code: // from gee.cs.oswego.edu/home/jsr166/jsr166
  
  package jsr166tests.tck;
  
  /*
   * Written by Doug Lea with assistance from members of JCP JSR-166
   * Expert Group and released to the public domain, as explained at
   * http://creativecommons.org/licenses/publicdomain
   * Other contributors include Andrew Wright, Jeffrey Hayes,
   * Pat Fisher, Mike Judd.
   */
  
  import junit.framework.*;
  
  import java.util.concurrent.*;
  import static java.util.concurrent.TimeUnit.MILLISECONDS;
  
  import java.security.*;
  
  /**
   * Base class for JSR166 Junit TCK tests.  Defines some constants,
   * utility methods and classes, as well as a simple framework for
   * helping to make sure that assertions failing in generated threads
   * cause the associated test that generated them to itself fail (which
   * JUnit does not otherwise arrange).  The rules for creating such
   * tests are:
   *
   * <ol>
   *
   * <li> All assertions in code running in generated threads must use
   * the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
   * #threadAssertEquals}, or {@link #threadAssertNull}, (not
   * <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
   * particularly recommended) for other code to use these forms too.
   * Only the most typically used JUnit assertion methods are defined
   * this way, but enough to live with.</li>
   *
   * <li> If you override {@link #setUp} or {@link #tearDown}, make sure
   * to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
   * them. These methods are used to clear and check for thread
   * assertion failures.</li>
   *
   * <li>All delays and timeouts must use one of the constants <tt>
   * SHORT_DELAY_MS</tt>, <tt> SMALL_DELAY_MS</tt>, <tt> MEDIUM_DELAY_MS</tt>,
   * <tt> LONG_DELAY_MS</tt>. The idea here is that a SHORT is always
   * discriminable from zero time, and always allows enough time for the
   * small amounts of computation (creating a thread, calling a few
   * methods, etc) needed to reach a timeout point. Similarly, a SMALL
   * is always discriminable as larger than SHORT and smaller than
   * MEDIUM.  And so on. These constants are set to conservative values,
   * but even so, if there is ever any doubt, they can all be increased
   * in one spot to rerun tests on slower platforms.</li>
   *
   * <li> All threads generated must be joined inside each test case
   * method (or <tt>fail</tt> to do so) before returning from the
   * method. The <tt> joinPool</tt> method can be used to do this when
   * using Executors.</li>
   *
   * </ol>
   *
   * <p> <b>Other notes</b>
   * <ul>
   *
   * <li> Usually, there is one testcase method per JSR166 method
   * covering "normal" operation, and then as many exception-testing
   * methods as there are exceptions the method can throw. Sometimes
   * there are multiple tests per JSR166 method when the different
   * "normal" behaviors differ significantly. And sometimes testcases
   * cover multiple methods when they cannot be tested in
   * isolation.</li>
   *
   * <li> The documentation style for testcases is to provide as javadoc
   * a simple sentence or two describing the property that the testcase
   * method purports to test. The javadocs do not say anything about how
   * the property is tested. To find out, read the code.</li>
   *
   * <li> These tests are "conformance tests", and do not attempt to
   * test throughput, latency, scalability or other performance factors
   * (see the separate "jtreg" tests for a set intended to check these
   * for the most central aspects of functionality.) So, most tests use
   * the smallest sensible numbers of threads, collection sizes, etc
   * needed to check basic conformance.</li>
   *
   * <li>The test classes currently do not declare inclusion in
   * any particular package to simplify things for people integrating
   * them in TCK test suites.</li>
   *
   * <li> As a convenience, the <tt>main</tt> of this class (JSR166TestCase)
   * runs all JSR166 unit tests.</li>
   *
   * </ul>
   */
  public class JSR166TestCase extends TestCase {
      /**
       * Runs all JSR166 unit tests using junit.textui.TestRunner
       */
      public static void main(String[] args) {
          int iters = 1;
          if (args.length > 0)
              iters = Integer.parseInt(args[0]);
          Test s = suite();
          for (int i = 0; i < iters; ++i) {
              junit.textui.TestRunner.run(s);
              System.gc();
              System.runFinalization();
          }
          System.exit(0);
      }
  
      /**
       * Collects all JSR166 unit tests as one suite
       */
      public static Test suite() {
          TestSuite suite = new TestSuite("JSR166 Unit Tests");
  
