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From telli...@apache.org
Subject svn commit: r696265 - /harmony/enhanced/classlib/trunk/modules/luni/src/test/api/common/org/apache/harmony/luni/tests/java/util/BitSetTest.java
Date Wed, 17 Sep 2008 12:06:56 GMT
Author: tellison
Date: Wed Sep 17 05:06:55 2008
New Revision: 696265

URL: http://svn.apache.org/viewvc?rev=696265&view=rev
Log:
Apply patch HARMONY-5985 ([classlib][luni] - add tests for BitSet)

Modified:
    harmony/enhanced/classlib/trunk/modules/luni/src/test/api/common/org/apache/harmony/luni/tests/java/util/BitSetTest.java

Modified: harmony/enhanced/classlib/trunk/modules/luni/src/test/api/common/org/apache/harmony/luni/tests/java/util/BitSetTest.java
URL: http://svn.apache.org/viewvc/harmony/enhanced/classlib/trunk/modules/luni/src/test/api/common/org/apache/harmony/luni/tests/java/util/BitSetTest.java?rev=696265&r1=696264&r2=696265&view=diff
==============================================================================
--- harmony/enhanced/classlib/trunk/modules/luni/src/test/api/common/org/apache/harmony/luni/tests/java/util/BitSetTest.java (original)
+++ harmony/enhanced/classlib/trunk/modules/luni/src/test/api/common/org/apache/harmony/luni/tests/java/util/BitSetTest.java Wed Sep 17 05:06:55 2008
@@ -23,42 +23,1395 @@
 
 public class BitSetTest extends TestCase {
 
-	/**
-	 * @tests java.util.BitSet#clear(int, int)
-	 */
-	public void test_clearII() {
-		// Regression for HARMONY-98
-		BitSet bitset = new BitSet();
-		for (int i = 0; i < 20; i++) {
-			bitset.set(i);
-		}
-		bitset.clear(10, 10);
-	}
-
-	/**
-	 * @tests java.util.BitSet#clear(int, int)
-	 */
-	public void test_flipII() {
-		BitSet bitset = new BitSet();
-		for (int i = 0; i < 20; i++) {
-			bitset.set(i);
-		}
-		bitset.flip(10, 10);
-	}
-
-	/**
-	 * @tests java.util.BitSet#get(int, int)
-	 */
-	public void test_getII() {
-		BitSet bitset = new BitSet(30);
-		bitset.get(3, 3);
-	}
-
-	/**
-	 * @tests java.util.BitSet#set(int, int)
-	 */
-	public void test_setII() {
-		BitSet bitset = new BitSet(30);
-		bitset.set(29, 29);
-	}
+    BitSet eightbs;
+
+    /**
+     * @tests java.util.BitSet#BitSet()
+     */
+    public void test_Constructor() {
+        BitSet bs = new BitSet();
+        assertTrue("Create BitSet of incorrect size", bs.size() == 64);
+        assertEquals("New BitSet had invalid string representation", "{}", bs
+                .toString());
+    }
+
+    /**
+     * @tests java.util.BitSet#BitSet(int)
+     */
+    public void test_ConstructorI() {
+        BitSet bs = new BitSet(128);
+        assertTrue("Create BitSet of incorrect size", bs.size() == 128);
+        assertEquals("New BitSet had invalid string representation: "
+                + bs.toString(), "{}", bs.toString());
+        // All BitSets are created with elements of multiples of 64
+        bs = new BitSet(89);
+        assertTrue("Failed to round BitSet element size", bs.size() == 128);
+
+        try {
+            bs = new BitSet(-9);
+            fail("Failed to throw exception when creating a new BitSet with negative element value");
+        } catch (NegativeArraySizeException e) {
+            // Correct behaviour
+        }
+    }
+
+    /**
+     * tests java.util.BitSet#clone()
+     */
+    public void test_clone() {
+        BitSet bs;
+        bs = (BitSet) eightbs.clone();
+        assertEquals("clone failed to return equal BitSet", bs, eightbs);
+    }
+
+    /**
+     * @tests java.util.BitSet#equals(java.lang.Object)
+     */
+    public void test_equalsLjava_lang_Object() {
+        BitSet bs;
+        bs = (BitSet) eightbs.clone();
+        assertEquals("Same BitSet returned false", eightbs, eightbs);
+        assertEquals("Identical BitSet returned false", bs, eightbs);
+        bs.clear(6);
+        assertFalse("Different BitSets returned true", eightbs.equals(bs));
+
+        bs = (BitSet) eightbs.clone();
+        bs.set(128);
+        assertFalse("Different sized BitSet with higher bit set returned true",
+                eightbs.equals(bs));
+        bs.clear(128);
+        assertTrue(
+                "Different sized BitSet with higher bits not set returned false",
+                eightbs.equals(bs));
+    }
+
+    /**
+     * @tests java.util.BitSet#hashCode()
+     */
+    public void test_hashCode() {
+        // Test for method int java.util.BitSet.hashCode()
+        BitSet bs = (BitSet) eightbs.clone();
+        bs.clear(2);
+        bs.clear(6);
+        assertTrue("BitSet returns wrong hash value: " + bs.hashCode(), bs
+                .hashCode() == 1129);
+        bs.set(10);
+        bs.clear(3);
+        assertTrue("BitSet returns wrong hash value: " + bs.hashCode(), bs
+                .hashCode() == 97);
+    }
+
+    /**
+     * @tests java.util.BitSet#clear()
+     */
+    public void test_clear() {
+        eightbs.clear();
+        for (int i = 0; i < 8; i++) {
+            assertFalse("Clear didn't clear bit " + i, eightbs.get(i));
+        }
+        assertEquals("Test1: Wrong length", 0, eightbs.length());
+
+        BitSet bs = new BitSet(3400);
+        bs.set(0, bs.size() - 1); // ensure all bits are 1's
+        bs.set(bs.size() - 1);
+        bs.clear();
+        assertEquals("Test2: Wrong length", 0, bs.length());
+        assertTrue("Test2: isEmpty() returned incorrect value", bs.isEmpty());
+        assertEquals("Test2: cardinality() returned incorrect value", 0, bs
+                .cardinality());
+    }
+
+    /**
+     * @tests java.util.BitSet#clear(int)
+     */
+    public void test_clearI() {
+        // Test for method void java.util.BitSet.clear(int)
+
+        eightbs.clear(7);
+        assertFalse("Failed to clear bit", eightbs.get(7));
+
+        // Check to see all other bits are still set
+        for (int i = 0; i < 7; i++)
+            assertTrue("Clear cleared incorrect bits", eightbs.get(i));
+
+        eightbs.clear(165);
+        assertFalse("Failed to clear bit", eightbs.get(165));
+        // Try out of range
+        try {
+            eightbs.clear(-1);
+            fail("Failed to throw out of bounds exception");
+        } catch (IndexOutOfBoundsException e) {
+            // Correct behaviour
+        }
+
+        BitSet bs = new BitSet(0);
+        assertEquals("Test1: Wrong length,", 0, bs.length());
+        assertEquals("Test1: Wrong size,", 0, bs.size());
+
+        bs.clear(0);
+        assertEquals("Test2: Wrong length,", 0, bs.length());
