[JS] Add basic optional logs to test runner

js/js.tests/test/org/jetbrains/kotlin/js/test/BasicBoxTest.kt

@@ -96,6 +96,9 @@ abstract class BasicBoxTest(
 
     protected open val testChecker get() = if (runTestInNashorn) NashornJsTestChecker else V8JsTestChecker
 
+    protected val logger = KotlinJsTestLogger()
+
+
     fun doTest(filePath: String) {
         doTestWithIgnoringByFailFile(filePath, coroutinesPackage = "")
     }
@@ -119,6 +122,9 @@ abstract class BasicBoxTest(
 
     open fun doTest(filePath: String, expectedResult: String, mainCallParameters: MainCallParameters, coroutinesPackage: String = "") {
         val file = File(filePath)
+
+        logger.logFile("Test file", file)
+
         val outputDir = getOutputDir(file)
         val dceOutputDir = getOutputDir(file, testGroupOutputDirForMinification)
         val pirOutputDir = getOutputDir(file, testGroupOutputDirForPir)
@@ -188,6 +194,8 @@ abstract class BasicBoxTest(
                 val dceOutputFileName = module.outputFileName(dceOutputDir) + ".js"
                 val pirOutputFileName = module.outputFileName(pirOutputDir) + ".js"
                 val isMainModule = mainModuleName == module.name
+
+                logger.logFile("Output JS", File(outputFileName))
                 generateJavaScriptFile(
                     testFactory.tmpDir,
                     file.parent,
@@ -1115,3 +1123,13 @@ fun KotlinTestWithEnvironment.createPsiFile(fileName: String): KtFile {
 }
 
 fun KotlinTestWithEnvironment.createPsiFiles(fileNames: List<String>): List<KtFile> = fileNames.map(this::createPsiFile)
+
+class KotlinJsTestLogger {
+    val verbose = getBoolean("kotlin.js.test.verbose")
+
+    fun logFile(description: String, file: File) {
+        if (verbose) {
+            println("TEST_LOG: $description file://${file.absolutePath}")
+        }
+    }
+}

js/js.tests/test/org/jetbrains/kotlin/js/test/BasicIrBoxTest.kt

@@ -110,12 +110,14 @@ abstract class BasicIrBoxTest(
         }
 
         if (isMainModule) {
+            logger.logFile("Output JS", outputFile)
+
             val debugMode = getBoolean("kotlin.js.debugMode")
 
             val phaseConfig = if (debugMode) {
                 val allPhasesSet = jsPhases.toPhaseMap().values.toSet()
                 val dumpOutputDir = File(outputFile.parent, outputFile.nameWithoutExtension + "-irdump")
-                println("\n ------ Dumping phases to file://$dumpOutputDir")
+                logger.logFile("Dumping phasesTo", dumpOutputDir)
                 PhaseConfig(
                     jsPhases,
                     dumpToDirectory = dumpOutputDir.path,
@@ -150,8 +152,9 @@ abstract class BasicIrBoxTest(
                 compiledModule.dceJsCode?.writeTo(dceOutputFile, config)
 
                 if (generateDts) {
-                    val dtsFile = outputFile.withReplacedExtensionOrNull("_v5.js", ".d.ts")
-                    dtsFile?.write(compiledModule.tsDefinitions ?: error("No ts definitions"))
+                    val dtsFile = outputFile.withReplacedExtensionOrNull("_v5.js", ".d.ts")!!
+                    logger.logFile("Output d.ts", dtsFile)
+                    dtsFile.write(compiledModule.tsDefinitions ?: error("No ts definitions"))
                 }
             }
 
@@ -185,6 +188,8 @@ abstract class BasicIrBoxTest(
                 nopack = true
             )
 
+            logger.logFile("Output klib", File(actualOutputFile))
+
             compilationCache[outputFile.name.replace(".js", ".meta.js")] = actualOutputFile
         }
     }