[ViewVC] Diff of: jsr166/jsr166/src/test/tck/JSR166TestCase.java

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.53 by jsr166, Thu Sep 16 00:52:49 2010 UTC vs.
Revision 1.242 by jsr166, Mon Feb 19 16:12:11 2018 UTC

+/*
-<
+ * 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
->
+ * Written by Doug Lea and Martin Buchholz with assistance from
->
+ * members of JCP JSR-166 Expert Group and released to the public
->
+ * domain, as explained at
->
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ * Other contributors include Andrew Wright, Jeffrey Hayes,
+ * Pat Fisher, Mike Judd.
+ */
-<
+import junit.framework.*;
-<
+import java.util.PropertyPermission;
-<
+import java.util.concurrent.*;
-<
+import java.util.concurrent.atomic.AtomicReference;
->
+/*
->
+ * @test
->
+ * @summary JSR-166 tck tests, in a number of variations.
->
+ *          The first is the conformance testing variant,
->
+ *          while others also test implementation details.
->
+ * @build *
->
+ * @modules java.management
->
+ * @run junit/othervm/timeout=1000 JSR166TestCase
->
+ * @run junit/othervm/timeout=1000
->
+ *      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
->
+ *      --add-opens java.base/java.lang=ALL-UNNAMED
->
+ *      -Djsr166.testImplementationDetails=true
->
+ *      JSR166TestCase
->
+ * @run junit/othervm/timeout=1000
->
+ *      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
->
+ *      --add-opens java.base/java.lang=ALL-UNNAMED
->
+ *      -Djsr166.testImplementationDetails=true
->
+ *      -Djava.util.concurrent.ForkJoinPool.common.parallelism=0
->
+ *      JSR166TestCase
->
+ * @run junit/othervm/timeout=1000
->
+ *      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
->
+ *      --add-opens java.base/java.lang=ALL-UNNAMED
->
+ *      -Djsr166.testImplementationDetails=true
->
+ *      -Djava.util.concurrent.ForkJoinPool.common.parallelism=1
->
+ *      -Djava.util.secureRandomSeed=true
->
+ *      JSR166TestCase
->
+ * @run junit/othervm/timeout=1000/policy=tck.policy
->
+ *      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
->
+ *      --add-opens java.base/java.lang=ALL-UNNAMED
->
+ *      -Djsr166.testImplementationDetails=true
->
+ *      JSR166TestCase
->
+ */
->
+import static java.util.concurrent.TimeUnit.MILLISECONDS;
-+
+import static java.util.concurrent.TimeUnit.MINUTES;
-+
+import static java.util.concurrent.TimeUnit.NANOSECONDS;
-+
-+
+import java.io.ByteArrayInputStream;
-+
+import java.io.ByteArrayOutputStream;
-+
+import java.io.ObjectInputStream;
-+
+import java.io.ObjectOutputStream;
-+
+import java.lang.management.ManagementFactory;
-+
+import java.lang.management.ThreadInfo;
-+
+import java.lang.management.ThreadMXBean;
-+
+import java.lang.reflect.Constructor;
-+
+import java.lang.reflect.Method;
-+
+import java.lang.reflect.Modifier;
+import java.security.CodeSource;
+import java.security.Permission;
+import java.security.PermissionCollection;
+import java.security.Policy;
+import java.security.ProtectionDomain;
+import java.security.SecurityPermission;
-+
+import java.util.ArrayList;
-+
+import java.util.Arrays;
-+
+import java.util.Collection;
-+
+import java.util.Collections;
-+
+import java.util.Date;
-+
+import java.util.Enumeration;
-+
+import java.util.Iterator;
-+
+import java.util.List;
-+
+import java.util.NoSuchElementException;
-+
+import java.util.PropertyPermission;
-+
+import java.util.concurrent.BlockingQueue;
-+
+import java.util.concurrent.Callable;
-+
+import java.util.concurrent.CountDownLatch;
-+
+import java.util.concurrent.CyclicBarrier;
-+
+import java.util.concurrent.ExecutionException;
-+
+import java.util.concurrent.Executor;
-+
+import java.util.concurrent.Executors;
-+
+import java.util.concurrent.ExecutorService;
-+
+import java.util.concurrent.ForkJoinPool;
-+
+import java.util.concurrent.Future;
-+
+import java.util.concurrent.FutureTask;
-+
+import java.util.concurrent.RecursiveAction;
-+
+import java.util.concurrent.RecursiveTask;
-+
+import java.util.concurrent.RejectedExecutionException;
-+
+import java.util.concurrent.RejectedExecutionHandler;
-+
+import java.util.concurrent.Semaphore;
-+
+import java.util.concurrent.ScheduledExecutorService;
-+
+import java.util.concurrent.ScheduledFuture;
-+
+import java.util.concurrent.SynchronousQueue;
-+
+import java.util.concurrent.ThreadFactory;
-+
+import java.util.concurrent.ThreadLocalRandom;
-+
+import java.util.concurrent.ThreadPoolExecutor;
-+
+import java.util.concurrent.TimeUnit;
-+
+import java.util.concurrent.TimeoutException;
-+
+import java.util.concurrent.atomic.AtomicBoolean;
-+
+import java.util.concurrent.atomic.AtomicReference;
-+
+import java.util.regex.Pattern;
-+
-+
+import junit.framework.Test;
-+
+import junit.framework.TestCase;
-+
+import junit.framework.TestResult;
-+
+import junit.framework.TestSuite;
+/**
+ * Base class for JSR166 Junit TCK tests.  Defines some constants,
+ * <ol>
-<
+ * <li> All assertions in code running in generated threads must use
->
+ * <li>All assertions in code running in generated threads must use
+ * the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
+ * #threadAssertEquals}, or {@link #threadAssertNull}, (not
+ * {@code fail}, {@code assertTrue}, 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>
->
+ * this way, but enough to live with.
-<
+ * <li> If you override {@link #setUp} or {@link #tearDown}, make sure
->
+ * <li>If you override {@link #setUp} or {@link #tearDown}, make sure
+ * to invoke {@code super.setUp} and {@code super.tearDown} within
+ * them. These methods are used to clear and check for thread
-<
+ * assertion failures.</li>
->
+ * assertion failures.
+ * <li>All delays and timeouts must use one of the constants {@code
+ * SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
+ * 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>
->
+ * in one spot to rerun tests on slower platforms.
-<
+ * <li> All threads generated must be joined inside each test case
->
+ * <li>All threads generated must be joined inside each test case
+ * method (or {@code fail} to do so) before returning from the
+ * method. The {@code joinPool} method can be used to do this when
-<
+ * using Executors.</li>
->
+ * using Executors.
+ * </ol>
-<
+ * <p> <b>Other notes</b>
->
+ * <p><b>Other notes</b>
+ * <ul>
-<
+ * <li> Usually, there is one testcase method per JSR166 method
->
+ * <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>
->
+ * cover multiple methods when they cannot be tested in isolation.
-<
+ * <li> The documentation style for testcases is to provide as javadoc
->
+ * <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>
->
+ * the property is tested. To find out, read the code.
-<
+ * <li> These tests are "conformance tests", and do not attempt to
->
+ * <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>
->
+ * needed to check basic conformance.
+ * <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>
->
+ * them in TCK test suites.
-<
+ * <li> As a convenience, the {@code main} of this class (JSR166TestCase)
-<
+ * runs all JSR166 unit tests.</li>
->
+ * <li>As a convenience, the {@code main} of this class (JSR166TestCase)
->
+ * runs all JSR166 unit tests.
+ * </ul>
+ */
+    private static final boolean useSecurityManager =
+        Boolean.getBoolean("jsr166.useSecurityManager");
-+
+    protected static final boolean expensiveTests =
-+
+        Boolean.getBoolean("jsr166.expensiveTests");
-+
-+
+    /**
-+
+     * If true, also run tests that are not part of the official tck
-+
+     * because they test unspecified implementation details.
-+
+     */
-+
+    protected static final boolean testImplementationDetails =
-+
+        Boolean.getBoolean("jsr166.testImplementationDetails");
-+
-+
+    /**
-+
+     * If true, report on stdout all "slow" tests, that is, ones that
-+
+     * take more than profileThreshold milliseconds to execute.
-+
+     */
-+
+    private static final boolean profileTests =
-+
+        Boolean.getBoolean("jsr166.profileTests");
-+
-+
+    /**
-+
+     * The number of milliseconds that tests are permitted for
-+
+     * execution without being reported, when profileTests is set.
-+
+     */
-+
+    private static final long profileThreshold =
-+
+        Long.getLong("jsr166.profileThreshold", 100);
-+
-+
+    /**
-+
+     * The number of repetitions per test (for tickling rare bugs).
-+
+     */
-+
+    private static final int runsPerTest =
-+
+        Integer.getInteger("jsr166.runsPerTest", 1);
-+
-+
+    /**
-+
+     * The number of repetitions of the test suite (for finding leaks?).
-+
+     */
-+
+    private static final int suiteRuns =
-+
+        Integer.getInteger("jsr166.suiteRuns", 1);
-+
+    /**
-<
+     * Runs all JSR166 unit tests using junit.textui.TestRunner
->
+     * Returns the value of the system property, or NaN if not defined.
