18f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle/* 28f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * Written by Doug Lea with assistance from members of JCP JSR-166 38f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * Expert Group and released to the public domain, as explained at 48f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * http://creativecommons.org/publicdomain/zero/1.0/ 58f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * Other contributors include Andrew Wright, Jeffrey Hayes, 68f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * Pat Fisher, Mike Judd. 78f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 88f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 98f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravlepackage jsr166; 108f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 118f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravleimport java.util.Arrays; 128f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravleimport java.util.Collection; 138f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravleimport java.util.Comparator; 148f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravleimport java.util.Iterator; 158f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravleimport java.util.NoSuchElementException; 168f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravleimport java.util.PriorityQueue; 178f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravleimport java.util.Queue; 188f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 198e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamathimport junit.framework.Test; 208e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamathimport junit.framework.TestSuite; 218e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath 228f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravlepublic class PriorityQueueTest extends JSR166TestCase { 238e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath // android-note: Removed because the CTS runner does a bad job of 248e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath // retrying tests that have suite() declarations. 258e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath // 268e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath // public static void main(String[] args) { 278e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath // main(suite(), args); 288e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath // } 298e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath // public static Test suite() { 30b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak // return new TestSuite(PriorityQueueTest.class); 318e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath // } 328f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 338f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle static class MyReverseComparator implements Comparator { 348f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public int compare(Object x, Object y) { 358f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle return ((Comparable)y).compareTo(x); 368f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 378f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 388f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 398f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 408f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * Returns a new queue of given size containing consecutive 418f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * Integers 0 ... n. 428f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 438f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle private PriorityQueue<Integer> populatedQueue(int n) { 448f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue<Integer> q = new PriorityQueue<Integer>(n); 458f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.isEmpty()); 46b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak for (int i = n - 1; i >= 0; i -= 2) 478f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.offer(new Integer(i))); 488e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath for (int i = (n & 1); i < n; i += 2) 498f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.offer(new Integer(i))); 508f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertFalse(q.isEmpty()); 518f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertEquals(n, q.size()); 528f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle return q; 538f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 548f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 558f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 568f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * A new queue has unbounded capacity 578f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 588f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testConstructor1() { 598f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertEquals(0, new PriorityQueue(SIZE).size()); 608f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 618f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 628f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 638f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * Constructor throws IAE if capacity argument nonpositive 648f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 658f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testConstructor2() { 668f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle try { 678e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath new PriorityQueue(0); 688f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle shouldThrow(); 698f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } catch (IllegalArgumentException success) {} 708f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 718f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 728f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 738f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * Initializing from null Collection throws NPE 748f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 758f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testConstructor3() { 768f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle try { 778e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath new PriorityQueue((Collection)null); 788f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle shouldThrow(); 798f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } catch (NullPointerException success) {} 808f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 818f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 828f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 838f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * Initializing from Collection of null elements throws NPE 848f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 858f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testConstructor4() { 868f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle try { 87b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak new PriorityQueue(Arrays.asList(new Integer[SIZE])); 888f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle shouldThrow(); 898f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } catch (NullPointerException success) {} 908f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 918f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 928f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 938f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * Initializing from Collection with some null elements throws NPE 948f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 958f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testConstructor5() { 96b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak Integer[] ints = new Integer[SIZE]; 97b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak for (int i = 0; i < SIZE - 1; ++i) 98b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak ints[i] = new Integer(i); 998f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle try { 1008e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath new PriorityQueue(Arrays.asList(ints)); 1018f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle shouldThrow(); 1028f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } catch (NullPointerException success) {} 1038f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 1048f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 1058f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 1068f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * Queue contains all elements of collection used to initialize 1078f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 1088f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testConstructor6() { 1098f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle Integer[] ints = new Integer[SIZE]; 1108f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle for (int i = 0; i < SIZE; ++i) 1118f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle ints[i] = new Integer(i); 1128f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue q = new PriorityQueue(Arrays.asList(ints)); 1138f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle for (int i = 0; i < SIZE; ++i) 1148f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertEquals(ints[i], q.poll()); 1158f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 1168f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 1178f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 1188f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * The comparator used in constructor is used 1198f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 1208f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testConstructor7() { 1218f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle MyReverseComparator cmp = new MyReverseComparator(); 