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jsr166 |
1.1 |
/* |
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* Written by Doug Lea and Martin Buchholz with assistance from members |
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* of JCP JSR-166 Expert Group and released to the public domain, as |
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jsr166 |
1.5 |
* explained at http://creativecommons.org/publicdomain/zero/1.0/ |
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jsr166 |
1.1 |
* |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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*/ |
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jsr166 |
1.13 |
import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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jsr166 |
1.10 |
import java.util.ArrayList; |
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jsr166 |
1.8 |
import java.util.Arrays; |
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import java.util.Collection; |
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import java.util.Queue; |
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import java.util.concurrent.BlockingQueue; |
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import java.util.concurrent.CountDownLatch; |
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jsr166 |
1.13 |
|
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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jsr166 |
1.1 |
|
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/** |
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jsr166 |
1.8 |
* Contains "contract" tests applicable to all BlockingQueue implementations. |
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jsr166 |
1.1 |
*/ |
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public abstract class BlockingQueueTest extends JSR166TestCase { |
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/* |
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* This is the start of an attempt to refactor the tests for the |
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* various related implementations of related interfaces without |
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* too much duplicated code. junit does not really support such |
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* testing. Here subclasses of TestCase not only contain tests, |
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* but also configuration information that describes the |
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* implementation class, most importantly how to instantiate |
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* instances. |
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*/ |
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/** Like suite(), but non-static */ |
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public Test testSuite() { |
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// TODO: filter the returned tests using the configuration |
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// information provided by the subclass via protected methods. |
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return new TestSuite(this.getClass()); |
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} |
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jsr166 |
1.8 |
//---------------------------------------------------------------- |
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// Configuration methods |
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//---------------------------------------------------------------- |
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jsr166 |
1.9 |
|
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jsr166 |
1.1 |
/** Returns an empty instance of the implementation class. */ |
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protected abstract BlockingQueue emptyCollection(); |
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/** |
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jsr166 |
1.8 |
* Returns an element suitable for insertion in the collection. |
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* Override for collections with unusual element types. |
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*/ |
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protected Object makeElement(int i) { |
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return Integer.valueOf(i); |
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} |
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//---------------------------------------------------------------- |
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// Tests |
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//---------------------------------------------------------------- |
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jsr166 |
1.9 |
|
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jsr166 |
1.8 |
/** |
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* offer(null) throws NullPointerException |
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*/ |
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public void testOfferNull() { |
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final Queue q = emptyCollection(); |
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try { |
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q.offer(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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/** |
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* add(null) throws NullPointerException |
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*/ |
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public void testAddNull() { |
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final Collection q = emptyCollection(); |
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try { |
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q.add(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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/** |
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* timed offer(null) throws NullPointerException |
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*/ |
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public void testTimedOfferNull() throws InterruptedException { |
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final BlockingQueue q = emptyCollection(); |
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long startTime = System.nanoTime(); |
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try { |
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q.offer(null, LONG_DELAY_MS, MILLISECONDS); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
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} |
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/** |
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* put(null) throws NullPointerException |
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*/ |
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public void testPutNull() throws InterruptedException { |
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final BlockingQueue q = emptyCollection(); |
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try { |
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q.put(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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/** |
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* put(null) throws NullPointerException |
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*/ |
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public void testAddAllNull() throws InterruptedException { |
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final Collection q = emptyCollection(); |
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try { |
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q.addAll(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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/** |
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* addAll of a collection with null elements throws NullPointerException |
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*/ |
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public void testAddAllNullElements() { |
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final Collection q = emptyCollection(); |
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final Collection<Integer> elements = Arrays.asList(new Integer[SIZE]); |
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try { |
