Does RxJava2 auto dispose observable when they call completed or error?

Question

I have a question about the disposal on RxJava. I found this below sentence on RxSwift document on Github.

When a sequence sends the completed

Answer 1

Yes, all associated resources will be disposed automatically. To illustrate run following test with RxJava 2:

boolean isDisposed = false;

@Test 
public void testDisposed(){
    TestObserver<Integer> to = Observable.<Integer>create(subscriber -> {
        subscriber.setDisposable(new Disposable() {

            @Override
            public boolean isDisposed() {
                return isDisposed;
            }

            @Override
            public void dispose() {
                isDisposed = true;
            }
        });
        subscriber.onComplete();
    }).test();

    to.assertComplete();
    assertTrue(isDisposed);
}