+ 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 = Integer.valueOf(1);
+ observable = new Observable<Integer, String>(observed,
+ new DefaultObserverNotifier());
+ }
+
+ /**
+ * Tests subscription and notification of one subscriber.
+ */
+ public void testOneObserver() {
+ final Observer mockObserver = mock(Observer.class);
+ InOrder order = inOrder(mockObserver);
+
+ long subscription = observable.subscribe(mockObserver);
+
+ assertEquals(1, observable.getObserverCount());
+
+ final String message = "hallo";
+ observable.send(message);
+
+ order.verify(mockObserver).send(observed, message);
+ verifyNoMoreInteractions(mockObserver);
+
+ observable.unsubscribe(subscription);
+ assertEquals(0, observable.getObserverCount());
+
+ observable.send(message);
+ verifyNoMoreInteractions(mockObserver);
+ }
+
+ /**
+ * 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];
+ final InOrder[] order = new InOrder[nsubscribers];
+
+ List<Long> subscriptions = new ArrayList<Long>();
+
+ for (int i = 0; i < nsubscribers; i++) {
+ mocks[i] = mock(Observer.class);
+ order[i] = inOrder(mocks[i]);
+
+ long subscription = observable.subscribe(mocks[i]);
+ assertTrue(subscriptions.add(subscription));
+ }
+
+ assertEquals(nsubscribers, observable.getObserverCount());
+
+ final String message = "hallo";
+
+ observable.send(message);
+
+ for (int i = 0; i < nsubscribers; i++) {
+ order[i].verify(mocks[i]).send(observed, message);
+ }
+
+ for (int i = nsubscribers / 2; i < nsubscribers; i++) {
+ observable.unsubscribe(subscriptions.get(i));
+ }
+
+ assertEquals(nsubscribers - (nsubscribers - (nsubscribers / 2)),
+ observable.getObserverCount());
+
+ final String message2 = "blabla";
+
+ observable.send(message2);
+
+ for (int i = 0; i < (nsubscribers / 2); i++) {
+ order[i].verify(mocks[i]).send(observed, message2);
+ }
+
+ for (int i = nsubscribers / 2; i < nsubscribers; i++) {
+ verifyNoMoreInteractions(mocks[i]);
+ }
+ }
+
+ /**
+ * Subscribes and then unsubscribes with a wrong id. Verifies that
+ * IllegalArgumentException is thrown.
+ *
+ */
+ public void testUnsubscribeWithWrongSubscription() {
+ Observer<Integer, String> observer = mock(Observer.class);
+
+ long subscription = observable.subscribe(observer);
+
+ assertEquals(1, observable.getObserverCount());
+
+ try {
+ observable.unsubscribe(subscription + 1);
+ } catch (IllegalArgumentException e) {
+ return; // ok
+ }