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q.addAll(elements); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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/** |
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* toArray(null) throws NullPointerException |
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*/ |
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public void testToArray_NullArray() { |
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final Collection q = emptyCollection(); |
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try { |
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q.toArray(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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/** |
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* drainTo(null) throws NullPointerException |
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*/ |
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public void testDrainToNull() { |
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final BlockingQueue q = emptyCollection(); |
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try { |
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q.drainTo(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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/** |
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* drainTo(this) throws IllegalArgumentException |
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*/ |
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public void testDrainToSelf() { |
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final BlockingQueue q = emptyCollection(); |
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try { |
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q.drainTo(q); |
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shouldThrow(); |
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} catch (IllegalArgumentException success) {} |
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} |
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/** |
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* drainTo(null, n) throws NullPointerException |
166 |
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*/ |
167 |
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public void testDrainToNullN() { |
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final BlockingQueue q = emptyCollection(); |
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try { |
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q.drainTo(null, 0); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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/** |
176 |
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* drainTo(this, n) throws IllegalArgumentException |
177 |
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*/ |
178 |
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public void testDrainToSelfN() { |
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final BlockingQueue q = emptyCollection(); |
180 |
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try { |
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q.drainTo(q, 0); |
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shouldThrow(); |
183 |
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} catch (IllegalArgumentException success) {} |
184 |
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} |
185 |
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186 |
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/** |
187 |
jsr166 |
1.11 |
* drainTo(c, n) returns 0 and does nothing when n <= 0 |
188 |
jsr166 |
1.10 |
*/ |
189 |
jsr166 |
1.11 |
public void testDrainToNonPositiveMaxElements() { |
190 |
jsr166 |
1.10 |
final BlockingQueue q = emptyCollection(); |
191 |
jsr166 |
1.11 |
final int[] ns = { 0, -1, -42, Integer.MIN_VALUE }; |
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for (int n : ns) |
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assertEquals(0, q.drainTo(new ArrayList(), n)); |
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if (q.remainingCapacity() > 0) { |
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// Not SynchronousQueue, that is |
196 |
jsr166 |
1.10 |
Object one = makeElement(1); |
197 |
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q.add(one); |
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ArrayList c = new ArrayList(); |
199 |
jsr166 |
1.11 |
for (int n : ns) |
200 |
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assertEquals(0, q.drainTo(new ArrayList(), n)); |
201 |
jsr166 |
1.10 |
assertEquals(1, q.size()); |
202 |
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assertSame(one, q.poll()); |
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assertTrue(c.isEmpty()); |
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} |
205 |
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} |
206 |
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207 |
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/** |
208 |
jsr166 |
1.7 |
* timed poll before a delayed offer times out; after offer succeeds; |
209 |
jsr166 |
1.1 |
* on interruption throws |
210 |
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*/ |
211 |
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public void testTimedPollWithOffer() throws InterruptedException { |
212 |
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final BlockingQueue q = emptyCollection(); |
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final CheckedBarrier barrier = new CheckedBarrier(2); |
214 |
jsr166 |
1.8 |
final Object zero = makeElement(0); |
215 |
jsr166 |
1.1 |
Thread t = newStartedThread(new CheckedRunnable() { |
216 |
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public void realRun() throws InterruptedException { |
217 |
jsr166 |
1.7 |
long startTime = System.nanoTime(); |
218 |
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assertNull(q.poll(timeoutMillis(), MILLISECONDS)); |
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assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
220 |
jsr166 |
1.1 |
|
221 |
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barrier.await(); |
222 |
jsr166 |
1.7 |
|
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assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
224 |
jsr166 |
1.1 |
|
225 |
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Thread.currentThread().interrupt(); |
226 |
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try { |
227 |
jsr166 |
1.7 |
q.poll(LONG_DELAY_MS, MILLISECONDS); |
228 |
jsr166 |
1.1 |
shouldThrow(); |
229 |
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} catch (InterruptedException success) {} |
230 |
jsr166 |
1.7 |
assertFalse(Thread.interrupted()); |
231 |
jsr166 |
1.1 |
|
232 |
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barrier.await(); |
233 |
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try { |
234 |
jsr166 |
1.7 |
q.poll(LONG_DELAY_MS, MILLISECONDS); |
235 |
jsr166 |
1.1 |
shouldThrow(); |
236 |
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} catch (InterruptedException success) {} |
237 |
jsr166 |
1.7 |
assertFalse(Thread.interrupted()); |
238 |
jsr166 |
1.1 |
}}); |
239 |
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240 |
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barrier.await(); |
241 |
jsr166 |
1.7 |
long startTime = System.nanoTime(); |
242 |
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assertTrue(q.offer(zero, LONG_DELAY_MS, MILLISECONDS)); |
243 |
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assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
244 |
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245 |
jsr166 |
1.1 |
barrier.await(); |
246 |
jsr166 |
1.7 |
assertThreadStaysAlive(t); |
247 |
jsr166 |
1.1 |
t.interrupt(); |
248 |
jsr166 |
1.7 |
awaitTermination(t); |
249 |
jsr166 |
1.1 |
} |
250 |
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|
251 |
jsr166 |
1.2 |
/** |
252 |
jsr166 |
1.3 |
* take() blocks interruptibly when empty |
253 |
jsr166 |
1.2 |
*/ |
254 |
jsr166 |
1.7 |
public void testTakeFromEmptyBlocksInterruptibly() { |
255 |
jsr166 |
1.2 |
final BlockingQueue q = emptyCollection(); |
256 |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
257 |
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Thread t = newStartedThread(new CheckedRunnable() { |
258 |
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public void realRun() { |
259 |
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threadStarted.countDown(); |
260 |
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try { |
261 |
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q.take(); |