  //        suite.addTest(new TestSuite(ForkJoinPoolTest.class));
  //        suite.addTest(new TestSuite(ForkJoinTaskTest.class));
  //        suite.addTest(new TestSuite(RecursiveActionTest.class));
  //        suite.addTest(new TestSuite(RecursiveTaskTest.class));
  //        suite.addTest(new TestSuite(LinkedTransferQueueTest.class));
  //        suite.addTest(new TestSuite(PhaserTest.class));
  //        suite.addTest(new TestSuite(ThreadLocalRandomTest.class));
          suite.addTest(new TestSuite(AbstractExecutorServiceTest.class));
          suite.addTest(new TestSuite(AbstractQueueTest.class));
          suite.addTest(new TestSuite(AbstractQueuedSynchronizerTest.class));
          suite.addTest(new TestSuite(AbstractQueuedLongSynchronizerTest.class));
          suite.addTest(new TestSuite(ArrayBlockingQueueTest.class));
          suite.addTest(new TestSuite(ArrayDequeTest.class));
          suite.addTest(new TestSuite(AtomicBooleanTest.class));
          suite.addTest(new TestSuite(AtomicIntegerArrayTest.class));
          suite.addTest(new TestSuite(AtomicIntegerFieldUpdaterTest.class));
          suite.addTest(new TestSuite(AtomicIntegerTest.class));
          suite.addTest(new TestSuite(AtomicLongArrayTest.class));
          suite.addTest(new TestSuite(AtomicLongFieldUpdaterTest.class));
          suite.addTest(new TestSuite(AtomicLongTest.class));
          suite.addTest(new TestSuite(AtomicMarkableReferenceTest.class));
          suite.addTest(new TestSuite(AtomicReferenceArrayTest.class));
          suite.addTest(new TestSuite(AtomicReferenceFieldUpdaterTest.class));
          suite.addTest(new TestSuite(AtomicReferenceTest.class));
          suite.addTest(new TestSuite(AtomicStampedReferenceTest.class));
          suite.addTest(new TestSuite(ConcurrentHashMapTest.class));
          suite.addTest(new TestSuite(ConcurrentLinkedQueueTest.class));
          suite.addTest(new TestSuite(ConcurrentSkipListMapTest.class));
          suite.addTest(new TestSuite(SnapTreeMapTest.class));
          suite.addTest(new TestSuite(ConcurrentSkipListSubMapTest.class));
          suite.addTest(new TestSuite(SnapTreeSubMapTest.class));
          suite.addTest(new TestSuite(ConcurrentSkipListSetTest.class));
          suite.addTest(new TestSuite(ConcurrentSkipListSubSetTest.class));
          suite.addTest(new TestSuite(CopyOnWriteArrayListTest.class));
          suite.addTest(new TestSuite(CopyOnWriteArraySetTest.class));
          suite.addTest(new TestSuite(CountDownLatchTest.class));
          suite.addTest(new TestSuite(CyclicBarrierTest.class));
          suite.addTest(new TestSuite(DelayQueueTest.class));
          suite.addTest(new TestSuite(EntryTest.class));
          suite.addTest(new TestSuite(ExchangerTest.class));
          suite.addTest(new TestSuite(ExecutorsTest.class));
          suite.addTest(new TestSuite(ExecutorCompletionServiceTest.class));
          suite.addTest(new TestSuite(FutureTaskTest.class));
          suite.addTest(new TestSuite(LinkedBlockingDequeTest.class));
          suite.addTest(new TestSuite(LinkedBlockingQueueTest.class));
          suite.addTest(new TestSuite(LinkedListTest.class));
          suite.addTest(new TestSuite(LockSupportTest.class));
  //        suite.addTest(new TestSuite(PriorityBlockingQueueTest.class));
          suite.addTest(new TestSuite(PriorityQueueTest.class));
          suite.addTest(new TestSuite(ReentrantLockTest.class));
          suite.addTest(new TestSuite(ReentrantReadWriteLockTest.class));
          suite.addTest(new TestSuite(ScheduledExecutorTest.class));
          suite.addTest(new TestSuite(ScheduledExecutorSubclassTest.class));
          suite.addTest(new TestSuite(SemaphoreTest.class));
          suite.addTest(new TestSuite(SynchronousQueueTest.class));
          suite.addTest(new TestSuite(SystemTest.class));
          suite.addTest(new TestSuite(ThreadLocalTest.class));
          suite.addTest(new TestSuite(ThreadPoolExecutorTest.class));
          suite.addTest(new TestSuite(ThreadPoolExecutorSubclassTest.class));
          suite.addTest(new TestSuite(ThreadTest.class));
          suite.addTest(new TestSuite(TimeUnitTest.class));
          suite.addTest(new TestSuite(TreeMapTest.class));
          suite.addTest(new TestSuite(TreeSetTest.class));
          suite.addTest(new TestSuite(TreeSubMapTest.class));
          suite.addTest(new TestSuite(TreeSubSetTest.class));
  
