--- jsr166/src/test/tck/PriorityQueueTest.java 2010/08/25 00:07:03 1.16 +++ jsr166/src/test/tck/PriorityQueueTest.java 2021/01/26 13:33:06 1.48 @@ -1,43 +1,70 @@ /* * Written by Doug Lea with assistance from members of JCP JSR-166 * Expert Group and released to the public domain, as explained at - * http://creativecommons.org/licenses/publicdomain + * http://creativecommons.org/publicdomain/zero/1.0/ * Other contributors include Andrew Wright, Jeffrey Hayes, * Pat Fisher, Mike Judd. */ -import junit.framework.*; -import java.util.*; -import java.util.concurrent.*; -import java.io.*; +import java.util.Arrays; +import java.util.Collection; +import java.util.Comparator; +import java.util.Iterator; +import java.util.NoSuchElementException; +import java.util.PriorityQueue; +import java.util.Queue; + +import junit.framework.Test; public class PriorityQueueTest extends JSR166TestCase { public static void main(String[] args) { - junit.textui.TestRunner.run(suite()); + main(suite(), args); } public static Test suite() { - return new TestSuite(PriorityQueueTest.class); + class Implementation implements CollectionImplementation { + public Class klazz() { return PriorityQueue.class; } + public Collection emptyCollection() { return new PriorityQueue(); } + public Object makeElement(int i) { return JSR166TestCase.itemFor(i); } + public boolean isConcurrent() { return false; } + public boolean permitsNulls() { return false; } + } + class ComparatorImplementation implements CollectionImplementation { + public Class klazz() { return PriorityQueue.class; } + @SuppressWarnings("unchecked") + public Collection emptyCollection() { + return new PriorityQueue(new MyReverseComparator()); + } + public Object makeElement(int i) { return JSR166TestCase.itemFor(i); } + public boolean isConcurrent() { return false; } + public boolean permitsNulls() { return false; } + } + return newTestSuite( + PriorityQueueTest.class, + CollectionTest.testSuite(new Implementation()), + CollectionTest.testSuite(new ComparatorImplementation())); } - static class MyReverseComparator implements Comparator { + static class MyReverseComparator implements Comparator, java.io.Serializable { + @SuppressWarnings("unchecked") public int compare(Object x, Object y) { return ((Comparable)y).compareTo(x); } } /** - * Create a queue of given size containing consecutive - * Integers 0 ... n. + * Returns a new queue of given size containing consecutive + * Items 0 ... n - 1. */ - private PriorityQueue populatedQueue(int n) { - PriorityQueue q = new PriorityQueue(n); + private static PriorityQueue populatedQueue(int n) { + PriorityQueue q = new PriorityQueue<>(n); assertTrue(q.isEmpty()); - for (int i = n-1; i >= 0; i-=2) - assertTrue(q.offer(new Integer(i))); - for (int i = (n & 1); i < n; i+=2) - assertTrue(q.offer(new Integer(i))); + for (int i = n - 1; i >= 0; i -= 2) + mustOffer(q, i); + for (int i = (n & 1); i < n; i += 2) + mustOffer(q, i); assertFalse(q.isEmpty()); - assertEquals(n, q.size()); + mustEqual(n, q.size()); + mustEqual(0, q.peek()); return q; } @@ -45,15 +72,15 @@ public class PriorityQueueTest extends J * A new queue has unbounded capacity */ public void testConstructor1() { - assertEquals(0, new PriorityQueue(SIZE).size()); + mustEqual(0, new PriorityQueue(SIZE).size()); } /** - * Constructor throws IAE if capacity argument nonpositive + * Constructor throws IllegalArgumentException if capacity argument nonpositive */ public void testConstructor2() { try { - PriorityQueue q = new PriorityQueue(0); + new PriorityQueue(0); shouldThrow(); } catch (IllegalArgumentException success) {} } @@ -63,7 +90,7 @@ public