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/**

* Copyright 2013 Netflix, Inc.

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

* http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*/

package rx;

import static org.mockito.Matchers.any;

import static org.mockito.Mockito.inOrder;

import static org.mockito.Mockito.mock;

import static org.mockito.Mockito.never;

import static org.mockito.Mockito.times;

import static org.mockito.Mockito.verify;

import java.util.concurrent.TimeUnit;

import java.util.concurrent.TimeoutException;

import org.junit.Before;

import org.junit.Test;

import org.mockito.InOrder;

import org.mockito.MockitoAnnotations;

import rx.schedulers.TestScheduler;

import rx.subjects.PublishSubject;

public class TimeoutTests {

private PublishSubject<String> underlyingSubject;

private TestScheduler testScheduler;

private Observable<String> withTimeout;

private static final long TIMEOUT = 3;

private static final TimeUnit TIME_UNIT = TimeUnit.SECONDS;

@Before

public void setUp() {

MockitoAnnotations.initMocks(this);

underlyingSubject = PublishSubject.create();

testScheduler = new TestScheduler();

withTimeout = underlyingSubject.timeout(TIMEOUT, TIME_UNIT, testScheduler);

}

@Test

public void shouldNotTimeoutIfOnNextWithinTimeout() {

@SuppressWarnings("unchecked")

Observer<String> observer = mock(Observer.class);

Subscription subscription = withTimeout.subscribe(observer);

testScheduler.advanceTimeBy(2, TimeUnit.SECONDS);

underlyingSubject.onNext("One");

verify(observer).onNext("One");

testScheduler.advanceTimeBy(2, TimeUnit.SECONDS);

verify(observer, never()).onError(any(Throwable.class));

subscription.unsubscribe();

}

@Test

public void shouldNotTimeoutIfSecondOnNextWithinTimeout() {

@SuppressWarnings("unchecked")

Observer<String> observer = mock(Observer.class);

Subscription subscription = withTimeout.subscribe(observer);

testScheduler.advanceTimeBy(2, TimeUnit.SECONDS);

underlyingSubject.onNext("One");

testScheduler.advanceTimeBy(2, TimeUnit.SECONDS);

underlyingSubject.onNext("Two");

verify(observer).onNext("Two");

testScheduler.advanceTimeBy(2, TimeUnit.SECONDS);

verify(observer, never()).onError(any(Throwable.class));

subscription.unsubscribe();

}

@Test

public void shouldTimeoutIfOnNextNotWithinTimeout() {

@SuppressWarnings("unchecked")

Observer<String> observer = mock(Observer.class);

Subscription subscription = withTimeout.subscribe(observer);

testScheduler.advanceTimeBy(TIMEOUT + 1, TimeUnit.SECONDS);

verify(observer).onError(any(TimeoutException.class));

subscription.unsubscribe();

}

@Test

public void shouldTimeoutIfSecondOnNextNotWithinTimeout() {

@SuppressWarnings("unchecked")

Observer<String> observer = mock(Observer.class);

Subscription subscription = withTimeout.subscribe(observer);

testScheduler.advanceTimeBy(2, TimeUnit.SECONDS);

underlyingSubject.onNext("One");

verify(observer).onNext("One");

testScheduler.advanceTimeBy(TIMEOUT + 1, TimeUnit.SECONDS);

verify(observer).onError(any(TimeoutException.class));

subscription.unsubscribe();

}

@Test

public void shouldCompleteIfUnderlyingComletes() {

@SuppressWarnings("unchecked")

Observer<String> observer = mock(Observer.class);

Subscription subscription = withTimeout.subscribe(observer);

testScheduler.advanceTimeBy(2, TimeUnit.SECONDS);

underlyingSubject.onCompleted();

testScheduler.advanceTimeBy(2, TimeUnit.SECONDS);

verify(observer).onCompleted();

verify(observer, never()).onError(any(Throwable.class));

subscription.unsubscribe();

}

@Test

public void shouldErrorIfUnderlyingErrors() {

@SuppressWarnings("unchecked")

Observer<String> observer = mock(Observer.class);

Subscription subscription = withTimeout.subscribe(observer);

testScheduler.advanceTimeBy(2, TimeUnit.SECONDS);

underlyingSubject.onError(new UnsupportedOperationException());

testScheduler.advanceTimeBy(2, TimeUnit.SECONDS);

verify(observer).onError(any(UnsupportedOperationException.class));

subscription.unsubscribe();