->
+     */
->
+    private static float systemPropertyValue(String name) {
->
+        String floatString = System.getProperty(name);
->
+        if (floatString == null)
->
+            return Float.NaN;
->
+        try {
->
+            return Float.parseFloat(floatString);
->
+        } catch (NumberFormatException ex) {
->
+            throw new IllegalArgumentException(
->
+                String.format("Bad float value in system property %s=%s",
->
+                              name, floatString));
->
+        }
->
+    }
->
->
+    /**
->
+     * The scaling factor to apply to standard delays used in tests.
->
+     * May be initialized from any of:
->
+     * - the "jsr166.delay.factor" system property
->
+     * - the "test.timeout.factor" system property (as used by jtreg)
->
+     *   See: http://openjdk.java.net/jtreg/tag-spec.html
->
+     * - hard-coded fuzz factor when using a known slowpoke VM
->
+     */
->
+    private static final float delayFactor = delayFactor();
->
->
+    private static float delayFactor() {
->
+        float x;
->
+        if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
->
+            return x;
->
+        if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
->
+            return x;
->
+        String prop = System.getProperty("java.vm.version");
->
+        if (prop != null && prop.matches(".*debug.*"))
->
+            return 4.0f; // How much slower is fastdebug than product?!
->
+        return 1.0f;
->
+    }
->
->
+    public JSR166TestCase() { super(); }
->
+    public JSR166TestCase(String name) { super(name); }
->
->
+    /**
->
+     * A filter for tests to run, matching strings of the form
->
+     * methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
->
+     * Usefully combined with jsr166.runsPerTest.
->
+     */
->
+    private static final Pattern methodFilter = methodFilter();
->
->
+    private static Pattern methodFilter() {
->
+        String regex = System.getProperty("jsr166.methodFilter");
->
+        return (regex == null) ? null : Pattern.compile(regex);
->
+    }
->
->
+    // Instrumentation to debug very rare, but very annoying hung test runs.
->
+    static volatile TestCase currentTestCase;
->
+    // static volatile int currentRun = 0;
->
+    static {
->
+        Runnable checkForWedgedTest = new Runnable() { public void run() {
->
+            // Avoid spurious reports with enormous runsPerTest.
->
+            // A single test case run should never take more than 1 second.
->
+            // But let's cap it at the high end too ...
->
+            final int timeoutMinutes =
->
+                Math.min(15, Math.max(runsPerTest / 60, 1));
->
+            for (TestCase lastTestCase = currentTestCase;;) {
->
+                try { MINUTES.sleep(timeoutMinutes); }
->
+                catch (InterruptedException unexpected) { break; }
->
+                if (lastTestCase == currentTestCase) {
->
+                    System.err.printf(
->
+                        "Looks like we're stuck running test: %s%n",
->
+                        lastTestCase);
->
+//                     System.err.printf(
->
+//                         "Looks like we're stuck running test: %s (%d/%d)%n",
->
+//                         lastTestCase, currentRun, runsPerTest);
->
+//                     System.err.println("availableProcessors=" +
->
+//                         Runtime.getRuntime().availableProcessors());
->
+//                     System.err.printf("cpu model = %s%n", cpuModel());
->
+                    dumpTestThreads();
->
+                    // one stack dump is probably enough; more would be spam
->
+                    break;
->
+                }
->
+                lastTestCase = currentTestCase;
->
+            }}};
->
+        Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
->
+        thread.setDaemon(true);
->
+        thread.start();
->
+    }
->
->
+//     public static String cpuModel() {
->
+//         try {
->
+//             java.util.regex.Matcher matcher
->
+//               = Pattern.compile("model name\\s*: (.*)")
->
+//                 .matcher(new String(
->
+//                     java.nio.file.Files.readAllBytes(
->
+//                         java.nio.file.Paths.get("/proc/cpuinfo")), "UTF-8"));
->
+//             matcher.find();
->
+//             return matcher.group(1);
->
+//         } catch (Exception ex) { return null; }
->
+//     }
->
->
+    public void runBare() throws Throwable {
->
+        currentTestCase = this;
->
+        if (methodFilter == null
->
+            || methodFilter.matcher(toString()).find())
->
+            super.runBare();
->
+    }
->
->
+    protected void runTest() throws Throwable {
->
+        for (int i = 0; i < runsPerTest; i++) {
->
+            // currentRun = i;
->
+            if (profileTests)
->
+                runTestProfiled();
->
+            else
->
+                super.runTest();
->
+        }
->
+    }
->
->
+    protected void runTestProfiled() throws Throwable {
->
+        for (int i = 0; i < 2; i++) {
->
+            long startTime = System.nanoTime();
->
+            super.runTest();
->
+            long elapsedMillis = millisElapsedSince(startTime);
->
+            if (elapsedMillis < profileThreshold)
->
+                break;
->
+            // Never report first run of any test; treat it as a
->
+            // warmup run, notably to trigger all needed classloading,
->
+            if (i > 0)
->
+                System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
->
+        }
->
+    }
->
->
+    /**
->
+     * Runs all JSR166 unit tests using junit.textui.TestRunner.
+     */
+    public static void main(String[] args) {
-+
+        main(suite(), args);
-+
+    }
-+
-+
+    static class PithyResultPrinter extends junit.textui.ResultPrinter {
-+
+        PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
-+
+        long runTime;
-+
+        public void startTest(Test test) {}
-+
+        protected void printHeader(long runTime) {
-+
+            this.runTime = runTime; // defer printing for later
-+
+        }
-+
+        protected void printFooter(TestResult result) {
-+
+            if (result.wasSuccessful()) {
-+
+                getWriter().println("OK (" + result.runCount() + " tests)"
-+
+                    + "  Time: " + elapsedTimeAsString(runTime));
-+
+            } else {
-+
+                getWriter().println("Time: " + elapsedTimeAsString(runTime));
-+
+                super.printFooter(result);
-+
+            }
-+
+        }
-+
+    }
-+
-+
+    /**
-+
+     * Returns a TestRunner that doesn't bother with unnecessary
-+
+     * fluff, like printing a "." for each test case.
-+
+     */
-+
+    static junit.textui.TestRunner newPithyTestRunner() {
-+
+        junit.textui.TestRunner runner = new junit.textui.TestRunner();
-+
+        runner.setPrinter(new PithyResultPrinter(System.out));
-+
+        return runner;
-+
+    }
-+
-+
+    /**
-+
+     * Runs all unit tests in the given test suite.
-+
+     * Actual behavior influenced by jsr166.* system properties.
-+
+     */
-+
+    static void main(Test suite, String[] args) {
+        if (useSecurityManager) {
+            System.err.println("Setting a permissive security manager");
+            Policy.setPolicy(permissivePolicy());
+            System.setSecurityManager(new SecurityManager());
-<
+        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);
->
+        for (int i = 0; i < suiteRuns; i++) {
->
+            TestResult result = newPithyTestRunner().doRun(suite);
->
+            if (!result.wasSuccessful())
->
+                System.exit(1);
+            System.gc();
+            System.runFinalization();
-–
+        System.exit(0);
-+
+    public static TestSuite newTestSuite(Object... suiteOrClasses) {
-+
+        TestSuite suite = new TestSuite();
-+
+        for (Object suiteOrClass : suiteOrClasses) {
-+
+            if (suiteOrClass instanceof TestSuite)
-+
+                suite.addTest((TestSuite) suiteOrClass);
-+
+            else if (suiteOrClass instanceof Class)
-+
+                suite.addTest(new TestSuite((Class<?>) suiteOrClass));
-+
+            else
-+
+                throw new ClassCastException("not a test suite or class");
-+
+        }
-+
+        return suite;
-+
+    }
-+
-+
+    public static void addNamedTestClasses(TestSuite suite,
-+
+                                           String... testClassNames) {
-+
+        for (String testClassName : testClassNames) {
-+
+            try {
-+
+                Class<?> testClass = Class.forName(testClassName);
-+
+                Method m = testClass.getDeclaredMethod("suite");
-+
+                suite.addTest(newTestSuite((Test)m.invoke(null)));
-+
+            } catch (ReflectiveOperationException e) {
-+
+                throw new AssertionError("Missing test class", e);
-+
+            }
-+
+        }
-+
+    }
-+
-+
+    public static final double JAVA_CLASS_VERSION;
-+
+    public static final String JAVA_SPECIFICATION_VERSION;
-+
+    static {
-+
+        try {
-+
+            JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
-+
+                new java.security.PrivilegedAction<Double>() {
-+
+                public Double run() {
-+
+                    return Double.valueOf(System.getProperty("java.class.version"));}});
-+
+            JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
-+
+                new java.security.PrivilegedAction<String>() {
-+
+                public String run() {