+        assertEquals("Test2: Wrong size,", 0, bs.size());
+
+        bs.clear(60);
+        assertEquals("Test3: Wrong length,", 0, bs.length());
+        assertEquals("Test3: Wrong size,", 0, bs.size());
+
+        bs.clear(120);
+        assertEquals("Test4: Wrong size,", 0, bs.size());
+        assertEquals("Test4: Wrong length,", 0, bs.length());
+
+        bs.set(25);
+        assertEquals("Test5: Wrong size,", 64, bs.size());
+        assertEquals("Test5: Wrong length,", 26, bs.length());
+
+        bs.clear(80);
+        assertEquals("Test6: Wrong size,", 64, bs.size());
+        assertEquals("Test6: Wrong length,", 26, bs.length());
+
+        bs.clear(25);
+        assertEquals("Test7: Wrong size,", 64, bs.size());
+        assertEquals("Test7: Wrong length,", 0, bs.length());
+    }
+
+    /**
+     * @tests java.util.BitSet#clear(int, int)
+     */
+    public void test_clearII() {
+        // Regression for HARMONY-98
+        BitSet bitset = new BitSet();
+        for (int i = 0; i < 20; i++) {
+            bitset.set(i);
+        }
+        bitset.clear(10, 10);
+
+        // Test for method void java.util.BitSet.clear(int, int)
+        // pos1 and pos2 are in the same bitset element
+        BitSet bs = new BitSet(16);
+        int initialSize = bs.size();
+        bs.set(0, initialSize);
+        bs.clear(5);
+        bs.clear(15);
+        bs.clear(7, 11);
+        for (int i = 0; i < 7; i++) {
+            if (i == 5)
+                assertFalse("Shouldn't have flipped bit " + i, bs.get(i));
+            else
+                assertTrue("Shouldn't have cleared bit " + i, bs.get(i));
+        }
+        for (int i = 7; i < 11; i++)
+            assertFalse("Failed to clear bit " + i, bs.get(i));
+
+        for (int i = 11; i < initialSize; i++) {
+            if (i == 15)
+                assertFalse("Shouldn't have flipped bit " + i, bs.get(i));
+            else
+                assertTrue("Shouldn't have cleared bit " + i, bs.get(i));
+        }
+
+        for (int i = initialSize; i < bs.size(); i++) {
+            assertFalse("Shouldn't have flipped bit " + i, bs.get(i));
+        }
+
+        // pos1 and pos2 is in the same bitset element, boundry testing
+        bs = new BitSet(16);
+        initialSize = bs.size();
+        bs.set(0, initialSize);
+        bs.clear(7, 64);
+        assertTrue("Failed to grow BitSet", bs.size() == 64);
+        for (int i = 0; i < 7; i++)
+            assertTrue("Shouldn't have cleared bit " + i, bs.get(i));
+        for (int i = 7; i < 64; i++)
+            assertFalse("Failed to clear bit " + i, bs.get(i));
+        for (int i = 64; i < bs.size(); i++) {
+            assertTrue("Shouldn't have flipped bit " + i, !bs.get(i));
+        }
+        // more boundary testing
+        bs = new BitSet(32);
+        initialSize = bs.size();
+        bs.set(0, initialSize);
+        bs.clear(0, 64);
+        for (int i = 0; i < 64; i++)
+            assertFalse("Failed to clear bit " + i, bs.get(i));
+        for (int i = 64; i < bs.size(); i++) {
+            assertFalse("Shouldn't have flipped bit " + i, bs.get(i));
+        }
+
+        bs = new BitSet(32);
+        initialSize = bs.size();
+        bs.set(0, initialSize);
+        bs.clear(0, 65);
+        for (int i = 0; i < 65; i++)
+            assertFalse("Failed to clear bit " + i, bs.get(i));
+        for (int i = 65; i < bs.size(); i++) {
+            assertFalse("Shouldn't have flipped bit " + i, bs.get(i));
+        }
+
+        // pos1 and pos2 are in two sequential bitset elements
+        bs = new BitSet(128);
+        initialSize = bs.size();
+        bs.set(0, initialSize);
+        bs.clear(7);
+        bs.clear(110);
+        bs.clear(9, 74);
+        for (int i = 0; i < 9; i++) {
+            if (i == 7)
+                assertFalse("Shouldn't have flipped bit " + i, bs.get(i));
+            else
+                assertTrue("Shouldn't have cleared bit " + i, bs.get(i));
+        }
+        for (int i = 9; i < 74; i++)
+            assertFalse("Failed to clear bit " + i, bs.get(i));
+        for (int i = 74; i < initialSize; i++) {
+            if (i == 110)
+                assertFalse("Shouldn't have flipped bit " + i, bs.get(i));
+            else
+                assertTrue("Shouldn't have cleared bit " + i, bs.get(i));
+        }
+        for (int i = initialSize; i < bs.size(); i++) {
+            assertFalse("Shouldn't have flipped bit " + i, bs.get(i));
+        }
+
+        // pos1 and pos2 are in two non-sequential bitset elements
+        bs = new BitSet(256);
+        bs.set(0, 256);
+        bs.clear(7);
+        bs.clear(255);
+        bs.clear(9, 219);
+        for (int i = 0; i < 9; i++) {
+            if (i == 7)
+                assertFalse("Shouldn't have flipped bit " + i, bs.get(i));
+            else
+                assertTrue("Shouldn't have cleared bit " + i, bs.get(i));
+        }
+
+        for (int i = 9; i < 219; i++)
+            assertFalse("failed to clear bit " + i, bs.get(i));
+
+        for (int i = 219; i < 255; i++)
+            assertTrue("Shouldn't have cleared bit " + i, bs.get(i));
+
+        for (int i = 255; i < bs.size(); i++)
+            assertFalse("Shouldn't have flipped bit " + i, bs.get(i));
+
+        // test illegal args
+        bs = new BitSet(10);
+        try {
+            bs.clear(-1, 3);
+            fail("Test1: Attempt to flip with  negative index failed to generate exception");
+        } catch (IndexOutOfBoundsException e) {
+            // excepted
+        }
+
+        try {
+            bs.clear(2, -1);
+            fail("Test2: Attempt to flip with negative index failed to generate exception");
+        } catch (IndexOutOfBoundsException e) {
+            // excepted
+        }
+
+        bs.set(2, 4);
+        try {
+            bs.clear(2, 2);
+            assertTrue("Bit got cleared incorrectly ", bs.get(2));
+        } catch (IndexOutOfBoundsException e) {
+            fail("unexpected IndexOutOfBoundsException: " + e);
+        }
+
+        try {
+            bs.clear(4, 2);
+            fail("Test4: Attempt to flip with illegal args failed to generate exception");
+        } catch (IndexOutOfBoundsException e) {
+            // excepted
+        }
+
+        bs = new BitSet(0);
+        assertEquals("Test1: Wrong length,", 0, bs.length());
+        assertEquals("Test1: Wrong size,", 0, bs.size());
+
+        bs.clear(0, 2);
+        assertEquals("Test2: Wrong length,", 0, bs.length());
