Java程序
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/*
* 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/publicdomain/zero/1.0/
* Other contributors include Andrew Wright, Jeffrey Hayes,
* Pat Fisher, Mike Judd.
*/
package jsr166;
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.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.Permissions;
import java.security.Policy;
import java.security.ProtectionDomain;
import java.security.SecurityPermission;
import java.util.ArrayList;
import java.util.Arrays;
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.Executors;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.ForkJoinPool;
import java.util.concurrent.Future;
import java.util.concurrent.RecursiveAction;
import java.util.concurrent.RecursiveTask;
import java.util.concurrent.RejectedExecutionHandler;
import java.util.concurrent.Semaphore;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicReference;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import junit.framework.AssertionFailedError;
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,
* 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
* {@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>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>All delays and timeouts must use one of the constants {@code
* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
* {@code LONG_DELAY_MS}. 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>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.
*
* </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>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>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>The test classes currently do not declare inclusion in
* any particular package to simplify things for people integrating
* them in TCK test suites.
*
* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
* runs all JSR166 unit tests.
*
* </ul>
*/
public class JSR166TestCase extends TestCase {
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);
private static float systemPropertyValue(String name, float defaultValue) {
String floatString = System.getProperty(name);
if (floatString == null)
return defaultValue;
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.
*/
private static final float delayFactor =
systemPropertyValue("jsr166.delay.factor", 1.0f);
/**
* The timeout factor as used in the jtreg test harness.
* See: http://openjdk.java.net/jtreg/tag-spec.html
*/
private static final float jtregTestTimeoutFactor
= systemPropertyValue("test.timeout.factor", 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 {
// Matcher matcher = Pattern.compile("model name\\s*: (.*)")
// .matcher(new String(
// Files.readAllBytes(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.
*/
// android-note: Removed because no junit.textui
// 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());
// }
// for (int i = 0; i < suiteRuns; i++) {
// TestResult result = newPithyTestRunner().doRun(suite);
// if (!result.wasSuccessful())
// System.exit(1);
// System.gc();
// System.runFinalization();
// }
// }
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",
new Class<?>[0]);
suite.addTest(newTestSuite((Test)m.invoke(null)));
} catch (Exception e) {
throw new Error("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
// As of 2015-09, java9 still uses 52.0 class file version
|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
}
public static boolean atLeastJava10() {
return JAVA_CLASS_VERSION >= 54.0
|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
}
/**
* Collects all JSR166 unit tests as one suite.
*/
// android-note: Removed because the CTS runner does a bad job of
// public static Test suite() {
// // 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(),
// 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(),
// 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());
// // Java8+ test classes
// if (atLeastJava8()) {
// String[] java8TestClassNames = {
// "Atomic8Test",
// "CompletableFutureTest",
// "ConcurrentHashMap8Test",
// "CountedCompleterTest",
// "DoubleAccumulatorTest",
// "DoubleAdderTest",
// "ForkJoinPool8Test",
// "ForkJoinTask8Test",
// "LongAccumulatorTest",
// "LongAdderTest",
// "SplittableRandomTest",
// "StampedLockTest",
// "SubmissionPublisherTest",
// "ThreadLocalRandom8Test",
// };
// addNamedTestClasses(suite, java8TestClassNames);
// }
// // Java9+ test classes
// if (atLeastJava9()) {
// String[] java9TestClassNames = {
// // Currently empty, but expecting varhandle tests
// };
// 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<String>(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 (Exception e) {
throw new Error(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 Error(name);
try {
return (Test)
Class.forName(name8)
.getMethod("testSuite", new Class[] { dataClass })
.invoke(null, data);
} catch (Exception e) {
throw new Error(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;
/**
* 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 (long) (50 * delayFactor * jtregTestTimeoutFactor);
}
/**
* 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 * 200;
}
/**
* Returns a timeout in milliseconds to be used in tests that
* verify that operations block or time out.
*/
long timeoutMillis() {
return SHORT_DELAY_MS / 4;
}
/**
* 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);
/**
* Records an exception so that it can be rethrown later in the test
* harness thread, triggering a test case failure. Only the first
* failure is recorded; subsequent calls to this method from within
* the same test have no effect.
*/
public void threadRecordFailure(Throwable t) {
System.err.println(t);
dumpTestThreads();
threadFailure.compareAndSet(null, t);
}
public void setUp() {
setDelays();
}
void tearDownFail(String format, Object... args) {
String msg = toString() + ": " + String.format(format, args);
System.err.println(msg);
dumpTestThreads();
throw new AssertionFailedError(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.getAndSet(null);
if (t != null) {
if (t instanceof Error)
throw (Error) t;
else if (t instanceof RuntimeException)
throw (RuntimeException) t;
else if (t instanceof Exception)
throw (Exception) t;
else {
AssertionFailedError afe =
new AssertionFailedError(t.toString());
afe.initCause(t);
throw afe;
}
}
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 AssertionFailedError thrown, so that
* the current testcase will fail.