-+
+                    return System.getProperty("java.specification.version");}});
-+
+        } catch (Throwable t) {
-+
+            throw new Error(t);
-+
+        }
-+
+    }
-+
-+
+    public static boolean atLeastJava6()  { return JAVA_CLASS_VERSION >= 50.0; }
-+
+    public static boolean atLeastJava7()  { return JAVA_CLASS_VERSION >= 51.0; }
-+
+    public static boolean atLeastJava8()  { return JAVA_CLASS_VERSION >= 52.0; }
-+
+    public static boolean atLeastJava9()  { return JAVA_CLASS_VERSION >= 53.0; }
-+
+    public static boolean atLeastJava10() { return JAVA_CLASS_VERSION >= 54.0; }
-+
+    /**
-<
+     * Collects all JSR166 unit tests as one suite
->
+     * 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(ConcurrentLinkedDequeTest.class));
-<
+        suite.addTest(new TestSuite(ConcurrentLinkedQueueTest.class));
-<
+        suite.addTest(new TestSuite(ConcurrentSkipListMapTest.class));
-<
+        suite.addTest(new TestSuite(ConcurrentSkipListSubMapTest.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));
->
+        // Java7+ test classes
->
+        TestSuite suite = newTestSuite(
->
+            ForkJoinPoolTest.suite(),
->
+            ForkJoinTaskTest.suite(),
->
+            RecursiveActionTest.suite(),
->
+            RecursiveTaskTest.suite(),
->
+            LinkedTransferQueueTest.suite(),
->
+            PhaserTest.suite(),
->
+            ThreadLocalRandomTest.suite(),
->
+            AbstractExecutorServiceTest.suite(),
->
+            AbstractQueueTest.suite(),
->
+            AbstractQueuedSynchronizerTest.suite(),
->
+            AbstractQueuedLongSynchronizerTest.suite(),
->
+            ArrayBlockingQueueTest.suite(),
->
+            ArrayDequeTest.suite(),
->
+            ArrayListTest.suite(),
->
+            AtomicBooleanTest.suite(),
->
+            AtomicIntegerArrayTest.suite(),
->
+            AtomicIntegerFieldUpdaterTest.suite(),
->
+            AtomicIntegerTest.suite(),
->
+            AtomicLongArrayTest.suite(),
->
+            AtomicLongFieldUpdaterTest.suite(),
->
+            AtomicLongTest.suite(),
->
+            AtomicMarkableReferenceTest.suite(),
->
+            AtomicReferenceArrayTest.suite(),
->
+            AtomicReferenceFieldUpdaterTest.suite(),
->
+            AtomicReferenceTest.suite(),
->
+            AtomicStampedReferenceTest.suite(),
->
+            ConcurrentHashMapTest.suite(),
->
+            ConcurrentLinkedDequeTest.suite(),
->
+            ConcurrentLinkedQueueTest.suite(),
->
+            ConcurrentSkipListMapTest.suite(),
->
+            ConcurrentSkipListSubMapTest.suite(),
->
+            ConcurrentSkipListSetTest.suite(),
->
+            ConcurrentSkipListSubSetTest.suite(),
->
+            CopyOnWriteArrayListTest.suite(),
->
+            CopyOnWriteArraySetTest.suite(),
->
+            CountDownLatchTest.suite(),
->
+            CountedCompleterTest.suite(),
->
+            CyclicBarrierTest.suite(),
->
+            DelayQueueTest.suite(),
->
+            EntryTest.suite(),
->
+            ExchangerTest.suite(),
->
+            ExecutorsTest.suite(),
->
+            ExecutorCompletionServiceTest.suite(),
->
+            FutureTaskTest.suite(),
->
+            LinkedBlockingDequeTest.suite(),
->
+            LinkedBlockingQueueTest.suite(),
->
+            LinkedListTest.suite(),
->
+            LockSupportTest.suite(),
->
+            PriorityBlockingQueueTest.suite(),
->
+            PriorityQueueTest.suite(),
->
+            ReentrantLockTest.suite(),
->
+            ReentrantReadWriteLockTest.suite(),
->
+            ScheduledExecutorTest.suite(),
->
+            ScheduledExecutorSubclassTest.suite(),
->
+            SemaphoreTest.suite(),
->
+            SynchronousQueueTest.suite(),
->
+            SystemTest.suite(),
->
+            ThreadLocalTest.suite(),
->
+            ThreadPoolExecutorTest.suite(),
->
+            ThreadPoolExecutorSubclassTest.suite(),
->
+            ThreadTest.suite(),
->
+            TimeUnitTest.suite(),
->
+            TreeMapTest.suite(),
->
+            TreeSetTest.suite(),
->
+            TreeSubMapTest.suite(),
->
+            TreeSubSetTest.suite(),
->
+            VectorTest.suite());
->
->
+        // Java8+ test classes
->
+        if (atLeastJava8()) {
->
+            String[] java8TestClassNames = {
->
+                "ArrayDeque8Test",
->
+                "Atomic8Test",
->
+                "CompletableFutureTest",
->
+                "ConcurrentHashMap8Test",
->
+                "CountedCompleter8Test",
->
+                "DoubleAccumulatorTest",
->
+                "DoubleAdderTest",
->
+                "ForkJoinPool8Test",
->
+                "ForkJoinTask8Test",
->
+                "HashMapTest",
->
+                "LinkedBlockingDeque8Test",
->
+                "LinkedBlockingQueue8Test",
->
+                "LongAccumulatorTest",
->
+                "LongAdderTest",
->
+                "SplittableRandomTest",
->
+                "StampedLockTest",
->
+                "SubmissionPublisherTest",
->
+                "ThreadLocalRandom8Test",
->
+                "TimeUnit8Test",
->
+            };
->
+            addNamedTestClasses(suite, java8TestClassNames);
->
+        }
->
->
+        // Java9+ test classes
->
+        if (atLeastJava9()) {
->
+            String[] java9TestClassNames = {
->
+                "AtomicBoolean9Test",
->
+                "AtomicInteger9Test",
->
+                "AtomicIntegerArray9Test",
->
+                "AtomicLong9Test",
->
+                "AtomicLongArray9Test",
->
+                "AtomicReference9Test",
->
+                "AtomicReferenceArray9Test",
->
+                "ExecutorCompletionService9Test",
->
+                "ForkJoinPool9Test",
->
+            };
->
+            addNamedTestClasses(suite, java9TestClassNames);
->
+        }
+        return suite;
-+
+    /** Returns list of junit-style test method names in given class. */
-+
+    public static ArrayList<String> testMethodNames(Class<?> testClass) {
-+
+        Method[] methods = testClass.getDeclaredMethods();
-+
+        ArrayList<String> names = new ArrayList<>(methods.length);
-+
+        for (Method method : methods) {
-+
+            if (method.getName().startsWith("test")
-+
+                && Modifier.isPublic(method.getModifiers())
-+
+                // method.getParameterCount() requires jdk8+
-+
+                && method.getParameterTypes().length == 0) {
-+
+                names.add(method.getName());
-+
+            }
-+
+        }
-+
+        return names;
-+
+    }
-+
-+
+    /**
-+
+     * Returns junit-style testSuite for the given test class, but
-+
+     * parameterized by passing extra data to each test.
-+
+     */
-+
+    public static <ExtraData> Test parameterizedTestSuite
-+
+        (Class<? extends JSR166TestCase> testClass,
-+
+         Class<ExtraData> dataClass,
-+
+         ExtraData data) {
-+
+        try {
-+
+            TestSuite suite = new TestSuite();
-+
+            Constructor c =
-+
+                testClass.getDeclaredConstructor(dataClass, String.class);
-+
+            for (String methodName : testMethodNames(testClass))
-+
+                suite.addTest((Test) c.newInstance(data, methodName));
-+
+            return suite;
-+
+        } catch (ReflectiveOperationException e) {
-+
+            throw new AssertionError(e);
-+
+        }
-+
+    }
-+
-+
+    /**
-+
+     * Returns junit-style testSuite for the jdk8 extension of the
-+
+     * given test class, but parameterized by passing extra data to
-+
+     * each test.  Uses reflection to allow compilation in jdk7.
-+
+     */
-+
+    public static <ExtraData> Test jdk8ParameterizedTestSuite
-+
+        (Class<? extends JSR166TestCase> testClass,
-+
+         Class<ExtraData> dataClass,
-+
+         ExtraData data) {
-+
+        if (atLeastJava8()) {
-+
+            String name = testClass.getName();
-+
+            String name8 = name.replaceAll("Test$", "8Test");
-+
+            if (name.equals(name8)) throw new AssertionError(name);
-+
+            try {
-+
+                return (Test)
-+
+                    Class.forName(name8)
-+
+                    .getMethod("testSuite", dataClass)
-+
+                    .invoke(null, data);
-+
+            } catch (ReflectiveOperationException e) {
-+
+                throw new AssertionError(e);
-+
+            }
-+
+        } else {
-+
+            return new TestSuite();
-+
+        }
-+
+    }
-+
-+
+    // Delays for timing-dependent tests, in milliseconds.
+    public static long SHORT_DELAY_MS;
+    public static long SMALL_DELAY_MS;
+    public static long MEDIUM_DELAY_MS;
+    public static long LONG_DELAY_MS;
-+
+    private static final long RANDOM_TIMEOUT;
-+
+    private static final long RANDOM_EXPIRED_TIMEOUT;
-+
+    private static final TimeUnit RANDOM_TIMEUNIT;
-+
+    static {
-+
+        ThreadLocalRandom rnd = ThreadLocalRandom.current();
-+
+        long[] timeouts = { Long.MIN_VALUE, -1, 0, 1, Long.MAX_VALUE };
-+
+        RANDOM_TIMEOUT = timeouts[rnd.nextInt(timeouts.length)];
-+
+        RANDOM_EXPIRED_TIMEOUT = timeouts[rnd.nextInt(3)];
-+
+        TimeUnit[] timeUnits = TimeUnit.values();
-+
+        RANDOM_TIMEUNIT = timeUnits[rnd.nextInt(timeUnits.length)];
-+
+    }
-+
-+
+    /**
-+
+     * Returns a timeout for use when any value at all will do.
-+
+     */
-+
+    static long randomTimeout() { return RANDOM_TIMEOUT; }
-+
-+
+    /**
-+
+     * Returns a timeout that means "no waiting", i.e. not positive.