1228f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue q = new PriorityQueue(SIZE, cmp); 1238f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertEquals(cmp, q.comparator()); 1248f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle Integer[] ints = new Integer[SIZE]; 1258f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle for (int i = 0; i < SIZE; ++i) 1268f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle ints[i] = new Integer(i); 1278f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.addAll(Arrays.asList(ints)); 128b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak for (int i = SIZE - 1; i >= 0; --i) 1298f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertEquals(ints[i], q.poll()); 1308f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 1318f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 1328f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 1338f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * isEmpty is true before add, false after 1348f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 1358f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testEmpty() { 1368f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue q = new PriorityQueue(2); 1378f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.isEmpty()); 1388f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.add(new Integer(1)); 1398f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertFalse(q.isEmpty()); 1408f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.add(new Integer(2)); 1418f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.remove(); 1428f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.remove(); 1438f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.isEmpty()); 1448f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 1458f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 1468f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 1478f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * size changes when elements added and removed 1488f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 1498f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testSize() { 1508f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue q = populatedQueue(SIZE); 1518f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle for (int i = 0; i < SIZE; ++i) { 152b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak assertEquals(SIZE - i, q.size()); 1538f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.remove(); 1548f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 1558f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle for (int i = 0; i < SIZE; ++i) { 1568f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertEquals(i, q.size()); 1578f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.add(new Integer(i)); 1588f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 1598f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 1608f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 1618f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 1628f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * offer(null) throws NPE 1638f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 1648f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testOfferNull() { 165b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak PriorityQueue q = new PriorityQueue(1); 1668f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle try { 1678f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.offer(null); 1688f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle shouldThrow(); 1698f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } catch (NullPointerException success) {} 1708f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 1718f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 1728f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 1738f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * add(null) throws NPE 1748f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 1758f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testAddNull() { 176b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak PriorityQueue q = new PriorityQueue(1); 1778f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle try { 1788f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.add(null); 1798f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle shouldThrow(); 1808f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } catch (NullPointerException success) {} 1818f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 1828f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 1838f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 1848f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * Offer of comparable element succeeds 1858f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 1868f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testOffer() { 1878f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue q = new PriorityQueue(1); 1888f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.offer(zero)); 1898f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.offer(one)); 1908f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 1918f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 1928f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 1938f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * Offer of non-Comparable throws CCE 1948f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 1958f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testOfferNonComparable() { 1968e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath PriorityQueue q = new PriorityQueue(1); 1978f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle try { 1988f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.offer(new Object()); 1998f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.offer(new Object()); 2008f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle shouldThrow(); 2018f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } catch (ClassCastException success) {} 2028f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 2038f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 2048f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 2058f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * add of comparable succeeds 2068f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 2078f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testAdd() { 2088f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue q = new PriorityQueue(SIZE); 2098f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle for (int i = 0; i < SIZE; ++i) { 2108f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertEquals(i, q.size()); 2118f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.add(new Integer(i))); 2128f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 2138f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 2148f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 2158f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 2168f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * addAll(null) throws NPE 2178f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 2188f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testAddAll1() { 219b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak PriorityQueue q = new PriorityQueue(1); 2208f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle try { 2218f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.addAll(null); 2228f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle shouldThrow(); 2238f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } catch (NullPointerException success) {} 2248f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 2258f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 2268f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 2278f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * addAll of a collection with null elements throws NPE 2288f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 2298f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testAddAll2() { 230b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak PriorityQueue q = new PriorityQueue(SIZE); 2318f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle try { 232b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak q.addAll(Arrays.asList(new Integer[SIZE])); 2338f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle shouldThrow(); 2348f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } catch (NullPointerException success) {} 2358f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 2368f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 2378f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 2388f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * addAll of a collection with any null elements throws NPE after 2398f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * possibly adding some elements 2408f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 2418f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testAddAll3() { 242b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak PriorityQueue q = new PriorityQueue(SIZE); 243b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak Integer[] ints = new Integer[SIZE]; 244b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak for (int i = 0; i < SIZE - 1; ++i) 245b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak ints[i] = new Integer(i); 2468f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle try { 2478f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.addAll(Arrays.asList(ints)); 2488f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle shouldThrow(); 2498f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } catch (NullPointerException success) {} 2508f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 2518f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 