@Test(expected = NullPointerException.class) public void firstNull() { just1.first(null); }
@Test public void testFirstOrDefaultWithOneElement() { Single<Integer> o = Observable.just(1).first(2); o.subscribe(wo); InOrder inOrder = inOrder(wo); inOrder.verify(wo, times(1)).onSuccess(1); inOrder.verifyNoMoreInteractions(); }
@Test public void testFirstOrDefault() { Single<Integer> o = Observable.just(1, 2, 3) .first(4); o.subscribe(wo); InOrder inOrder = inOrder(wo); inOrder.verify(wo, times(1)).onSuccess(1); inOrder.verifyNoMoreInteractions(); }
@Test public void testFirstOrElseOfSome() { Observable<String> src = Observable.just("a", "b", "c"); src.first("default").subscribe(wo); verify(wo, times(1)).onSuccess(anyString()); verify(wo, times(1)).onSuccess("a"); verify(wo, never()).onError(any(Throwable.class)); }
@Test public void testFirstOrElseWithPredicateOfNoneMatchingThePredicate() { Observable<String> src = Observable.just("a", "b", "c"); src.filter(IS_D).first("default").subscribe(wo); verify(wo, times(1)).onSuccess(anyString()); verify(wo, times(1)).onSuccess("default"); verify(wo, never()).onError(any(Throwable.class)); }
@Test public void testFirstOrElseWithPredicateOfSome() { Observable<String> src = Observable.just("a", "b", "c", "d", "e", "f"); src.filter(IS_D).first("default").subscribe(wo); verify(wo, times(1)).onSuccess(anyString()); verify(wo, times(1)).onSuccess("d"); verify(wo, never()).onError(any(Throwable.class)); }
@Test public void testFirstOrElseWithPredicateOfNoneMatchingThePredicateObservable() { Observable<String> src = Observable.just("a", "b", "c"); src.filter(IS_D).first("default").toObservable().subscribe(w); verify(w, times(1)).onNext(anyString()); verify(w, times(1)).onNext("default"); verify(w, never()).onError(any(Throwable.class)); verify(w, times(1)).onComplete(); }
@Test public void testFirstOrElseOfNone() { Observable<String> src = Observable.empty(); src.first("default").subscribe(wo); verify(wo, times(1)).onSuccess(anyString()); verify(wo, times(1)).onSuccess("default"); verify(wo, never()).onError(any(Throwable.class)); }
@Test public void testFirstOrElseOfSomeObservable() { Observable<String> src = Observable.just("a", "b", "c"); src.first("default").toObservable().subscribe(w); verify(w, times(1)).onNext(anyString()); verify(w, times(1)).onNext("a"); verify(w, never()).onError(any(Throwable.class)); verify(w, times(1)).onComplete(); }
@Test public void testFirstOrElseOfNoneObservable() { Observable<String> src = Observable.empty(); src.first("default").toObservable().subscribe(w); verify(w, times(1)).onNext(anyString()); verify(w, times(1)).onNext("default"); verify(w, never()).onError(any(Throwable.class)); verify(w, times(1)).onComplete(); }
@Test public void testFirstOrElseWithPredicateOfSomeObservable() { Observable<String> src = Observable.just("a", "b", "c", "d", "e", "f"); src.filter(IS_D).first("default").toObservable().subscribe(w); verify(w, times(1)).onNext(anyString()); verify(w, times(1)).onNext("d"); verify(w, never()).onError(any(Throwable.class)); verify(w, times(1)).onComplete(); }
@Test public void testFirstOrDefaultWithEmpty() { Single<Integer> o = Observable.<Integer> empty() .first(1); o.subscribe(wo); InOrder inOrder = inOrder(wo); inOrder.verify(wo, times(1)).onSuccess(1); inOrder.verifyNoMoreInteractions(); }
@Test public void testFirstOrDefaultWithOneElementObservable() { Observable<Integer> o = Observable.just(1).first(2).toObservable(); Observer<Integer> observer = TestHelper.mockObserver(); o.subscribe(observer); InOrder inOrder = inOrder(observer); inOrder.verify(observer, times(1)).onNext(1); inOrder.verify(observer, times(1)).onComplete(); inOrder.verifyNoMoreInteractions(); }
@Test public void testFirstOrDefaultWithPredicate() { Single<Integer> o = Observable.just(1, 2, 3, 4, 5, 6) .filter(new Predicate<Integer>() { @Override public boolean test(Integer t1) { return t1 % 2 == 0; } }) .first(8); o.subscribe(wo); InOrder inOrder = inOrder(wo); inOrder.verify(wo, times(1)).onSuccess(2); inOrder.verifyNoMoreInteractions(); }
@Test public void testFirstOrDefaultWithPredicateAndOneElement() { Single<Integer> o = Observable.just(1, 2) .filter(new Predicate<Integer>() { @Override public boolean test(Integer t1) { return t1 % 2 == 0; } }) .first(4); o.subscribe(wo); InOrder inOrder = inOrder(wo); inOrder.verify(wo, times(1)).onSuccess(2); inOrder.verifyNoMoreInteractions(); }
@Test public void testFirstOrDefaultObservable() { Observable<Integer> o = Observable.just(1, 2, 3) .first(4).toObservable(); Observer<Integer> observer = TestHelper.mockObserver(); o.subscribe(observer); InOrder inOrder = inOrder(observer); inOrder.verify(observer, times(1)).onNext(1); inOrder.verify(observer, times(1)).onComplete(); inOrder.verifyNoMoreInteractions(); }
@Test public void testFirstOrDefaultWithPredicateAndEmpty() { Single<Integer> o = Observable.just(1) .filter(new Predicate<Integer>() { @Override public boolean test(Integer t1) { return t1 % 2 == 0; } }) .first(2); o.subscribe(wo); InOrder inOrder = inOrder(wo); inOrder.verify(wo, times(1)).onSuccess(2); inOrder.verifyNoMoreInteractions(); }
@Test public void testFirstOrDefaultWithEmptyObservable() { Observable<Integer> o = Observable.<Integer> empty() .first(1).toObservable(); Observer<Integer> observer = TestHelper.mockObserver(); o.subscribe(observer); InOrder inOrder = inOrder(observer); inOrder.verify(observer, times(1)).onNext(1); inOrder.verify(observer, times(1)).onComplete(); inOrder.verifyNoMoreInteractions(); }
@Test public void testFirstOrDefaultWithPredicateObservable() { Observable<Integer> o = Observable.just(1, 2, 3, 4, 5, 6) .filter(new Predicate<Integer>() { @Override public boolean test(Integer t1) { return t1 % 2 == 0; } }) .first(8).toObservable(); Observer<Integer> observer = TestHelper.mockObserver(); o.subscribe(observer); InOrder inOrder = inOrder(observer); inOrder.verify(observer, times(1)).onNext(2); inOrder.verify(observer, times(1)).onComplete(); inOrder.verifyNoMoreInteractions(); }
@Test public void testFirstOrDefaultWithPredicateAndEmptyObservable() { Observable<Integer> o = Observable.just(1) .filter(new Predicate<Integer>() { @Override public boolean test(Integer t1) { return t1 % 2 == 0; } }) .first(2).toObservable(); Observer<Integer> observer = TestHelper.mockObserver(); o.subscribe(observer); InOrder inOrder = inOrder(observer); inOrder.verify(observer, times(1)).onNext(2); inOrder.verify(observer, times(1)).onComplete(); inOrder.verifyNoMoreInteractions(); }