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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/licenses/publicdomain |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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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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import junit.framework.*; |
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public class PriorityQueueTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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junit.textui.TestRunner.run (suite()); |
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junit.textui.TestRunner.run (suite()); |
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} |
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public static Test suite() { |
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return new TestSuite(PriorityQueueTest.class); |
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} |
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static class MyReverseComparator implements Comparator { |
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static class MyReverseComparator implements Comparator { |
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public int compare(Object x, Object y) { |
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int i = ((Integer)x).intValue(); |
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int j = ((Integer)y).intValue(); |
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private PriorityQueue populatedQueue(int n) { |
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PriorityQueue q = new PriorityQueue(n); |
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assertTrue(q.isEmpty()); |
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for(int i = n-1; i >= 0; i-=2) |
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for (int i = n-1; i >= 0; i-=2) |
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assertTrue(q.offer(new Integer(i))); |
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for(int i = (n & 1); i < n; i+=2) |
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for (int i = (n & 1); i < n; i+=2) |
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assertTrue(q.offer(new Integer(i))); |
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assertFalse(q.isEmpty()); |
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assertEquals(n, q.size()); |
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return q; |
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} |
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/** |
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* A new queue has unbounded capacity |
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*/ |
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PriorityQueue q = new PriorityQueue(1); |
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q.offer(null); |
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shouldThrow(); |
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} catch (NullPointerException success) { } |
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} catch (NullPointerException success) { } |
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} |
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/** |
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PriorityQueue q = new PriorityQueue(1); |
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q.add(null); |
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shouldThrow(); |
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} catch (NullPointerException success) { } |
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} catch (NullPointerException success) { } |
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} |
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/** |
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q.offer(new Object()); |
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shouldThrow(); |
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} |
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catch(ClassCastException success) {} |
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catch (ClassCastException success) {} |
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} |
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/** |
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try { |
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q.remove(); |
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shouldThrow(); |
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} catch (NoSuchElementException success){ |
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} |
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} catch (NoSuchElementException success) { |
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} |
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} |
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/** |
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} |
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assertTrue(q.isEmpty()); |
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} |
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/** |
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* contains(x) reports true when elements added but not yet removed |
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*/ |
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PriorityQueue q = populatedQueue(SIZE); |
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Object[] o = q.toArray(); |
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Arrays.sort(o); |
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for(int i = 0; i < o.length; i++) |
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for (int i = 0; i < o.length; i++) |
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assertEquals(o[i], q.poll()); |
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} |
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Integer[] ints = new Integer[SIZE]; |
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ints = (Integer[])q.toArray(ints); |
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Arrays.sort(ints); |
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for(int i = 0; i < ints.length; i++) |
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for (int i = 0; i < ints.length; i++) |
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assertEquals(ints[i], q.poll()); |
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} |
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/** |
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* iterator iterates through all elements |
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*/ |
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PriorityQueue q = populatedQueue(SIZE); |
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int i = 0; |
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Iterator it = q.iterator(); |
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while(it.hasNext()) { |
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while (it.hasNext()) { |
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assertTrue(q.contains(it.next())); |
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++i; |
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} |
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for (int i = 0; i < SIZE; ++i) { |
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assertTrue(s.indexOf(String.valueOf(i)) >= 0); |
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} |
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} |
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} |
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/** |
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* A deserialized serialized queue has same elements |
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* A deserialized serialized queue has same elements |
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*/ |
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public void testSerialization() { |
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PriorityQueue q = populatedQueue(SIZE); |
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ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
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PriorityQueue r = (PriorityQueue)in.readObject(); |
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assertEquals(q.size(), r.size()); |
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while (!q.isEmpty()) |
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while (!q.isEmpty()) |
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assertEquals(q.remove(), r.remove()); |
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} catch(Exception e){ |
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} catch (Exception e) { |
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unexpectedException(); |
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} |
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} |