Migration to maven almost complete. At least everything builds and works

[utils] / support / src / test / java / org / wamblee / observer / ObservableTest.java

diff --git a/support/src/test/java/org/wamblee/observer/ObservableTest.java b/support/src/test/java/org/wamblee/observer/ObservableTest.java
new file mode 100644 (file)
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+++ b/support/src/test/java/org/wamblee/observer/ObservableTest.java
@@ -0,0 +1,137 @@
+/*
+ * 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 java.util.ArrayList;
+import java.util.List;
+
+import org.jmock.Mock;
+import org.jmock.cglib.MockObjectTestCase;
+
+/**
+ * Test of the observer pattern implementation.
+ */
+public class ObservableTest extends MockObjectTestCase {
+
+    private static final int SUBSCRIBER_COUNT = 100;
+
+    private static final String UPDATE = "send";
+
+    private Observable<ObservableTest, String> _observable;
+
+    /*
+     * (non-Javadoc)
+     * 
+     * @see junit.framework.TestCase#setUp()
+     */
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+
+        _observable = new Observable<ObservableTest, String>(this,
+                new DefaultObserverNotifier());
+    }
+
+    /**
+     * Tests subscription and notification of one subscriber.
+     */
+    public void testOneObserver() {
+        Mock mockObserver = mock(Observer.class);
+        Observer<ObservableTest, String> observer = (Observer<ObservableTest, String>) mockObserver
+                .proxy();
+        long subscription = _observable.subscribe(observer);
+
+        assertEquals(1, _observable.getObserverCount());
+
+        String message = "hallo";
+        mockObserver.expects(once()).method(UPDATE).with(same(this),
+                eq(message));
+
+        _observable.send(message);
+        _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() {
+        int nsubscribers = SUBSCRIBER_COUNT;
+        Mock[] mocks = new Mock[nsubscribers];
+
+        List<Long> subscriptions = new ArrayList<Long>();
+        for (int i = 0; i < nsubscribers; i++) {
+            Mock mockObserver = mock(Observer.class);
+            Observer<ObservableTest, String> observer = (Observer<ObservableTest, String>) mockObserver
+                    .proxy();
+            long subscription = _observable.subscribe(observer);
+
+            mocks[i] = mockObserver;
+            assertTrue(subscriptions.add(subscription));
+        }
+
+        assertEquals(nsubscribers, _observable.getObserverCount());
+
+        String message = "hallo";
+        for (int i = 0; i < nsubscribers; i++) {
+            mocks[i].expects(once()).method(UPDATE).with(same(this),
+                    eq(message));
+        }
+
+        _observable.send(message);
+
+        for (int i = nsubscribers / 2; i < nsubscribers; i++) {
+            _observable.unsubscribe(subscriptions.get(i));
+        }
+        assertEquals(nsubscribers - (nsubscribers - nsubscribers / 2),
+                _observable.getObserverCount());
+
+        message = "blabla";
+        for (int i = 0; i < nsubscribers / 2; i++) {
+            mocks[i].expects(once()).method(UPDATE).with(same(this),
+                    eq(message));
+        }
+        _observable.send(message);
+    }
+
+    /**
+     * Subscribes and then unsubscribes with a wrong id. Verifies that
+     * IllegalArgumentException is thrown.
+     * 
+     */
+    public void testUnsubscribeWithWrongSubscription() {
+        Mock mockObserver = mock(Observer.class);
+        Observer<ObservableTest, String> observer = (Observer<ObservableTest, String>) mockObserver
+                .proxy();
+        long subscription = _observable.subscribe(observer);
+
+        assertEquals(1, _observable.getObserverCount());
+
+        try {
+            _observable.unsubscribe(subscription + 1);
+        } catch (IllegalArgumentException e) {
+            return; // ok
+        }
+        fail();
+    }
+
+}