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/* |
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* Written by members of JCP JSR-166 Expert Group and released to the |
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* public domain. Use, modify, and redistribute this code in any way |
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* without acknowledgement. Other contributors include Andrew Wright, |
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* Jeffrey Hayes, Pat Fischer, Mike Judd. |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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*/ |
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import junit.framework.*; |
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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public class ThreadTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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junit.textui.TestRunner.run(suite()); |
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main(suite(), args); |
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} |
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public static Test suite() { |
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return new TestSuite(ThreadTest.class); |
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return new TestSuite(ThreadTest.class); |
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} |
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static class MyHandler implements Thread.UncaughtExceptionHandler { |
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e.printStackTrace(); |
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} |
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} |
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/** |
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* getUncaughtExceptionHandler returns ThreadGroup unless set, |
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* otherwise returning value of last setUncaughtExceptionHandler. |
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*/ |
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public void testGetAndSetUncaughtExceptionHandler() { |
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// these must be done all at once to avoid state |
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// dependencies across tests |
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Thread current = Thread.currentThread(); |
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ThreadGroup tg = current.getThreadGroup(); |
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MyHandler eh = new MyHandler(); |
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assertEquals(tg, current.getUncaughtExceptionHandler()); |
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assertSame(tg, current.getUncaughtExceptionHandler()); |
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current.setUncaughtExceptionHandler(eh); |
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assertEquals(eh, current.getUncaughtExceptionHandler()); |
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current.setUncaughtExceptionHandler(null); |
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assertEquals(tg, current.getUncaughtExceptionHandler()); |
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try { |
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assertSame(eh, current.getUncaughtExceptionHandler()); |
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} finally { |
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current.setUncaughtExceptionHandler(null); |
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} |
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assertSame(tg, current.getUncaughtExceptionHandler()); |
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} |
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/** |
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* getDefaultUncaughtExceptionHandler returns value of last |
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* setDefaultUncaughtExceptionHandler. |
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*/ |
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@SuppressWarnings("removal") |
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public void testGetAndSetDefaultUncaughtExceptionHandler() { |
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assertNull(Thread.getDefaultUncaughtExceptionHandler()); |
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// failure due to SecurityException is OK. |
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// Would be nice to explicitly test both ways, but cannot yet. |
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Thread.UncaughtExceptionHandler defaultHandler |
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= Thread.getDefaultUncaughtExceptionHandler(); |
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MyHandler eh = new MyHandler(); |
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try { |
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Thread.setDefaultUncaughtExceptionHandler(eh); |
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try { |
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assertSame(eh, Thread.getDefaultUncaughtExceptionHandler()); |
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} finally { |
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Thread.setDefaultUncaughtExceptionHandler(defaultHandler); |
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} |
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} catch (SecurityException ok) { |
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assertNotNull(System.getSecurityManager()); |
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} |
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assertSame(defaultHandler, Thread.getDefaultUncaughtExceptionHandler()); |
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} |
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// How to test actually using UEH within junit? |
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} |
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– |
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