+        assertEquals("Test2: Wrong size,", 0, bs.size());
+
+        bs.clear(60, 64);
+        assertEquals("Test3: Wrong length,", 0, bs.length());
+        assertEquals("Test3: Wrong size,", 0, bs.size());
+
+        bs.clear(64, 120);
+        assertEquals("Test4: Wrong length,", 0, bs.length());
+        assertEquals("Test4: Wrong size,", 0, bs.size());
+
+        bs.set(25);
+        assertEquals("Test5: Wrong length,", 26, bs.length());
+        assertEquals("Test5: Wrong size,", 64, bs.size());
+
+        bs.clear(60, 64);
+        assertEquals("Test6: Wrong length,", 26, bs.length());
+        assertEquals("Test6: Wrong size,", 64, bs.size());
+
+        bs.clear(64, 120);
+        assertEquals("Test7: Wrong size,", 64, bs.size());
+        assertEquals("Test7: Wrong length,", 26, bs.length());
+
+        bs.clear(80);
+        assertEquals("Test8: Wrong size,", 64, bs.size());
+        assertEquals("Test8: Wrong length,", 26, bs.length());
+
+        bs.clear(25);
+        assertEquals("Test9: Wrong size,", 64, bs.size());
+        assertEquals("Test9: Wrong length,", 0, bs.length());
+    }
+
+    /**
+     * @tests java.util.BitSet#get(int)
+     */
+    public void test_getI() {
+        // Test for method boolean java.util.BitSet.get(int)
+
+        BitSet bs = new BitSet();
+        bs.set(8);
+        assertFalse("Get returned true for index out of range", eightbs.get(99));
+        assertTrue("Get returned false for set value", eightbs.get(3));
+        assertFalse("Get returned true for a non set value", bs.get(0));
+
+        try {
+            bs.get(-1);
+            fail("Attempt to get at negative index failed to generate exception");
+        } catch (IndexOutOfBoundsException e) {
+            // Correct behaviour
+        }
+
+        bs = new BitSet(1);
+        assertFalse("Access greater than size", bs.get(64));
+
+        bs = new BitSet();
+        bs.set(63);
+        assertTrue("Test highest bit", bs.get(63));
+
+        bs = new BitSet(0);
+        assertEquals("Test1: Wrong length,", 0, bs.length());
+        assertEquals("Test1: Wrong size,", 0, bs.size());
+
+        bs.get(2);
+        assertEquals("Test2: Wrong length,", 0, bs.length());
+        assertEquals("Test2: Wrong size,", 0, bs.size());
+
+        bs.get(70);
+        assertEquals("Test3: Wrong length,", 0, bs.length());
+        assertEquals("Test3: Wrong size,", 0, bs.size());
+
+    }
+
+    /**
+     * @tests java.util.BitSet#get(int, int)
+     */
+    public void test_getII() {
+        BitSet bitset = new BitSet(30);
+        bitset.get(3, 3);
+               
+        // Test for method boolean java.util.BitSet.get(int, int)
+        BitSet bs, resultbs, correctbs;
+        bs = new BitSet(512);
+        bs.set(3, 9);
+        bs.set(10, 20);
+        bs.set(60, 75);
+        bs.set(121);
+        bs.set(130, 140);
+
+        // pos1 and pos2 are in the same bitset element, at index0
+        resultbs = bs.get(3, 6);
+        correctbs = new BitSet(3);
+        correctbs.set(0, 3);
+        assertEquals("Test1: Returned incorrect BitSet", correctbs, resultbs);
+
+        // pos1 and pos2 are in the same bitset element, at index 1
+        resultbs = bs.get(100, 125);
+        correctbs = new BitSet(25);
+        correctbs.set(21);
+        assertEquals("Test2: Returned incorrect BitSet", correctbs, resultbs);
+
+        // pos1 in bitset element at index 0, and pos2 in bitset element at
+        // index 1
+        resultbs = bs.get(15, 125);
+        correctbs = new BitSet(25);
+        correctbs.set(0, 5);
+        correctbs.set(45, 60);
+        correctbs.set(121 - 15);
+        assertEquals("Test3: Returned incorrect BitSet", correctbs, resultbs);
+
+        // pos1 in bitset element at index 1, and pos2 in bitset element at
+        // index 2
+        resultbs = bs.get(70, 145);
+        correctbs = new BitSet(75);
+        correctbs.set(0, 5);
+        correctbs.set(51);
+        correctbs.set(60, 70);
+        assertEquals("Test4: Returned incorrect BitSet", correctbs, resultbs);
+
+        // pos1 in bitset element at index 0, and pos2 in bitset element at
+        // index 2
+        resultbs = bs.get(5, 145);
+        correctbs = new BitSet(140);
+        correctbs.set(0, 4);
+        correctbs.set(5, 15);
+        correctbs.set(55, 70);
+        correctbs.set(116);
+        correctbs.set(125, 135);
+        assertEquals("Test5: Returned incorrect BitSet", correctbs, resultbs);
+
+        // pos1 in bitset element at index 0, and pos2 in bitset element at
+        // index 3
+        resultbs = bs.get(5, 250);
+        correctbs = new BitSet(200);
+        correctbs.set(0, 4);
+        correctbs.set(5, 15);
+        correctbs.set(55, 70);
+        correctbs.set(116);
+        correctbs.set(125, 135);
+        assertEquals("Test6: Returned incorrect BitSet", correctbs, resultbs);
+
+        assertEquals("equality principle 1 ", bs.get(0, bs.size()), bs);
+
+        // more tests
+        BitSet bs2 = new BitSet(129);
+        bs2.set(0, 20);
+        bs2.set(62, 65);
+        bs2.set(121, 123);
+        resultbs = bs2.get(1, 124);
+        correctbs = new BitSet(129);
+        correctbs.set(0, 19);
+        correctbs.set(61, 64);
+        correctbs.set(120, 122);
+        assertEquals("Test7: Returned incorrect BitSet", correctbs, resultbs);
+
+        // equality principle with some boundary conditions
+        bs2 = new BitSet(128);
+        bs2.set(2, 20);
+        bs2.set(62);
+        bs2.set(121, 123);
+        bs2.set(127);
+        resultbs = bs2.get(0, bs2.size());
+        assertEquals("equality principle 2 ", resultbs, bs2);
+
+        bs2 = new BitSet(128);
+        bs2.set(2, 20);
+        bs2.set(62);
+        bs2.set(121, 123);
+        bs2.set(127);
+        bs2.flip(0, 128);
+        resultbs = bs2.get(0, bs.size());
+        assertEquals("equality principle 3 ", resultbs, bs2);
+
+        bs = new BitSet(0);
+        assertEquals("Test1: Wrong length,", 0, bs.length());
+        assertEquals("Test1: Wrong size,", 0, bs.size());
+
+        bs.get(0, 2);
+        assertEquals("Test2: Wrong length,", 0, bs.length());
+        assertEquals("Test2: Wrong size,", 0, bs.size());
+
+        bs.get(60, 64);
+        assertEquals("Test3: Wrong length,", 0, bs.length());
+        assertEquals("Test3: Wrong size,", 0, bs.size());
+
+        bs.get(64, 120);
+        assertEquals("Test4: Wrong length,", 0, bs.length());
