From 1eff7b6369db72e2712a0c8d73849175c38bde2d Mon Sep 17 00:00:00 2001
From: Matthias Otterbach <matthias.otterbach@bsi-software.com>
Date: Wed, 26 Apr 2023 16:28:10 +0200
Subject: [PATCH] Print stack trace for timed-out tests (of timed-out thread)

---
 .../statement/TimeoutRunContextStatement.java | 47 +++++++++++++++++--
 1 file changed, 44 insertions(+), 3 deletions(-)

diff --git a/org.eclipse.scout.rt.platform.test/src/main/java/org/eclipse/scout/rt/testing/platform/runner/statement/TimeoutRunContextStatement.java b/org.eclipse.scout.rt.platform.test/src/main/java/org/eclipse/scout/rt/testing/platform/runner/statement/TimeoutRunContextStatement.java
index 95c69378124..bd971877d0d 100644
--- a/org.eclipse.scout.rt.platform.test/src/main/java/org/eclipse/scout/rt/testing/platform/runner/statement/TimeoutRunContextStatement.java
+++ b/org.eclipse.scout.rt.platform.test/src/main/java/org/eclipse/scout/rt/testing/platform/runner/statement/TimeoutRunContextStatement.java
@@ -1,9 +1,9 @@
 /*
- * Copyright (c) 2010-2017 BSI Business Systems Integration AG.
+ * Copyright (c) 2010-2023 BSI Business Systems Integration AG.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
- * http://www.eclipse.org/legal/epl-v10.html
+ * https://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     BSI Business Systems Integration AG - initial API and implementation
@@ -17,6 +17,7 @@
 import org.eclipse.scout.rt.platform.job.Jobs;
 import org.eclipse.scout.rt.platform.transaction.TransactionScope;
 import org.eclipse.scout.rt.platform.util.Assertions;
+import org.eclipse.scout.rt.platform.util.concurrent.IRunnable;
 import org.eclipse.scout.rt.platform.util.concurrent.ThreadInterruptedError;
 import org.eclipse.scout.rt.platform.util.concurrent.TimedOutError;
 import org.eclipse.scout.rt.testing.platform.runner.SafeStatementInvoker;
@@ -49,18 +50,58 @@ public TimeoutRunContextStatement(final Statement next, final long timeoutMillis
   @Override
   public void evaluate() throws Throwable {
     final SafeStatementInvoker invoker = new SafeStatementInvoker(m_next);
+    class TimeoutFutureRunnable implements IRunnable {
 
-    final IFuture<Void> future = Jobs.schedule(invoker, Jobs.newInput()
+      protected Thread m_thread;
+
+      @Override
+      public void run() throws Exception {
+        try {
+          m_thread = Thread.currentThread();
+          invoker.run();
+        }
+        finally {
+          m_thread = null;
+        }
+      }
+
+      public StackTraceElement[] getStackTrace() {
+        Thread t = m_thread;
+        if (t != null) {
+          return t.getStackTrace();
+        }
+        return new StackTraceElement[0];
+      }
+    }
+    final TimeoutFutureRunnable runnable = new TimeoutFutureRunnable();
+
+    final IFuture<Void> future = Jobs.schedule(runnable, Jobs.newInput()
         .withRunContext(RunContext.CURRENT.get().copy().withTransactionScope(TransactionScope.REQUIRES_NEW)) // Run in new TX, because the same TX is not allowed to be used by multiple threads.
         .withName("Running test with support for JUnit timeout"));
     try {
       future.awaitDone(m_timeoutMillis, TimeUnit.MILLISECONDS);
     }
     catch (ThreadInterruptedError | TimedOutError e) { // NOSONAR
+      StackTraceElement[] stackTrace = runnable.getStackTrace();
       future.cancel(true);
+      printStackTrace(stackTrace);
       throw new TestTimedOutException(m_timeoutMillis, TimeUnit.MILLISECONDS); // JUnit timeout exception
     }
 
     invoker.throwOnError();
   }
+
+  protected void printStackTrace(StackTraceElement[] stackTrace) {
+    StringBuilder trace = new StringBuilder();
+    for (StackTraceElement traceElement : stackTrace) {
+      if (trace.length() != 0) {
+        trace.append('\n');
+      }
+      trace.append("\tat ");
+      trace.append(traceElement);
+    }
+    if (trace.length() > 0) {
+      System.err.println("Test timed out at " + trace);
+    }
+  }
 }