*/
public void threadFail(String reason) {
try {
fail(reason);
} catch (AssertionFailedError t) {
threadRecordFailure(t);
throw t;
}
}
/**
* Just like assertTrue(b), but additionally recording (using
* threadRecordFailure) any AssertionFailedError thrown, so that
* the current testcase will fail.
*/
public void threadAssertTrue(boolean b) {
try {
assertTrue(b);
} catch (AssertionFailedError t) {
threadRecordFailure(t);
throw t;
}
}
/**
* Just like assertFalse(b), but additionally recording (using
* threadRecordFailure) any AssertionFailedError thrown, so that
* the current testcase will fail.
*/
public void threadAssertFalse(boolean b) {
try {
assertFalse(b);
} catch (AssertionFailedError t) {
threadRecordFailure(t);
throw t;
}
}
/**
* Just like assertNull(x), but additionally recording (using
* threadRecordFailure) any AssertionFailedError thrown, so that
* the current testcase will fail.
*/
public void threadAssertNull(Object x) {
try {
assertNull(x);
} catch (AssertionFailedError t) {
threadRecordFailure(t);
throw t;
}
}
/**
* Just like assertEquals(x, y), but additionally recording (using
* threadRecordFailure) any AssertionFailedError thrown, so that
* the current testcase will fail.
*/
public void threadAssertEquals(long x, long y) {
try {
assertEquals(x, y);
} catch (AssertionFailedError t) {
threadRecordFailure(t);
throw t;
}
}
/**
* Just like assertEquals(x, y), but additionally recording (using
* threadRecordFailure) any AssertionFailedError thrown, so that
* the current testcase will fail.
*/
public void threadAssertEquals(Object x, Object y) {
try {
assertEquals(x, y);
} catch (AssertionFailedError fail) {
threadRecordFailure(fail);
throw fail;
} catch (Throwable fail) {
threadUnexpectedException(fail);
}
}
/**
* Just like assertSame(x, y), but additionally recording (using
* threadRecordFailure) any AssertionFailedError thrown, so that
* the current testcase will fail.
*/
public void threadAssertSame(Object x, Object y) {
try {
assertSame(x, y);
} catch (AssertionFailedError fail) {
threadRecordFailure(fail);
throw fail;
}
}
/**
* Calls threadFail with message "should throw exception".
*/
public void threadShouldThrow() {
threadFail("should throw exception");
}
/**
* Calls threadFail with message "should throw" + exceptionName.
*/
public void threadShouldThrow(String exceptionName) {
threadFail("should throw " + exceptionName);
}
/**
* Records the given exception using {@link #threadRecordFailure},
* then rethrows the exception, wrapping it in an
* AssertionFailedError if necessary.
*/
public void threadUnexpectedException(Throwable t) {
threadRecordFailure(t);
t.printStackTrace();
if (t instanceof RuntimeException)
throw (RuntimeException) t;
else if (t instanceof Error)
throw (Error) t;
else {
AssertionFailedError afe =
new AssertionFailedError("unexpected exception: " + t);
afe.initCause(t);
throw afe;
}
}
/**
* 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.
*/
void joinPool(ExecutorService pool) {
try {
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 fail) {
threadFail("Unexpected InterruptedException");
}
}
/** Like Runnable, but with the freedom to throw anything */
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() {
// Android-change no ThreadMXBean
// ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
// System.err.println("------ stacktrace dump start ------");
// for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
// String name = info.getThreadName();
// if ("Signal Dispatcher".equals(name))
// continue;
// if ("Reference Handler".equals(name)
// && info.getLockName().startsWith("java.lang.ref.Reference$Lock"))
// continue;
// if ("Finalizer".equals(name)
// && info.getLockName().startsWith("java.lang.ref.ReferenceQueue$Lock"))
// continue;
// if ("checkForWedgedTest".equals(name))
// continue;
// System.err.print(info);
// }
// System.err.println("------ stacktrace dump end ------");
}
/**
* Checks that thread does not terminate within the default
* millisecond delay of {@code timeoutMillis()}.
*/
void assertThreadStaysAlive(Thread thread) {
assertThreadStaysAlive(thread, timeoutMillis());
}
/**
* Checks that thread does not terminate within the given millisecond delay.
*/
void assertThreadStaysAlive(Thread thread, long millis) {
try {
// No need to optimize the failing case via Thread.join.
delay(millis);
assertTrue(thread.isAlive());
} catch (InterruptedException fail) {
threadFail("Unexpected InterruptedException");
}
}
/**
* Checks that the threads do not terminate within the default
* millisecond delay of {@code timeoutMillis()}.