+        assertEquals("Test4: Wrong size,", 0, bs.size());
+
+        bs.set(25);
+        assertEquals("Test5: Wrong length,", 26, bs.length());
+        assertEquals("Test5: Wrong size,", 64, bs.size());
+
+        bs.get(60, 64);
+        assertEquals("Test6: Wrong length,", 26, bs.length());
+        assertEquals("Test6: Wrong size,", 64, bs.size());
+
+        bs.get(64, 120);
+        assertEquals("Test7: Wrong size,", 64, bs.size());
+        assertEquals("Test7: Wrong length,", 26, bs.length());
+
+        bs.get(80);
+        assertEquals("Test8: Wrong size,", 64, bs.size());
+        assertEquals("Test8: Wrong length,", 26, bs.length());
+
+        bs.get(25);
+        assertEquals("Test9: Wrong size,", 64, bs.size());
+        assertEquals("Test9: Wrong length,", 26, bs.length());
+
+    }
+
+    /**
+     * @tests java.util.BitSet#flip(int)
+     */
+    public void test_flipI() {
+        // Test for method void java.util.BitSet.flip(int)
+        BitSet bs = new BitSet();
+        bs.clear(8);
+        bs.clear(9);
+        bs.set(10);
+        bs.flip(9);
+        assertFalse("Failed to flip bit", bs.get(8));
+        assertTrue("Failed to flip bit", bs.get(9));
+        assertTrue("Failed to flip bit", bs.get(10));
+
+        bs.set(8);
+        bs.set(9);
+        bs.clear(10);
+        bs.flip(9);
+        assertTrue("Failed to flip bit", bs.get(8));
+        assertFalse("Failed to flip bit", bs.get(9));
+        assertFalse("Failed to flip bit", bs.get(10));
+
+        try {
+            bs.flip(-1);
+            fail("Attempt to flip at negative index failed to generate exception");
+        } catch (IndexOutOfBoundsException e) {
+            // Correct behaviour
+        }
+
+        // Try setting a bit on a 64 boundary
+        bs.flip(128);
+        assertTrue("Failed to grow BitSet", bs.size() == 192);
+        assertTrue("Failed to flip bit", bs.get(128));
+
+        bs = new BitSet(64);
+        for (int i = bs.size(); --i >= 0;) {
+            bs.flip(i);
+            assertTrue("Test1: Incorrectly flipped bit" + i, bs.get(i));
+            assertTrue("Incorrect length", bs.length() == (i + 1));
+            for (int j = bs.size(); --j > i;) {
+                assertTrue("Test2: Incorrectly flipped bit" + j, !bs.get(j));
+            }
+            for (int j = i; --j >= 0;) {
+                assertTrue("Test3: Incorrectly flipped bit" + j, !bs.get(j));
+            }
+            bs.flip(i);
+        }
+
+        BitSet bs0 = new BitSet(0);
+        assertTrue("Test1: Wrong size", bs0.size() == 0);
+        assertTrue("Test1: Wrong length", bs0.length() == 0);
+
+        bs0.flip(0);
+        assertTrue("Test2: Wrong size", bs0.size() == 64);
+        assertTrue("Test2: Wrong length", bs0.length() == 1);
+
+        bs0.flip(63);
+        assertTrue("Test3: Wrong size", bs0.size() == 64);
+        assertTrue("Test3: Wrong length", bs0.length() == 64);
+
+        eightbs.flip(7);
+        assertTrue("Failed to flip bit 7", !eightbs.get(7));
+
+        // Check to see all other bits are still set
+        for (int i = 0; i < 7; i++)
+            assertTrue("Flip flipped incorrect bits", eightbs.get(i));
+
+        eightbs.flip(127);
+        assertTrue("Failed to flip bit 127", eightbs.get(127));
+
+        eightbs.flip(127);
+        assertTrue("Failed to flip bit 127", !eightbs.get(127));
+    }
+
+    /**
+     * @tests java.util.BitSet#clear(int, int)
+     */
+    public void test_flipII() {
+        BitSet bitset = new BitSet();
+        for (int i = 0; i < 20; i++) {
+            bitset.set(i);
+        }
+        bitset.flip(10, 10);
+               
+        // Test for method void java.util.BitSet.flip(int, int)
+        // pos1 and pos2 are in the same bitset element
+        BitSet bs = new BitSet(16);
+        bs.set(7);
+        bs.set(10);
+        bs.flip(7, 11);
+        for (int i = 0; i < 7; i++) {
+            assertTrue("Shouldn't have flipped bit " + i, !bs.get(i));
+        }
+        assertFalse("Failed to flip bit 7", bs.get(7));
+        assertTrue("Failed to flip bit 8", bs.get(8));
+        assertTrue("Failed to flip bit 9", bs.get(9));
+        assertFalse("Failed to flip bit 10", bs.get(10));
+        for (int i = 11; i < bs.size(); i++) {
+            assertTrue("Shouldn't have flipped bit " + i, !bs.get(i));
+        }
+
+        // pos1 and pos2 is in the same bitset element, boundry testing
+        bs = new BitSet(16);
+        bs.set(7);
+        bs.set(10);
+        bs.flip(7, 64);
+        assertTrue("Failed to grow BitSet", bs.size() == 64);
+        for (int i = 0; i < 7; i++) {
+            assertTrue("Shouldn't have flipped bit " + i, !bs.get(i));
+        }
+        assertFalse("Failed to flip bit 7", bs.get(7));
+        assertTrue("Failed to flip bit 8", bs.get(8));
+        assertTrue("Failed to flip bit 9", bs.get(9));
+        assertFalse("Failed to flip bit 10", bs.get(10));
+        for (int i = 11; i < 64; i++) {
+            assertTrue("failed to flip bit " + i, bs.get(i));
+        }
+        assertFalse("Shouldn't have flipped bit 64", bs.get(64));
+
+        // more boundary testing
+        bs = new BitSet(32);
+        bs.flip(0, 64);
+        for (int i = 0; i < 64; i++) {
+            assertTrue("Failed to flip bit " + i, bs.get(i));
+        }
+        assertFalse("Shouldn't have flipped bit 64", bs.get(64));
+
+        bs = new BitSet(32);
+        bs.flip(0, 65);
+        for (int i = 0; i < 65; i++) {
+            assertTrue("Failed to flip bit " + i, bs.get(i));
+        }
+        assertFalse("Shouldn't have flipped bit 65", bs.get(65));
+
+        // pos1 and pos2 are in two sequential bitset elements
+        bs = new BitSet(128);
+        bs.set(7);
+        bs.set(10);
+        bs.set(72);
+        bs.set(110);
+        bs.flip(9, 74);
+        for (int i = 0; i < 7; i++) {
+            assertFalse("Shouldn't have flipped bit " + i, bs.get(i));
+        }
+        assertTrue("Shouldn't have flipped bit 7", bs.get(7));
+        assertFalse("Shouldn't have flipped bit 8", bs.get(8));
+        assertTrue("Failed to flip bit 9", bs.get(9));
+        assertFalse("Failed to flip bit 10", bs.get(10));
+        for (int i = 11; i < 72; i++) {
+            assertTrue("failed to flip bit " + i, bs.get(i));
+        }
+        assertFalse("Failed to flip bit 72", bs.get(72));
+        assertTrue("Failed to flip bit 73", bs.get(73));
+        for (int i = 74; i < 110; i++) {