2528f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 2538f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * Queue contains all elements of successful addAll 2548f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 2558f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testAddAll5() { 2568f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle Integer[] empty = new Integer[0]; 2578f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle Integer[] ints = new Integer[SIZE]; 2588f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle for (int i = 0; i < SIZE; ++i) 259b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak ints[i] = new Integer(SIZE - 1 - i); 2608f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue q = new PriorityQueue(SIZE); 2618f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertFalse(q.addAll(Arrays.asList(empty))); 2628f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.addAll(Arrays.asList(ints))); 2638f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle for (int i = 0; i < SIZE; ++i) 2648f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertEquals(new Integer(i), q.poll()); 2658f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 2668f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 2678f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 2688f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * poll succeeds unless empty 2698f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 2708f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testPoll() { 2718f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue q = populatedQueue(SIZE); 2728f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle for (int i = 0; i < SIZE; ++i) { 2738f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertEquals(i, q.poll()); 2748f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 2758f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertNull(q.poll()); 2768f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 2778f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 2788f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 2798f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * peek returns next element, or null if empty 2808f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 2818f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testPeek() { 2828f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue q = populatedQueue(SIZE); 2838f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle for (int i = 0; i < SIZE; ++i) { 2848f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertEquals(i, q.peek()); 2858f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertEquals(i, q.poll()); 2868f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.peek() == null || 2878f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle !q.peek().equals(i)); 2888f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 2898f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertNull(q.peek()); 2908f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 2918f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 2928f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 2938f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * element returns next element, or throws NSEE if empty 2948f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 2958f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testElement() { 2968f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue q = populatedQueue(SIZE); 2978f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle for (int i = 0; i < SIZE; ++i) { 2988f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertEquals(i, q.element()); 2998f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertEquals(i, q.poll()); 3008f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 3018f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle try { 3028f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.element(); 3038f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle shouldThrow(); 3048f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } catch (NoSuchElementException success) {} 3058f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 3068f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 3078f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 3088f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * remove removes next element, or throws NSEE if empty 3098f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 3108f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testRemove() { 3118f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue q = populatedQueue(SIZE); 3128f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle for (int i = 0; i < SIZE; ++i) { 3138f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertEquals(i, q.remove()); 3148f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 3158f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle try { 3168f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.remove(); 3178f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle shouldThrow(); 3188f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } catch (NoSuchElementException success) {} 3198f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 3208f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 3218f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 3228f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * remove(x) removes x and returns true if present 3238f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 3248f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testRemoveElement() { 3258f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue q = populatedQueue(SIZE); 3268e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath for (int i = 1; i < SIZE; i += 2) { 3278f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.contains(i)); 3288f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.remove(i)); 3298f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertFalse(q.contains(i)); 330b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak assertTrue(q.contains(i - 1)); 3318f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 3328e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath for (int i = 0; i < SIZE; i += 2) { 3338f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.contains(i)); 3348f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.remove(i)); 3358f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertFalse(q.contains(i)); 336b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak assertFalse(q.remove(i + 1)); 337b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak assertFalse(q.contains(i + 1)); 3388f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 3398f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.isEmpty()); 3408f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 3418f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 3428f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 3438f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * contains(x) reports true when elements added but not yet removed 3448f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 3458f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testContains() { 3468f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue q = populatedQueue(SIZE); 3478f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle for (int i = 0; i < SIZE; ++i) { 3488f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.contains(new Integer(i))); 3498f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.poll(); 3508f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertFalse(q.contains(new Integer(i))); 3518f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 3528f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 3538f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 3548f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 3558f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * clear removes all elements 3568f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 3578f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testClear() { 3588f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue q = populatedQueue(SIZE); 3598f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.clear(); 3608f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.isEmpty()); 3618f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertEquals(0, q.size()); 3628f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.add(new Integer(1)); 3638f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertFalse(q.isEmpty()); 3648f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.clear(); 3658f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.isEmpty()); 3668f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 3678f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 3688f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 3698f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * containsAll(c) is true when c contains a subset of elements 3708f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 3718f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testContainsAll() { 3728f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue q = populatedQueue(SIZE); 3738f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue p = new PriorityQueue(SIZE); 3748f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle for (int i = 0; i < SIZE; ++i) { 3758f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.containsAll(p)); 3768f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertFalse(p.containsAll(q)); 3778f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle p.add(new Integer(i)); 3788f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 3798f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(p.containsAll(q)); 3808f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 