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android / platform / libcore / 71f2c75111e87091616f0f3b86bea6c4d345dad1 / . / test / jdk / java / util / concurrent / tck / JSR166TestCase.java
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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* This file is available under and governed by the GNU General Public
* License version 2 only, as published by the Free Software Foundation.
* However, the following notice accompanied the original version of this
* file:
*
* 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.
*/
/*
* @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.Permissions;
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.Deque;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.PropertyPermission;
import java.util.Set;
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,
* 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);
/**
* 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());
}
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");
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; }
public static boolean atLeastJava11() { return JAVA_CLASS_VERSION >= 55.0; }
/**
* Collects all JSR166 unit tests as one suite.
*/
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(),
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 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);
}
/**
* 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;
}
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<>(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 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.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
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.
*/
public void threadFail(String reason) {
try {
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.
*/
public void threadAssertTrue(boolean b) {
try {
assertTrue(b);
} catch (AssertionError fail) {
threadRecordFailure(fail);
throw fail;
}
}
/**
* Just like assertFalse(b), but additionally recording (using
* threadRecordFailure) any AssertionError thrown, so that the
* current testcase will fail.
*/
public void threadAssertFalse(boolean b) {
try {
assertFalse(b);
} catch (AssertionError fail) {
threadRecordFailure(fail);
throw fail;
}
}
/**
* Just like assertNull(x), but additionally recording (using
* threadRecordFailure) any AssertionError thrown, so that the
* current testcase will fail.
*/
public void threadAssertNull(Object x) {
try {
assertNull(x);
} catch (AssertionError fail) {
threadRecordFailure(fail);
throw fail;
}
}
/**
* Just like assertEquals(x, y), but additionally recording (using
* threadRecordFailure) any AssertionError thrown, so that the
* current testcase will fail.
*/
public void threadAssertEquals(long x, long y) {
try {
assertEquals(x, y);
} catch (AssertionError fail) {
threadRecordFailure(fail);
throw fail;
}
}
/**
* Just like assertEquals(x, y), but additionally recording (using
* threadRecordFailure) any AssertionError thrown, so that the
* current testcase will fail.
*/
public void threadAssertEquals(Object x, Object y) {
try {
assertEquals(x, y);
} catch (AssertionError fail) {
threadRecordFailure(fail);
throw fail;
} catch (Throwable fail) {
threadUnexpectedException(fail);
}
}
/**
* Just like assertSame(x, y), but additionally recording (using
* threadRecordFailure) any AssertionError thrown, so that the
* current testcase will fail.
*/
public void threadAssertSame(Object x, Object y) {
try {
assertSame(x, y);
} catch (AssertionError 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 AssertionError
* 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
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.
*/
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.
* 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".
*/
public void shouldThrow() {
fail("Should throw exception");
}
/**
* Fails with message "should throw " + exceptionName.
*/
public void shouldThrow(String exceptionName) {
fail("Should throw " + exceptionName);
}
/**
* The maximum number of consecutive spurious wakeups we should
* tolerate (from APIs like LockSupport.park) before failing a test.
*/
static final int MAX_SPURIOUS_WAKEUPS = 10;
/**
* 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) {
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());
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);
}
}
}
/**
* 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<>();
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 AssertionError if interrupted.
*/
static void sleep(long millis) {
try {
delay(millis);
} catch (InterruptedException fail) {
throw new AssertionError("Unexpected InterruptedException", fail);
}
}
/**
* 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;
}
/**
* 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 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);
}
}
public void await(CyclicBarrier barrier) {
try {
barrier.await(LONG_DELAY_MS, MILLISECONDS);
} 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 AssertionError("timed out");
// Thread.yield();
// }
// }
public static class NPETask implements Callable<String> {
public String call() { throw new NullPointerException(); }
}
public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
protected void realRun() {
try {
delay(SMALL_DELAY_MS);
} catch (InterruptedException ok) {}
}
}
public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
return new CheckedRunnable() {
protected void realRun() {
try {
delay(timeoutMillis);
} 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 class TrackedNoOpRunnable implements Runnable {
public volatile boolean done = false;
public void run() {
done = 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
* 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,
1000L, 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());
}
void assertCollectionsEquals(Collection<?> x, Collection<?> y) {
assertEquals(x, y);
assertEquals(y, x);
assertEquals(x.isEmpty(), y.isEmpty());
assertEquals(x.size(), y.size());
if (x instanceof List) {
assertEquals(x.toString(), y.toString());
}
if (x instanceof List || x instanceof Set) {
assertEquals(x.hashCode(), y.hashCode());
}
if (x instanceof List || x instanceof Deque) {
assertTrue(Arrays.equals(x.toArray(), y.toArray()));
assertTrue(Arrays.equals(x.toArray(new Object[0]),
y.toArray(new Object[0])));
}
}
/**
* A weaker form of assertCollectionsEquals which does not insist
* that the two collections satisfy Object#equals(Object), since
* they may use identity semantics as Deques do.
*/
void assertCollectionsEquivalent(Collection<?> x, Collection<?> y) {
if (x instanceof List || x instanceof Set)
assertCollectionsEquals(x, y);
else {
assertEquals(x.isEmpty(), y.isEmpty());
assertEquals(x.size(), y.size());
assertEquals(new HashSet(x), new HashSet(y));
if (x instanceof Deque) {
assertTrue(Arrays.equals(x.toArray(), y.toArray()));
assertTrue(Arrays.equals(x.toArray(new Object[0]),
y.toArray(new Object[0])));
}
}
}
}