+            assertFalse("Shouldn't have flipped bit " + i, bs.get(i));
+        }
+        assertTrue("Shouldn't have flipped bit 110", bs.get(110));
+        for (int i = 111; i < bs.size(); i++) {
+            assertFalse("Shouldn't have flipped bit " + i, bs.get(i));
+        }
+
+        // pos1 and pos2 are in two non-sequential bitset elements
+        bs = new BitSet(256);
+        bs.set(7);
+        bs.set(10);
+        bs.set(72);
+        bs.set(110);
+        bs.set(181);
+        bs.set(220);
+        bs.flip(9, 219);
+        for (int i = 0; i < 7; i++) {
+            assertFalse("Shouldn't have flipped bit " + i, bs.get(i));
+        }
+        assertTrue("Shouldn't have flipped bit 7", bs.get(7));
+        assertFalse("Shouldn't have flipped bit 8", bs.get(8));
+        assertTrue("Failed to flip bit 9", bs.get(9));
+        assertFalse("Failed to flip bit 10", bs.get(10));
+        for (int i = 11; i < 72; i++) {
+            assertTrue("failed to flip bit " + i, bs.get(i));
+        }
+        assertFalse("Failed to flip bit 72", bs.get(72));
+        for (int i = 73; i < 110; i++) {
+            assertTrue("failed to flip bit " + i, bs.get(i));
+        }
+        assertFalse("Failed to flip bit 110", bs.get(110));
+        for (int i = 111; i < 181; i++) {
+            assertTrue("failed to flip bit " + i, bs.get(i));
+        }
+        assertFalse("Failed to flip bit 181", bs.get(181));
+        for (int i = 182; i < 219; i++) {
+            assertTrue("failed to flip bit " + i, bs.get(i));
+        }
+        assertFalse("Shouldn't have flipped bit 219", bs.get(219));
+        assertTrue("Shouldn't have flipped bit 220", bs.get(220));
+        for (int i = 221; i < bs.size(); i++) {
+            assertTrue("Shouldn't have flipped bit " + i, !bs.get(i));
+        }
+
+        // test illegal args
+        bs = new BitSet(10);
+        try {
+            bs.flip(-1, 3);
+            fail("Test1: Attempt to flip with  negative index failed to generate exception");
+        } catch (IndexOutOfBoundsException e) {
+            // correct behavior
+        }
+
+        try {
+            bs.flip(2, -1);
+            fail("Test2: Attempt to flip with negative index failed to generate exception");
+        } catch (IndexOutOfBoundsException e) {
+            // correct behavior
+        }
+
+        try {
+            bs.flip(4, 2);
+            fail("Test4: Attempt to flip with illegal args failed to generate exception");
+        } catch (IndexOutOfBoundsException e) {
+            // correct behavior
+        }
+    }
+
+    /**
+     * @tests java.util.BitSet#set(int)
+     */
+    public void test_setI() {
+        // Test for method void java.util.BitSet.set(int)
+
+        BitSet bs = new BitSet();
+        bs.set(8);
+        assertTrue("Failed to set bit", bs.get(8));
+
+        try {
+            bs.set(-1);
+            fail("Attempt to set at negative index failed to generate exception");
+        } catch (IndexOutOfBoundsException e) {
+            // Correct behaviour
+        }
+
+        // Try setting a bit on a 64 boundary
+        bs.set(128);
+        assertTrue("Failed to grow BitSet", bs.size() == 192);
+        assertTrue("Failed to set bit", bs.get(128));
+
+        bs = new BitSet(64);
+        for (int i = bs.size(); --i >= 0;) {
+            bs.set(i);
+            assertTrue("Incorrectly set", bs.get(i));
+            assertTrue("Incorrect length", bs.length() == (i + 1));
+            for (int j = bs.size(); --j > i;)
+                assertFalse("Incorrectly set bit " + j, bs.get(j));
+            for (int j = i; --j >= 0;)
+                assertFalse("Incorrectly set bit " + j, bs.get(j));
+            bs.clear(i);
+        }
+
+        bs = new BitSet(0);
+        assertTrue("Test1: Wrong length, " + bs.size(), bs.length() == 0);
+        bs.set(0);
+        assertTrue("Test2: Wrong length" + bs.size(), bs.length() == 1);
+    }
+
+    /**
+     * @tests java.util.BitSet#set(int, boolean)
+     */
+    public void test_setIZ() {
+        // Test for method void java.util.BitSet.set(int, boolean)
+        eightbs.set(5, false);
+        assertFalse("Should have set bit 5 to true", eightbs.get(5));
+
+        eightbs.set(5, true);
+        assertTrue("Should have set bit 5 to false", eightbs.get(5));
+    }
+
+    /**
+     * @tests java.util.BitSet#set(int, int)
+     */
+    public void test_setII() {
+        BitSet bitset = new BitSet(30);
+        bitset.set(29, 29);
+        
+        // Test for method void java.util.BitSet.set(int, int)
+        // pos1 and pos2 are in the same bitset element
+        BitSet bs = new BitSet(16);
+        bs.set(5);
+        bs.set(15);
+        bs.set(7, 11);
+        for (int i = 0; i < 7; i++) {
+            if (i == 5)
+                assertTrue("Shouldn't have flipped bit " + i, bs.get(i));
+            else
+                assertFalse("Shouldn't have set bit " + i, bs.get(i));
+        }
+        for (int i = 7; i < 11; i++)
+            assertTrue("Failed to set bit " + i, bs.get(i));
+        for (int i = 11; i < bs.size(); i++) {
+            if (i == 15)
+                assertTrue("Shouldn't have flipped bit " + i, bs.get(i));
+            else
+                assertFalse("Shouldn't have set bit " + i, bs.get(i));
+        }
+
+        // pos1 and pos2 is in the same bitset element, boundry testing
+        bs = new BitSet(16);
+        bs.set(7, 64);
+        assertTrue("Failed to grow BitSet", bs.size() == 64);
+        for (int i = 0; i < 7; i++) {
+            assertFalse("Shouldn't have set bit " + i, bs.get(i));
+        }
+        for (int i = 7; i < 64; i++) {
+            assertTrue("Failed to set bit " + i, bs.get(i));
+        }
+        assertFalse("Shouldn't have set bit 64", bs.get(64));
+
+        // more boundary testing
+        bs = new BitSet(32);
+        bs.set(0, 64);
+        for (int i = 0; i < 64; i++) {
+            assertTrue("Failed to set bit " + i, bs.get(i));
+        }
+        assertFalse("Shouldn't have set bit 64", bs.get(64));
+
+        bs = new BitSet(32);
+        bs.set(0, 65);
+        for (int i = 0; i < 65; i++) {
+            assertTrue("Failed to set bit " + i, bs.get(i));
+        }
+        assertFalse("Shouldn't have set bit 65", bs.get(65));
+
+        // pos1 and pos2 are in two sequential bitset elements
+        bs = new BitSet(128);
+        bs.set(7);
+        bs.set(110);
+        bs.set(9, 74);
+        for (int i = 0; i < 9; i++) {