-+
+     */
-+
+    static long randomExpiredTimeout() { return RANDOM_EXPIRED_TIMEOUT; }
-+
-+
+    /**
-+
+     * Returns a random non-null TimeUnit.
-+
+     */
-+
+    static TimeUnit randomTimeUnit() { return RANDOM_TIMEUNIT; }
+    /**
-<
+     * Returns the shortest timed delay. This could
-<
+     * be reimplemented to use for example a Property.
->
+     * Returns the shortest timed delay. This can be scaled up for
->
+     * slow machines using the jsr166.delay.factor system property,
->
+     * or via jtreg's -timeoutFactor: flag.
->
+     * http://openjdk.java.net/jtreg/command-help.html
+     */
+    protected long getShortDelay() {
-<
+        return 50;
->
+        return (long) (50 * delayFactor);
-–
+    /**
+     * Sets delays as multiples of SHORT_DELAY.
+     */
+        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;
->
+        LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
->
+    }
->
->
+    private static final long TIMEOUT_DELAY_MS
->
+        = (long) (12.0 * Math.cbrt(delayFactor));
->
->
+    /**
->
+     * Returns a timeout in milliseconds to be used in tests that verify
->
+     * that operations block or time out.  We want this to be longer
->
+     * than the OS scheduling quantum, but not too long, so don't scale
->
+     * linearly with delayFactor; we use "crazy" cube root instead.
->
+     */
->
+    static long timeoutMillis() {
->
+        return TIMEOUT_DELAY_MS;
->
+    }
->
->
+    /**
->
+     * Returns a new Date instance representing a time at least
->
+     * delayMillis milliseconds in the future.
->
+     */
->
+    Date delayedDate(long delayMillis) {
->
+        // Add 1 because currentTimeMillis is known to round into the past.
->
+        return new Date(System.currentTimeMillis() + delayMillis + 1);
+    /**
+     * The first exception encountered if any threadAssertXXX method fails.
+     */
+    private final AtomicReference<Throwable> threadFailure
-<
+        = new AtomicReference<Throwable>(null);
->
+        = new AtomicReference<>(null);
+    /**
+     * Records an exception so that it can be rethrown later in the test
+     * the same test have no effect.
+     */
+    public void threadRecordFailure(Throwable t) {
-+
+        System.err.println(t);
-+
+        dumpTestThreads();
+        threadFailure.compareAndSet(null, t);
+        setDelays();
-+
+    void tearDownFail(String format, Object... args) {
-+
+        String msg = toString() + ": " + String.format(format, args);
-+
+        System.err.println(msg);
-+
+        dumpTestThreads();
-+
+        throw new AssertionError(msg);
-+
+    }
-+
+    /**
-+
+     * Extra checks that get done for all test cases.
-+
+     *
+     * Triggers test case failure if any thread assertions have failed,
+     * by rethrowing, in the test harness thread, any exception recorded
+     * earlier by threadRecordFailure.
-+
+     *
-+
+     * Triggers test case failure if interrupt status is set in the main thread.
+     */
+    public void tearDown() throws Exception {
-<
+        Throwable t = threadFailure.get();
->
+        Throwable t = threadFailure.getAndSet(null);
+        if (t != null) {
+            if (t instanceof Error)
+                throw (Error) t;
+            else if (t instanceof Exception)
+                throw (Exception) t;
+            else
-<
+                throw new AssertionError(t);
->
+                throw new AssertionError(t.toString(), t);
-+
-+
+        if (Thread.interrupted())
-+
+            tearDownFail("interrupt status set in main thread");
-+
-+
+        checkForkJoinPoolThreadLeaks();
-+
+    }
-+
-+
+    /**
-+
+     * Finds missing PoolCleaners
-+
+     */
-+
+    void checkForkJoinPoolThreadLeaks() throws InterruptedException {
-+
+        Thread[] survivors = new Thread[7];
-+
+        int count = Thread.enumerate(survivors);
-+
+        for (int i = 0; i < count; i++) {
-+
+            Thread thread = survivors[i];
-+
+            String name = thread.getName();
-+
+            if (name.startsWith("ForkJoinPool-")) {
-+
+                // give thread some time to terminate
-+
+                thread.join(LONG_DELAY_MS);
-+
+                if (thread.isAlive())
-+
+                    tearDownFail("Found leaked ForkJoinPool thread thread=%s",
-+
+                                 thread);
-+
+            }
-+
+        }
-+
-+
+        if (!ForkJoinPool.commonPool()
-+
+            .awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
-+
+            tearDownFail("ForkJoin common pool thread stuck");
+    /**
+     * Just like fail(reason), but additionally recording (using
-<
+     * threadRecordFailure) any AssertionError thrown, so that the current
-<
+     * testcase will fail.
->
+     * threadRecordFailure) any AssertionError thrown, so that the
->
+     * current testcase will fail.
+     */
+    public void threadFail(String reason) {
+        try {
+            fail(reason);
-<
+        } catch (Throwable t) {
-<
+            threadRecordFailure(t);
-<
+            fail(reason);
->
+        } catch (AssertionError fail) {
->
+            threadRecordFailure(fail);
->
+            throw fail;
+    /**
+     * Just like assertTrue(b), but additionally recording (using
-<
+     * threadRecordFailure) any AssertionError thrown, so that the current
-<
+     * testcase will fail.
->
+     * threadRecordFailure) any AssertionError thrown, so that the
->
+     * current testcase will fail.
+     */
+    public void threadAssertTrue(boolean b) {
+        try {
+            assertTrue(b);
-<
+        } catch (AssertionError t) {
-<
+            threadRecordFailure(t);
-<
+            throw t;
->
+        } catch (AssertionError fail) {
->
+            threadRecordFailure(fail);
->
+            throw fail;
+    public void threadAssertFalse(boolean b) {
+        try {
+            assertFalse(b);
-<
+        } catch (AssertionError t) {
-<
+            threadRecordFailure(t);
-<
+            throw t;
->
+        } catch (AssertionError fail) {
->
+            threadRecordFailure(fail);
->
+            throw fail;
+    public void threadAssertNull(Object x) {
+        try {
+            assertNull(x);
-<
+        } catch (AssertionError t) {
-<
+            threadRecordFailure(t);
-<
+            throw t;
->
+        } catch (AssertionError fail) {
->
+            threadRecordFailure(fail);
->
+            throw fail;
+    public void threadAssertEquals(long x, long y) {
+        try {
+            assertEquals(x, y);
-<
+        } catch (AssertionError t) {
-<
+            threadRecordFailure(t);
-<
+            throw t;
->
+        } catch (AssertionError fail) {
->
+            threadRecordFailure(fail);
->
+            throw fail;
+    public void threadAssertEquals(Object x, Object y) {
+        try {
+            assertEquals(x, y);
-<
+        } catch (AssertionError t) {
-<
+            threadRecordFailure(t);
-<
+            throw t;
->
+        } catch (AssertionError fail) {
->
+            threadRecordFailure(fail);
->
+            throw fail;
->
+        } catch (Throwable fail) {
->
+            threadUnexpectedException(fail);
+    public void threadAssertSame(Object x, Object y) {
+        try {
+            assertSame(x, y);
-<
+        } catch (AssertionError t) {
-<
+            threadRecordFailure(t);
-<
+            throw t;
->
+        } catch (AssertionError fail) {
->
+            threadRecordFailure(fail);
->
+            throw fail;
+    /**
-<
+     * Calls threadFail with message "Unexpected exception" + ex.
->
+     * Records the given exception using {@link #threadRecordFailure},
->
+     * then rethrows the exception, wrapping it in an AssertionError
->
+     * if necessary.
+     */
+    public void threadUnexpectedException(Throwable t) {
+        threadRecordFailure(t);
+        t.printStackTrace();
-–
+        // Rethrow, wrapping in an AssertionError if necessary
+        if (t instanceof RuntimeException)
+            throw (RuntimeException) t;
+        else if (t instanceof Error)
+            throw (Error) t;
-<
+        else {
-<
+            AssertionError ae = new AssertionError("unexpected exception: " + t);
-<
+            t.initCause(t);
-<
+            throw ae;
-<
+        }
->
+        else
->
+            throw new AssertionError("unexpected exception: " + t, t);
->
+    }
->
->
+    /**
->
+     * Delays, via Thread.sleep, for the given millisecond delay, but
->
+     * if the sleep is shorter than specified, may re-sleep or yield
->
+     * until time elapses.  Ensures that the given time, as measured
->
+     * by System.nanoTime(), has elapsed.
->
+     */
->
+    static void delay(long millis) throws InterruptedException {
->
+        long nanos = millis * (1000 * 1000);
->
+        final long wakeupTime = System.nanoTime() + nanos;
->
+        do {
->
+            if (millis > 0L)
->
+                Thread.sleep(millis);
->
+            else // too short to sleep
->
+                Thread.yield();
->
+            nanos = wakeupTime - System.nanoTime();
->
+            millis = nanos / (1000 * 1000);
->
+        } while (nanos >= 0L);
->
+    }
->
->
+    /**
->
+     * Allows use of try-with-resources with per-test thread pools.
->
+     */
->
+    class PoolCleaner implements AutoCloseable {
->
+        private final ExecutorService pool;
->
+        public PoolCleaner(ExecutorService pool) { this.pool = pool; }
->
+        public void close() { joinPool(pool); }
->
+    }
->
->
+    /**
->
+     * An extension of PoolCleaner that has an action to release the pool.
