test/com/google/common/collect/Jsr166HashMapTest.java - platform/external/guava - Git at Google

 /*
  * 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
  * Other contributors include Andrew Wright, Jeffrey Hayes,
  * Pat Fisher, Mike Judd.
  */

 package com.google.common.collect;

 import junit.framework.TestCase;

 import java.io.BufferedInputStream;
 import java.io.BufferedOutputStream;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.ObjectInputStream;
 import java.io.ObjectOutputStream;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Iterator;
 import java.util.Map;
 import java.util.Set;

 /**
  * ConcurrentHashMap tests copied from ConcurrentHashMapTest. Useful as a
  * test case for CustomConcurrentHashMap.
  */
 @SuppressWarnings("unchecked")
 public class Jsr166HashMapTest extends TestCase {

     /*
      * The following two methods and constants were copied from JSR166TestCase.
      */

     /**
      * fail with message "should throw exception"
      */
     public void shouldThrow() {
         fail("Should throw exception");
     }

     /**
      * fail with message "Unexpected exception"
      */
     public void unexpectedException() {
         fail("Unexpected exception");
     }

     static final Integer zero = new Integer(0);
     static final Integer one = new Integer(1);
     static final Integer two = new Integer(2);
     static final Integer three = new Integer(3);
     static final Integer four = new Integer(4);
     static final Integer five = new Integer(5);
     static final Integer six = new Integer(6);
     static final Integer seven = new Integer(7);
     static final Integer eight = new Integer(8);
     static final Integer nine = new Integer(9);
     static final Integer m1 = new Integer(-1);
     static final Integer m2 = new Integer(-2);
     static final Integer m3 = new Integer(-3);
     static final Integer m4 = new Integer(-4);
     static final Integer m5 = new Integer(-5);
     static final Integer m6 = new Integer(-6);
     static final Integer m10 = new Integer(-10);

     /**
      * Create a map from Integers 1-5 to Strings "A"-"E".
      */
     private static Jsr166HashMap map5() {
         Jsr166HashMap map = new Jsr166HashMap(5);
         assertTrue(map.isEmpty());
         map.put(one, "A");
         map.put(two, "B");
         map.put(three, "C");
         map.put(four, "D");
         map.put(five, "E");
         assertFalse(map.isEmpty());
         assertEquals(5, map.size());
         return map;
     }

     /**
      * clear removes all pairs
      */
     public void testClear() {
         Jsr166HashMap map = map5();
         map.clear();
         assertEquals(map.size(), 0);
     }

     /**
      * Maps with same contents are equal
      */
     public void testEquals() {
         Jsr166HashMap map1 = map5();
         Jsr166HashMap map2 = map5();
         assertEquals(map1, map2);
         assertEquals(map2, map1);
         map1.clear();
         assertFalse(map1.equals(map2));
         assertFalse(map2.equals(map1));
     }

     /**
      * containsKey returns true for contained key
      */
     public void testContainsKey() {
         Jsr166HashMap map = map5();
         assertTrue(map.containsKey(one));
         assertFalse(map.containsKey(zero));
     }

     /**
      * containsValue returns true for held values
      */
     public void testContainsValue() {
         Jsr166HashMap map = map5();
         assertTrue(map.containsValue("A"));
         assertFalse(map.containsValue("Z"));
     }

     /**
      * get returns the correct element at the given key, or null if not present
      */
     public void testGet() {
         Jsr166HashMap map = map5();
         assertEquals("A", (String) map.get(one));
         Jsr166HashMap empty = new Jsr166HashMap();
         assertNull(map.get("anything"));
     }

     /**
      * isEmpty is true of empty map and false for non-empty
      */
     public void testIsEmpty() {
         Jsr166HashMap empty = new Jsr166HashMap();
         Jsr166HashMap map = map5();
         assertTrue(empty.isEmpty());
         assertFalse(map.isEmpty());
     }

     /**
      * keySet returns a Set containing all the keys
      */
     public void testKeySet() {
         Jsr166HashMap map = map5();
         Set s = map.keySet();
         assertEquals(5, s.size());
         assertTrue(s.contains(one));
         assertTrue(s.contains(two));
         assertTrue(s.contains(three));
         assertTrue(s.contains(four));
         assertTrue(s.contains(five));
     }

