X-Git-Url: http://wamblee.org/gitweb/?a=blobdiff_plain;f=support%2Fgeneral%2Fsrc%2Ftest%2Fjava%2Forg%2Fwamblee%2Fobserver%2FObservableTest.java;fp=support%2Fgeneral%2Fsrc%2Ftest%2Fjava%2Forg%2Fwamblee%2Fobserver%2FObservableTest.java;h=ff37ccb9bfeb1e72aea95826c5fcf473f86b5a4a;hb=32a62ca2c752e33a7873ac868a7a1f289caedcd4;hp=0000000000000000000000000000000000000000;hpb=d2bdf4e813c6a3964958c87b2ce56eaadf8a1f0a;p=utils

diff --git a/support/general/src/test/java/org/wamblee/observer/ObservableTest.java b/support/general/src/test/java/org/wamblee/observer/ObservableTest.java
new file mode 100644
index 00000000..ff37ccb9
--- /dev/null
+++ b/support/general/src/test/java/org/wamblee/observer/ObservableTest.java
@@ -0,0 +1,150 @@
+/*
+ * 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.observer;
+
+import static org.easymock.EasyMock.createControl;
+import static org.easymock.EasyMock.createMock;
+import static org.easymock.EasyMock.createStrictMock;
+import static org.easymock.EasyMock.replay;
+import static org.easymock.EasyMock.verify;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import junit.framework.TestCase;
+
+import org.easymock.IMocksControl;
+
+/**
+ * Test of the observer pattern implementation.
+ * 
+ * @author Erik Brakkee
+ */
+public class ObservableTest extends TestCase {
+
+	private static final int SUBSCRIBER_COUNT = 100;
+
+	private static final String UPDATE = "send";
+
+	private Integer _observed;
+	private Observable<Integer, String> _observable;
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see junit.framework.TestCase#setUp()
+	 */
+	@Override
+	protected void setUp() throws Exception {
+		super.setUp();
+		_observed = new Integer(1);
+		_observable = new Observable<Integer, String>(_observed,
+				new DefaultObserverNotifier());
+	}
+
+	/**
+	 * Tests subscription and notification of one subscriber.
+	 */
+	public void testOneObserver() {
+		final Observer mockObserver = createStrictMock(Observer.class);
+		long subscription = _observable.subscribe(mockObserver);
+
+		assertEquals(1, _observable.getObserverCount());
+
+		final String message = "hallo";
+		mockObserver.send(_observed, message);
+		replay(mockObserver);
+
+		_observable.send(message);
+		verify(mockObserver);
+
+		_observable.unsubscribe(subscription);
+		assertEquals(0, _observable.getObserverCount());
+
+		_observable.send(message);
+
+	}
+
+	/**
+	 * Subscribes many susbcribers and sends notifications to subscribers.
+	 * Verifies that unique subscription number are returned. Also verifies that
+	 * the correct subscribers are notfied.
+	 */
+	public void testManySubscribers() {
+		final int nsubscribers = SUBSCRIBER_COUNT;
+		final Observer[] mocks = new Observer[nsubscribers];
+
+		IMocksControl control = createControl();
+
+		List<Long> subscriptions = new ArrayList<Long>();
+		for (int i = 0; i < nsubscribers; i++) {
+			mocks[i] = control.createMock("mock" + i, Observer.class);
+			long subscription = _observable.subscribe(mocks[i]);
+			assertTrue(subscriptions.add(subscription));
+		}
+
+		assertEquals(nsubscribers, _observable.getObserverCount());
+
+		final String message = "hallo";
+
+		for (int i = 0; i < nsubscribers; i++) {
+			mocks[i].send(_observed, message);
+		}
+		control.replay();
+
+		_observable.send(message);
+		control.verify();
+
+		for (int i = nsubscribers / 2; i < nsubscribers; i++) {
+			_observable.unsubscribe(subscriptions.get(i));
+		}
+		assertEquals(nsubscribers - (nsubscribers - nsubscribers / 2),
+				_observable.getObserverCount());
+
+		control.reset();
+		final String message2 = "blabla";
+
+		for (int i = 0; i < nsubscribers / 2; i++) {
+			mocks[i].send(_observed, message2);
+		}
+		control.replay();
+
+		_observable.send(message2);
+		control.verify();
+	}
+
+	/**
+	 * Subscribes and then unsubscribes with a wrong id. Verifies that
+	 * IllegalArgumentException is thrown.
+	 * 
+	 */
+	public void testUnsubscribeWithWrongSubscription() {
+		Observer<Integer, String> observer = createMock(Observer.class);
+		replay(observer);
+		
+		long subscription = _observable.subscribe(observer);
+
+		assertEquals(1, _observable.getObserverCount());
+
+		try {
+			_observable.unsubscribe(subscription + 1);
+		} catch (IllegalArgumentException e) {
+			return; // ok
+		}
+		fail();
+	}
+}