@SmallTest
@Feature({"Android-AppBase"})
public void testRemoveWhileIteration() {
ObserverList<Observer> observerList = new ObserverList<Observer>();
Foo a = new Foo(1);
Foo b = new Foo(-1);
Foo c = new Foo(1);
Foo d = new Foo(-1);
Foo e = new Foo(-1);
FooRemover evil = new FooRemover(observerList, c);
observerList.addObserver(a);
observerList.addObserver(b);
for (Observer obs : observerList) obs.observe(10);
// Removing an observer not in the list should do nothing.
observerList.removeObserver(e);
observerList.addObserver(evil);
observerList.addObserver(c);
observerList.addObserver(d);
for (Observer obs : observerList) obs.observe(10);
// observe should be called twice on a.
assertEquals(20, a.mTotal);
// observe should be called twice on b.
assertEquals(-20, b.mTotal);
// evil removed c from the observerList before it got any callbacks.
assertEquals(0, c.mTotal);
// observe should be called once on d.
assertEquals(-10, d.mTotal);
// e was never added to the list, observe should not be called.
assertEquals(0, e.mTotal);
}
@SmallTest
@Feature({"Android-AppBase"})
public void testAddWhileIteration() {
ObserverList<Observer> observerList = new ObserverList<Observer>();
Foo a = new Foo(1);
Foo b = new Foo(-1);
Foo c = new Foo(1);
FooAdder evil = new FooAdder(observerList, c);
observerList.addObserver(evil);
observerList.addObserver(a);
observerList.addObserver(b);
for (Observer obs : observerList) obs.observe(10);
assertTrue(observerList.hasObserver(c));
assertEquals(10, a.mTotal);
assertEquals(-10, b.mTotal);
assertEquals(0, c.mTotal);
}
