com.android.volley.mock.MockRequest Java Examples

/**
 * Verify RequestFinishedListeners are informed when requests are canceled
 *
 * Needs to be an integration test because relies on Request -> dispatcher -> RequestQueue interaction
 */
@Test public void add_requestFinishedListenerCanceled() throws Exception {
    RequestFinishedListener listener = mock(RequestFinishedListener.class);
    Request request = new MockRequest();
    Answer<NetworkResponse> delayAnswer = new Answer<NetworkResponse>() {
        @Override
        public NetworkResponse answer(InvocationOnMock invocationOnMock) throws Throwable {
            Thread.sleep(200);
            return mock(NetworkResponse.class);
        }
    };
    RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);

    when(mMockNetwork.performRequest(request)).thenAnswer(delayAnswer);

    queue.addRequestFinishedListener(listener);
    queue.start();
    queue.add(request);

    request.cancel();
    verify(listener, timeout(100)).onRequestFinished(request);
    queue.stop();
}
 

/**
 * Verify RequestFinishedListeners are informed when requests are successfully delivered
 *
 * Needs to be an integration test because relies on Request -> dispatcher -> RequestQueue
 * interaction
 */
@Test public void add_requestFinishedListenerSuccess() throws Exception {
    NetworkResponse response = mock(NetworkResponse.class);
    Request request = new MockRequest();
    RequestFinishedListener listener = mock(RequestFinishedListener.class);
    RequestFinishedListener listener2 = mock(RequestFinishedListener.class);
    RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);

    queue.addRequestFinishedListener(listener);
    queue.addRequestFinishedListener(listener2);
    queue.start();
    queue.add(request);

    verify(listener, timeout(100)).onRequestFinished(request);
    verify(listener2, timeout(100)).onRequestFinished(request);

    queue.stop();
}
 

/**
 * Verify RequestFinishedListeners are informed when requests are canceled
 *
 * Needs to be an integration test because relies on Request -> dispatcher -> RequestQueue
 * interaction
 */
@Test public void add_requestFinishedListenerCanceled() throws Exception {
    RequestFinishedListener listener = mock(RequestFinishedListener.class);
    Request request = new MockRequest();
    Answer<NetworkResponse> delayAnswer = new Answer<NetworkResponse>() {
        @Override public NetworkResponse answer(InvocationOnMock invocationOnMock)
                throws Throwable {
            Thread.sleep(200);
            return mock(NetworkResponse.class);
        }
    };
    RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);

    when(mMockNetwork.performRequest(request)).thenAnswer(delayAnswer);

    queue.addRequestFinishedListener(listener);
    queue.start();
    queue.add(request);

    request.cancel();
    verify(listener, timeout(100)).onRequestFinished(request);
    queue.stop();
}
 

public void testCancelAll_onlyCorrectTag() throws Exception {
    MockNetwork network = new MockNetwork();
    RequestQueue queue = new RequestQueue(new NoCache(), network, 3, mDelivery);
    Object tagA = new Object();
    Object tagB = new Object();
    MockRequest req1 = new MockRequest();
    req1.setTag(tagA);
    MockRequest req2 = new MockRequest();
    req2.setTag(tagB);
    MockRequest req3 = new MockRequest();
    req3.setTag(tagA);
    MockRequest req4 = new MockRequest();
    req4.setTag(tagA);

    queue.add(req1); // A
    queue.add(req2); // B
    queue.add(req3); // A
    queue.cancelAll(tagA);
    queue.add(req4); // A

    assertTrue(req1.cancel_called); // A cancelled
    assertFalse(req2.cancel_called); // B not cancelled
    assertTrue(req3.cancel_called); // A cancelled
    assertFalse(req4.cancel_called); // A added after cancel not cancelled
}
 

/**
 * Verify RequestFinishedListeners are informed when requests are canceled
 *
 * Needs to be an integration test because relies on Request -> dispatcher -> RequestQueue interaction
 */
@Test public void add_requestFinishedListenerCanceled() throws Exception {
    RequestFinishedListener listener = mock(RequestFinishedListener.class);
    Request request = new MockRequest();
    Answer<NetworkResponse> delayAnswer = new Answer<NetworkResponse>() {
        @Override
        public NetworkResponse answer(InvocationOnMock invocationOnMock) throws Throwable {
            Thread.sleep(200);
            return mock(NetworkResponse.class);
        }
    };
    RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);

    when(mMockNetwork.performRequest(request)).thenAnswer(delayAnswer);

    queue.addRequestFinishedListener(listener);
    queue.start();
    queue.add(request);

    request.cancel();
    verify(listener, timeout(100)).onRequestFinished(request);
    queue.stop();
}
 