+            if (i == 7)
+                assertTrue("Shouldn't have flipped bit " + i, bs.get(i));
+            else
+                assertFalse("Shouldn't have set bit " + i, bs.get(i));
+        }
+        for (int i = 9; i < 74; i++) {
+            assertTrue("Failed to set bit " + i, bs.get(i));
+        }
+        for (int i = 74; i < bs.size(); i++) {
+            if (i == 110)
+                assertTrue("Shouldn't have flipped bit " + i, bs.get(i));
+            else
+                assertFalse("Shouldn't have set bit " + i, bs.get(i));
+        }
+
+        // pos1 and pos2 are in two non-sequential bitset elements
+        bs = new BitSet(256);
+        bs.set(7);
+        bs.set(255);
+        bs.set(9, 219);
+        for (int i = 0; i < 9; i++) {
+            if (i == 7)
+                assertTrue("Shouldn't have set flipped " + i, bs.get(i));
+            else
+                assertFalse("Shouldn't have set bit " + i, bs.get(i));
+        }
+
+        for (int i = 9; i < 219; i++) {
+            assertTrue("failed to set bit " + i, bs.get(i));
+        }
+
+        for (int i = 219; i < 255; i++) {
+            assertFalse("Shouldn't have set bit " + i, bs.get(i));
+        }
+
+        assertTrue("Shouldn't have flipped bit 255", bs.get(255));
+
+        // test illegal args
+        bs = new BitSet(10);
+        try {
+            bs.set(-1, 3);
+            fail("Test1: Attempt to flip with  negative index failed to generate exception");
+        } catch (IndexOutOfBoundsException e) {
+            // Correct behavior
+        }
+
+        try {
+            bs.set(2, -1);
+            fail("Test2: Attempt to flip with negative index failed to generate exception");
+        } catch (IndexOutOfBoundsException e) {
+            // Correct behavior
+        }
+
+        try {
+            bs.set(2, 2);
+            assertFalse("Bit got set incorrectly ", bs.get(2));
+        } catch (IndexOutOfBoundsException e) {
+            fail("Unexpected IndexOutOfBoundsException: " + e);
+        }
+
+        try {
+            bs.set(4, 2);
+            fail("Test4: Attempt to flip with illegal args failed to generate exception");
+        } catch (IndexOutOfBoundsException e) {
+            // Correct behavior
+        }
+    }
+
+    /**
+     * @tests java.util.BitSet#set(int, int, boolean)
+     */
+    public void test_setIIZ() {
+        // Test for method void java.util.BitSet.set(int, int, boolean)
+        eightbs.set(3, 6, false);
+        assertTrue("Should have set bits 3, 4, and 5 to false", !eightbs.get(3)
+                && !eightbs.get(4) && !eightbs.get(5));
+
+        eightbs.set(3, 6, true);
+        assertTrue("Should have set bits 3, 4, and 5 to true", eightbs.get(3)
+                && eightbs.get(4) && eightbs.get(5));
+
+    }
+
+    /**
+     * @tests java.util.BitSet#intersects(java.util.BitSet)
+     */
+    public void test_intersectsLjava_util_BitSet() {
+        // Test for method boolean java.util.BitSet.intersects(java.util.BitSet)
+        BitSet bs = new BitSet(500);
+        bs.set(5);
+        bs.set(63);
+        bs.set(64);
+        bs.set(71, 110);
+        bs.set(127, 130);
+        bs.set(192);
+        bs.set(450);
+
+        BitSet bs2 = new BitSet(8);
+        assertFalse("Test1: intersects() returned incorrect value", bs
+                .intersects(bs2));
+        assertFalse("Test1: intersects() returned incorrect value", bs2
+                .intersects(bs));
+
+        bs2.set(4);
+        assertFalse("Test2: intersects() returned incorrect value", bs
+                .intersects(bs2));
+        assertFalse("Test2: intersects() returned incorrect value", bs2
+                .intersects(bs));
+
+        bs2.clear();
+        bs2.set(5);
+        assertTrue("Test3: intersects() returned incorrect value", bs
+                .intersects(bs2));
+        assertTrue("Test3: intersects() returned incorrect value", bs2
+                .intersects(bs));
+
+        bs2.clear();
+        bs2.set(63);
+        assertTrue("Test4: intersects() returned incorrect value", bs
+                .intersects(bs2));
+        assertTrue("Test4: intersects() returned incorrect value", bs2
+                .intersects(bs));
+
+        bs2.clear();
+        bs2.set(80);
+        assertTrue("Test5: intersects() returned incorrect value", bs
+                .intersects(bs2));
+        assertTrue("Test5: intersects() returned incorrect value", bs2
+                .intersects(bs));
+
+        bs2.clear();
+        bs2.set(127);
+        assertTrue("Test6: intersects() returned incorrect value", bs
+                .intersects(bs2));
+        assertTrue("Test6: intersects() returned incorrect value", bs2
+                .intersects(bs));
+
+        bs2.clear();
+        bs2.set(192);
+        assertTrue("Test7: intersects() returned incorrect value", bs
+                .intersects(bs2));
+        assertTrue("Test7: intersects() returned incorrect value", bs2
+                .intersects(bs));
+
+        bs2.clear();
+        bs2.set(450);
+        assertTrue("Test8: intersects() returned incorrect value", bs
+                .intersects(bs2));
+        assertTrue("Test8: intersects() returned incorrect value", bs2
+                .intersects(bs));
+
+        bs2.clear();
+        bs2.set(500);
+        assertFalse("Test9: intersects() returned incorrect value", bs
+                .intersects(bs2));
+        assertFalse("Test9: intersects() returned incorrect value", bs2
+                .intersects(bs));
+    }
+
+    /**
+     * @tests java.util.BitSet#and(java.util.BitSet)
+     */
+    public void test_andLjava_util_BitSet() {
+        // Test for method void java.util.BitSet.and(java.util.BitSet)
+        BitSet bs = new BitSet(128);
+        // Initialize the bottom half of the BitSet
+
+        for (int i = 64; i < 128; i++)
+            bs.set(i);
+        eightbs.and(bs);
+        assertFalse("AND failed to clear bits", eightbs.equals(bs));
+        eightbs.set(3);
+        bs.set(3);
+        eightbs.and(bs);
+        assertTrue("AND failed to maintain set bits", bs.get(3));
+        bs.and(eightbs);
+        for (int i = 64; i < 128; i++) {
+            assertFalse("Failed to clear extra bits in the receiver BitSet", bs
+                    .get(i));
+        }
+    }
+
+    /**
+     * @tests java.util.BitSet#andNot(java.util.BitSet)
+     */
+    public void test_andNotLjava_util_BitSet() {
+        BitSet bs = (BitSet) eightbs.clone();