262 |
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shouldThrow(); |
263 |
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} catch (InterruptedException success) {} |
264 |
jsr166 |
1.7 |
assertFalse(Thread.interrupted()); |
265 |
jsr166 |
1.2 |
}}); |
266 |
jsr166 |
1.3 |
|
267 |
jsr166 |
1.7 |
await(threadStarted); |
268 |
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assertThreadStaysAlive(t); |
269 |
jsr166 |
1.2 |
t.interrupt(); |
270 |
jsr166 |
1.7 |
awaitTermination(t); |
271 |
jsr166 |
1.3 |
} |
272 |
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273 |
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/** |
274 |
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* take() throws InterruptedException immediately if interrupted |
275 |
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* before waiting |
276 |
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*/ |
277 |
jsr166 |
1.7 |
public void testTakeFromEmptyAfterInterrupt() { |
278 |
jsr166 |
1.3 |
final BlockingQueue q = emptyCollection(); |
279 |
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Thread t = newStartedThread(new CheckedRunnable() { |
280 |
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public void realRun() { |
281 |
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Thread.currentThread().interrupt(); |
282 |
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try { |
283 |
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q.take(); |
284 |
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shouldThrow(); |
285 |
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} catch (InterruptedException success) {} |
286 |
jsr166 |
1.7 |
assertFalse(Thread.interrupted()); |
287 |
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}}); |
288 |
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289 |
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awaitTermination(t); |
290 |
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} |
291 |
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|
292 |
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/** |
293 |
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* timed poll() blocks interruptibly when empty |
294 |
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*/ |
295 |
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public void testTimedPollFromEmptyBlocksInterruptibly() { |
296 |
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final BlockingQueue q = emptyCollection(); |
297 |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
298 |
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Thread t = newStartedThread(new CheckedRunnable() { |
299 |
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public void realRun() { |
300 |
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threadStarted.countDown(); |
301 |
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try { |
302 |
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q.poll(2 * LONG_DELAY_MS, MILLISECONDS); |
303 |
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shouldThrow(); |
304 |
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} catch (InterruptedException success) {} |
305 |
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assertFalse(Thread.interrupted()); |
306 |
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}}); |
307 |
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308 |
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await(threadStarted); |
309 |
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assertThreadStaysAlive(t); |
310 |
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t.interrupt(); |
311 |
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awaitTermination(t); |
312 |
|
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} |
313 |
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|
314 |
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/** |
315 |
|
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* timed poll() throws InterruptedException immediately if |
316 |
|
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* interrupted before waiting |
317 |
|
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*/ |
318 |
|
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public void testTimedPollFromEmptyAfterInterrupt() { |
319 |
|
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final BlockingQueue q = emptyCollection(); |
320 |
|
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Thread t = newStartedThread(new CheckedRunnable() { |
321 |
|
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public void realRun() { |
322 |
|
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Thread.currentThread().interrupt(); |
323 |
|
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try { |
324 |
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q.poll(2 * LONG_DELAY_MS, MILLISECONDS); |
325 |
|
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shouldThrow(); |
326 |
|
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} catch (InterruptedException success) {} |
327 |
|
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assertFalse(Thread.interrupted()); |
328 |
jsr166 |
1.3 |
}}); |
329 |
|
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|
330 |
jsr166 |
1.7 |
awaitTermination(t); |
331 |
jsr166 |
1.2 |
} |
332 |
|
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|
333 |
jsr166 |
1.12 |
/** |
334 |
|
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* remove(x) removes x and returns true if present |
335 |
|
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* TODO: move to superclass CollectionTest.java |
336 |
|
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*/ |
337 |
|
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public void testRemoveElement() { |
338 |
|
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final BlockingQueue q = emptyCollection(); |
339 |
|
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final int size = Math.min(q.remainingCapacity(), SIZE); |
340 |
|
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final Object[] elts = new Object[size]; |
341 |
|
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assertFalse(q.contains(makeElement(99))); |
342 |
|
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assertFalse(q.remove(makeElement(99))); |
343 |
|
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checkEmpty(q); |
344 |
|
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for (int i = 0; i < size; i++) |
345 |
|
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q.add(elts[i] = makeElement(i)); |
346 |
|
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for (int i = 1; i < size; i+=2) { |
347 |
|
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for (int pass = 0; pass < 2; pass++) { |
348 |
|
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assertEquals((pass == 0), q.contains(elts[i])); |
349 |
|
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assertEquals((pass == 0), q.remove(elts[i])); |
350 |
|
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assertFalse(q.contains(elts[i])); |
351 |
|
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assertTrue(q.contains(elts[i-1])); |
352 |
|
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if (i < size - 1) |
353 |
|
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assertTrue(q.contains(elts[i+1])); |
354 |
|
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} |
355 |
|
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} |
356 |
|
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if (size > 0) |
357 |
|
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assertTrue(q.contains(elts[0])); |
358 |
|
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for (int i = size-2; i >= 0; i-=2) { |
359 |
|
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assertTrue(q.contains(elts[i])); |
360 |
|
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assertFalse(q.contains(elts[i+1])); |
361 |
|
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assertTrue(q.remove(elts[i])); |
362 |
|
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assertFalse(q.contains(elts[i])); |
363 |
|
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assertFalse(q.remove(elts[i+1])); |
364 |
|
|
assertFalse(q.contains(elts[i+1])); |
365 |
|
|
} |
366 |
|
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checkEmpty(q); |
367 |
|
|
} |
368 |
|
|
|
369 |
jsr166 |
1.1 |
/** For debugging. */ |
370 |
|
|
public void XXXXtestFails() { |
371 |
|
|
fail(emptyCollection().getClass().toString()); |
372 |
|
|
} |
373 |
|
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|
374 |
|
|
} |