:JsExport
+
+
+fun K(): String = "K"
+fun f2f(): Int = 42
+
+// FILE: decl.kt
+
+@JsExport
+fun fooFun(): Int = 53
+
+@JsExport
+class CCC {
+    fun bux() = 64
+}
+
+@JsExport
+fun doCCC() = CCC()
+
+@JsExport
+val prop: String
+    get() = "kek"
+
+@JsExport
+fun dep() = Dep()
+
+// MODULE: main(lib1, lib2)
+// FILE: main.kt
+
+@JsExport
+fun test() = O() + K()
+
+// FILE: test.js
+
+function box() {
+
+    if (kotlin_lib2.f2f() != 42) return "fail 42";
+
+    if (kotlin_lib2.fooFun() != 53) return "fail fooFun";
+
+    var c = kotlin_lib2.doCCC();
+
+    var CCC = kotlin_lib2.CCC
+
+    if (c.bux() != 64) return "fail CCC.bux"
+
+    if (!(c instanceof CCC)) return "fail instanceof CCC"
+
+    var cc = new CCC();
+
+    if (cc.bux() != 64) return "fail new CCC()";
+
+    if (kotlin_lib2.prop != "kek") return "fail prop";
+
+    if (kotlin_lib2.dep().bee() != "beedep") return "fail beedep";
+
+    if (main.test() != "OK") return "fail 1";
+
+    return kotlin_lib1.O() + kotlin_lib2.K();
+}