+        bs.clear(5);
+        BitSet bs2 = new BitSet();
+        bs2.set(2);
+        bs2.set(3);
+        bs.andNot(bs2);
+        assertTrue("Incorrect bitset after andNot", bs.toString().equals(
+                "{0, 1, 4, 6, 7}"));
+
+        bs = new BitSet(0);
+        bs.andNot(bs2);
+        assertTrue("Incorrect size", bs.size() == 0);
+    }
+
+    /**
+     * @tests java.util.BitSet#or(java.util.BitSet)
+     */
+    public void test_orLjava_util_BitSet() {
+        // Test for method void java.util.BitSet.or(java.util.BitSet)
+        BitSet bs = new BitSet(128);
+        bs.or(eightbs);
+        for (int i = 0; i < 8; i++) {
+            assertTrue("OR failed to set bits", bs.get(i));
+        }
+
+        bs = new BitSet(0);
+        bs.or(eightbs);
+        for (int i = 0; i < 8; i++) {
+            assertTrue("OR(0) failed to set bits", bs.get(i));
+        }
+
+        eightbs.clear(5);
+        bs = new BitSet(128);
+        bs.or(eightbs);
+        assertFalse("OR set a bit which should be off", bs.get(5));
+    }
+
+    /**
+     * @tests java.util.BitSet#xor(java.util.BitSet)
+     */
+    public void test_xorLjava_util_BitSet() {
+        // Test for method void java.util.BitSet.xor(java.util.BitSet)
+
+        BitSet bs = (BitSet) eightbs.clone();
+        bs.xor(eightbs);
+        for (int i = 0; i < 8; i++) {
+            assertFalse("XOR failed to clear bits", bs.get(i));
+        }
+
+        bs.xor(eightbs);
+        for (int i = 0; i < 8; i++) {
+            assertTrue("XOR failed to set bits", bs.get(i));
+        }
+
+        bs = new BitSet(0);
+        bs.xor(eightbs);
+        for (int i = 0; i < 8; i++) {
+            assertTrue("XOR(0) failed to set bits", bs.get(i));
+        }
+
+        bs = new BitSet();
+        bs.set(63);
+        assertEquals("Test highest bit", "{63}", bs.toString());
+    }
+
+    /**
+     * @tests java.util.BitSet#size()
+     */
+    public void test_size() {
+        // Test for method int java.util.BitSet.size()
+        assertTrue("Returned incorrect size", eightbs.size() == 64);
+        eightbs.set(129);
+        assertTrue("Returned incorrect size", eightbs.size() >= 129);
+
+    }
+
+    /**
+     * @tests java.util.BitSet#toString()
+     */
+    public void test_toString() {
+        // Test for method java.lang.String java.util.BitSet.toString()
+        assertTrue("Returned incorrect string representation", eightbs
+                .toString().equals("{0, 1, 2, 3, 4, 5, 6, 7}"));
+        eightbs.clear(2);
+        assertTrue("Returned incorrect string representation", eightbs
+                .toString().equals("{0, 1, 3, 4, 5, 6, 7}"));
+    }
+
+    /**
+     * @tests java.util.BitSet#length()
+     */
+    public void test_length() {
+        BitSet bs = new BitSet();
+        assertTrue("BitSet returned wrong length--wanted 0, got: "
+                + bs.length(), bs.length() == 0);
+        bs.set(5);
+        assertTrue("BitSet returned wrong length--wanted 6, got: "
+                + bs.length(), bs.length() == 6);
+        bs.set(10);
+        assertTrue("BitSet returned wrong length--wanted 11, got: "
+                + bs.length(), bs.length() == 11);
+        bs.set(432);
+        assertTrue("BitSet returned wrong length--wanted 433, got: "
+                + bs.length(), bs.length() == 433);
+        bs.set(300);
+        assertTrue("BitSet returned wrong length--wanted 433 (again), got: "
+                + bs.length(), bs.length() == 433);
+    }
+
+    /**
+     * @tests java.util.BitSet#nextSetBit(int)
+     */
+    public void test_nextSetBitI() {
+        // Test for method int java.util.BitSet.nextSetBit()
+        BitSet bs = new BitSet(500);
+        bs.set(5);
+        bs.set(32);
+        bs.set(63);
+        bs.set(64);
+        bs.set(71, 110);
+        bs.set(127, 130);
+        bs.set(193);
+        bs.set(450);
+        try {
+            bs.nextSetBit(-1);
+            fail("Expected IndexOutOfBoundsException for negative index");
+        } catch (IndexOutOfBoundsException e) {
+            // correct behavior
+        }
+        assertEquals("nextSetBit() returned the wrong value", 5, bs
+                .nextSetBit(0));
+        assertEquals("nextSetBit() returned the wrong value", 5, bs
+                .nextSetBit(5));
+        assertEquals("nextSetBit() returned the wrong value", 32, bs
+                .nextSetBit(6));
+        assertEquals("nextSetBit() returned the wrong value", 32, bs
+                .nextSetBit(32));
+        assertEquals("nextSetBit() returned the wrong value", 63, bs
+                .nextSetBit(33));
+
+        // boundary tests
+        assertEquals("nextSetBit() returned the wrong value", 63, bs
+                .nextSetBit(63));
+        assertEquals("nextSetBit() returned the wrong value", 64, bs
+                .nextSetBit(64));
+
+        // at bitset element 1
+        assertEquals("nextSetBit() returned the wrong value", 71, bs
+                .nextSetBit(65));
+        assertEquals("nextSetBit() returned the wrong value", 71, bs
+                .nextSetBit(71));
+        assertEquals("nextSetBit() returned the wrong value", 72, bs
+                .nextSetBit(72));
+        assertEquals("nextSetBit() returned the wrong value", 127, bs
+                .nextSetBit(110));
+
+        // boundary tests
+        assertEquals("nextSetBit() returned the wrong value", 127, bs
+                .nextSetBit(127));
+        assertEquals("nextSetBit() returned the wrong value", 128, bs
+                .nextSetBit(128));
+
+        // at bitset element 2
+        assertEquals("nextSetBit() returned the wrong value", 193, bs
+                .nextSetBit(130));
+
+        assertEquals("nextSetBit() returned the wrong value", 193, bs
+                .nextSetBit(191));
+        assertEquals("nextSetBit() returned the wrong value", 193, bs
+                .nextSetBit(192));
+        assertEquals("nextSetBit() returned the wrong value", 193, bs
+                .nextSetBit(193));
+        assertEquals("nextSetBit() returned the wrong value", 450, bs
+                .nextSetBit(194));
+        assertEquals("nextSetBit() returned the wrong value", 450, bs
+                .nextSetBit(255));
+        assertEquals("nextSetBit() returned the wrong value", 450, bs
+                .nextSetBit(256));
+        assertEquals("nextSetBit() returned the wrong value", 450, bs
+                .nextSetBit(450));
+