->
+     */
->
+    class PoolCleanerWithReleaser extends PoolCleaner {
->
+        private final Runnable releaser;
->
+        public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
->
+            super(pool);
->
+            this.releaser = releaser;
->
+        }
->
+        public void close() {
->
+            try {
->
+                releaser.run();
->
+            } finally {
->
+                super.close();
->
+            }
->
+        }
->
+    }
->
->
+    PoolCleaner cleaner(ExecutorService pool) {
->
+        return new PoolCleaner(pool);
->
+    }
->
->
+    PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
->
+        return new PoolCleanerWithReleaser(pool, releaser);
->
+    }
->
->
+    PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
->
+        return new PoolCleanerWithReleaser(pool, releaser(latch));
->
+    }
->
->
+    Runnable releaser(final CountDownLatch latch) {
->
+        return new Runnable() { public void run() {
->
+            do { latch.countDown(); }
->
+            while (latch.getCount() > 0);
->
+        }};
->
+    }
->
->
+    PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
->
+        return new PoolCleanerWithReleaser(pool, releaser(flag));
->
+    }
->
->
+    Runnable releaser(final AtomicBoolean flag) {
->
+        return new Runnable() { public void run() { flag.set(true); }};
+    /**
+     * Waits out termination of a thread pool or fails doing so.
+     */
-<
+    public void joinPool(ExecutorService exec) {
->
+    void joinPool(ExecutorService pool) {
+        try {
-<
+            exec.shutdown();
-<
+            assertTrue(exec.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
->
+            pool.shutdown();
->
+            if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
->
+                try {
->
+                    threadFail("ExecutorService " + pool +
->
+                               " did not terminate in a timely manner");
->
+                } finally {
->
+                    // last resort, for the benefit of subsequent tests
->
+                    pool.shutdownNow();
->
+                    pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
->
+                }
->
+            }
+        } catch (SecurityException ok) {
+            // Allowed in case test doesn't have privs
-<
+        } catch (InterruptedException ie) {
-<
+            fail("Unexpected InterruptedException");
->
+        } catch (InterruptedException fail) {
->
+            threadFail("Unexpected InterruptedException");
-+
+    /**
-+
+     * Like Runnable, but with the freedom to throw anything.
-+
+     * junit folks had the same idea:
-+
+     * http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
-+
+     */
-+
+    interface Action { public void run() throws Throwable; }
-+
-+
+    /**
-+
+     * Runs all the given actions in parallel, failing if any fail.
-+
+     * Useful for running multiple variants of tests that are
-+
+     * necessarily individually slow because they must block.
-+
+     */
-+
+    void testInParallel(Action ... actions) {
-+
+        ExecutorService pool = Executors.newCachedThreadPool();
-+
+        try (PoolCleaner cleaner = cleaner(pool)) {
-+
+            ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
-+
+            for (final Action action : actions)
-+
+                futures.add(pool.submit(new CheckedRunnable() {
-+
+                    public void realRun() throws Throwable { action.run();}}));
-+
+            for (Future<?> future : futures)
-+
+                try {
-+
+                    assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
-+
+                } catch (ExecutionException ex) {
-+
+                    threadUnexpectedException(ex.getCause());
-+
+                } catch (Exception ex) {
-+
+                    threadUnexpectedException(ex);
-+
+                }
-+
+        }
-+
+    }
-+
-+
+    /**
-+
+     * A debugging tool to print stack traces of most threads, as jstack does.
-+
+     * Uninteresting threads are filtered out.
-+
+     */
-+
+    static void dumpTestThreads() {
-+
+        SecurityManager sm = System.getSecurityManager();
-+
+        if (sm != null) {
-+
+            try {
-+
+                System.setSecurityManager(null);
-+
+            } catch (SecurityException giveUp) {
-+
+                return;
-+
+            }
-+
+        }
-+
-+
+        ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
-+
+        System.err.println("------ stacktrace dump start ------");
-+
+        for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
-+
+            final String name = info.getThreadName();
-+
+            String lockName;
-+
+            if ("Signal Dispatcher".equals(name))
-+
+                continue;
-+
+            if ("Reference Handler".equals(name)
-+
+                && (lockName = info.getLockName()) != null
-+
+                && lockName.startsWith("java.lang.ref.Reference$Lock"))
-+
+                continue;
-+
+            if ("Finalizer".equals(name)
-+
+                && (lockName = info.getLockName()) != null
-+
+                && lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
-+
+                continue;
-+
+            if ("checkForWedgedTest".equals(name))
-+
+                continue;
-+
+            System.err.print(info);
-+
+        }
-+
+        System.err.println("------ stacktrace dump end ------");
-+
-+
+        if (sm != null) System.setSecurityManager(sm);
-+
+    }
-+
-+
+    /**
-+
+     * Checks that thread eventually enters the expected blocked thread state.
-+
+     */
-+
+    void assertThreadBlocks(Thread thread, Thread.State expected) {
-+
+        // always sleep at least 1 ms, with high probability avoiding
-+
+        // transitory states
-+
+        for (long retries = LONG_DELAY_MS * 3 / 4; retries-->0; ) {
-+
+            try { delay(1); }
-+
+            catch (InterruptedException fail) {
-+
+                throw new AssertionError("Unexpected InterruptedException", fail);
-+
+            }
-+
+            Thread.State s = thread.getState();
-+
+            if (s == expected)
-+
+                return;
-+
+            else if (s == Thread.State.TERMINATED)
-+
+                fail("Unexpected thread termination");
-+
+        }
-+
+        fail("timed out waiting for thread to enter thread state " + expected);
-+
+    }
-+
-+
+    /**
-+
+     * Checks that future.get times out, with the default timeout of
-+
+     * {@code timeoutMillis()}.
-+
+     */
-+
+    void assertFutureTimesOut(Future future) {
-+
+        assertFutureTimesOut(future, timeoutMillis());
-+
+    }
-+
-+
+    /**
-+
+     * Checks that future.get times out, with the given millisecond timeout.
-+
+     */
-+
+    void assertFutureTimesOut(Future future, long timeoutMillis) {
-+
+        long startTime = System.nanoTime();
-+
+        try {
-+
+            future.get(timeoutMillis, MILLISECONDS);
-+
+            shouldThrow();
-+
+        } catch (TimeoutException success) {
-+
+        } catch (Exception fail) {
-+
+            threadUnexpectedException(fail);
-+
+        } finally { future.cancel(true); }
-+
+        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
-+
+    }
+    /**
+     * Fails with message "should throw exception".
+    /**
-<
+     * Fails with message "Unexpected exception: " + ex.
->
+     * The maximum number of consecutive spurious wakeups we should
->
+     * tolerate (from APIs like LockSupport.park) before failing a test.
+     */
-<
+    public void unexpectedException(Throwable ex) {
-<
+        ex.printStackTrace();
-<
+        fail("Unexpected exception: " + ex);
-<
+    }
-<
->
+    static final int MAX_SPURIOUS_WAKEUPS = 10;
+    /**
+     * The number of elements to place in collections, arrays, etc.
+    public static final Integer m6  = new Integer(-6);
+    public static final Integer m10 = new Integer(-10);
-–
+    /**
+     * Runs Runnable r with a security policy that permits precisely
+     * the specified permissions.  If there is no current security
+        SecurityManager sm = System.getSecurityManager();
+        if (sm == null) {
+            r.run();
-+
+        }
-+
+        runWithSecurityManagerWithPermissions(r, permissions);
-+
+    }
-+
-+
+    /**
-+
+     * Runs Runnable r with a security policy that permits precisely
-+
+     * the specified permissions.  If there is no current security
-+
+     * manager, a temporary one is set for the duration of the
-+
+     * Runnable.  We require that any security manager permit
-+
+     * getPolicy/setPolicy.
-+
+     */
-+
+    public void runWithSecurityManagerWithPermissions(Runnable r,
-+
+                                                      Permission... permissions) {
-+
+        SecurityManager sm = System.getSecurityManager();
-+
+        if (sm == null) {
+            Policy savedPolicy = Policy.getPolicy();
+            try {
+                Policy.setPolicy(permissivePolicy());
+                System.setSecurityManager(new SecurityManager());
-<
+                runWithPermissions(r, permissions);
->
+                runWithSecurityManagerWithPermissions(r, permissions);
+            } finally {
+                System.setSecurityManager(null);
+                Policy.setPolicy(savedPolicy);
+            return perms.implies(p);
+        public void refresh() {}
-+
+        public String toString() {
-+
+            List<Permission> ps = new ArrayList<>();
-+
+            for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
-+
+                ps.add(e.nextElement());
-+
+            return "AdjustablePolicy with permissions " + ps;
-+
+        }
+    /**
+    /**
-<
+     * Sleep until the timeout has elapsed, or interrupted.
-<
+     * Does <em>NOT</em> throw InterruptedException.
->
+     * Sleeps until the given time has elapsed.
->
+     * Throws AssertionError if interrupted.
+     */
-<
+    void sleepTillInterrupted(long timeoutMillis) {
->
+    static void sleep(long millis) {
+        try {
-<
+            Thread.sleep(timeoutMillis);
-<
+        } catch (InterruptedException wakeup) {}
->
+            delay(millis);
->
+        } catch (InterruptedException fail) {
->
+            throw new AssertionError("Unexpected InterruptedException", fail);
->
+        }
+    /**
-<
+     * Returns a new started Thread running the given runnable.