class PriorityQueueTest extends J */ public void testConstructor3() { try { - PriorityQueue q = new PriorityQueue((Collection)null); + new PriorityQueue((Collection)null); shouldThrow(); } catch (NullPointerException success) {} } @@ -73,8 +100,7 @@ public class PriorityQueueTest extends J */ public void testConstructor4() { try { - Integer[] ints = new Integer[SIZE]; - PriorityQueue q = new PriorityQueue(Arrays.asList(ints)); + new PriorityQueue(Arrays.asList(new Item[SIZE])); shouldThrow(); } catch (NullPointerException success) {} } @@ -83,11 +109,10 @@ public class PriorityQueueTest extends J * Initializing from Collection with some null elements throws NPE */ public void testConstructor5() { + Item[] items = new Item[2]; + items[0] = zero; try { - Integer[] ints = new Integer[SIZE]; - for (int i = 0; i < SIZE-1; ++i) - ints[i] = new Integer(i); - PriorityQueue q = new PriorityQueue(Arrays.asList(ints)); + new PriorityQueue(Arrays.asList(items)); shouldThrow(); } catch (NullPointerException success) {} } @@ -96,12 +121,10 @@ public class PriorityQueueTest extends J * Queue contains all elements of collection used to initialize */ public void testConstructor6() { - Integer[] ints = new Integer[SIZE]; - for (int i = 0; i < SIZE; ++i) - ints[i] = new Integer(i); - PriorityQueue q = new PriorityQueue(Arrays.asList(ints)); + Item[] items = defaultItems; + PriorityQueue q = new PriorityQueue(Arrays.asList(items)); for (int i = 0; i < SIZE; ++i) - assertEquals(ints[i], q.poll()); + mustEqual(items[i], q.poll()); } /** @@ -109,25 +132,24 @@ public class PriorityQueueTest extends J */ public void testConstructor7() { MyReverseComparator cmp = new MyReverseComparator(); - PriorityQueue q = new PriorityQueue(SIZE, cmp); + @SuppressWarnings("unchecked") + PriorityQueue q = new PriorityQueue(SIZE, cmp); assertEquals(cmp, q.comparator()); - Integer[] ints = new Integer[SIZE]; - for (int i = 0; i < SIZE; ++i) - ints[i] = new Integer(i); - q.addAll(Arrays.asList(ints)); - for (int i = SIZE-1; i >= 0; --i) - assertEquals(ints[i], q.poll()); + Item[] items = seqItems(SIZE); + q.addAll(Arrays.asList(items)); + for (int i = SIZE - 1; i >= 0; --i) + mustEqual(items[i], q.poll()); } /** * isEmpty is true before add, false after */ public void testEmpty() { - PriorityQueue q = new PriorityQueue(2); + PriorityQueue q = new PriorityQueue(2); assertTrue(q.isEmpty()); - q.add(new Integer(1)); + q.add(one); assertFalse(q.isEmpty()); - q.add(new Integer(2)); + q.add(two); q.remove(); q.remove(); assertTrue(q.isEmpty()); @@ -137,14 +159,14 @@ public class PriorityQueueTest extends J * size changes when elements added and removed */ public void testSize() { - PriorityQueue q = populatedQueue(SIZE); + PriorityQueue q = populatedQueue(SIZE); for (int i = 0; i < SIZE; ++i) { - assertEquals(SIZE-i, q.size()); + mustEqual(SIZE - i, q.size()); q.remove(); } for (int i = 0; i < SIZE; ++i) { - assertEquals(i, q.size()); - q.add(new Integer(i)); + mustEqual(i, q.size()); + mustAdd(q, i); } } @@ -152,8 +174,8 @@ public class PriorityQueueTest extends J * offer(null) throws NPE */ public void testOfferNull() { + PriorityQueue q = new PriorityQueue(1); try { - PriorityQueue q = new PriorityQueue(1); q.offer(null); shouldThrow(); } catch (NullPointerException success) {} @@ -163,8 +185,8 @@ public class PriorityQueueTest extends J * add(null) throws NPE */ public void testAddNull() { + PriorityQueue q = new PriorityQueue(1); try { - PriorityQueue q = new PriorityQueue(1); q.add(null); shouldThrow(); } catch (NullPointerException success) {} @@ -174,7 +196,7 @@ public class PriorityQueueTest extends J * Offer of comparable element succeeds */ public void testOffer() { - PriorityQueue q = new PriorityQueue(1); + PriorityQueue q = new PriorityQueue(1); assertTrue(q.offer(zero)); assertTrue(q.offer(one)); } @@ -183,23 +205,25 @@ public class PriorityQueueTest extends J * Offer of non-Comparable throws CCE */ public void testOfferNonComparable() { + PriorityQueue q = new PriorityQueue(1); try { - PriorityQueue q = new PriorityQueue(1); - q.offer(new Object()); - q.offer(new Object()); q.offer(new Object()); shouldThrow(); - } catch (ClassCastException success) {} + } catch (ClassCastException success) { + assertTrue(q.isEmpty()); + mustEqual(0, q.size()); + assertNull(q.poll()); + } } /** * add of comparable succeeds */ public void testAdd() { - PriorityQueue q = new PriorityQueue(SIZE); + PriorityQueue q = new PriorityQueue(SIZE); for (int i = 0; i < SIZE; ++i) { - assertEquals(i, q.size()); - assertTrue(q.add(new Integer(i))); + mustEqual(i, q.size()); + mustAdd(q, i); } } @@ -207,34 +231,34 @@ public class PriorityQueueTest extends J * addAll(null) throws NPE */ public void testAddAll1() { + PriorityQueue q = new PriorityQueue(1); try { - PriorityQueue q = new PriorityQueue(1); q.addAll(null); shouldThrow(); } catch (NullPointerException success) {} } + /** * addAll of a collection with null elements throws NPE */ public void testAddAll2() { + PriorityQueue q = new PriorityQueue(SIZE); try { - PriorityQueue q = new PriorityQueue(SIZE); - Integer[] ints = new Integer[SIZE]; - q.addAll(Arrays.asList(ints)); + q.addAll(Arrays.asList(new Item[SIZE])); shouldThrow(); } catch (NullPointerException success) {} } + /** * addAll of a collection with any null elements throws NPE after * possibly adding some elements */ public void testAddAll3() { + PriorityQueue q = new PriorityQueue(SIZE); + Item[] items = new Item[2]; + items[0] = zero; try { - PriorityQueue q = new PriorityQueue(SIZE); - Integer[] ints = new Integer[SIZE]; - for (int i = 0; i < SIZE-1; ++i) - ints[i] = new Integer(i); - q.addAll(Arrays.asList(ints)); + q.addAll(Arrays.asList(items)); shouldThrow(); } catch (NullPointerException success) {} } @@ -243,24 +267,24 @@ public class PriorityQueueTest extends J * Queue contains all elements of successful addAll */ public void testAddAll5() { - Integer[] empty = new Integer[0]; - Integer[] ints = new Integer[SIZE]; + Item[] empty = new Item[0]; + Item[] items = new Item[SIZE]; for (int i = 0; i < SIZE; ++i) - ints[i] = new Integer(SIZE-1-i); - PriorityQueue q = new PriorityQueue(SIZE); + items[i] = itemFor(SIZE - 1 - i); + PriorityQueue q = new PriorityQueue(SIZE); assertFalse(q.addAll(Arrays.asList(empty))); - assertTrue(q.addAll(Arrays.asList(ints))); + assertTrue(q.addAll(Arrays.asList(items))); for (int i = 0; i < SIZE; ++i) - assertEquals(new Integer(i), q.poll()); + mustEqual(i, q.poll()); } /** * poll succeeds unless empty */ public void testPoll() { - PriorityQueue q = populatedQueue(SIZE); + PriorityQueue q = populatedQueue(SIZE); for (int i = 0; i < SIZE; ++i) { - assertEquals(i, q.poll()); + mustEqual(i, q.poll()); } assertNull(q.poll()); } @@ -269,10 +293,10 @@ public class PriorityQueueTest extends J * peek returns next element, or null if empty */ public void testPeek() { - PriorityQueue q = populatedQueue(SIZE); + PriorityQueue q = populatedQueue(SIZE); for (int i = 0; i < SIZE; ++i) { - assertEquals(i, q.peek()); - assertEquals(i, q.poll()); + mustEqual(i, q.peek()); + mustEqual(i, q.poll()); assertTrue(q.peek() == null || !q.peek().equals(i)); } @@ -283,10 +307,10 @@ public class PriorityQueueTest extends J * element returns next element, or