[K/JS] Add a secret system property to enable the old Kotlin/JS compiler only for tests until it will be removed from the sources

compiler/tests/org/jetbrains/kotlin/cli/AnalysisHandlerExtensionTest.kt

@@ -11,6 +11,7 @@ import com.intellij.mock.MockProject
 import com.intellij.openapi.project.Project
 import org.jetbrains.kotlin.analyzer.AnalysisResult
 import org.jetbrains.kotlin.cli.common.CLITool
+import org.jetbrains.kotlin.cli.common.CompilerSystemProperties
 import org.jetbrains.kotlin.cli.common.ExitCode
 import org.jetbrains.kotlin.cli.js.K2JSCompiler
 import org.jetbrains.kotlin.cli.jvm.K2JVMCompiler
@@ -70,6 +71,12 @@ class AnalysisHandlerExtensionTest : TestCaseWithTmpdir() {
             listOf("-Xuse-deprecated-legacy-compiler", "-output", tmpdir.resolve("out.js").absolutePath)
         else
             listOf("-d", tmpdir.resolve("out").absolutePath)
+
+        if (compiler is K2JSCompiler) {
+            // TODO: It will be deleted after all of our internal vendors will use the new Kotlin/JS compiler
+            CompilerSystemProperties.KOTLIN_JS_COMPILER_LEGACY_FORCE_ENABLED.value = "true"
+        }
+
         val (output, exitCode) = CompilerTestUtil.executeCompiler(compiler, args + outputPath + extras)
         assertEquals(expectedExitCode, exitCode, output)
     }

compiler/tests/org/jetbrains/kotlin/cli/LauncherScriptTest.kt

@@ -18,6 +18,7 @@ package org.jetbrains.kotlin.cli
 
 import com.intellij.openapi.util.SystemInfo
 import com.intellij.openapi.util.text.StringUtil
+import org.jetbrains.kotlin.cli.common.CompilerSystemProperties
 import org.jetbrains.kotlin.cli.common.ExitCode
 import org.jetbrains.kotlin.cli.jvm.K2JVMCompiler
 import org.jetbrains.kotlin.test.KotlinTestUtils
@@ -142,7 +143,12 @@ class LauncherScriptTest : TestCaseWithTmpdir() {
         runProcess(
             "kotlinc-js",
             "$testDataDirectory/emptyMain.kt",
-            "-Xlegacy-deprecated-no-warn", "-Xuse-deprecated-legacy-compiler", "-output", File(tmpdir, "out.js").path
+            "-nowarn",
+            "-Xlegacy-deprecated-no-warn",
+            "-Xuse-deprecated-legacy-compiler",
+            "-D${CompilerSystemProperties.KOTLIN_JS_COMPILER_LEGACY_FORCE_ENABLED.property}=true",
+            "-output",
+            File(tmpdir, "out.js").path,
         )
     }
 

compiler/tests/org/jetbrains/kotlin/jvm/compiler/CompileKotlinAgainstCustomBinariesTest.kt

@@ -7,6 +7,7 @@ package org.jetbrains.kotlin.jvm.compiler
 
 import com.intellij.openapi.util.io.FileUtil
 import org.jetbrains.kotlin.cli.common.CLICompiler
+import org.jetbrains.kotlin.cli.common.CompilerSystemProperties
 import org.jetbrains.kotlin.cli.common.ExitCode
 import org.jetbrains.kotlin.cli.common.messages.AnalyzerWithCompilerReport
 import org.jetbrains.kotlin.cli.common.messages.MessageRenderer
@@ -101,7 +102,13 @@ class CompileKotlinAgainstCustomBinariesTest : AbstractKotlinCompilerIntegration
 
     private fun doTestKotlinLibraryWithWrongMetadataVersionJs(libraryName: String, vararg additionalOptions: String) {
         val library = compileJsLibrary(libraryName, additionalOptions = listOf("-Xmetadata-version=42.0.0"))
-        compileKotlin("source.kt", File(tmpdir, "usage.js"), listOf(library), K2JSCompiler(), additionalOptions.toList())
+        compileKotlin(
+            "source.kt",
+            File(tmpdir, "usage.js"),
+            listOf(library),
+            K2JSCompiler(),
+            additionalOptions.toList()
+        )
     }
 
     private fun doTestPreReleaseKotlinLibrary(
@@ -130,6 +137,11 @@ class CompileKotlinAgainstCustomBinariesTest : AbstractKotlinCompilerIntegration
                 else -> throw UnsupportedOperationException(compiler.toString())
             }
 
+        if (compiler is K2JSCompiler) {
+            // TODO: It will be deleted after all of our internal vendors will use the new Kotlin/JS compiler
+            CompilerSystemProperties.KOTLIN_JS_COMPILER_LEGACY_FORCE_ENABLED.value = "true"
+        }
+
         compileKotlin(
             "source.kt", usageDestination, listOf(result), compiler,
             additionalOptions.toList() + listOf("-language-version", LanguageVersion.LATEST_STABLE.versionString)
@@ -590,7 +602,12 @@ class CompileKotlinAgainstCustomBinariesTest : AbstractKotlinCompilerIntegration
     }
 
     fun testInternalFromForeignModuleJs() {
-        compileKotlin("source.kt", File(tmpdir, "usage.js"), listOf(compileJsLibrary("library")), K2JSCompiler())
+        compileKotlin(
+            "source.kt",
+            File(tmpdir, "usage.js"),
+            listOf(compileJsLibrary("library")),
+            K2JSCompiler(),
+        )
     }
 
     fun testInternalFromFriendModuleJs() {

compiler/tests/org/jetbrains/kotlin/multiplatform/AbstractMultiPlatformIntegrationTest.kt

@@ -18,6 +18,7 @@ package org.jetbrains.kotlin.multiplatform
 
 import org.jetbrains.kotlin.cli.AbstractCliTest
 import org.jetbrains.kotlin.cli.common.CLICompiler
+import org.jetbrains.kotlin.cli.common.CompilerSystemProperties
 import org.jetbrains.kotlin.cli.js.K2JSCompiler
 import org.jetbrains.kotlin.cli.jvm.K2JVMCompiler
 import org.jetbrains.kotlin.cli.metadata.K2MetadataCompiler
@@ -65,6 +66,8 @@ abstract class AbstractMultiPlatformIntegrationTest : KtUsefulTestCase() {
             if (jsSrc != null) {
                 appendLine()
                 appendLine("-- JS --")
+                // TODO: It will be deleted after all of our internal vendors will use the new Kotlin/JS compiler
+                CompilerSystemProperties.KOTLIN_JS_COMPILER_LEGACY_FORCE_ENABLED.value = "true"
                 appendLine(K2JSCompiler().compile(jsSrc, commonSrc, "-Xuse-deprecated-legacy-compiler", "-output", jsDest!!))
             }