3818f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 3828f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 3838f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * retainAll(c) retains only those elements of c and reports true if changed 3848f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 3858f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testRetainAll() { 3868f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue q = populatedQueue(SIZE); 3878f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue p = populatedQueue(SIZE); 3888f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle for (int i = 0; i < SIZE; ++i) { 3898f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle boolean changed = q.retainAll(p); 3908f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle if (i == 0) 3918f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertFalse(changed); 3928f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle else 3938f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(changed); 3948f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 3958f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.containsAll(p)); 396b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak assertEquals(SIZE - i, q.size()); 3978f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle p.remove(); 3988f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 3998f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 4008f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 4018f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 4028f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * removeAll(c) removes only those elements of c and reports true if changed 4038f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 4048f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testRemoveAll() { 4058f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle for (int i = 1; i < SIZE; ++i) { 4068f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue q = populatedQueue(SIZE); 4078f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue p = populatedQueue(i); 4088f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.removeAll(p)); 409b8b75116273ecfdb8ffdd1869b1c0dd04570a95ePrzemyslaw Szczepaniak assertEquals(SIZE - i, q.size()); 4108f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle for (int j = 0; j < i; ++j) { 4118e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath Integer x = (Integer)(p.remove()); 4128e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath assertFalse(q.contains(x)); 4138f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 4148f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 4158f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 4168f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 4178f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 4188f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * toArray contains all elements 4198f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 4208f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testToArray() { 4218f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue q = populatedQueue(SIZE); 4228f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle Object[] o = q.toArray(); 4238f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle Arrays.sort(o); 4248f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle for (int i = 0; i < o.length; i++) 4258f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertSame(o[i], q.poll()); 4268f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 4278f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 4288f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 4298f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * toArray(a) contains all elements 4308f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 4318f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testToArray2() { 4328f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue<Integer> q = populatedQueue(SIZE); 4338f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle Integer[] ints = new Integer[SIZE]; 4348f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle Integer[] array = q.toArray(ints); 4358f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertSame(ints, array); 4368f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle Arrays.sort(ints); 4378f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle for (int i = 0; i < ints.length; i++) 4388f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertSame(ints[i], q.poll()); 4398f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 4408f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 4418f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 4428f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * iterator iterates through all elements 4438f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 4448f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testIterator() { 4458f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue q = populatedQueue(SIZE); 4468f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle Iterator it = q.iterator(); 4478e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath int i; 4488e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath for (i = 0; it.hasNext(); i++) 4498f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(q.contains(it.next())); 4508f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertEquals(i, SIZE); 4518e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath assertIteratorExhausted(it); 4528e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath } 4538e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath 4548e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath /** 4558e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath * iterator of empty collection has no elements 4568e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath */ 4578e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath public void testEmptyIterator() { 4588e9a0e92906742b17eb08d7fb83cca91965f9b8eNarayan Kamath assertIteratorExhausted(new PriorityQueue().iterator()); 4598f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 4608f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 4618f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 4628f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * iterator.remove removes current element 4638f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 4648f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testIteratorRemove() { 4658f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle final PriorityQueue q = new PriorityQueue(3); 4668f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.add(new Integer(2)); 4678f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.add(new Integer(1)); 4688f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle q.add(new Integer(3)); 4698f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 4708f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle Iterator it = q.iterator(); 4718f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle it.next(); 4728f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle it.remove(); 4738f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 4748f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle it = q.iterator(); 4758f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertEquals(it.next(), new Integer(2)); 4768f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertEquals(it.next(), new Integer(3)); 4778f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertFalse(it.hasNext()); 4788f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 4798f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 4808f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 4818f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * toString contains toStrings of elements 4828f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 4838f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testToString() { 4848f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle PriorityQueue q = populatedQueue(SIZE); 4858f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle String s = q.toString(); 4868f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle for (int i = 0; i < SIZE; ++i) { 4878f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(s.contains(String.valueOf(i))); 4888f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 4898f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 4908f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 4918f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle /** 4928f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle * A deserialized serialized queue has same elements 4938f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle */ 4948f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle public void testSerialization() throws Exception { 4958f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle Queue x = populatedQueue(SIZE); 4968f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle Queue y = serialClone(x); 4978f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle 4988f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertNotSame(x, y); 4998f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertEquals(x.size(), y.size()); 5008f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle while (!x.isEmpty()) { 5018f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertFalse(y.isEmpty()); 5028f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertEquals(x.remove(), y.remove()); 5038f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 5048f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle assertTrue(y.isEmpty()); 5058f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle } 5068f0d92bba199d906c70a5e40d7f3516c1a424117Calin Juravle} 507