--- jsr166/src/test/tck/AtomicBooleanTest.java	2003/09/25 11:02:41	1.5
+++ jsr166/src/test/tck/AtomicBooleanTest.java	2021/01/26 13:33:05	1.30
@@ -1,17 +1,19 @@
 /*
- * 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/publicdomain/zero/1.0/
+ * Other contributors include Andrew Wright, Jeffrey Hayes,
+ * Pat Fisher, Mike Judd.
  */
 
-import junit.framework.*;
-import java.util.concurrent.atomic.*;
-import java.io.*;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import junit.framework.Test;
+import junit.framework.TestSuite;
 
 public class AtomicBooleanTest extends JSR166TestCase {
-    public static void main (String[] args) {
-        junit.textui.TestRunner.run (suite());
+    public static void main(String[] args) {
+        main(suite(), args);
     }
     public static Test suite() {
         return new TestSuite(AtomicBooleanTest.class);
@@ -21,16 +23,16 @@ public class AtomicBooleanTest extends J
      * constructor initializes to given value
      */
     public void testConstructor() {
-        AtomicBoolean ai = new AtomicBoolean(true);
-	assertEquals(true,ai.get());
+        assertTrue(new AtomicBoolean(true).get());
+        assertFalse(new AtomicBoolean(false).get());
     }
 
     /**
-     * default constructed intializes to false
+     * default constructed initializes to false
      */
     public void testConstructor2() {
         AtomicBoolean ai = new AtomicBoolean();
-	assertEquals(false,ai.get());
+        assertFalse(ai.get());
     }
 
     /**
@@ -38,12 +40,23 @@ public class AtomicBooleanTest extends J
      */
     public void testGetSet() {
         AtomicBoolean ai = new AtomicBoolean(true);
-	assertEquals(true,ai.get());
-	ai.set(false);
-	assertEquals(false,ai.get());
-	ai.set(true);
-	assertEquals(true,ai.get());
-	
+        assertTrue(ai.get());
+        ai.set(false);
+        assertFalse(ai.get());
+        ai.set(true);
+        assertTrue(ai.get());
+    }
+
+    /**
+     * get returns the last value lazySet in same thread
+     */
+    public void testGetLazySet() {
+        AtomicBoolean ai = new AtomicBoolean(true);
+        assertTrue(ai.get());
+        ai.lazySet(false);
+        assertFalse(ai.get());
+        ai.lazySet(true);
+        assertTrue(ai.get());
     }
 
     /**
@@ -51,84 +64,83 @@ public class AtomicBooleanTest extends J
      */
     public void testCompareAndSet() {
         AtomicBoolean ai = new AtomicBoolean(true);
-	assertTrue(ai.compareAndSet(true,false));
-	assertEquals(false,ai.get());
-	assertTrue(ai.compareAndSet(false,false));
-	assertEquals(false,ai.get());
-	assertFalse(ai.compareAndSet(true,false));
-	assertFalse((ai.get()));
-	assertTrue(ai.compareAndSet(false,true));
-	assertEquals(true,ai.get());
+        assertTrue(ai.compareAndSet(true, false));
+        assertFalse(ai.get());
+        assertTrue(ai.compareAndSet(false, false));
+        assertFalse(ai.get());
+        assertFalse(ai.compareAndSet(true, false));
+        assertFalse(ai.get());
+        assertTrue(ai.compareAndSet(false, true));
+        assertTrue(ai.get());
     }
 
     /**
      * compareAndSet in one thread enables another waiting for value
      * to succeed
      */
-    public void testCompareAndSetInMultipleThreads() {
+    public void testCompareAndSetInMultipleThreads() throws Exception {
         final AtomicBoolean ai = new AtomicBoolean(true);
-        Thread t = new Thread(new Runnable() {
-                public void run() {
-                    while(!ai.compareAndSet(false, true)) Thread.yield();
-                }});
-        try {
-            t.start();
-            assertTrue(ai.compareAndSet(true, false));
-            t.join(LONG_DELAY_MS);
-            assertFalse(t.isAlive());
-        }
-        catch(Exception e) {
-            unexpectedException();
-        }
+        Thread t = new Thread(new CheckedRunnable() {
+            public void realRun() {
+                while (!ai.compareAndSet(false, true)) Thread.yield();
+            }});
+
+        t.start();
+        assertTrue(ai.compareAndSet(true, false));
+        t.join(LONG_DELAY_MS);
+        assertFalse(t.isAlive());
     }
 
     /**
      * repeated weakCompareAndSet succeeds in changing value when equal
-     * to expected 
+     * to expected
      */
+    @SuppressWarnings("deprecation")
     public void testWeakCompareAndSet() {
         AtomicBoolean ai = new AtomicBoolean(true);
-	while(!ai.weakCompareAndSet(true,false));
-	assertEquals(false,ai.get());
-	while(!ai.weakCompareAndSet(false,false));
-        assertEquals(false,ai.get());
-        while(!ai.weakCompareAndSet(false,true));
-	assertEquals(true,ai.get());
+        do {} while (!ai.weakCompareAndSet(true, false));
+        assertFalse(ai.get());
+        do {} while (!ai.weakCompareAndSet(false, false));
+        assertFalse(ai.get());
+        do {} while (!ai.weakCompareAndSet(false, true));
+        assertTrue(ai.get());
     }
 
     /**
      * getAndSet returns previous value and sets to given value
      */
     public void testGetAndSet() {
-        AtomicBoolean ai = new AtomicBoolean(true);
-	assertEquals(true,ai.getAndSet(false));
-	assertEquals(false,ai.getAndSet(false));
-	assertEquals(false,ai.getAndSet(true));
-	assertEquals(true,ai.get());
+        AtomicBoolean ai = new AtomicBoolean();
+        boolean[] booleans = { false, true };
+        for (boolean before : booleans)
+            for (boolean after : booleans) {
+                ai.set(before);
+                assertEquals(before, ai.getAndSet(after));
+                assertEquals(after, ai.get());
+            }
     }
 
     /**
-     * a deserialized serialized atomic holds same value
-     */
-    public void testSerialization() {
-        AtomicBoolean l = new AtomicBoolean();
-
-        try {
-            l.set(true);
-            ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
-            ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
-            out.writeObject(l);
-            out.close();
-
-            ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
-            ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
-            AtomicBoolean r = (AtomicBoolean) in.readObject();
-            assertEquals(l.get(), r.get());
-        } catch(Exception e){
-            e.printStackTrace();
-            unexpectedException();
-        }
+     * a deserialized/reserialized atomic holds same value
+     */
+    public void testSerialization() throws Exception {
+        AtomicBoolean x = new AtomicBoolean();
+        AtomicBoolean y = serialClone(x);
+        x.set(true);
+        AtomicBoolean z = serialClone(x);
+        assertTrue(x.get());
+        assertFalse(y.get());
+        assertTrue(z.get());
     }
 
+    /**
+     * toString returns current value.
+     */
+    public void testToString() {
+        AtomicBoolean ai = new AtomicBoolean();
+        assertEquals(Boolean.toString(false), ai.toString());
+        ai.set(true);
+        assertEquals(Boolean.toString(true), ai.toString());
+    }
 
 }