/**
 * Verify RequestFinishedListeners are informed when requests are successfully delivered
 *
 * Needs to be an integration test because relies on Request -> dispatcher -> RequestQueue interaction
 */
@Test public void add_requestFinishedListenerSuccess() throws Exception {
    NetworkResponse response = mock(NetworkResponse.class);
    Request request = new MockRequest();
    RequestFinishedListener listener = mock(RequestFinishedListener.class);
    RequestFinishedListener listener2 = mock(RequestFinishedListener.class);
    RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);

    queue.addRequestFinishedListener(listener);
    queue.addRequestFinishedListener(listener2);
    queue.start();
    queue.add(request);

    verify(listener, timeout(100)).onRequestFinished(request);
    verify(listener2, timeout(100)).onRequestFinished(request);

    queue.stop();
}
 

/**
 * Verify RequestFinishedListeners are informed when requests are successfully delivered
 *
 * Needs to be an integration test because relies on Request -> dispatcher -> RequestQueue interaction
 */
@Test public void add_requestFinishedListenerSuccess() throws Exception {
    NetworkResponse response = mock(NetworkResponse.class);
    Request request = new MockRequest();
    RequestFinishedListener listener = mock(RequestFinishedListener.class);
    RequestFinishedListener listener2 = mock(RequestFinishedListener.class);
    RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);

    queue.addRequestFinishedListener(listener);
    queue.addRequestFinishedListener(listener2);
    queue.start();
    queue.add(request);

    verify(listener, timeout(100)).onRequestFinished(request);
    verify(listener2, timeout(100)).onRequestFinished(request);

    queue.stop();
}
 

/**
 * Verify RequestFinishedListeners are informed when requests are successfully delivered
 *
 * Needs to be an integration test because relies on Request -> dispatcher -> RequestQueue interaction
 */
@Test public void add_requestFinishedListenerSuccess() throws Exception {
    NetworkResponse response = mock(NetworkResponse.class);
    Request request = new MockRequest();
    RequestFinishedListener listener = mock(RequestFinishedListener.class);
    RequestFinishedListener listener2 = mock(RequestFinishedListener.class);
    RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);

    queue.addRequestFinishedListener(listener);
    queue.addRequestFinishedListener(listener2);
    queue.start();
    queue.add(request);

    verify(listener, timeout(100)).onRequestFinished(request);
    verify(listener2, timeout(100)).onRequestFinished(request);

    queue.stop();
}
 

/**
 * Verify RequestFinishedListeners are informed when requests are canceled
 *
 * Needs to be an integration test because relies on Request -> dispatcher -> RequestQueue interaction
 */
@Test public void add_requestFinishedListenerCanceled() throws Exception {
    RequestFinishedListener listener = mock(RequestFinishedListener.class);
    Request request = new MockRequest();
    Answer<NetworkResponse> delayAnswer = new Answer<NetworkResponse>() {
        @Override
        public NetworkResponse answer(InvocationOnMock invocationOnMock) throws Throwable {
            Thread.sleep(200);
            return mock(NetworkResponse.class);
        }
    };
    RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);

    when(mMockNetwork.performRequest(request)).thenAnswer(delayAnswer);

    queue.addRequestFinishedListener(listener);
    queue.start();
    queue.add(request);

    request.cancel();
    verify(listener, timeout(100)).onRequestFinished(request);
    queue.stop();
}
 

public void testCancelAll_onlyCorrectTag() throws Exception {
    MockNetwork network = new MockNetwork();
    RequestQueue queue = new RequestQueue(new NoCache(), network, 3, mDelivery);
    Object tagA = new Object();
    Object tagB = new Object();
    MockRequest req1 = new MockRequest();
    req1.setTag(tagA);
    MockRequest req2 = new MockRequest();
    req2.setTag(tagB);
    MockRequest req3 = new MockRequest();
    req3.setTag(tagA);
    MockRequest req4 = new MockRequest();
    req4.setTag(tagA);

    queue.add(req1); // A
    queue.add(req2); // B
    queue.add(req3); // A
    queue.cancelAll(tagA);
    queue.add(req4); // A

    assertTrue(req1.cancel_called); // A cancelled
    assertFalse(req2.cancel_called); // B not cancelled
    assertTrue(req3.cancel_called); // A cancelled
    assertFalse(req4.cancel_called); // A added after cancel not cancelled
}
 

/**
 * Verify RequestFinishedListeners are informed when requests are canceled
 *
 * Needs to be an integration test because relies on Request -> dispatcher -> RequestQueue interaction
 */
@Test public void add_requestFinishedListenerCanceled() throws Exception {
    RequestFinishedListener listener = mock(RequestFinishedListener.class);
    Request request = new MockRequest();
    Answer<NetworkResponse> delayAnswer = new Answer<NetworkResponse>() {
        @Override
        public NetworkResponse answer(InvocationOnMock invocationOnMock) throws Throwable {
            Thread.sleep(200);
            return mock(NetworkResponse.class);
        }
    };
    RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);

    when(mMockNetwork.performRequest(request)).thenAnswer(delayAnswer);

    queue.addRequestFinishedListener(listener);
    queue.start();
    queue.add(request);

    request.cancel();
    verify(listener, timeout(100)).onRequestFinished(request);
    queue.stop();
}
 