          return suite;
      }
  
  
      public static long SHORT_DELAY_MS;
      public static long SMALL_DELAY_MS;
      public static long MEDIUM_DELAY_MS;
      public static long LONG_DELAY_MS;
  
  
      /**
       * Returns the shortest timed delay. This could
       * be reimplemented to use for example a Property.
       */
      protected long getShortDelay() {
          return 50;
      }
  
  
      /**
       * Sets delays as multiples of SHORT_DELAY.
       */
      protected void setDelays() {
          SHORT_DELAY_MS = getShortDelay();
          SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
          MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
          LONG_DELAY_MS = SHORT_DELAY_MS * 50;
      }
  
      /**
       * Flag set true if any threadAssert methods fail
       */
      volatile boolean threadFailed;
  
      /**
       * Initializes test to indicate that no thread assertions have failed
       */
      public void setUp() {
          setDelays();
          threadFailed = false;
      }
  
      /**
       * Triggers test case failure if any thread assertions have failed
       */
      public void tearDown() {
          assertFalse(threadFailed);
      }
  
      /**
       * Fail, also setting status to indicate current testcase should fail
       */
      public void threadFail(String reason) {
          threadFailed = true;
          fail(reason);
      }
  
      /**
       * If expression not true, set status to indicate current testcase
       * should fail
       */
      public void threadAssertTrue(boolean b) {
          if (!b) {
              threadFailed = true;
              assertTrue(b);
          }
      }
  
      /**
       * If expression not false, set status to indicate current testcase
       * should fail
       */
      public void threadAssertFalse(boolean b) {
          if (b) {
              threadFailed = true;
              assertFalse(b);
          }
      }
  
      /**
       * If argument not null, set status to indicate current testcase
       * should fail
       */
      public void threadAssertNull(Object x) {
          if (x != null) {
              threadFailed = true;
              assertNull(x);
          }
      }
  
      /**
       * If arguments not equal, set status to indicate current testcase
       * should fail
       */
      public void threadAssertEquals(long x, long y) {
          if (x != y) {
              threadFailed = true;
              assertEquals(x, y);
          }
      }
  
      /**
       * If arguments not equal, set status to indicate current testcase
       * should fail
       */
      public void threadAssertEquals(Object x, Object y) {
          if (x != y && (x == null || !x.equals(y))) {
              threadFailed = true;
              assertEquals(x, y);
          }
      }
  
      /**
       * threadFail with message "should throw exception"
       */
      public void threadShouldThrow() {
          threadFailed = true;
          fail("should throw exception");
      }
  
      /**
       * threadFail with message "should throw" + exceptionName
       */
      public void threadShouldThrow(String exceptionName) {
          threadFailed = true;
          fail("should throw " + exceptionName);
      }
  
      /**
       * threadFail with message "Unexpected exception"
       */
      public void threadUnexpectedException() {
          threadFailed = true;
          fail("Unexpected exception");
      }
  
      /**
       * threadFail with message "Unexpected exception", with argument
       */
      public void threadUnexpectedException(Throwable ex) {
          threadFailed = true;
          ex.printStackTrace();
          fail("Unexpected exception: " + ex);
      }
  
      /**
       * Wait out termination of a thread pool or fail doing so
       */
      public void joinPool(ExecutorService exec) {
          try {
              exec.shutdown();
              assertTrue(exec.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
          } catch (SecurityException ok) {
              // Allowed in case test doesn't have privs
          } catch (InterruptedException ie) {
              fail("Unexpected InterruptedException");
          }
      }
  
  
      /**
       * fail with message "should throw exception"
       */
      public void shouldThrow() {
          fail("Should throw exception");
      }
  
      /**
       * fail with message "should throw " + exceptionName
       */
      public void shouldThrow(String exceptionName) {
          fail("Should throw " + exceptionName);
      }
  
      /**
       * fail with message "Unexpected exception"
       */
      public void unexpectedException() {
          fail("Unexpected exception");
      }
  
