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package cgeo.geocaching.utils;
import android.test.AndroidTestCase;
public class MemorySubjectTest extends AndroidTestCase {
private static class Observer implements IObserver<Integer> {
private int times = 0;
private Integer value;
@Override
public void update(final Integer data) {
value = data;
times++;
}
}
private Observer observer;
private MemorySubject<Integer> memorySubject;
@Override
public void setUp() throws Exception {
super.setUp();
observer = new Observer();
memorySubject = new MemorySubject<Integer>();
}
public void testInitial() {
assertNull(observer.value);
assertEquals(0, observer.times);
assertNull(memorySubject.getMemory());
}
public void testMemory() {
memorySubject.addObserver(observer);
memorySubject.notifyObservers(10);
assertEquals(Integer.valueOf(10), observer.value);
assertEquals(1, observer.times);
assertEquals(Integer.valueOf(10), memorySubject.getMemory());
memorySubject.notifyObservers(20);
assertEquals(Integer.valueOf(20), observer.value);
assertEquals(2, observer.times);
assertEquals(Integer.valueOf(20), memorySubject.getMemory());
}
public void testAttach() {
memorySubject.notifyObservers(10);
assertNull(observer.value);
assertEquals(0, observer.times);
memorySubject.addObserver(observer);
assertEquals(Integer.valueOf(10), observer.value);
assertEquals(1, observer.times);
memorySubject.notifyObservers(20);
assertEquals(Integer.valueOf(20), observer.value);
assertEquals(2, observer.times);
}
public void testDetach() {
memorySubject.addObserver(observer);
memorySubject.notifyObservers(10);
assertEquals(Integer.valueOf(10), observer.value);
assertEquals(1, observer.times);
assertEquals(Integer.valueOf(10), memorySubject.getMemory());
memorySubject.deleteObserver(observer);
memorySubject.notifyObservers(20);
assertEquals(Integer.valueOf(10), observer.value);
assertEquals(1, observer.times);
assertEquals(Integer.valueOf(20), memorySubject.getMemory());
}
public void testMultiple() {
final Observer otherObserver = new Observer();
memorySubject.addObserver(otherObserver);
testDetach();
assertEquals(Integer.valueOf(20), otherObserver.value);
assertEquals(2, otherObserver.times);
}
}
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