*/
void assertThreadsStayAlive(Thread... threads) {
assertThreadsStayAlive(timeoutMillis(), threads);
}
/**
* Checks that the threads do not terminate within the given millisecond delay.
*/
void assertThreadsStayAlive(long millis, Thread... threads) {
try {
// No need to optimize the failing case via Thread.join.
delay(millis);
for (Thread thread : threads)
assertTrue(thread.isAlive());
} catch (InterruptedException fail) {
threadFail("Unexpected InterruptedException");
}
}
/**
* 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".
*/
public void shouldThrow() {
fail("Should throw exception");
}
/**
* Fails with message "should throw " + exceptionName.
*/
public void shouldThrow(String exceptionName) {
fail("Should throw " + exceptionName);
}
/**
* 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);
/**
* Runs Runnable r with a security policy that permits precisely
* the specified permissions. If there is no current security
* manager, the runnable is run twice, both with and without a
* security manager. We require that any security manager permit
* getPolicy/setPolicy.
*/
public void runWithPermissions(Runnable r, Permission... permissions) {
// Android-changed: no SecurityManager
// SecurityManager sm = System.getSecurityManager();
// if (sm == null) {
// r.run();
// }
// runWithSecurityManagerWithPermissions(r, permissions);
r.run();
}
/**
* 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) {
// Android-changed: no SecurityManager
// SecurityManager sm = System.getSecurityManager();
// if (sm == null) {
// Policy savedPolicy = Policy.getPolicy();
// try {
// Policy.setPolicy(permissivePolicy());
// System.setSecurityManager(new SecurityManager());
// runWithSecurityManagerWithPermissions(r, permissions);
// } finally {
// System.setSecurityManager(null);
// Policy.setPolicy(savedPolicy);
// }
// } else {
// Policy savedPolicy = Policy.getPolicy();
// AdjustablePolicy policy = new AdjustablePolicy(permissions);
// Policy.setPolicy(policy);
// try {
// r.run();
// } finally {
// policy.addPermission(new SecurityPermission("setPolicy"));
// Policy.setPolicy(savedPolicy);
// }
// }
r.run();
}
/**
* Runs a runnable without any permissions.
*/
public void runWithoutPermissions(Runnable r) {
runWithPermissions(r);
}
/**
* 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(Permission... permissions) {
for (Permission permission : permissions)
perms.add(permission);
}
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() {}
public String toString() {
List<Permission> ps = new ArrayList<Permission>();
for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
ps.add(e.nextElement());
return "AdjustablePolicy with permissions " + ps;
}
}
/**
* Returns a policy containing all the permissions we ever need.
*/
public static Policy permissivePolicy() {
return new AdjustablePolicy
// Permissions j.u.c. needs directly
(new RuntimePermission("modifyThread"),
new RuntimePermission("getClassLoader"),
new RuntimePermission("setContextClassLoader"),
// Permissions needed to change permissions!
new SecurityPermission("getPolicy"),
new SecurityPermission("setPolicy"),
new RuntimePermission("setSecurityManager"),
// Permissions needed by the junit test harness
new RuntimePermission("accessDeclaredMembers"),
new PropertyPermission("*", "read"),
new java.io.FilePermission("<<ALL FILES>>", "read"));
}
/**
* Sleeps until the given time has elapsed.
* Throws AssertionFailedError if interrupted.