      /**
       * fail with message "Unexpected exception", with argument
       */
      public void unexpectedException(Throwable ex) {
          ex.printStackTrace();
          fail("Unexpected exception: " + ex);
      }
  
  
      /**
       * The number of elements to place in collections, arrays, etc.
       */
      public static final int SIZE = 20;
  
      // Some convenient Integer constants
  
      public static final Integer zero  = new Integer(0);
      public static final Integer one   = new Integer(1);
      public static final Integer two   = new Integer(2);
      public static final Integer three = new Integer(3);
      public static final Integer four  = new Integer(4);
      public static final Integer five  = new Integer(5);
      public static final Integer six   = new Integer(6);
      public static final Integer seven = new Integer(7);
      public static final Integer eight = new Integer(8);
      public static final Integer nine  = new Integer(9);
      public static final Integer m1  = new Integer(-1);
      public static final Integer m2  = new Integer(-2);
      public static final Integer m3  = new Integer(-3);
      public static final Integer m4  = new Integer(-4);
      public static final Integer m5  = new Integer(-5);
      public static final Integer m6  = new Integer(-6);
      public static final Integer m10 = new Integer(-10);
  
  
      /**
       * A security policy where new permissions can be dynamically added
       * or all cleared.
       */
      public static class AdjustablePolicy extends java.security.Policy {
          Permissions perms = new Permissions();
          AdjustablePolicy() { }
          void addPermission(Permission perm) { perms.add(perm); }
          void clearPermissions() { perms = new Permissions(); }
          public PermissionCollection getPermissions(CodeSource cs) {
              return perms;
          }
          public PermissionCollection getPermissions(ProtectionDomain pd) {
              return perms;
          }
          public boolean implies(ProtectionDomain pd, Permission p) {
              return perms.implies(p);
          }
          public void refresh() {}
      }
  
      /**
       * Sleep until the timeout has elapsed, or interrupted.
       * Does <em>NOT</em> throw InterruptedException.
       */
      void sleepTillInterrupted(long timeoutMillis) {
          try {
              Thread.sleep(timeoutMillis);
          } catch (InterruptedException wakeup) {}
      }
  
      /**
       * Returns a new started Thread running the given runnable.
       */
      Thread newStartedThread(Runnable runnable) {
          Thread t = new Thread(runnable);
          t.start();
          return t;
      }
  
      // Some convenient Runnable classes
  
      public abstract class CheckedRunnable implements Runnable {
          protected abstract void realRun() throws Throwable;
  
          public final void run() {
              try {
                  realRun();
              } catch (Throwable t) {
                  threadUnexpectedException(t);
              }
          }
      }
  
      public abstract class RunnableShouldThrow implements Runnable {
          protected abstract void realRun() throws Throwable;
  
          final Class<?> exceptionClass;
  
          <T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
              this.exceptionClass = exceptionClass;
          }
  
          public final void run() {
              try {
                  realRun();
                  threadShouldThrow(exceptionClass.getSimpleName());
              } catch (Throwable t) {
                  if (! exceptionClass.isInstance(t))
                      threadUnexpectedException(t);
              }
          }
      }
  
      public abstract class ThreadShouldThrow extends Thread {
          protected abstract void realRun() throws Throwable;
  
          final Class<?> exceptionClass;
  
          <T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
              this.exceptionClass = exceptionClass;
          }
  
          public final void run() {
              try {
                  realRun();
                  threadShouldThrow(exceptionClass.getSimpleName());
              } catch (Throwable t) {
                  if (! exceptionClass.isInstance(t))
                      threadUnexpectedException(t);
              }
          }
      }
  
      public abstract class CheckedInterruptedRunnable implements Runnable {
          protected abstract void realRun() throws Throwable;
  
          public final void run() {
              try {
                  realRun();
                  threadShouldThrow("InterruptedException");
              } catch (InterruptedException success) {
              } catch (Throwable t) {
                  threadUnexpectedException(t);
              }
          }
      }
  
      public abstract class CheckedCallable<T> implements Callable<T> {
          protected abstract T realCall() throws Throwable;
  
          public final T call() {
              try {
                  return realCall();
              } catch (Throwable t) {
                  threadUnexpectedException(t);
              }
              return null;
          }
      }
  
      public abstract class CheckedInterruptedCallable<T> implements Callable<T> {
          protected abstract T realCall() throws Throwable;
  