     /**
      * keySet.toArray returns contains all keys
      */
     public void testKeySetToArray() {
         Jsr166HashMap map = map5();
         Set s = map.keySet();
         Object[] ar = s.toArray();
         assertTrue(s.containsAll(Arrays.asList(ar)));
         assertEquals(5, ar.length);
         ar[0] = m10;
         assertFalse(s.containsAll(Arrays.asList(ar)));
     }

     /**
      * Values.toArray contains all values
      */
     public void testValuesToArray() {
         Jsr166HashMap map = map5();
         Collection v = map.values();
         Object[] ar = v.toArray();
         ArrayList s = new ArrayList(Arrays.asList(ar));
         assertEquals(5, ar.length);
         assertTrue(s.contains("A"));
         assertTrue(s.contains("B"));
         assertTrue(s.contains("C"));
         assertTrue(s.contains("D"));
         assertTrue(s.contains("E"));
     }

     /**
      * entrySet.toArray contains all entries
      */
     public void testEntrySetToArray() {
         Jsr166HashMap map = map5();
         Set s = map.entrySet();
         Object[] ar = s.toArray();
         assertEquals(5, ar.length);
         for (int i = 0; i < 5; ++i) {
             assertTrue(map.containsKey(((Map.Entry) (ar[i])).getKey()));
             assertTrue(map.containsValue(((Map.Entry) (ar[i])).getValue()));
         }
     }

     /**
      * values collection contains all values
      */
     public void testValues() {
         Jsr166HashMap map = map5();
         Collection s = map.values();
         assertEquals(5, s.size());
         assertTrue(s.contains("A"));
         assertTrue(s.contains("B"));
         assertTrue(s.contains("C"));
         assertTrue(s.contains("D"));
         assertTrue(s.contains("E"));
     }

     /**
      * entrySet contains all pairs
      */
     public void testEntrySet() {
         Jsr166HashMap map = map5();
         Set s = map.entrySet();
         assertEquals(5, s.size());
         Iterator it = s.iterator();
         while (it.hasNext()) {
             Map.Entry e = (Map.Entry) it.next();
             assertTrue(
                     (e.getKey().equals(one) && e.getValue().equals("A")) ||
                             (e.getKey().equals(two) && e.getValue().equals("B"))
                             ||
                             (e.getKey().equals(three) && e.getValue()
                                     .equals("C")) ||
                             (e.getKey().equals(four) && e.getValue()
                                     .equals("D")) ||
                             (e.getKey().equals(five) && e.getValue()
                                     .equals("E")));
         }
     }

     /**
      * putAll  adds all key-value pairs from the given map
      */
     public void testPutAll() {
         Jsr166HashMap empty = new Jsr166HashMap();
         Jsr166HashMap map = map5();
         empty.putAll(map);
         assertEquals(5, empty.size());
         assertTrue(empty.containsKey(one));
         assertTrue(empty.containsKey(two));
         assertTrue(empty.containsKey(three));
         assertTrue(empty.containsKey(four));
         assertTrue(empty.containsKey(five));
     }

     /**
      * putIfAbsent works when the given key is not present
      */
     public void testPutIfAbsent() {
         Jsr166HashMap map = map5();
         map.putIfAbsent(six, "Z");
         assertTrue(map.containsKey(six));
     }

     /**
      * putIfAbsent does not add the pair if the key is already present
      */
     public void testPutIfAbsent2() {
         Jsr166HashMap map = map5();
         assertEquals("A", map.putIfAbsent(one, "Z"));
     }

     /**
      * replace fails when the given key is not present
      */
     public void testReplace() {
         Jsr166HashMap map = map5();
         assertNull(map.replace(six, "Z"));
         assertFalse(map.containsKey(six));
     }

     /**
      * replace succeeds if the key is already present
      */
     public void testReplace2() {
         Jsr166HashMap map = map5();
         assertNotNull(map.replace(one, "Z"));
         assertEquals("Z", map.get(one));
     }


