test/tck/ThreadTest.java

/*
 * 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.
 */

import junit.framework.*;

public class ThreadTest extends JSR166TestCase {
    public static void main(String[] args) {
        junit.textui.TestRunner.run(suite());   
    }
    
    public static Test suite() {
        return new TestSuite(ThreadTest.class);
    }

    static class MyHandler implements Thread.UncaughtExceptionHandler {
        public void uncaughtException(Thread t, Throwable e) {
            e.printStackTrace();
        }
    }
    
    /**
     * getUncaughtExceptionHandler returns ThreadGroup unless set,
     * otherwise returning vlaue of last setUncaughtExceptionHandler.
     */
    public void testGetAndSetUncaughtExceptionHandler() {
        // these must be done all at once to avoid state
        // dependencies across tests
        Thread current = Thread.currentThread();
        ThreadGroup tg = current.getThreadGroup();
        MyHandler eh = new MyHandler();
        assertEquals(tg, current.getUncaughtExceptionHandler());
        current.setUncaughtExceptionHandler(eh);
        assertEquals(eh, current.getUncaughtExceptionHandler());
        current.setUncaughtExceptionHandler(null);
        assertEquals(tg, current.getUncaughtExceptionHandler());
    }

    /**
     * getDefaultUncaughtExceptionHandler returns value of last
     * setDefaultUncaughtExceptionHandler. 
     */
    public void testGetAndSetDefaultUncaughtExceptionHandler() {
        assertEquals(null, Thread.getDefaultUncaughtExceptionHandler());
        // failure due to securityException is OK.
        // Would be nice to explicitly test both ways, but cannot yet.
        try {
            Thread current = Thread.currentThread();
            ThreadGroup tg = current.getThreadGroup();
            MyHandler eh = new MyHandler();
            Thread.setDefaultUncaughtExceptionHandler(eh);
            assertEquals(eh, Thread.getDefaultUncaughtExceptionHandler());
            Thread.setDefaultUncaughtExceptionHandler(null);
        }
        catch(SecurityException ok) {
        }
        assertEquals(null, Thread.getDefaultUncaughtExceptionHandler());
    }

    /**
     * getUncaughtExceptionHandler returns value of last
     * setDefaultUncaughtExceptionHandler if non-null
     */
    public void testGetAfterSetDefaultUncaughtExceptionHandler() {
        assertEquals(null, Thread.getDefaultUncaughtExceptionHandler());
        // failure due to securityException is OK.
        // Would be nice to explicitly test both ways, but cannot yet.
        try {
            Thread current = Thread.currentThread();
            ThreadGroup tg = current.getThreadGroup();
            MyHandler eh = new MyHandler();
            assertEquals(tg, current.getUncaughtExceptionHandler());
            Thread.setDefaultUncaughtExceptionHandler(eh);
            assertEquals(eh, current.getUncaughtExceptionHandler());
            Thread.setDefaultUncaughtExceptionHandler(null);
            assertEquals(tg, current.getUncaughtExceptionHandler());
        }
        catch(SecurityException ok) {
        }
        assertEquals(null, Thread.getDefaultUncaughtExceptionHandler());
    }
    
    // How to test actually using UEH within junit?

}

Revision:	1.6
Committed:	Sun Oct 5 23:00:40 2003 UTC (20 years, 7 months ago) by dl
Branch:	MAIN
Changes since 1.5:	+26 -2 lines
Log Message:	Added tests and documentation
#	User	Rev	Content
1	dl	1.1	/*
2			* Written by members of JCP JSR-166 Expert Group and released to the
3			* public domain. Use, modify, and redistribute this code in any way
4			* without acknowledgement. Other contributors include Andrew Wright,
5			* Jeffrey Hayes, Pat Fischer, Mike Judd.
6			*/
7
8			import junit.framework.*;
9
10	dl	1.3	public class ThreadTest extends JSR166TestCase {
11	dl	1.1	public static void main(String[] args) {
12			junit.textui.TestRunner.run(suite());
13			}
14
15			public static Test suite() {
16			return new TestSuite(ThreadTest.class);
17			}
18
19			static class MyHandler implements Thread.UncaughtExceptionHandler {
20			public void uncaughtException(Thread t, Throwable e) {
21			e.printStackTrace();
22			}
23			}
24
25	dl	1.5	/**
26	dl	1.6	* getUncaughtExceptionHandler returns ThreadGroup unless set,
27			* otherwise returning vlaue of last setUncaughtExceptionHandler.
28	dl	1.5	*/
29	dl	1.1	public void testGetAndSetUncaughtExceptionHandler() {
30			// these must be done all at once to avoid state
31			// dependencies across tests
32			Thread current = Thread.currentThread();
33			ThreadGroup tg = current.getThreadGroup();
34			MyHandler eh = new MyHandler();
35			assertEquals(tg, current.getUncaughtExceptionHandler());
36			current.setUncaughtExceptionHandler(eh);
37			assertEquals(eh, current.getUncaughtExceptionHandler());
38			current.setUncaughtExceptionHandler(null);
39			assertEquals(tg, current.getUncaughtExceptionHandler());
40			}
41	dl	1.4
42	dl	1.5	/**
43	dl	1.6	* getDefaultUncaughtExceptionHandler returns value of last
44			* setDefaultUncaughtExceptionHandler.
45	dl	1.5	*/
46	dl	1.4	public void testGetAndSetDefaultUncaughtExceptionHandler() {
47			assertEquals(null, Thread.getDefaultUncaughtExceptionHandler());
48			// failure due to securityException is OK.
49			// Would be nice to explicitly test both ways, but cannot yet.
50			try {
51			Thread current = Thread.currentThread();
52			ThreadGroup tg = current.getThreadGroup();
53			MyHandler eh = new MyHandler();
54	dl	1.6	Thread.setDefaultUncaughtExceptionHandler(eh);
55			assertEquals(eh, Thread.getDefaultUncaughtExceptionHandler());
56			Thread.setDefaultUncaughtExceptionHandler(null);
57			}
58			catch(SecurityException ok) {
59			}
60			assertEquals(null, Thread.getDefaultUncaughtExceptionHandler());
61			}
62
63			/**
64			* getUncaughtExceptionHandler returns value of last
65			* setDefaultUncaughtExceptionHandler if non-null
66			*/
67			public void testGetAfterSetDefaultUncaughtExceptionHandler() {
68			assertEquals(null, Thread.getDefaultUncaughtExceptionHandler());
69			// failure due to securityException is OK.
70			// Would be nice to explicitly test both ways, but cannot yet.
71			try {
72			Thread current = Thread.currentThread();
73			ThreadGroup tg = current.getThreadGroup();
74			MyHandler eh = new MyHandler();
75	dl	1.4	assertEquals(tg, current.getUncaughtExceptionHandler());
76			Thread.setDefaultUncaughtExceptionHandler(eh);
77	dl	1.6	assertEquals(eh, current.getUncaughtExceptionHandler());
78	dl	1.4	Thread.setDefaultUncaughtExceptionHandler(null);
79			assertEquals(tg, current.getUncaughtExceptionHandler());
80			}
81			catch(SecurityException ok) {
82			}
83			assertEquals(null, Thread.getDefaultUncaughtExceptionHandler());
84			}
85	dl	1.1
86			// How to test actually using UEH within junit?
87
88			}
89