+        assertEquals("nextSetBit() returned the wrong value", -1, bs
+                .nextSetBit(451));
+        assertEquals("nextSetBit() returned the wrong value", -1, bs
+                .nextSetBit(511));
+        assertEquals("nextSetBit() returned the wrong value", -1, bs
+                .nextSetBit(512));
+        assertEquals("nextSetBit() returned the wrong value", -1, bs
+                .nextSetBit(800));
+    }
+
+    /**
+     * @tests java.util.BitSet#nextClearBit(int)
+     */
+    public void test_nextClearBitI() {
+        // Test for method int java.util.BitSet.nextSetBit()
+        BitSet bs = new BitSet(500);
+        bs.set(0, bs.size() - 1); // ensure all the bits from 0 to bs.size()
+                                    // -1
+        bs.set(bs.size() - 1); // are set to true
+        bs.clear(5);
+        bs.clear(32);
+        bs.clear(63);
+        bs.clear(64);
+        bs.clear(71, 110);
+        bs.clear(127, 130);
+        bs.clear(193);
+        bs.clear(450);
+        try {
+            bs.nextClearBit(-1);
+            fail("Expected IndexOutOfBoundsException for negative index");
+        } catch (IndexOutOfBoundsException e) {
+            // correct behavior
+        }
+        assertEquals("nextClearBit() returned the wrong value", 5, bs
+                .nextClearBit(0));
+        assertEquals("nextClearBit() returned the wrong value", 5, bs
+                .nextClearBit(5));
+        assertEquals("nextClearBit() returned the wrong value", 32, bs
+                .nextClearBit(6));
+        assertEquals("nextClearBit() returned the wrong value", 32, bs
+                .nextClearBit(32));
+        assertEquals("nextClearBit() returned the wrong value", 63, bs
+                .nextClearBit(33));
+
+        // boundary tests
+        assertEquals("nextClearBit() returned the wrong value", 63, bs
+                .nextClearBit(63));
+        assertEquals("nextClearBit() returned the wrong value", 64, bs
+                .nextClearBit(64));
+
+        // at bitset element 1
+        assertEquals("nextClearBit() returned the wrong value", 71, bs
+                .nextClearBit(65));
+        assertEquals("nextClearBit() returned the wrong value", 71, bs
+                .nextClearBit(71));
+        assertEquals("nextClearBit() returned the wrong value", 72, bs
+                .nextClearBit(72));
+        assertEquals("nextClearBit() returned the wrong value", 127, bs
+                .nextClearBit(110));
+
+        // boundary tests
+        assertEquals("nextClearBit() returned the wrong value", 127, bs
+                .nextClearBit(127));
+        assertEquals("nextClearBit() returned the wrong value", 128, bs
+                .nextClearBit(128));
+
+        // at bitset element 2
+        assertEquals("nextClearBit() returned the wrong value", 193, bs
+                .nextClearBit(130));
+        assertEquals("nextClearBit() returned the wrong value", 193, bs
+                .nextClearBit(191));
+
+        assertEquals("nextClearBit() returned the wrong value", 193, bs
+                .nextClearBit(192));
+        assertEquals("nextClearBit() returned the wrong value", 193, bs
+                .nextClearBit(193));
+        assertEquals("nextClearBit() returned the wrong value", 450, bs
+                .nextClearBit(194));
+        assertEquals("nextClearBit() returned the wrong value", 450, bs
+                .nextClearBit(255));
+        assertEquals("nextClearBit() returned the wrong value", 450, bs
+                .nextClearBit(256));
+        assertEquals("nextClearBit() returned the wrong value", 450, bs
+                .nextClearBit(450));
+
+        // bitset has 1 still the end of bs.size() -1, but calling nextClearBit
+        // with any index value
+        // after the last true bit should return bs.size(),
+        assertEquals("nextClearBit() returned the wrong value", 512, bs
+                .nextClearBit(451));
+        assertEquals("nextClearBit() returned the wrong value", 512, bs
+                .nextClearBit(511));
+        assertEquals("nextClearBit() returned the wrong value", 512, bs
+                .nextClearBit(512));
+
+        // if the index is larger than bs.size(), nextClearBit should return
+        // index;
+        assertEquals("nextClearBit() returned the wrong value", 513, bs
+                .nextClearBit(513));
+        assertEquals("nextClearBit() returned the wrong value", 800, bs
+                .nextClearBit(800));
+    }
+
+    /**
+     * @tests java.util.BitSet#isEmpty()
+     */
+    public void test_isEmpty() {
+        BitSet bs = new BitSet(500);
+        assertTrue("Test: isEmpty() returned wrong value", bs.isEmpty());
+
+        // at bitset element 0
+        bs.set(3);
+        assertFalse("Test0: isEmpty() returned wrong value", bs.isEmpty());
+
+        // at bitset element 1
+        bs.clear();
+        bs.set(12);
+        assertFalse("Test1: isEmpty() returned wrong value", bs.isEmpty());
+
+        // at bitset element 2
+        bs.clear();
+        bs.set(128);
+        assertFalse("Test2: isEmpty() returned wrong value", bs.isEmpty());
+
+        // boundary testing
+        bs.clear();
+        bs.set(459);
+        assertFalse("Test3: isEmpty() returned wrong value", bs.isEmpty());
+
+        bs.clear();
+        bs.set(511);
+        assertFalse("Test4: isEmpty() returned wrong value", bs.isEmpty());
+    }
+
+    /**
+     * @tests java.util.BitSet#cardinality()
+     */
+    public void test_cardinality() {
+        // test for method int java.util.BitSet.cardinality()
+        BitSet bs = new BitSet(500);
+        bs.set(5);
+        bs.set(32);
+        bs.set(63);
+        bs.set(64);
+        bs.set(71, 110);
+        bs.set(127, 130);
+        bs.set(193);
+        bs.set(450);
+        assertEquals("cardinality() returned wrong value", 48, bs.cardinality());
+
+        bs.flip(0, 500);
+        assertEquals("cardinality() returned wrong value", 452, bs
+                .cardinality());
+
+        bs.clear();
+        assertEquals("cardinality() returned wrong value", 0, bs.cardinality());
+
+        bs.set(0, 500);
+        assertEquals("cardinality() returned wrong value", 500, bs
+                .cardinality());
+    }
+
+    protected void setUp() {
+
+        eightbs = new BitSet();
+
+        for (int i = 0; i < 8; i++)
+            eightbs.set(i);
+    }
+
+    protected void tearDown() {
+    }
+
 }



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