->
+     * Spin-waits up to the specified number of milliseconds for the given
->
+     * thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
->
+     */
->
+    void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
->
+        long startTime = 0L;
->
+        for (;;) {
->
+            Thread.State s = thread.getState();
->
+            if (s == Thread.State.BLOCKED ||
->
+                s == Thread.State.WAITING ||
->
+                s == Thread.State.TIMED_WAITING)
->
+                return;
->
+            else if (s == Thread.State.TERMINATED)
->
+                fail("Unexpected thread termination");
->
+            else if (startTime == 0L)
->
+                startTime = System.nanoTime();
->
+            else if (millisElapsedSince(startTime) > timeoutMillis) {
->
+                threadAssertTrue(thread.isAlive());
->
+                fail("timed out waiting for thread to enter wait state");
->
+            }
->
+            Thread.yield();
->
+        }
->
+    }
->
->
+    /**
->
+     * Spin-waits up to the specified number of milliseconds for the given
->
+     * thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
->
+     * and additionally satisfy the given condition.
->
+     */
->
+    void waitForThreadToEnterWaitState(
->
+        Thread thread, long timeoutMillis, Callable<Boolean> waitingForGodot) {
->
+        long startTime = 0L;
->
+        for (;;) {
->
+            Thread.State s = thread.getState();
->
+            if (s == Thread.State.BLOCKED ||
->
+                s == Thread.State.WAITING ||
->
+                s == Thread.State.TIMED_WAITING) {
->
+                try {
->
+                    if (waitingForGodot.call())
->
+                        return;
->
+                } catch (Throwable fail) { threadUnexpectedException(fail); }
->
+            }
->
+            else if (s == Thread.State.TERMINATED)
->
+                fail("Unexpected thread termination");
->
+            else if (startTime == 0L)
->
+                startTime = System.nanoTime();
->
+            else if (millisElapsedSince(startTime) > timeoutMillis) {
->
+                threadAssertTrue(thread.isAlive());
->
+                fail("timed out waiting for thread to enter wait state");
->
+            }
->
+            Thread.yield();
->
+        }
->
+    }
->
->
+    /**
->
+     * Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
->
+     * enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
->
+     */
->
+    void waitForThreadToEnterWaitState(Thread thread) {
->
+        waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
->
+    }
->
->
+    /**
->
+     * Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
->
+     * enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
->
+     * and additionally satisfy the given condition.
->
+     */
->
+    void waitForThreadToEnterWaitState(
->
+        Thread thread, Callable<Boolean> waitingForGodot) {
->
+        waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
->
+    }
->
->
+    /**
->
+     * Returns the number of milliseconds since time given by
->
+     * startNanoTime, which must have been previously returned from a
->
+     * call to {@link System#nanoTime()}.
->
+     */
->
+    static long millisElapsedSince(long startNanoTime) {
->
+        return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
->
+    }
->
->
+//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
->
+//         long startTime = System.nanoTime();
->
+//         try {
->
+//             r.run();
->
+//         } catch (Throwable fail) { threadUnexpectedException(fail); }
->
+//         if (millisElapsedSince(startTime) > timeoutMillis/2)
->
+//             throw new AssertionError("did not return promptly");
->
+//     }
->
->
+//     void assertTerminatesPromptly(Runnable r) {
->
+//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
->
+//     }
->
->
+    /**
->
+     * Checks that timed f.get() returns the expected value, and does not
->
+     * wait for the timeout to elapse before returning.
->
+     */
->
+    <T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
->
+        long startTime = System.nanoTime();
->
+        try {
->
+            assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
->
+        } catch (Throwable fail) { threadUnexpectedException(fail); }
->
+        if (millisElapsedSince(startTime) > timeoutMillis/2)
->
+            throw new AssertionError("timed get did not return promptly");
->
+    }
->
->
+    <T> void checkTimedGet(Future<T> f, T expectedValue) {
->
+        checkTimedGet(f, expectedValue, LONG_DELAY_MS);
->
+    }
->
->
+    /**
->
+     * Returns a new started daemon Thread running the given runnable.
+     */
+    Thread newStartedThread(Runnable runnable) {
+        Thread t = new Thread(runnable);
-+
+        t.setDaemon(true);
+        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);
->
+    /**
->
+     * Waits for the specified time (in milliseconds) for the thread
->
+     * to terminate (using {@link Thread#join(long)}), else interrupts
->
+     * the thread (in the hope that it may terminate later) and fails.
->
+     */
->
+    void awaitTermination(Thread t, long timeoutMillis) {
->
+        try {
->
+            t.join(timeoutMillis);
->
+        } catch (InterruptedException fail) {
->
+            threadUnexpectedException(fail);
->
+        } finally {
->
+            if (t.getState() != Thread.State.TERMINATED) {
->
+                t.interrupt();
->
+                threadFail("timed out waiting for thread to terminate");
-<
+    public abstract class RunnableShouldThrow implements Runnable {
-<
+        protected abstract void realRun() throws Throwable;
->
+    /**
->
+     * Waits for LONG_DELAY_MS milliseconds for the thread to
->
+     * terminate (using {@link Thread#join(long)}), else interrupts
->
+     * the thread (in the hope that it may terminate later) and fails.
->
+     */
->
+    void awaitTermination(Thread t) {
->
+        awaitTermination(t, LONG_DELAY_MS);
->
+    }
-<
+        final Class<?> exceptionClass;
->
+    // Some convenient Runnable classes
-<
+        <T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
-<
+            this.exceptionClass = exceptionClass;
-<
+        }
->
+    public abstract class CheckedRunnable implements Runnable {
->
+        protected abstract void realRun() throws Throwable;
+        public final void run() {
+            try {
+                realRun();
-<
+                threadShouldThrow(exceptionClass.getSimpleName());
-<
+            } catch (Throwable t) {
-<
+                if (! exceptionClass.isInstance(t))
-<
+                    threadUnexpectedException(t);
->
+            } catch (Throwable fail) {
->
+                threadUnexpectedException(fail);
+                realRun();
+                threadShouldThrow("InterruptedException");
+            } catch (InterruptedException success) {
-<
+            } catch (Throwable t) {
-<
+                threadUnexpectedException(t);
->
+                threadAssertFalse(Thread.interrupted());
->
+            } catch (Throwable fail) {
->
+                threadUnexpectedException(fail);
+        public final T call() {
+            try {
+                return realCall();
-<
+            } catch (Throwable t) {
-<
+                threadUnexpectedException(t);
->
+            } catch (Throwable fail) {
->
+                threadUnexpectedException(fail);
+                return null;
+                threadShouldThrow("InterruptedException");
+                return result;
+            } catch (InterruptedException success) {
-<
+            } catch (Throwable t) {
-<
+                threadUnexpectedException(t);
->
+                threadAssertFalse(Thread.interrupted());
->
+            } catch (Throwable fail) {
->
+                threadUnexpectedException(fail);
+            return null;
+    public static final String TEST_STRING = "a test string";
+    public static class StringTask implements Callable<String> {
-<
+        public String call() { return TEST_STRING; }
->
+        final String value;
->
+        public StringTask() { this(TEST_STRING); }
->
+        public StringTask(String value) { this.value = value; }
->
+        public String call() { return value; }
+    public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
+        return new CheckedCallable<String>() {
-<
+            public String realCall() {
->
+            protected String realCall() {
+                try {
+                    latch.await();
+                } catch (InterruptedException quittingTime) {}
+            }};
-<
+    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 Runnable countDowner(final CountDownLatch latch) {
->
+        return new CheckedRunnable() {
->
+            public void realRun() throws InterruptedException {
->
+                latch.countDown();
->
+            }};
-<
+    public class ShortRunnable extends CheckedRunnable {
-<
+        protected void realRun() throws Throwable {
-<
+            Thread.sleep(SHORT_DELAY_MS);
->
+    class LatchAwaiter extends CheckedRunnable {
->
+        static final int NEW = 0;
->
+        static final int RUNNING = 1;
->
+        static final int DONE = 2;
->
+        final CountDownLatch latch;
->
+        int state = NEW;
->
+        LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
->
+        public void realRun() throws InterruptedException {
->
+            state = 1;
->
+            await(latch);
->
+            state = 2;
-<
+    public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
-<
+        protected void realRun() throws InterruptedException {
-<
+            Thread.sleep(SHORT_DELAY_MS);
-<
+        }
->
+    public LatchAwaiter awaiter(CountDownLatch latch) {
->
+        return new LatchAwaiter(latch);
-<
+    public class SmallRunnable extends CheckedRunnable {
-<
+        protected void realRun() throws Throwable {
-<
+            Thread.sleep(SMALL_DELAY_MS);
->
+    public void await(CountDownLatch latch, long timeoutMillis) {
->
+        try {
->
+            if (!latch.await(timeoutMillis, MILLISECONDS))
->
+                fail("timed out waiting for CountDownLatch for "
->
+                     + (timeoutMillis/1000) + " sec");
->
+        } catch (Throwable fail) {
->
+            threadUnexpectedException(fail);
-<
+    public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
-<
+        protected void realRun() {
-<
+            try {
-<
+                Thread.sleep(SMALL_DELAY_MS);
-<
+            } catch (InterruptedException ok) {}
-<
+        }
->
+    public void await(CountDownLatch latch) {
->
+        await(latch, LONG_DELAY_MS);
-<
+    public class SmallCallable extends CheckedCallable {
-<
+        protected Object realCall() throws InterruptedException {
-<
+            Thread.sleep(SMALL_DELAY_MS);
-<
+            return Boolean.TRUE;
->
+    public void await(Semaphore semaphore) {
->
+        try {
->
+            if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
->
+                fail("timed out waiting for Semaphore for "
->
+                     + (LONG_DELAY_MS/1000) + " sec");
->
+        } catch (Throwable fail) {
->
+            threadUnexpectedException(fail);
-<
+    public class SmallInterruptedRunnable extends CheckedInterruptedRunnable {
-<
+        protected void realRun() throws InterruptedException {
-<
+            Thread.sleep(SMALL_DELAY_MS);
->
+    public void await(CyclicBarrier barrier) {
->
+        try {
->
+            barrier.await(LONG_DELAY_MS, MILLISECONDS);
->
+        } catch (Throwable fail) {
->
+            threadUnexpectedException(fail);
-<
+    public class MediumRunnable extends CheckedRunnable {
-<
+        protected void realRun() throws Throwable {
-<
+            Thread.sleep(MEDIUM_DELAY_MS);
-<
+        }
-<
+    }
->
+//     /**
->
+//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
->
+//      */
->
+//     public void await(AtomicBoolean flag) {
->
+//         await(flag, LONG_DELAY_MS);
->
+//     }
->
->
+//     /**
->
+//      * Spin-waits up to the specified timeout until flag becomes true.
