--- jsr166/src/test/tck/ConcurrentHashMapTest.java	2003/11/28 12:38:08	1.6
+++ jsr166/src/test/tck/ConcurrentHashMapTest.java	2003/12/27 19:26:43	1.9
@@ -1,8 +1,9 @@
 /*
- * Written by members of JCP JSR-166 Expert Group and released to the
- * public domain. Use, modify, and redistribute this code in any way
- * without acknowledgement. Other contributors include Andrew Wright,
- * Jeffrey Hayes, Pat Fischer, Mike Judd.
+ * 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. 
  */
 
 import junit.framework.*;
@@ -210,8 +211,8 @@ public class ConcurrentHashMapTest exten
      */
     public void testPutIfAbsent() {
         ConcurrentHashMap map = map5();
-	map.putIfAbsent(new Integer(6), "Z");
-        assertTrue(map.containsKey(new Integer(6)));
+	map.putIfAbsent(six, "Z");
+        assertTrue(map.containsKey(six));
     }
 
     /**
@@ -223,6 +224,46 @@ public class ConcurrentHashMapTest exten
     }
 
     /**
+     *   replace fails when the given key is not present
+     */
+    public void testReplace() {
+        ConcurrentHashMap map = map5();
+	assertNull(map.replace(six, "Z"));
+        assertFalse(map.containsKey(six));
+    }
+
+    /**
+     *   replace succeeds if the key is already present
+     */
+    public void testReplace2() {
+        ConcurrentHashMap 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() {
+        ConcurrentHashMap 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() {
+        ConcurrentHashMap 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() {
@@ -377,6 +418,28 @@ public class ConcurrentHashMapTest exten
     }
 
     /**
+     * replace(null, x) throws NPE
+     */
+    public void testReplace_NullPointerException() {
+        try {
+            ConcurrentHashMap c = new ConcurrentHashMap(5);
+            c.replace(null, "whatever");
+            shouldThrow();
+        } catch(NullPointerException e){}
+    }
+
+    /**
+     * replace(null, x, y) throws NPE
+     */
+    public void testReplaceValue_NullPointerException() {
+        try {
+            ConcurrentHashMap c = new ConcurrentHashMap(5);
+            c.replace(null, one, "whatever");
+            shouldThrow();
+        } catch(NullPointerException e){}
+    }
+
+    /**
      * putIfAbsent(x, null) throws NPE
      */
     public void testPutIfAbsent2_NullPointerException() {
@@ -386,6 +449,40 @@ public class ConcurrentHashMapTest exten
             shouldThrow();
         } catch(NullPointerException e){}
     }
+
+
+    /**
+     * replace(x, null) throws NPE
+     */
+    public void testReplace2_NullPointerException() {
+        try {
+            ConcurrentHashMap c = new ConcurrentHashMap(5);
+            c.replace("whatever", null);
+            shouldThrow();
+        } catch(NullPointerException e){}
+    }
+
+    /**
+     * replace(x, null, y) throws NPE
+     */
+    public void testReplaceValue2_NullPointerException() {
+        try {
+            ConcurrentHashMap c = new ConcurrentHashMap(5);
+            c.replace("whatever", null, "A");
+            shouldThrow();
+        } catch(NullPointerException e){}
+    }
+
+    /**
+     * replace(x, y, null) throws NPE
+     */
+    public void testReplaceValue3_NullPointerException() {
+        try {
+            ConcurrentHashMap c = new ConcurrentHashMap(5);
+            c.replace("whatever", one, null);
+            shouldThrow();
+        } catch(NullPointerException e){}
+    }
 
 
     /**