+/*
+ * Copyright 2005 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.wamblee.concurrency;
+
+import org.wamblee.test.EventTracker;
+import org.wamblee.test.TimingUtils;
+
+import junit.framework.TestCase;
+
+/**
+ * Tests for the JVMLock.
+ */
+public abstract class AbstractLockTestCase extends TestCase {
+
+ protected static final int SLEEP_TIME = 1000;
+
+ protected static final String STARTED = "started";
+
+ protected static final String ACQUIRED = "acquired";
+
+ protected static final String RELEASED = "released";
+
+ private EventTracker<String> _tracker;
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see junit.framework.TestCase#setUp()
+ */
+ @Override
+ protected void setUp() throws Exception {
+ _tracker = new EventTracker<String>();
+ }
+
+ protected EventTracker<String> getTracker() {
+ return _tracker;
+ }
+
+ /**
+ * Must be implemented to generate the events
+ * {@link #STARTED}, {@link #ACQUIRED}, and {@link #RELEASED} in
+ * that order. The lock should be acquired for
+ * the time specified by {@link #SLEEP_TIME}.
+ * @return Thread which does the work.
+ */
+ protected abstract Thread runThread();
+
+ /**
+ * Tests the operation of the lock.
+ */
+ public void testLock() throws InterruptedException {
+ Thread t1 = runThread();
+ Thread t2 = runThread();
+ TimingUtils.sleep(SLEEP_TIME / 10); // give threads a chance to start
+ // up.
+ assertEquals(2, _tracker.getEventCount(STARTED)); // both threads
+ // should have
+ // started.
+ assertEquals(1, _tracker.getEventCount(ACQUIRED)); // one thread has
+ // acquired the
+ // lock.
+ TimingUtils.sleep(SLEEP_TIME);
+ assertEquals(2, _tracker.getEventCount(ACQUIRED)); // now the other
+ // thread could also
+ // acquire the lock
+ assertEquals(1, _tracker.getEventCount(RELEASED)); // and the first
+ // thread has
+ // released it.
+ TimingUtils.sleep(SLEEP_TIME);
+ assertEquals(2, _tracker.getEventCount(RELEASED)); // both threads
+ // should be
+ // finished.
+ t1.join();
+ t2.join();
+ }
+}