Test runner: Report stacktraces for failed tests in TC messages

runtime/src/main/kotlin/kotlin/Throwable.kt

@@ -33,24 +33,33 @@ public open class Throwable(open val message: String?, open val cause: Throwable
 
     public fun getStackTrace(): Array<String> = stackTraceStrings
 
-    public fun printStackTrace() {
+    public fun printStackTrace(): Unit = dumpStackTrace { println(it) }
-        println(this.toString())
 
-        for (element in stackTraceStrings) {
+    internal fun dumpStackTrace(): String = buildString {
-            println("        at $element")
+        dumpStackTrace { appendln(it) }
+    }
+
+    private inline fun writeStackTraceElements(throwable: Throwable, writeln: (String) -> Unit) {
+        for (element in throwable.stackTraceStrings) {
+            writeln("        at $element")
         }
-
-        this.cause?.printEnclosedStackTrace(this)
     }
 
-    @Suppress("UNUSED_PARAMETER")
+    private inline fun dumpStackTrace(crossinline writeln: (String) -> Unit) {
-    private fun printEnclosedStackTrace(enclosing: Throwable) {
+        writeln(this@Throwable.toString())
-        // TODO: should skip common stack frames
+
-        print("Caused by: ")
+        writeStackTraceElements(this, writeln)
-        this.printStackTrace()
+
+        var cause = this.cause
+        while (cause != null) {
+            // TODO: should skip common stack frames
+            writeln("Caused by: $cause")
+            writeStackTraceElements(cause, writeln)
+            cause = cause.cause
+        }
     }
 
-    override public fun toString(): String {
+    public override fun toString(): String {
         val kClass = this::class
         val s = kClass.qualifiedName ?: kClass.simpleName ?: "Throwable"
         return if (message != null) s + ": " + message.toString() else s

runtime/src/main/kotlin/kotlin/native/internal/test/TeamCityLogger.kt

@@ -51,9 +51,9 @@ internal class TeamCityLogger : BaseTestLogger() {
 
     override fun pass(testCase: TestCase, timeMillis: Long) = finish(testCase, timeMillis)
     override fun fail(testCase: TestCase, e: Throwable, timeMillis: Long) {
-        // TODO: Add 'details=...' command with the stack trace (need to implement stacktrace dumping as a string)
+        val stackTrace = e.dumpStackTrace().escapeForTC()
-        e.printStackTrace()
+        val message = e.message?.escapeForTC()
-        report("testFailed name='${testCase.tcName}' message='${e.message?.escapeForTC()}'")
+        report("testFailed name='${testCase.tcName}' message='$message' details='$stackTrace'")
         finish(testCase, timeMillis)
     }
 

runtime/src/main/kotlin/kotlin/native/internal/test/TestSuite.kt

@@ -89,7 +89,7 @@ public abstract class BaseClassSuite<INSTANCE, COMPANION>(name: String, ignored:
         }
     }
 
-    // These two methods are overrided in test suite classes generated by the compiler.
+    // These two methods are overridden in test suite classes generated by the compiler.
     abstract fun createInstance(): INSTANCE
     open fun getCompanion(): COMPANION = throw NotImplementedError("Test class has no companion object")