}

@Test

public void shouldSwitchToOtherIfOnNextNotWithinTimeout() {

Observable<String> other = Observable.from("a", "b", "c");

Observable<String> source = underlyingSubject.timeout(TIMEOUT, TIME_UNIT, other, testScheduler);

@SuppressWarnings("unchecked")

Observer<String> observer = mock(Observer.class);

Subscription subscription = source.subscribe(observer);

testScheduler.advanceTimeBy(2, TimeUnit.SECONDS);

underlyingSubject.onNext("One");

testScheduler.advanceTimeBy(4, TimeUnit.SECONDS);

underlyingSubject.onNext("Two");

InOrder inOrder = inOrder(observer);

inOrder.verify(observer, times(1)).onNext("One");

inOrder.verify(observer, times(1)).onNext("a");

inOrder.verify(observer, times(1)).onNext("b");

inOrder.verify(observer, times(1)).onNext("c");

inOrder.verify(observer, times(1)).onCompleted();

inOrder.verifyNoMoreInteractions();

subscription.unsubscribe();

}

@Test

public void shouldSwitchToOtherIfOnErrorNotWithinTimeout() {

Observable<String> other = Observable.from("a", "b", "c");

Observable<String> source = underlyingSubject.timeout(TIMEOUT, TIME_UNIT, other, testScheduler);

@SuppressWarnings("unchecked")

Observer<String> observer = mock(Observer.class);

Subscription subscription = source.subscribe(observer);

testScheduler.advanceTimeBy(2, TimeUnit.SECONDS);

underlyingSubject.onNext("One");

testScheduler.advanceTimeBy(4, TimeUnit.SECONDS);

underlyingSubject.onError(new UnsupportedOperationException());

InOrder inOrder = inOrder(observer);

inOrder.verify(observer, times(1)).onNext("One");

inOrder.verify(observer, times(1)).onNext("a");

inOrder.verify(observer, times(1)).onNext("b");

inOrder.verify(observer, times(1)).onNext("c");

inOrder.verify(observer, times(1)).onCompleted();

inOrder.verifyNoMoreInteractions();

subscription.unsubscribe();

}

@Test

public void shouldSwitchToOtherIfOnCompletedNotWithinTimeout() {

Observable<String> other = Observable.from("a", "b", "c");

Observable<String> source = underlyingSubject.timeout(TIMEOUT, TIME_UNIT, other, testScheduler);

@SuppressWarnings("unchecked")

Observer<String> observer = mock(Observer.class);

Subscription subscription = source.subscribe(observer);

testScheduler.advanceTimeBy(2, TimeUnit.SECONDS);

underlyingSubject.onNext("One");

testScheduler.advanceTimeBy(4, TimeUnit.SECONDS);

underlyingSubject.onCompleted();

InOrder inOrder = inOrder(observer);

inOrder.verify(observer, times(1)).onNext("One");

inOrder.verify(observer, times(1)).onNext("a");

inOrder.verify(observer, times(1)).onNext("b");

inOrder.verify(observer, times(1)).onNext("c");

inOrder.verify(observer, times(1)).onCompleted();

inOrder.verifyNoMoreInteractions();

subscription.unsubscribe();

}

@Test

public void shouldSwitchToOtherAndCanBeUnsubscribedIfOnNextNotWithinTimeout() {

PublishSubject<String> other = PublishSubject.create();

Observable<String> source = underlyingSubject.timeout(TIMEOUT, TIME_UNIT, other, testScheduler);

@SuppressWarnings("unchecked")

Observer<String> observer = mock(Observer.class);

Subscription subscription = source.subscribe(observer);

testScheduler.advanceTimeBy(2, TimeUnit.SECONDS);

underlyingSubject.onNext("One");

testScheduler.advanceTimeBy(4, TimeUnit.SECONDS);

underlyingSubject.onNext("Two");

other.onNext("a");

other.onNext("b");

subscription.unsubscribe();

// The following messages should not be delivered.

other.onNext("c");

other.onNext("d");

other.onCompleted();

InOrder inOrder = inOrder(observer);

inOrder.verify(observer, times(1)).onNext("One");

inOrder.verify(observer, times(1)).onNext("a");

inOrder.verify(observer, times(1)).onNext("b");

inOrder.verifyNoMoreInteractions();

}

}