throws NSEE if empty */ public void testElement() { - PriorityQueue q = populatedQueue(SIZE); + PriorityQueue q = populatedQueue(SIZE); for (int i = 0; i < SIZE; ++i) { - assertEquals(i, q.element()); - assertEquals(i, q.poll()); + mustEqual(i, q.element()); + mustEqual(i, q.poll()); } try { q.element(); @@ -298,9 +322,9 @@ public class PriorityQueueTest extends J * remove removes next element, or throws NSEE if empty */ public void testRemove() { - PriorityQueue q = populatedQueue(SIZE); + PriorityQueue q = populatedQueue(SIZE); for (int i = 0; i < SIZE; ++i) { - assertEquals(i, q.remove()); + mustEqual(i, q.remove()); } try { q.remove(); @@ -312,13 +336,19 @@ public class PriorityQueueTest extends J * remove(x) removes x and returns true if present */ public void testRemoveElement() { - PriorityQueue q = populatedQueue(SIZE); - for (int i = 1; i < SIZE; i+=2) { - assertTrue(q.remove(new Integer(i))); - } - for (int i = 0; i < SIZE; i+=2) { - assertTrue(q.remove(new Integer(i))); - assertFalse(q.remove(new Integer(i+1))); + PriorityQueue q = populatedQueue(SIZE); + for (int i = 1; i < SIZE; i += 2) { + mustContain(q, i); + mustRemove(q, i); + mustNotContain(q, i); + mustContain(q, i - 1); + } + for (int i = 0; i < SIZE; i += 2) { + mustContain(q, i); + mustRemove(q, i); + mustNotContain(q, i); + mustNotRemove(q, i + 1); + mustNotContain(q, i + 1); } assertTrue(q.isEmpty()); } @@ -327,11 +357,11 @@ public class PriorityQueueTest extends J * contains(x) reports true when elements added but not yet removed */ public void testContains() { - PriorityQueue q = populatedQueue(SIZE); + PriorityQueue q = populatedQueue(SIZE); for (int i = 0; i < SIZE; ++i) { - assertTrue(q.contains(new Integer(i))); + mustContain(q, i); q.poll(); - assertFalse(q.contains(new Integer(i))); + mustNotContain(q, i); } } @@ -339,11 +369,11 @@ public class PriorityQueueTest extends J * clear removes all elements */ public void testClear() { - PriorityQueue q = populatedQueue(SIZE); + PriorityQueue q = populatedQueue(SIZE); q.clear(); assertTrue(q.isEmpty()); - assertEquals(0, q.size()); - q.add(new Integer(1)); + mustEqual(0, q.size()); + q.add(one); assertFalse(q.isEmpty()); q.clear(); assertTrue(q.isEmpty()); @@ -353,12 +383,12 @@ public class PriorityQueueTest extends J * containsAll(c) is true when c contains a subset of elements */ public void testContainsAll() { - PriorityQueue q = populatedQueue(SIZE); - PriorityQueue p = new PriorityQueue(SIZE); + PriorityQueue q = populatedQueue(SIZE); + PriorityQueue p = new PriorityQueue(SIZE); for (int i = 0; i < SIZE; ++i) { assertTrue(q.containsAll(p)); assertFalse(p.containsAll(q)); - p.add(new Integer(i)); + mustAdd(p, i); } assertTrue(p.containsAll(q)); } @@ -367,8 +397,8 @@ public class PriorityQueueTest extends J * retainAll(c) retains only those elements of c and reports true if changed */ public void testRetainAll() { - PriorityQueue q = populatedQueue(SIZE); - PriorityQueue p = populatedQueue(SIZE); + PriorityQueue q = populatedQueue(SIZE); + PriorityQueue p = populatedQueue(SIZE); for (int i = 0; i < SIZE; ++i) { boolean changed = q.retainAll(p); if (i == 0) @@ -377,7 +407,7 @@ public class PriorityQueueTest extends J assertTrue(changed); assertTrue(q.containsAll(p)); - assertEquals(SIZE-i, q.size()); + mustEqual(SIZE - i, q.size()); p.remove(); } } @@ -387,13 +417,12 @@ public class PriorityQueueTest extends J */ public void testRemoveAll() { for (int i = 1; i < SIZE; ++i) { - PriorityQueue q = populatedQueue(SIZE); - PriorityQueue p = populatedQueue(i); + PriorityQueue q = populatedQueue(SIZE); + PriorityQueue p = populatedQueue(i); assertTrue(q.removeAll(p)); - assertEquals(SIZE-i, q.size()); + mustEqual(SIZE - i, q.size()); for (int j = 0; j < i; ++j) { - Integer I = (Integer)(p.remove()); - assertFalse(q.contains(I)); + mustNotContain(q, p.remove()); } } } @@ -402,85 +431,92 @@ public class PriorityQueueTest extends J * toArray contains all elements */ public void testToArray() { - PriorityQueue q = populatedQueue(SIZE); - Object[] o = q.toArray(); - Arrays.sort(o); - for (int i = 0; i < o.length; i++) - assertEquals(o[i], q.poll()); + PriorityQueue q = populatedQueue(SIZE); + Object[] a = q.toArray(); + assertSame(Object[].class, a.getClass()); + Arrays.sort(a); + for (Object o : a) + assertSame(o, q.poll()); + assertTrue(q.isEmpty()); } /** * toArray(a) contains all elements */ public void testToArray2() { - PriorityQueue q = populatedQueue(SIZE); - Integer[] ints = new Integer[SIZE]; - ints = (Integer[])q.toArray(ints); - Arrays.sort(ints); - for (int i = 0; i < ints.length; i++) - assertEquals(ints[i], q.poll()); + PriorityQueue q = populatedQueue(SIZE); + Item[] items = new Item[SIZE]; + Item[] array = q.toArray(items); + assertSame(items, array); + Arrays.sort(items); + for (Item o : items) + assertSame(o, q.poll()); + assertTrue(q.isEmpty()); } /** * iterator iterates through all elements */ public void testIterator() { - PriorityQueue q = populatedQueue(SIZE); - int i = 0; - Iterator it = q.iterator(); - while (it.hasNext()) { - assertTrue(q.contains(it.next())); - ++i; - } - assertEquals(i, SIZE); + PriorityQueue q = populatedQueue(SIZE); + Iterator it = q.iterator(); + int i; + for (i = 0; it.hasNext(); i++) + mustContain(q, it.next()); + mustEqual(i, SIZE); + assertIteratorExhausted(it); + } + + /** + * iterator of empty collection has no elements + */ + public void testEmptyIterator() { + assertIteratorExhausted(new PriorityQueue().iterator()); } /** * iterator.remove removes current element */ public void testIteratorRemove() { - final PriorityQueue q = new PriorityQueue(3); - q.add(new Integer(2)); - q.add(new Integer(1)); - q.add(new Integer(3)); + final PriorityQueue q = new PriorityQueue(3); + q.add(two); + q.add(one); + q.add(three); - Iterator it = q.iterator(); + Iterator it = q.iterator(); it.next(); it.remove(); it = q.iterator(); - assertEquals(it.next(), new Integer(2)); - assertEquals(it.next(), new Integer(3)); + mustEqual(it.next(), two); + mustEqual(it.next(), three); assertFalse(it.hasNext()); } - /** * toString contains toStrings of elements */ public void testToString() { - PriorityQueue q = populatedQueue(SIZE); + PriorityQueue q = populatedQueue(SIZE); String s = q.toString(); for (int i = 0; i < SIZE; ++i) { - assertTrue(s.indexOf(String.valueOf(i)) >= 0); + assertTrue(s.contains(String.valueOf(i))); } } /** - * A deserialized serialized queue has same elements + * A deserialized/reserialized queue has same elements */ public void testSerialization() throws Exception { - PriorityQueue q = populatedQueue(SIZE); - ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); - ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); - out.writeObject(q); - out.close(); - - ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); - ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); - PriorityQueue r = (PriorityQueue)in.readObject(); - assertEquals(q.size(), r.size()); - while (!q.isEmpty()) - assertEquals(q.remove(), r.remove()); + Queue x = populatedQueue(SIZE); + Queue y = serialClone(x); + + assertNotSame(x, y); + mustEqual(x.size(), y.size()); + while (!x.isEmpty()) { + assertFalse(y.isEmpty()); + mustEqual(x.remove(), y.remove()); + } + assertTrue(y.isEmpty()); } }