     /**
      * replace value fails when the given key not mapped to expected value
      */
     public void testReplaceValue() {
         Jsr166HashMap map = map5();
         assertEquals("A", map.get(one));
         assertFalse(map.replace(one, "Z", "Z"));
         assertEquals("A", map.get(one));
     }

     /**
      * replace value succeeds when the given key mapped to expected value
      */
     public void testReplaceValue2() {
         Jsr166HashMap map = map5();
         assertEquals("A", map.get(one));
         assertTrue(map.replace(one, "A", "Z"));
         assertEquals("Z", map.get(one));
     }


     /**
      * remove removes the correct key-value pair from the map
      */
     public void testRemove() {
         Jsr166HashMap map = map5();
         map.remove(five);
         assertEquals(4, map.size());
         assertFalse(map.containsKey(five));
     }

     /**
      * remove(key,value) removes only if pair present
      */
     public void testRemove2() {
         Jsr166HashMap map = map5();
         map.remove(five, "E");
         assertEquals(4, map.size());
         assertFalse(map.containsKey(five));
         map.remove(four, "A");
         assertEquals(4, map.size());
         assertTrue(map.containsKey(four));

     }

     /**
      * size returns the correct values
      */
     public void testSize() {
         Jsr166HashMap map = map5();
         Jsr166HashMap empty = new Jsr166HashMap();
         assertEquals(0, empty.size());
         assertEquals(5, map.size());
     }

     /**
      * toString contains toString of elements
      */
     public void testToString() {
         Jsr166HashMap map = map5();
         String s = map.toString();
         for (int i = 1; i <= 5; ++i) {
             assertTrue(s.indexOf(String.valueOf(i)) >= 0);
         }
     }

     // Exception tests

     /**
      * Cannot create with negative capacity
      */
     public void testConstructor1() {
         try {
             new Jsr166HashMap(-1, 0, 1);
             shouldThrow();
         } catch (IllegalArgumentException e) {
         }
     }

     /**
      * Cannot create with negative concurrency level
      */
     public void testConstructor2() {
         try {
             new Jsr166HashMap(1, 0, -1);
             shouldThrow();
         } catch (IllegalArgumentException e) {
         }
     }

     /**
      * Cannot create with only negative capacity
      */
     public void testConstructor3() {
         try {
             new Jsr166HashMap(-1);
             shouldThrow();
         } catch (IllegalArgumentException e) {
         }
     }

     /**
      * get(null) throws NPE
      */
     public void testGet_NullPointerException() {
         try {
             Jsr166HashMap c = new Jsr166HashMap(5);
             c.get(null);
             shouldThrow();
         } catch (NullPointerException e) {
         }
     }

     /**
      * containsKey(null) throws NPE
      */
     public void testContainsKey_NullPointerException() {
         try {
             Jsr166HashMap c = new Jsr166HashMap(5);
             c.containsKey(null);
             shouldThrow();
         } catch (NullPointerException e) {
         }
     }

     /**
      * containsValue(null) throws NPE
      */
     public void testContainsValue_NullPointerException() {
         try {
             Jsr166HashMap c = new Jsr166HashMap(5);
             c.containsValue(null);
             shouldThrow();
         } catch (NullPointerException e) {
         }
     }

     /**
      * put(null,x) throws NPE
      */
     public void testPut1_NullPointerException() {
         try {
             Jsr166HashMap c = new Jsr166HashMap(5);
             c.put(null, "whatever");
             shouldThrow();
         } catch (NullPointerException e) {
         }
     }

     /**
      * put(x, null) throws NPE
      */
     public void testPut2_NullPointerException() {
         try {
             Jsr166HashMap c = new Jsr166HashMap(5);
             c.put("whatever", null);
             shouldThrow();
         } catch (NullPointerException e) {
         }
     }

     /**
      * putIfAbsent(null, x) throws NPE
      */
     public void testPutIfAbsent1_NullPointerException() {
         try {
             Jsr166HashMap c = new Jsr166HashMap(5);
             c.putIfAbsent(null, "whatever");
             shouldThrow();
         } catch (NullPointerException e) {
         }
     }