*/
void sleep(long millis) {
try {
delay(millis);
} catch (InterruptedException fail) {
AssertionFailedError afe =
new AssertionFailedError("Unexpected InterruptedException");
afe.initCause(fail);
throw afe;
}
}
/**
* 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 = System.nanoTime();
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 (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 AssertionFailedError("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 AssertionFailedError("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;
}
/**
* 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");
}
}
}
/**
* 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);
}
// Some convenient Runnable classes
public abstract class CheckedRunnable implements Runnable {
protected abstract void realRun() throws Throwable;
public final void run() {
try {
realRun();
} catch (Throwable fail) {
threadUnexpectedException(fail);
}
}
}
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) {
threadAssertFalse(Thread.interrupted());
} catch (Throwable fail) {
threadUnexpectedException(fail);
}
}
}
public abstract class CheckedCallable<T> implements Callable<T> {
protected abstract T realCall() throws Throwable;
public final T call() {
try {
return realCall();
} catch (Throwable fail) {
threadUnexpectedException(fail);
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) {
threadAssertFalse(Thread.interrupted());
} catch (Throwable fail) {
threadUnexpectedException(fail);
}
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> {
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>() {
protected String realCall() {
try {
latch.await();
} catch (InterruptedException quittingTime) {}
return TEST_STRING;
}};
}
public Runnable countDowner(final CountDownLatch latch) {
return new CheckedRunnable() {
public void realRun() throws InterruptedException {
latch.countDown();
}};
}
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 LatchAwaiter awaiter(CountDownLatch latch) {
return new LatchAwaiter(latch);
}
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 void await(CountDownLatch latch) {
await(latch, LONG_DELAY_MS);
}
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);
}
}
// /**
// * 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 AssertionFailedError("timed out");
// Thread.yield();
// }
// }
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 {
delay(SHORT_DELAY_MS);
}
}
public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
protected void realRun() throws InterruptedException {
delay(SHORT_DELAY_MS);
}
}
public class SmallRunnable extends CheckedRunnable {
protected void realRun() throws Throwable {
delay(SMALL_DELAY_MS);
}
}
public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
protected void realRun() {
try {
delay(SMALL_DELAY_MS);
} catch (InterruptedException ok) {}
}
}
public class SmallCallable extends CheckedCallable {
protected Object realCall() throws InterruptedException {
delay(SMALL_DELAY_MS);
return Boolean.TRUE;
}
}
public class MediumRunnable extends CheckedRunnable {
protected void realRun() throws Throwable {
delay(MEDIUM_DELAY_MS);
}
}
public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
protected void realRun() throws InterruptedException {
delay(MEDIUM_DELAY_MS);
}
}
public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
return new CheckedRunnable() {
protected void realRun() {
try {
delay(timeoutMillis);
} catch (InterruptedException ok) {}
}};
}
public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
protected void realRun() {
try {
delay(MEDIUM_DELAY_MS);
} catch (InterruptedException ok) {}
}
}
public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
protected void realRun() {
try {
delay(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 interface TrackedRunnable extends Runnable {
boolean isDone();
}
public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
return new TrackedRunnable() {
private volatile boolean done = false;
public boolean isDone() { return done; }
public void run() {
try {
delay(timeoutMillis);
done = true;
} catch (InterruptedException ok) {}
}
};
}
public static class TrackedShortRunnable implements Runnable {
public volatile boolean done = false;
public void run() {
try {
delay(SHORT_DELAY_MS);
done = true;
} catch (InterruptedException ok) {}
}
}
public static class TrackedSmallRunnable implements Runnable {
public volatile boolean done = false;
public void run() {
try {
delay(SMALL_DELAY_MS);
done = true;
} catch (InterruptedException ok) {}
}
}
public static class TrackedMediumRunnable implements Runnable {
public volatile boolean done = false;
public void run() {
try {
delay(MEDIUM_DELAY_MS);
done = true;
} catch (InterruptedException ok) {}
}
}
public static class TrackedLongRunnable implements Runnable {
public volatile boolean done = false;
public void run() {
try {
delay(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 {
delay(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;
@Override protected final void compute() {
try {
realCompute();
} catch (Throwable fail) {
threadUnexpectedException(fail);
}
}
}
/**
* Analog of CheckedCallable for RecursiveTask
*/
public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
protected abstract T realCompute() throws Throwable;
@Override protected final T compute() {
try {
return realCompute();
} catch (Throwable fail) {
threadUnexpectedException(fail);
return null;
}
}
}
/**
* For use as RejectedExecutionHandler in constructors
*/
public static class NoOpREHandler implements RejectedExecutionHandler {
public void rejectedExecution(Runnable r,
ThreadPoolExecutor executor) {}
}
/**
* A CyclicBarrier that uses timed await and fails with
* AssertionFailedErrors instead of throwing checked exceptions.
*/
public 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 AssertionFailedError("timed out");
} catch (Exception fail) {
AssertionFailedError afe =
new AssertionFailedError("Unexpected exception: " + fail);
afe.initCause(fail);
throw afe;
}
}
}
void checkEmpty(BlockingQueue q) {
try {
assertTrue(q.isEmpty());
assertEquals(0, q.size());
assertNull(q.peek());
assertNull(q.poll());
assertNull(q.poll(0, MILLISECONDS));
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];
}
}
@SuppressWarnings("unchecked")
<T> T serialClone(T o) {
try {
ObjectInputStream ois = new ObjectInputStream
(new ByteArrayInputStream(serialBytes(o)));
T clone = (T) ois.readObject();
assertSame(o.getClass(), clone.getClass());
return clone;
} catch (Throwable fail) {
threadUnexpectedException(fail);
return null;
}
}
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)) {
AssertionFailedError afe =
new AssertionFailedError
("Expected " + expectedExceptionClass.getName() +
", got " + t.getClass().getName());
afe.initCause(t);
threadUnexpectedException(afe);
}
}
if (!threw)
shouldThrow(expectedExceptionClass.getName());
}
}
public void assertIteratorExhausted(Iterator<?> it) {
try {
it.next();
shouldThrow();
} catch (NoSuchElementException success) {}
assertFalse(it.hasNext());
}
}