// Copyright 2010 The Bazel Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package com.google.testing.junit.runner.testbed;

import java.util.concurrent.TimeUnit;
import junit.framework.TestCase;

/**
 * This is a testbed for testing stack trace functionality. Failures in this test should not cause
 * continuous builds to go red.
 */
public class StackTraceExercises extends TestCase {

  /** Succeeds fast but leaves behind a devious shutdown hook designed to wreak havoc. */
  public void testSneakyShutdownHook() {
    Runtime.getRuntime().addShutdownHook(new Thread(StackTraceExercises::handleHook));
  }

  private static void handleHook() {
    try {
      System.out.println("Entered shutdown hook");
      System.out.flush();
      Thread.ofVirtual()
          .name("my-virtual-thread")
          .start(
              () -> {
                try {
                  TimeUnit.HOURS.sleep(1);
                } catch (InterruptedException e) {
                  System.out.println("Virtual thread interrupted");
                  System.out.flush();
                }
              });
      Fifo.waitUntilDataAvailable();
      Thread.sleep(15000);
    } catch (Exception e) {
      throw new Error(e);
    }
  }

  /** A test which invokes System.exit(0). Bad test! */
  public void testNotSoFastBuddy() {
    System.out.println("Hey, not so fast there");
    System.exit(0);
  }
}