     /**
      * replace(null, x) throws NPE
      */
     public void testReplace_NullPointerException() {
         try {
             Jsr166HashMap c = new Jsr166HashMap(5);
             c.replace(null, "whatever");
             shouldThrow();
         } catch (NullPointerException e) {
         }
     }

     /**
      * replace(null, x, y) throws NPE
      */
     public void testReplaceValue_NullPointerException() {
         try {
             Jsr166HashMap c = new Jsr166HashMap(5);
             c.replace(null, one, "whatever");
             shouldThrow();
         } catch (NullPointerException e) {
         }
     }

     /**
      * putIfAbsent(x, null) throws NPE
      */
     public void testPutIfAbsent2_NullPointerException() {
         try {
             Jsr166HashMap c = new Jsr166HashMap(5);
             c.putIfAbsent("whatever", null);
             shouldThrow();
         } catch (NullPointerException e) {
         }
     }


     /**
      * replace(x, null) throws NPE
      */
     public void testReplace2_NullPointerException() {
         try {
             Jsr166HashMap c = new Jsr166HashMap(5);
             c.replace("whatever", null);
             shouldThrow();
         } catch (NullPointerException e) {
         }
     }

     /**
      * replace(x, null, y) throws NPE
      */
     public void testReplaceValue2_NullPointerException() {
         try {
             Jsr166HashMap c = new Jsr166HashMap(5);
             c.replace("whatever", null, "A");
             shouldThrow();
         } catch (NullPointerException e) {
         }
     }

     /**
      * replace(x, y, null) throws NPE
      */
     public void testReplaceValue3_NullPointerException() {
         try {
             Jsr166HashMap c = new Jsr166HashMap(5);
             c.replace("whatever", one, null);
             shouldThrow();
         } catch (NullPointerException e) {
         }
     }


     /**
      * remove(null) throws NPE
      */
     public void testRemove1_NullPointerException() {
         try {
             Jsr166HashMap c = new Jsr166HashMap(5);
             c.put("sadsdf", "asdads");
             c.remove(null);
             shouldThrow();
         } catch (NullPointerException e) {
         }
     }

     /**
      * remove(null, x) throws NPE
      */
     public void testRemove2_NullPointerException() {
         try {
             Jsr166HashMap c = new Jsr166HashMap(5);
             c.put("sadsdf", "asdads");
             c.remove(null, "whatever");
             shouldThrow();
         } catch (NullPointerException e) {
         }
     }

     /**
      * remove(x, null) returns false
      */
     public void testRemove3() {
         try {
             Jsr166HashMap c = new Jsr166HashMap(5);
             c.put("sadsdf", "asdads");
             assertFalse(c.remove("sadsdf", null));
         } catch (NullPointerException e) {
             fail();
         }
     }

     /**
      * A deserialized map equals original
      */
     // TODO: why not use SerializableTester?
     public void testSerialization() {
         Jsr166HashMap q = map5();

         try {
             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));
             Jsr166HashMap r = (Jsr166HashMap) in.readObject();
             assertEquals(q.size(), r.size());
             assertTrue(q.equals(r));
             assertTrue(r.equals(q));
         } catch (Exception e) {
             e.printStackTrace();
             unexpectedException();
         }
     }


     /**
      * SetValue of an EntrySet entry sets value in the map.
      */
     public void testSetValueWriteThrough() {
         // Adapted from a bug report by Eric Zoerner
         Jsr166HashMap map = new Jsr166HashMap(2, 5.0f, 1);
         assertTrue(map.isEmpty());
         for (int i = 0; i < 20; i++) {
             map.put(new Integer(i), new Integer(i));
         }
         assertFalse(map.isEmpty());
         Map.Entry entry1 = (Map.Entry) map.entrySet().iterator().next();

         // assert that entry1 is not 16
         assertTrue("entry is 16, test not valid",
                 !entry1.getKey().equals(new Integer(16)));

         // remove 16 (a different key) from map
         // which just happens to cause entry1 to be cloned in map
         map.remove(new Integer(16));
         entry1.setValue("XYZ");
         assertTrue(map.containsValue("XYZ")); // fails
     }

