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/* |
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* Written by members of JCP JSR-166 Expert Group and released to the |
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* public domain. Use, modify, and redistribute this code in any way |
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* without acknowledgement. Other contributors include Andrew Wright, |
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* Jeffrey Hayes, Pat Fischer, Mike Judd. |
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*/ |
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import junit.framework.*; |
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import java.util.*; |
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import java.util.concurrent.*; |
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import java.io.*; |
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/** |
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* Base class for JSR166 Junit TCK tests. Defines some constants and |
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* utility methods, as well as a simple framework for helping to make |
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* sure that assertions failing in generated threads cause the |
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* associated test that generated them to itself fail (which JUnit doe |
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* not otherwise arrange). The rules for creating such tests are: |
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* |
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* <ol> |
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* |
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* <li> All assertions in code running in generated threads must use |
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* the forms {@link threadFail} , {@link threadAssertTrue} {@link |
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* threadAssertEquals}, or {@link threadAssertNull}, (not |
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* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not |
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* particularly recommended) for other code to use these forms too. |
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* Only the most typically used JUnit assertion methods are defined |
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* this way, but enough to live with.</li> |
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* |
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* <li> If you override {@link setUp} or {@link tearDown}, make sure |
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* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within |
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* them. These methods are used to clear and check for thread |
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* assertion failures.</li> |
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* |
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* <li>All delays and timeouts must use one of the constants {@link |
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* SHORT_DELAY_MS}, {@link SMALL_DELAY_MS}, {@link MEDIUM_DELAY_MS}, |
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* {@link LONG_DELAY_MS}. The idea here is that a SHORT is always |
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* discriminatable from zero time, and always allows enough time for |
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* the small amounts of computation (creating a thread, calling a few |
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* methods, etc) needed to reach a timeout point. Similarly, a SMALL |
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* is always discriminable as larger than SHORT and smaller than |
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* MEDIUM. And so on. These constants are set to conservative values, |
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* (100, 500, 1000, 5000 MS) but even so, if there is ever any doubt, |
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* they can all be increased in one spot to rerun tests on slower |
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* platforms</li> |
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* |
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* <li> All threads generated must be joined inside each test case |
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* method (or <tt>fail</tt> to do so) before returning from the |
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* method. The {@link joinPool} method can be used to do this when |
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* using Executors.</li> |
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* |
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* </ol> |
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*/ |
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public class JSR166TestCase extends TestCase { |
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/** |
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* Flag set true if any threadAssert methods fail |
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*/ |
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protected volatile boolean threadFailed; |
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/** |
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* Initialize test to indicat that no thread assertions have failed |
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*/ |
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public void setUp() { |
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threadFailed = false; |
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} |
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/** |
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* Trigger test case failure if any thread assertions have failed |
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*/ |
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public void tearDown() { |
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assertFalse(threadFailed); |
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} |
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public void threadFail(String reason) { |
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threadFailed = true; |
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fail(reason); |
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} |
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public void threadAssertTrue(boolean b) { |
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if (!b) { |
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threadFailed = true; |
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assertTrue(b); |
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} |
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} |
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public void threadAssertFalse(boolean b) { |
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if (b) { |
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threadFailed = true; |
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assertFalse(b); |
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} |
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} |
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public void threadAssertNull(Object x) { |
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if (x != null) { |
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threadFailed = true; |
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assertNull(x); |
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} |
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} |
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public void threadAssertEquals(long x, long y) { |
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if (x != y) { |
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threadFailed = true; |
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assertEquals(x, y); |
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} |
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} |
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public void threadAssertEquals(Object x, Object y) { |
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if (x != y && (x == null || !x.equals(y))) { |
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threadFailed = true; |
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assertEquals(x, y); |
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} |
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} |
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/** |
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* Wait out termination of a thread pool or fail doing so |
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*/ |
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public void joinPool(ExecutorService exec) { |
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try { |
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exec.shutdown(); |
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assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS)); |
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} catch(InterruptedException ie) { |
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fail("unexpected exception"); |
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} |
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} |
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public static final long SHORT_DELAY_MS = 100; |
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public static final long SMALL_DELAY_MS = 500; |
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public static final long MEDIUM_DELAY_MS = 1000; |
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public static final long LONG_DELAY_MS = 5000; |
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/** |
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* The number of elements to place in collections, arrays, etc. |
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*/ |
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public static final int SIZE = 20; |
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// Some convenient Integer constants |
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public static final Integer zero = new Integer(0); |
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public static final Integer one = new Integer(1); |
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public static final Integer two = new Integer(2); |
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public static final Integer three = new Integer(3); |
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public static final Integer four = new Integer(4); |
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public static final Integer five = new Integer(5); |
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public static final Integer six = new Integer(6); |
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public static final Integer seven = new Integer(7); |
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public static final Integer eight = new Integer(8); |
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public static final Integer nine = new Integer(9); |
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public static final Integer m1 = new Integer(-1); |
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public static final Integer m2 = new Integer(-2); |
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public static final Integer m3 = new Integer(-3); |
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public static final Integer m4 = new Integer(-4); |
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public static final Integer m5 = new Integer(-5); |
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public static final Integer m10 = new Integer(-10); |
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// Some convenient Runnable classes |
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public static class NoOpRunnable implements Runnable { |
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public void run() {} |
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} |
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public static class NoOpCallable implements Callable { |
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public Object call() { return Boolean.TRUE; } |
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} |
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public class ShortRunnable implements Runnable { |
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public void run() { |
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try { |
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Thread.sleep(SHORT_DELAY_MS); |
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} |
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catch(Exception e) { |
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threadFail("unexpectedException"); |
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} |
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} |
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} |
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public class ShortInterruptedRunnable implements Runnable { |
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public void run() { |
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try { |
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Thread.sleep(SHORT_DELAY_MS); |
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threadFail("should throw IE"); |
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} |
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catch(InterruptedException success) { |
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} |
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} |
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} |
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public class SmallRunnable implements Runnable { |
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public void run() { |
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try { |
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Thread.sleep(SMALL_DELAY_MS); |
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} |
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catch(Exception e) { |
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threadFail("unexpectedException"); |
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} |
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} |
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} |
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public class SmallCallable implements Callable { |
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public Object call() { |
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try { |
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Thread.sleep(SMALL_DELAY_MS); |
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} |
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catch(Exception e) { |
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threadFail("unexpectedException"); |
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} |
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return Boolean.TRUE; |
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} |
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} |
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public class SmallInterruptedRunnable implements Runnable { |
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public void run() { |
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try { |
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Thread.sleep(SMALL_DELAY_MS); |
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threadFail("should throw IE"); |
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} |
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catch(InterruptedException success) { |
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} |
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} |
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} |
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public class MediumRunnable implements Runnable { |
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public void run() { |
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try { |
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Thread.sleep(MEDIUM_DELAY_MS); |
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} |
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catch(Exception e) { |
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threadFail("unexpectedException"); |
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} |
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} |
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} |
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public class MediumInterruptedRunnable implements Runnable { |
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public void run() { |
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try { |
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Thread.sleep(MEDIUM_DELAY_MS); |
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threadFail("should throw IE"); |
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} |
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catch(InterruptedException success) { |
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} |
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} |
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} |
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public class MediumPossiblyInterruptedRunnable implements Runnable { |
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public void run() { |
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try { |
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Thread.sleep(MEDIUM_DELAY_MS); |
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} |
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catch(InterruptedException success) { |
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} |
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} |
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} |
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} |