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* Pat Fisher, 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 static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import java.util.ArrayList; |
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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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|
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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|
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/** |
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* Contains tests generally applicable to BlockingQueue implementations. |
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* Contains "contract" tests applicable to all BlockingQueue implementations. |
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*/ |
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public abstract class BlockingQueueTest extends JSR166TestCase { |
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/* |
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return new TestSuite(this.getClass()); |
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} |
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|
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//---------------------------------------------------------------- |
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// Configuration methods |
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//---------------------------------------------------------------- |
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|
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/** Returns an empty instance of the implementation class. */ |
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protected abstract BlockingQueue emptyCollection(); |
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|
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/** |
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* 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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//---------------------------------------------------------------- |
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// Tests |
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//---------------------------------------------------------------- |
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|
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/** |
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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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/** |
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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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/** |
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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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/** |
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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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/** |
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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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/** |
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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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/** |
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* toArray(null) throws NullPointerException |
133 |
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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) {} |
140 |
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} |
141 |
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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 { |
148 |
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q.drainTo(null); |
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shouldThrow(); |
150 |
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} catch (NullPointerException success) {} |
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} |
152 |
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|
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/** |
154 |
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* drainTo(this) throws IllegalArgumentException |
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*/ |
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public void testDrainToSelf() { |
157 |
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final BlockingQueue q = emptyCollection(); |
158 |
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try { |
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q.drainTo(q); |
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shouldThrow(); |
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} catch (IllegalArgumentException success) {} |
162 |
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} |
163 |
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|
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/** |
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* drainTo(null, n) throws NullPointerException |
166 |
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*/ |
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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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} |
174 |
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|
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/** |
176 |
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* drainTo(this, n) throws IllegalArgumentException |
177 |
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*/ |
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public void testDrainToSelfN() { |
179 |
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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 |
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* drainTo(c, n) returns 0 and does nothing when n <= 0 |
188 |
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*/ |
189 |
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public void testDrainToNonPositiveMaxElements() { |
190 |
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final BlockingQueue q = emptyCollection(); |
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final int[] ns = { 0, -1, -42, Integer.MIN_VALUE }; |
192 |
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for (int n : ns) |
193 |
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assertEquals(0, q.drainTo(new ArrayList(), n)); |
194 |
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if (q.remainingCapacity() > 0) { |
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// Not SynchronousQueue, that is |
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Object one = makeElement(1); |
197 |
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q.add(one); |
198 |
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ArrayList c = new ArrayList(); |
199 |
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for (int n : ns) |
200 |
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assertEquals(0, q.drainTo(new ArrayList(), n)); |
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assertEquals(1, q.size()); |
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assertSame(one, q.poll()); |
203 |
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assertTrue(c.isEmpty()); |
204 |
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} |
205 |
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} |
206 |
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|
207 |
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/** |
208 |
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* timed poll before a delayed offer times out; after offer succeeds; |
209 |
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* 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(); |
213 |
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final CheckedBarrier barrier = new CheckedBarrier(2); |
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final Object zero = makeElement(0); |
215 |
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Thread t = newStartedThread(new CheckedRunnable() { |
216 |
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public void realRun() throws InterruptedException { |
217 |
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long startTime = System.nanoTime(); |
235 |
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shouldThrow(); |
236 |
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} catch (InterruptedException success) {} |
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assertFalse(Thread.interrupted()); |
238 |
+ |
|
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assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
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}}); |
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|
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barrier.await(); |
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awaitTermination(t); |
333 |
|
} |
334 |
|
|
335 |
+ |
/** |
336 |
+ |
* remove(x) removes x and returns true if present |
337 |
+ |
* TODO: move to superclass CollectionTest.java |
338 |
+ |
*/ |
339 |
+ |
public void testRemoveElement() { |
340 |
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final BlockingQueue q = emptyCollection(); |
341 |
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final int size = Math.min(q.remainingCapacity(), SIZE); |
342 |
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final Object[] elts = new Object[size]; |
343 |
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assertFalse(q.contains(makeElement(99))); |
344 |
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assertFalse(q.remove(makeElement(99))); |
345 |
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checkEmpty(q); |
346 |
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for (int i = 0; i < size; i++) |
347 |
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q.add(elts[i] = makeElement(i)); |
348 |
+ |
for (int i = 1; i < size; i += 2) { |
349 |
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for (int pass = 0; pass < 2; pass++) { |
350 |
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assertEquals((pass == 0), q.contains(elts[i])); |
351 |
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assertEquals((pass == 0), q.remove(elts[i])); |
352 |
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assertFalse(q.contains(elts[i])); |
353 |
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assertTrue(q.contains(elts[i - 1])); |
354 |
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if (i < size - 1) |
355 |
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assertTrue(q.contains(elts[i + 1])); |
356 |
+ |
} |
357 |
+ |
} |
358 |
+ |
if (size > 0) |
359 |
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assertTrue(q.contains(elts[0])); |
360 |
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for (int i = size - 2; i >= 0; i -= 2) { |
361 |
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assertTrue(q.contains(elts[i])); |
362 |
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assertFalse(q.contains(elts[i + 1])); |
363 |
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assertTrue(q.remove(elts[i])); |
364 |
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assertFalse(q.contains(elts[i])); |
365 |
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assertFalse(q.remove(elts[i + 1])); |
366 |
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assertFalse(q.contains(elts[i + 1])); |
367 |
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} |
368 |
+ |
checkEmpty(q); |
369 |
+ |
} |
370 |
+ |
|
371 |
|
/** For debugging. */ |
372 |
|
public void XXXXtestFails() { |
373 |
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fail(emptyCollection().getClass().toString()); |