 }
	/*
	* 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
	* Other contributors include Andrew Wright, Jeffrey Hayes,
	* Pat Fisher, Mike Judd.
	*/

	package com.google.common.collect;

	import junit.framework.TestCase;

	import java.io.BufferedInputStream;
	import java.io.BufferedOutputStream;
	import java.io.ByteArrayInputStream;
	import java.io.ByteArrayOutputStream;
	import java.io.ObjectInputStream;
	import java.io.ObjectOutputStream;
	import java.util.ArrayList;
	import java.util.Arrays;
	import java.util.Collection;
	import java.util.Iterator;
	import java.util.Map;
	import java.util.Set;

	/**
	* ConcurrentHashMap tests copied from ConcurrentHashMapTest. Useful as a
	* test case for CustomConcurrentHashMap.
	*/
	@SuppressWarnings("unchecked")
	public class Jsr166HashMapTest extends TestCase {

	/*
	* The following two methods and constants were copied from JSR166TestCase.
	*/

	/**
	* fail with message "should throw exception"
	*/
	public void shouldThrow() {
	fail("Should throw exception");
	}

	/**
	* fail with message "Unexpected exception"
	*/
	public void unexpectedException() {
	fail("Unexpected exception");
	}

	static final Integer zero = new Integer(0);
	static final Integer one = new Integer(1);
	static final Integer two = new Integer(2);
	static final Integer three = new Integer(3);
	static final Integer four = new Integer(4);
	static final Integer five = new Integer(5);
	static final Integer six = new Integer(6);
	static final Integer seven = new Integer(7);
	static final Integer eight = new Integer(8);
	static final Integer nine = new Integer(9);
	static final Integer m1 = new Integer(-1);
	static final Integer m2 = new Integer(-2);
	static final Integer m3 = new Integer(-3);
	static final Integer m4 = new Integer(-4);
	static final Integer m5 = new Integer(-5);
	static final Integer m6 = new Integer(-6);
	static final Integer m10 = new Integer(-10);

	/**
	* Create a map from Integers 1-5 to Strings "A"-"E".
	*/
	private static Jsr166HashMap map5() {
	Jsr166HashMap map = new Jsr166HashMap(5);
	assertTrue(map.isEmpty());
	map.put(one, "A");
	map.put(two, "B");
	map.put(three, "C");
	map.put(four, "D");
	map.put(five, "E");
	assertFalse(map.isEmpty());
	assertEquals(5, map.size());
	return map;
	}

	/**
	* clear removes all pairs
	*/
	public void testClear() {
	Jsr166HashMap map = map5();
	map.clear();
	assertEquals(map.size(), 0);
	}

	/**
	* Maps with same contents are equal
	*/
	public void testEquals() {
	Jsr166HashMap map1 = map5();
	Jsr166HashMap map2 = map5();
	assertEquals(map1, map2);
	assertEquals(map2, map1);
	map1.clear();
	assertFalse(map1.equals(map2));
	assertFalse(map2.equals(map1));
	}

	/**
	* containsKey returns true for contained key
	*/
	public void testContainsKey() {
	Jsr166HashMap map = map5();
	assertTrue(map.containsKey(one));
	assertFalse(map.containsKey(zero));
	}

	/**
	* containsValue returns true for held values
	*/
	public void testContainsValue() {
	Jsr166HashMap map = map5();
	assertTrue(map.containsValue("A"));
	assertFalse(map.containsValue("Z"));
	}

	/**
	* get returns the correct element at the given key, or null if not present
	*/
	public void testGet() {
	Jsr166HashMap map = map5();
	assertEquals("A", (String) map.get(one));
	Jsr166HashMap empty = new Jsr166HashMap();
	assertNull(map.get("anything"));
	}

	/**
	* isEmpty is true of empty map and false for non-empty
	*/
	public void testIsEmpty() {
	Jsr166HashMap empty = new Jsr166HashMap();
	Jsr166HashMap map = map5();
	assertTrue(empty.isEmpty());
	assertFalse(map.isEmpty());
	}