->
+//      */
->
+//     public void await(AtomicBoolean flag, long timeoutMillis) {
->
+//         long startTime = System.nanoTime();
->
+//         while (!flag.get()) {
->
+//             if (millisElapsedSince(startTime) > timeoutMillis)
->
+//                 throw new AssertionError("timed out");
->
+//             Thread.yield();
->
+//         }
->
+//     }
-<
+    public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
-<
+        protected void realRun() throws InterruptedException {
-<
+            Thread.sleep(MEDIUM_DELAY_MS);
-<
+        }
->
+    public static class NPETask implements Callable<String> {
->
+        public String call() { throw new NullPointerException(); }
-<
+    public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
->
+    public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
+        protected void realRun() {
+            try {
-<
+                Thread.sleep(MEDIUM_DELAY_MS);
->
+                delay(SMALL_DELAY_MS);
+            } catch (InterruptedException ok) {}
-<
+    public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
-<
+        protected void realRun() {
-<
+            try {
-<
+                Thread.sleep(LONG_DELAY_MS);
-<
+            } catch (InterruptedException ok) {}
-<
+        }
->
+    public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
->
+        return new CheckedRunnable() {
->
+            protected void realRun() {
->
+                try {
->
+                    delay(timeoutMillis);
->
+                } catch (InterruptedException ok) {}
->
+            }};
+    /**
-<
+    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 interface TrackedRunnable extends Runnable {
->
+        boolean isDone();
+    public static class TrackedNoOpRunnable implements Runnable {
-–
+    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;
-–
+        }
-–
+    }
-–
+    /**
+     * Analog of CheckedRunnable for RecursiveAction
+     */
+    public abstract class CheckedRecursiveAction extends RecursiveAction {
+        protected abstract void realCompute() throws Throwable;
-<
+        public final void compute() {
->
+        @Override protected final void compute() {
+            try {
+                realCompute();
-<
+            } catch (Throwable t) {
-<
+                threadUnexpectedException(t);
->
+            } catch (Throwable fail) {
->
+                threadUnexpectedException(fail);
+    public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
+        protected abstract T realCompute() throws Throwable;
-<
+        public final T compute() {
->
+        @Override protected final T compute() {
+            try {
+                return realCompute();
-<
+            } catch (Throwable t) {
-<
+                threadUnexpectedException(t);
->
+            } catch (Throwable fail) {
->
+                threadUnexpectedException(fail);
+                return null;
+                                      ThreadPoolExecutor executor) {}
-+
+    /**
-+
+     * A CyclicBarrier that uses timed await and fails with
-+
+     * AssertionErrors instead of throwing checked exceptions.
-+
+     */
-+
+    public static class CheckedBarrier extends CyclicBarrier {
-+
+        public CheckedBarrier(int parties) { super(parties); }
-+
-+
+        public int await() {
-+
+            try {
-+
+                return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
-+
+            } catch (TimeoutException timedOut) {
-+
+                throw new AssertionError("timed out");
-+
+            } catch (Exception fail) {
-+
+                throw new AssertionError("Unexpected exception: " + fail, fail);
-+
+            }
-+
+        }
-+
+    }
-+
-+
+    void checkEmpty(BlockingQueue q) {
-+
+        try {
-+
+            assertTrue(q.isEmpty());
-+
+            assertEquals(0, q.size());
-+
+            assertNull(q.peek());
-+
+            assertNull(q.poll());
-+
+            assertNull(q.poll(randomExpiredTimeout(), randomTimeUnit()));
-+
+            assertEquals(q.toString(), "[]");
-+
+            assertTrue(Arrays.equals(q.toArray(), new Object[0]));
-+
+            assertFalse(q.iterator().hasNext());
-+
+            try {
-+
+                q.element();
-+
+                shouldThrow();
-+
+            } catch (NoSuchElementException success) {}
-+
+            try {
-+
+                q.iterator().next();
-+
+                shouldThrow();
-+
+            } catch (NoSuchElementException success) {}
-+
+            try {
-+
+                q.remove();
-+
+                shouldThrow();
-+
+            } catch (NoSuchElementException success) {}
-+
+        } catch (InterruptedException fail) { threadUnexpectedException(fail); }
-+
+    }
-+
-+
+    void assertSerialEquals(Object x, Object y) {
-+
+        assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
-+
+    }
-+
-+
+    void assertNotSerialEquals(Object x, Object y) {
-+
+        assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
-+
+    }
-+
-+
+    byte[] serialBytes(Object o) {
-+
+        try {
-+
+            ByteArrayOutputStream bos = new ByteArrayOutputStream();
-+
+            ObjectOutputStream oos = new ObjectOutputStream(bos);
-+
+            oos.writeObject(o);
-+
+            oos.flush();
-+
+            oos.close();
-+
+            return bos.toByteArray();
-+
+        } catch (Throwable fail) {
-+
+            threadUnexpectedException(fail);
-+
+            return new byte[0];
-+
+        }
-+
+    }
-+
-+
+    void assertImmutable(final Object o) {
-+
+        if (o instanceof Collection) {
-+
+            assertThrows(
-+
+                UnsupportedOperationException.class,
-+
+                new Runnable() { public void run() {
-+
+                        ((Collection) o).add(null);}});
-+
+        }
-+
+    }
-+
-+
+    @SuppressWarnings("unchecked")
-+
+    <T> T serialClone(T o) {
-+
+        try {
-+
+            ObjectInputStream ois = new ObjectInputStream
-+
+                (new ByteArrayInputStream(serialBytes(o)));
-+
+            T clone = (T) ois.readObject();
-+
+            if (o == clone) assertImmutable(o);
-+
+            assertSame(o.getClass(), clone.getClass());
-+
+            return clone;
-+
+        } catch (Throwable fail) {
-+
+            threadUnexpectedException(fail);
-+
+            return null;
-+
+        }
-+
+    }
-+
-+
+    /**
-+
+     * A version of serialClone that leaves error handling (for
-+
+     * e.g. NotSerializableException) up to the caller.
-+
+     */
-+
+    @SuppressWarnings("unchecked")
-+
+    <T> T serialClonePossiblyFailing(T o)
-+
+        throws ReflectiveOperationException, java.io.IOException {
-+
+        ByteArrayOutputStream bos = new ByteArrayOutputStream();
-+
+        ObjectOutputStream oos = new ObjectOutputStream(bos);
-+
+        oos.writeObject(o);
-+
+        oos.flush();
-+
+        oos.close();
-+
+        ObjectInputStream ois = new ObjectInputStream
-+
+            (new ByteArrayInputStream(bos.toByteArray()));
-+
+        T clone = (T) ois.readObject();
-+
+        if (o == clone) assertImmutable(o);
-+
+        assertSame(o.getClass(), clone.getClass());
-+
+        return clone;
-+
+    }
-+
-+
+    /**
-+
+     * If o implements Cloneable and has a public clone method,
-+
+     * returns a clone of o, else null.