          public final T call() {
              try {
                  T result = realCall();
                  threadShouldThrow("InterruptedException");
                  return result;
              } catch (InterruptedException success) {
              } catch (Throwable t) {
                  threadUnexpectedException(t);
              }
              return null;
          }
      }
  
      public static class NoOpRunnable implements Runnable {
          public void run() {}
      }
  
      public static class NoOpCallable implements Callable {
          public Object call() { return Boolean.TRUE; }
      }
  
      public static final String TEST_STRING = "a test string";
  
      public static class StringTask implements Callable<String> {
          public String call() { return TEST_STRING; }
      }
  
      public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
          return new CheckedCallable<String>() {
              public String realCall() {
                  try {
                      latch.await();
                  } catch (InterruptedException quittingTime) {}
                  return TEST_STRING;
              }};
      }
  
      public static class NPETask implements Callable<String> {
          public String call() { throw new NullPointerException(); }
      }
  
      public static class CallableOne implements Callable<Integer> {
          public Integer call() { return one; }
      }
  
      public class ShortRunnable extends CheckedRunnable {
          protected void realRun() throws Throwable {
              Thread.sleep(SHORT_DELAY_MS);
          }
      }
  
      public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
          protected void realRun() throws InterruptedException {
              Thread.sleep(SHORT_DELAY_MS);
          }
      }
  
      public class SmallRunnable extends CheckedRunnable {
          protected void realRun() throws Throwable {
              Thread.sleep(SMALL_DELAY_MS);
          }
      }
  
      public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
          protected void realRun() {
              try {
                  Thread.sleep(SMALL_DELAY_MS);
              } catch (InterruptedException ok) {}
          }
      }
  
      public class SmallCallable extends CheckedCallable {
          protected Object realCall() throws InterruptedException {
              Thread.sleep(SMALL_DELAY_MS);
              return Boolean.TRUE;
          }
      }
  
      public class SmallInterruptedRunnable extends CheckedInterruptedRunnable {
          protected void realRun() throws InterruptedException {
              Thread.sleep(SMALL_DELAY_MS);
          }
      }
  
      public class MediumRunnable extends CheckedRunnable {
          protected void realRun() throws Throwable {
              Thread.sleep(MEDIUM_DELAY_MS);
          }
      }
  
      public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
          protected void realRun() throws InterruptedException {
              Thread.sleep(MEDIUM_DELAY_MS);
          }
      }
  
      public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
          protected void realRun() {
              try {
                  Thread.sleep(MEDIUM_DELAY_MS);
              } catch (InterruptedException ok) {}
          }
      }
  
      public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
          protected void realRun() {
              try {
                  Thread.sleep(LONG_DELAY_MS);
              } catch (InterruptedException ok) {}
          }
      }
  
      /**
       * For use as ThreadFactory in constructors
       */
      public static class SimpleThreadFactory implements ThreadFactory {
          public Thread newThread(Runnable r) {
              return new Thread(r);
          }
      }
  
      public static class TrackedShortRunnable implements Runnable {
          public volatile boolean done = false;
          public void run() {
              try {
                  Thread.sleep(SMALL_DELAY_MS);
                  done = true;
              } catch (InterruptedException ok) {}
          }
      }
  
      public static class TrackedMediumRunnable implements Runnable {
          public volatile boolean done = false;
          public void run() {
              try {
                  Thread.sleep(MEDIUM_DELAY_MS);
                  done = true;
              } catch (InterruptedException ok) {}
          }
      }
  
      public static class TrackedLongRunnable implements Runnable {
          public volatile boolean done = false;
          public void run() {
              try {
                  Thread.sleep(LONG_DELAY_MS);
                  done = true;
              } catch (InterruptedException ok) {}
          }
      }
  
      public static class TrackedNoOpRunnable implements Runnable {
          public volatile boolean done = false;
          public void run() {
              done = true;
          }
      }
  
      public static class TrackedCallable implements Callable {
          public volatile boolean done = false;
          public Object call() {
              try {
                  Thread.sleep(SMALL_DELAY_MS);
                  done = true;
              } catch (InterruptedException ok) {}
              return Boolean.TRUE;
          }
      }
  
  
      /**
       * For use as RejectedExecutionHandler in constructors
       */
      public static class NoOpREHandler implements RejectedExecutionHandler {
          public void rejectedExecution(Runnable r,
                                        ThreadPoolExecutor executor) {}
      }
  
  }
  