	/**
	* keySet returns a Set containing all the keys
	*/
	public void testKeySet() {
	Jsr166HashMap map = map5();
	Set s = map.keySet();
	assertEquals(5, s.size());
	assertTrue(s.contains(one));
	assertTrue(s.contains(two));
	assertTrue(s.contains(three));
	assertTrue(s.contains(four));
	assertTrue(s.contains(five));
	}

	/**
	* keySet.toArray returns contains all keys
	*/
	public void testKeySetToArray() {
	Jsr166HashMap map = map5();
	Set s = map.keySet();
	Object[] ar = s.toArray();
	assertTrue(s.containsAll(Arrays.asList(ar)));
	assertEquals(5, ar.length);
	ar[0] = m10;
	assertFalse(s.containsAll(Arrays.asList(ar)));
	}

	/**
	* Values.toArray contains all values
	*/
	public void testValuesToArray() {
	Jsr166HashMap map = map5();
	Collection v = map.values();
	Object[] ar = v.toArray();
	ArrayList s = new ArrayList(Arrays.asList(ar));
	assertEquals(5, ar.length);
	assertTrue(s.contains("A"));
	assertTrue(s.contains("B"));
	assertTrue(s.contains("C"));
	assertTrue(s.contains("D"));
	assertTrue(s.contains("E"));
	}

	/**
	* entrySet.toArray contains all entries
	*/
	public void testEntrySetToArray() {
	Jsr166HashMap map = map5();
	Set s = map.entrySet();
	Object[] ar = s.toArray();
	assertEquals(5, ar.length);
	for (int i = 0; i < 5; ++i) {
	assertTrue(map.containsKey(((Map.Entry) (ar[i])).getKey()));
	assertTrue(map.containsValue(((Map.Entry) (ar[i])).getValue()));
	}
	}

	/**
	* values collection contains all values
	*/
	public void testValues() {
	Jsr166HashMap map = map5();
	Collection s = map.values();
	assertEquals(5, s.size());
	assertTrue(s.contains("A"));
	assertTrue(s.contains("B"));
	assertTrue(s.contains("C"));
	assertTrue(s.contains("D"));
	assertTrue(s.contains("E"));
	}

	/**
	* entrySet contains all pairs
	*/
	public void testEntrySet() {
	Jsr166HashMap map = map5();
	Set s = map.entrySet();
	assertEquals(5, s.size());
	Iterator it = s.iterator();
	while (it.hasNext()) {
	Map.Entry e = (Map.Entry) it.next();
	assertTrue(
	(e.getKey().equals(one) && e.getValue().equals("A")) \|\|
	(e.getKey().equals(two) && e.getValue().equals("B"))
	\|\|
	(e.getKey().equals(three) && e.getValue()
	.equals("C")) \|\|
	(e.getKey().equals(four) && e.getValue()
	.equals("D")) \|\|
	(e.getKey().equals(five) && e.getValue()
	.equals("E")));
	}
	}

	/**
	* putAll adds all key-value pairs from the given map
	*/
	public void testPutAll() {
	Jsr166HashMap empty = new Jsr166HashMap();
	Jsr166HashMap map = map5();
	empty.putAll(map);
	assertEquals(5, empty.size());
	assertTrue(empty.containsKey(one));
	assertTrue(empty.containsKey(two));
	assertTrue(empty.containsKey(three));
	assertTrue(empty.containsKey(four));
	assertTrue(empty.containsKey(five));
	}

	/**
	* putIfAbsent works when the given key is not present
	*/
	public void testPutIfAbsent() {
	Jsr166HashMap map = map5();
	map.putIfAbsent(six, "Z");
	assertTrue(map.containsKey(six));
	}

	/**
	* putIfAbsent does not add the pair if the key is already present
	*/
	public void testPutIfAbsent2() {
	Jsr166HashMap map = map5();
	assertEquals("A", map.putIfAbsent(one, "Z"));
	}

	/**
	* replace fails when the given key is not present
	*/
	public void testReplace() {
	Jsr166HashMap map = map5();
	assertNull(map.replace(six, "Z"));
	assertFalse(map.containsKey(six));
	}

	/**
	* replace succeeds if the key is already present
	*/
	public void testReplace2() {
	Jsr166HashMap map = map5();
	assertNotNull(map.replace(one, "Z"));
	assertEquals("Z", map.get(one));
	}