-+
+     */
-+
+    @SuppressWarnings("unchecked")
-+
+    <T> T cloneableClone(T o) {
-+
+        if (!(o instanceof Cloneable)) return null;
-+
+        final T clone;
-+
+        try {
-+
+            clone = (T) o.getClass().getMethod("clone").invoke(o);
-+
+        } catch (NoSuchMethodException ok) {
-+
+            return null;
-+
+        } catch (ReflectiveOperationException unexpected) {
-+
+            throw new Error(unexpected);
-+
+        }
-+
+        assertNotSame(o, clone); // not 100% guaranteed by spec
-+
+        assertSame(o.getClass(), clone.getClass());
-+
+        return clone;
-+
+    }
-+
-+
+    public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
-+
+                             Runnable... throwingActions) {
-+
+        for (Runnable throwingAction : throwingActions) {
-+
+            boolean threw = false;
-+
+            try { throwingAction.run(); }
-+
+            catch (Throwable t) {
-+
+                threw = true;
-+
+                if (!expectedExceptionClass.isInstance(t))
-+
+                    throw new AssertionError(
-+
+                            "Expected " + expectedExceptionClass.getName() +
-+
+                            ", got " + t.getClass().getName(),
-+
+                            t);
-+
+            }
-+
+            if (!threw)
-+
+                shouldThrow(expectedExceptionClass.getName());
-+
+        }
-+
+    }
-+
-+
+    public void assertIteratorExhausted(Iterator<?> it) {
-+
+        try {
-+
+            it.next();
-+
+            shouldThrow();
-+
+        } catch (NoSuchElementException success) {}
-+
+        assertFalse(it.hasNext());
-+
+    }
-+
-+
+    public <T> Callable<T> callableThrowing(final Exception ex) {
-+
+        return new Callable<T>() { public T call() throws Exception { throw ex; }};
-+
+    }
-+
-+
+    public Runnable runnableThrowing(final RuntimeException ex) {
-+
+        return new Runnable() { public void run() { throw ex; }};
-+
+    }
-+
-+
+    /** A reusable thread pool to be shared by tests. */
-+
+    static final ExecutorService cachedThreadPool =
-+
+        new ThreadPoolExecutor(0, Integer.MAX_VALUE,
-+
+L, MILLISECONDS,
-+
+                               new SynchronousQueue<Runnable>());
-+
-+
+    static <T> void shuffle(T[] array) {
-+
+        Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
-+
+    }
-+
-+
+    /**
-+
+     * Returns the same String as would be returned by {@link
-+
+     * Object#toString}, whether or not the given object's class
-+
+     * overrides toString().
-+
+     *
-+
+     * @see System#identityHashCode
-+
+     */
-+
+    static String identityString(Object x) {
-+
+        return x.getClass().getName()
-+
+            + "@" + Integer.toHexString(System.identityHashCode(x));
-+
+    }
-+
-+
+    // --- Shared assertions for Executor tests ---
-+
-+
+    /**
-+
+     * Returns maximum number of tasks that can be submitted to given
-+
+     * pool (with bounded queue) before saturation (when submission
-+
+     * throws RejectedExecutionException).
-+
+     */
-+
+    static final int saturatedSize(ThreadPoolExecutor pool) {
-+
+        BlockingQueue<Runnable> q = pool.getQueue();
-+
+        return pool.getMaximumPoolSize() + q.size() + q.remainingCapacity();
-+
+    }
-+
-+
+    @SuppressWarnings("FutureReturnValueIgnored")
-+
+    void assertNullTaskSubmissionThrowsNullPointerException(Executor e) {
-+
+        try {
-+
+            e.execute((Runnable) null);
-+
+            shouldThrow();
-+
+        } catch (NullPointerException success) {}
-+
-+
+        if (! (e instanceof ExecutorService)) return;
-+
+        ExecutorService es = (ExecutorService) e;
-+
+        try {
-+
+            es.submit((Runnable) null);
-+
+            shouldThrow();
-+
+        } catch (NullPointerException success) {}
-+
+        try {
-+
+            es.submit((Runnable) null, Boolean.TRUE);
-+
+            shouldThrow();
-+
+        } catch (NullPointerException success) {}
-+
+        try {
-+
+            es.submit((Callable) null);
-+
+            shouldThrow();
-+
+        } catch (NullPointerException success) {}
-+
-+
+        if (! (e instanceof ScheduledExecutorService)) return;
-+
+        ScheduledExecutorService ses = (ScheduledExecutorService) e;
-+
+        try {
-+
+            ses.schedule((Runnable) null,
-+
+                         randomTimeout(), randomTimeUnit());
-+
+            shouldThrow();
-+
+        } catch (NullPointerException success) {}
-+
+        try {
-+
+            ses.schedule((Callable) null,
-+
+                         randomTimeout(), randomTimeUnit());
-+
+            shouldThrow();
-+
+        } catch (NullPointerException success) {}
-+
+        try {
-+
+            ses.scheduleAtFixedRate((Runnable) null,
-+
+                                    randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
-+
+            shouldThrow();
-+
+        } catch (NullPointerException success) {}
-+
+        try {
-+
+            ses.scheduleWithFixedDelay((Runnable) null,
-+
+                                       randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
-+
+            shouldThrow();
-+
+        } catch (NullPointerException success) {}
-+
+    }
-+
-+
+    void setRejectedExecutionHandler(
-+
+        ThreadPoolExecutor p, RejectedExecutionHandler handler) {
-+
+        p.setRejectedExecutionHandler(handler);
-+
+        assertSame(handler, p.getRejectedExecutionHandler());
-+
+    }
-+
-+
+    void assertTaskSubmissionsAreRejected(ThreadPoolExecutor p) {
-+
+        final RejectedExecutionHandler savedHandler = p.getRejectedExecutionHandler();
-+
+        final long savedTaskCount = p.getTaskCount();
-+
+        final long savedCompletedTaskCount = p.getCompletedTaskCount();
-+
+        final int savedQueueSize = p.getQueue().size();
-+
+        final boolean stock = (p.getClass().getClassLoader() == null);
-+
-+
+        Runnable r = () -> {};
-+
+        Callable<Boolean> c = () -> Boolean.TRUE;
-+
-+
+        class Recorder implements RejectedExecutionHandler {
-+
+            public volatile Runnable r = null;
-+
+            public volatile ThreadPoolExecutor p = null;
-+
+            public void reset() { r = null; p = null; }
-+
+            public void rejectedExecution(Runnable r, ThreadPoolExecutor p) {
-+
+                assertNull(this.r);
-+
+                assertNull(this.p);
-+
+                this.r = r;
-+
+                this.p = p;
-+
+            }
-+
+        }
-+
-+
+        // check custom handler is invoked exactly once per task
-+
+        Recorder recorder = new Recorder();
-+
+        setRejectedExecutionHandler(p, recorder);
-+
+        for (int i = 2; i--> 0; ) {
-+
+            recorder.reset();
-+
+            p.execute(r);
-+
+            if (stock && p.getClass() == ThreadPoolExecutor.class)
-+
+                assertSame(r, recorder.r);
-+
+            assertSame(p, recorder.p);
-+
-+
+            recorder.reset();
-+
+            assertFalse(p.submit(r).isDone());
-+
+            if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
-+
+            assertSame(p, recorder.p);
-+
-+
+            recorder.reset();
-+
+            assertFalse(p.submit(r, Boolean.TRUE).isDone());
-+
+            if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
-+
+            assertSame(p, recorder.p);
-+
-+
+            recorder.reset();
-+
+            assertFalse(p.submit(c).isDone());
-+
+            if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
-+
+            assertSame(p, recorder.p);
-+
-+
+            if (p instanceof ScheduledExecutorService) {
-+
+                ScheduledExecutorService s = (ScheduledExecutorService) p;
-+
+                ScheduledFuture<?> future;
-+
-+
+                recorder.reset();
-+
+                future = s.schedule(r, randomTimeout(), randomTimeUnit());
-+
+                assertFalse(future.isDone());
-+
+                if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
-+
+                assertSame(p, recorder.p);
-+
-+
+                recorder.reset();
-+
+                future = s.schedule(c, randomTimeout(), randomTimeUnit());
-+
+                assertFalse(future.isDone());
-+
+                if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
-+
+                assertSame(p, recorder.p);
-+
-+
+                recorder.reset();
-+
+                future = s.scheduleAtFixedRate(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
-+
+                assertFalse(future.isDone());
-+
+                if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
-+
+                assertSame(p, recorder.p);
-+
-+
+                recorder.reset();
-+
+                future = s.scheduleWithFixedDelay(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
-+
+                assertFalse(future.isDone());
-+
+                if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
-+
+                assertSame(p, recorder.p);
-+
+            }
-+
+        }
-+
-+
+        // Checking our custom handler above should be sufficient, but
-+
+        // we add some integration tests of standard handlers.
-+
+        final AtomicReference<Thread> thread = new AtomicReference<>();
-+
+        final Runnable setThread = () -> thread.set(Thread.currentThread());
-+
-+
+        setRejectedExecutionHandler(p, new ThreadPoolExecutor.AbortPolicy());
-+
+        try {
-+
+            p.execute(setThread);
-+
+            shouldThrow();
-+
+        } catch (RejectedExecutionException success) {}
-+
+        assertNull(thread.get());
-+
-+
+        setRejectedExecutionHandler(p, new ThreadPoolExecutor.DiscardPolicy());
-+
+        p.execute(setThread);
-+
+        assertNull(thread.get());
-+
-+
+        setRejectedExecutionHandler(p, new ThreadPoolExecutor.CallerRunsPolicy());
-+
+        p.execute(setThread);
-+
+        if (p.isShutdown())
-+
+            assertNull(thread.get());
-+
+        else
-+
+            assertSame(Thread.currentThread(), thread.get());
-+
-+
+        setRejectedExecutionHandler(p, savedHandler);
-+
-+
+        // check that pool was not perturbed by handlers
-+
+        assertEquals(savedTaskCount, p.getTaskCount());
-+
+        assertEquals(savedCompletedTaskCount, p.getCompletedTaskCount());
-+
+        assertEquals(savedQueueSize, p.getQueue().size());
-+
+    }

Diff Legend

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+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents): Revision 1.53 by jsr166, Thu Sep 16 00:52:49 2010 UTC vs. Revision 1.242 by jsr166, Mon Feb 19 16:12:11 2018 UTC

Diff Legend

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.53 by jsr166, Thu Sep 16 00:52:49 2010 UTC vs.
Revision 1.242 by jsr166, Mon Feb 19 16:12:11 2018 UTC