	/**
	* replace value fails when the given key not mapped to expected value
	*/
	public void testReplaceValue() {
	Jsr166HashMap map = map5();
	assertEquals("A", map.get(one));
	assertFalse(map.replace(one, "Z", "Z"));
	assertEquals("A", map.get(one));
	}

	/**
	* replace value succeeds when the given key mapped to expected value
	*/
	public void testReplaceValue2() {
	Jsr166HashMap map = map5();
	assertEquals("A", map.get(one));
	assertTrue(map.replace(one, "A", "Z"));
	assertEquals("Z", map.get(one));
	}


	/**
	* remove removes the correct key-value pair from the map
	*/
	public void testRemove() {
	Jsr166HashMap map = map5();
	map.remove(five);
	assertEquals(4, map.size());
	assertFalse(map.containsKey(five));
	}

	/**
	* remove(key,value) removes only if pair present
	*/
	public void testRemove2() {
	Jsr166HashMap map = map5();
	map.remove(five, "E");
	assertEquals(4, map.size());
	assertFalse(map.containsKey(five));
	map.remove(four, "A");
	assertEquals(4, map.size());
	assertTrue(map.containsKey(four));

	}

	/**
	* size returns the correct values
	*/
	public void testSize() {
	Jsr166HashMap map = map5();
	Jsr166HashMap empty = new Jsr166HashMap();
	assertEquals(0, empty.size());
	assertEquals(5, map.size());
	}

	/**
	* toString contains toString of elements
	*/
	public void testToString() {
	Jsr166HashMap map = map5();
	String s = map.toString();
	for (int i = 1; i <= 5; ++i) {
	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
	}
	}

	// Exception tests

	/**
	* Cannot create with negative capacity
	*/
	public void testConstructor1() {
	try {
	new Jsr166HashMap(-1, 0, 1);
	shouldThrow();
	} catch (IllegalArgumentException e) {
	}
	}

	/**
	* Cannot create with negative concurrency level
	*/
	public void testConstructor2() {
	try {
	new Jsr166HashMap(1, 0, -1);
	shouldThrow();
	} catch (IllegalArgumentException e) {
	}
	}

	/**
	* Cannot create with only negative capacity
	*/
	public void testConstructor3() {
	try {
	new Jsr166HashMap(-1);
	shouldThrow();
	} catch (IllegalArgumentException e) {
	}
	}

	/**
	* get(null) throws NPE
	*/
	public void testGet_NullPointerException() {
	try {
	Jsr166HashMap c = new Jsr166HashMap(5);
	c.get(null);
	shouldThrow();
	} catch (NullPointerException e) {
	}
	}

	/**
	* containsKey(null) throws NPE
	*/
	public void testContainsKey_NullPointerException() {
	try {
	Jsr166HashMap c = new Jsr166HashMap(5);
	c.containsKey(null);
	shouldThrow();
	} catch (NullPointerException e) {
	}
	}

	/**
	* containsValue(null) throws NPE
	*/
	public void testContainsValue_NullPointerException() {
	try {
	Jsr166HashMap c = new Jsr166HashMap(5);
	c.containsValue(null);
	shouldThrow();
	} catch (NullPointerException e) {
	}
	}

	/**
	* put(null,x) throws NPE
	*/
	public void testPut1_NullPointerException() {
	try {
	Jsr166HashMap c = new Jsr166HashMap(5);
	c.put(null, "whatever");
	shouldThrow();
	} catch (NullPointerException e) {
	}
	}

	/**
	* put(x, null) throws NPE
	*/
	public void testPut2_NullPointerException() {
	try {
	Jsr166HashMap c = new Jsr166HashMap(5);
	c.put("whatever", null);
	shouldThrow();
	} catch (NullPointerException e) {
	}
	}

	/**
	* putIfAbsent(null, x) throws NPE
	*/
	public void testPutIfAbsent1_NullPointerException() {
	try {
	Jsr166HashMap c = new Jsr166HashMap(5);
	c.putIfAbsent(null, "whatever");
	shouldThrow();
	} catch (NullPointerException e) {
	}
	}

	/**
	* replace(null, x) throws NPE
	*/
	public void testReplace_NullPointerException() {
	try {
	Jsr166HashMap c = new Jsr166HashMap(5);
	c.replace(null, "whatever");
	shouldThrow();
	} catch (NullPointerException e) {
	}
	}

	/**
	* replace(null, x, y) throws NPE
	*/
	public void testReplaceValue_NullPointerException() {
	try {
	Jsr166HashMap c = new Jsr166HashMap(5);
	c.replace(null, one, "whatever");
	shouldThrow();
	} catch (NullPointerException e) {
	}
	}

	/**
	* putIfAbsent(x, null) throws NPE
	*/
	public void testPutIfAbsent2_NullPointerException() {
	try {
	Jsr166HashMap c = new Jsr166HashMap(5);
	c.putIfAbsent("whatever", null);
	shouldThrow();
	} catch (NullPointerException e) {
	}
	}


	/**
	* replace(x, null) throws NPE
	*/
	public void testReplace2_NullPointerException() {
	try {
	Jsr166HashMap c = new Jsr166HashMap(5);
	c.replace("whatever", null);
	shouldThrow();
	} catch (NullPointerException e) {
	}
	}

	/**
	* replace(x, null, y) throws NPE
	*/
	public void testReplaceValue2_NullPointerException() {
	try {
	Jsr166HashMap c = new Jsr166HashMap(5);
	c.replace("whatever", null, "A");
	shouldThrow();
	} catch (NullPointerException e) {
	}
	}

	/**
	* replace(x, y, null) throws NPE
	*/
	public void testReplaceValue3_NullPointerException() {
	try {
	Jsr166HashMap c = new Jsr166HashMap(5);
	c.replace("whatever", one, null);
	shouldThrow();
	} catch (NullPointerException e) {
	}
	}


	/**
	* remove(null) throws NPE
	*/
	public void testRemove1_NullPointerException() {
	try {
	Jsr166HashMap c = new Jsr166HashMap(5);
	c.put("sadsdf", "asdads");
	c.remove(null);
	shouldThrow();
	} catch (NullPointerException e) {
	}
	}

	/**
	* remove(null, x) throws NPE
	*/
	public void testRemove2_NullPointerException() {
	try {
	Jsr166HashMap c = new Jsr166HashMap(5);
	c.put("sadsdf", "asdads");
	c.remove(null, "whatever");
	shouldThrow();
	} catch (NullPointerException e) {
	}
	}

	/**
	* remove(x, null) returns false
	*/
	public void testRemove3() {
	try {
	Jsr166HashMap c = new Jsr166HashMap(5);
	c.put("sadsdf", "asdads");
	assertFalse(c.remove("sadsdf", null));
	} catch (NullPointerException e) {
	fail();
	}
	}

	/**
	* A deserialized map equals original
	*/
	// TODO: why not use SerializableTester?
	public void testSerialization() {
	Jsr166HashMap q = map5();

	try {
	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));
	Jsr166HashMap r = (Jsr166HashMap) in.readObject();
	assertEquals(q.size(), r.size());
	assertTrue(q.equals(r));
	assertTrue(r.equals(q));
	} catch (Exception e) {
	e.printStackTrace();
	unexpectedException();
	}
	}


	/**
	* SetValue of an EntrySet entry sets value in the map.
	*/
	public void testSetValueWriteThrough() {
	// Adapted from a bug report by Eric Zoerner
	Jsr166HashMap map = new Jsr166HashMap(2, 5.0f, 1);
	assertTrue(map.isEmpty());
	for (int i = 0; i < 20; i++) {
	map.put(new Integer(i), new Integer(i));
	}
	assertFalse(map.isEmpty());
	Map.Entry entry1 = (Map.Entry) map.entrySet().iterator().next();

	// assert that entry1 is not 16
	assertTrue("entry is 16, test not valid",
	!entry1.getKey().equals(new Integer(16)));

	// remove 16 (a different key) from map
	// which just happens to cause entry1 to be cloned in map
	map.remove(new Integer(16));
	entry1.setValue("XYZ");
	assertTrue(map.containsValue("XYZ")); // fails
	}

	}