/** Verify RequestFinishedListeners are informed when requests are successfully delivered. */
@Test
public void add_requestFinishedListenerSuccess() throws Exception {
    MockRequest request = new MockRequest();
    RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);

    queue.addRequestFinishedListener(mMockListener);
    queue.addRequestFinishedListener(mMockListener2);
    queue.start();
    queue.add(request);

    verify(mMockListener, timeout(10000)).onRequestFinished(request);
    verify(mMockListener2, timeout(10000)).onRequestFinished(request);

    queue.stop();
}
 

/** Verify RequestFinishedListeners are informed when requests are canceled. */
@Test
public void add_requestFinishedListenerCanceled() throws Exception {
    MockRequest request = new MockRequest();
    Answer<NetworkResponse> delayAnswer =
            new Answer<NetworkResponse>() {
                @Override
                public NetworkResponse answer(InvocationOnMock invocationOnMock)
                        throws Throwable {
                    Thread.sleep(200);
                    return mock(NetworkResponse.class);
                }
            };
    RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);

    when(mMockNetwork.performRequest(request)).thenAnswer(delayAnswer);

    queue.addRequestFinishedListener(mMockListener);
    queue.start();
    queue.add(request);

    request.cancel();
    verify(mMockListener, timeout(10000)).onRequestFinished(request);
    queue.stop();
}
 

/**
 * Verify RequestFinishedListeners are informed when requests are successfully delivered
 *
 * Needs to be an integration test because relies on Request -> dispatcher -> RequestQueue interaction
 */
@Test public void add_requestFinishedListenerSuccess() throws Exception {
    NetworkResponse response = mock(NetworkResponse.class);
    Request request = new MockRequest();
    RequestFinishedListener listener = mock(RequestFinishedListener.class);
    RequestFinishedListener listener2 = mock(RequestFinishedListener.class);
    RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);

    queue.addRequestFinishedListener(listener);
    queue.addRequestFinishedListener(listener2);
    queue.start();
    queue.add(request);

    verify(listener, timeout(100)).onRequestFinished(request);
    verify(listener2, timeout(100)).onRequestFinished(request);

    queue.stop();
}
 

/**
 * Asserts that requests with same cache key are processed in order.
 *
 * Needs to be an integration test because relies on complex interations between various queues
 */
@Test public void add_dedupeByCacheKey() throws Exception {
    // Enqueue 2 requests with the same cache key. The first request takes 20ms. Assert that the
    // second request is only handled after the first one has been parsed and delivered.
    Request req1 = new MockRequest();
    Request req2 = new MockRequest();
    RequestFinishedListener listener = mock(RequestFinishedListener.class);
    Answer<NetworkResponse> delayAnswer = new Answer<NetworkResponse>() {
        @Override
        public NetworkResponse answer(InvocationOnMock invocationOnMock) throws Throwable {
            Thread.sleep(20);
            return mock(NetworkResponse.class);
        }
    };
    //delay only for first
    when(mMockNetwork.performRequest(req1)).thenAnswer(delayAnswer);
    when(mMockNetwork.performRequest(req2)).thenReturn(mock(NetworkResponse.class));

    RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 3, mDelivery);
    queue.addRequestFinishedListener(listener);
    queue.add(req1);
    queue.add(req2);
    queue.start();

    // you cannot do strict order verification with mockito 1.9.5 :(
    // as an alternative, first verify no requests have finished, then verify req1 goes through
    verifyNoMoreInteractions(listener);
    verify(listener, timeout(100)).onRequestFinished(req1);
    verify(listener, timeout(10)).onRequestFinished(req2);
    queue.stop();
}
 

/**
 * Asserts that requests with same cache key are processed in order.
 *
 * Needs to be an integration test because relies on complex interations between various queues
 */
@Test public void add_dedupeByCacheKey() throws Exception {
    // Enqueue 2 requests with the same cache key. The first request takes 20ms. Assert that the
    // second request is only handled after the first one has been parsed and delivered.
    Request req1 = new MockRequest();
    Request req2 = new MockRequest();
    RequestFinishedListener listener = mock(RequestFinishedListener.class);
    Answer<NetworkResponse> delayAnswer = new Answer<NetworkResponse>() {
        @Override
        public NetworkResponse answer(InvocationOnMock invocationOnMock) throws Throwable {
            Thread.sleep(20);
            return mock(NetworkResponse.class);
        }
    };
    //delay only for first
    when(mMockNetwork.performRequest(req1)).thenAnswer(delayAnswer);
    when(mMockNetwork.performRequest(req2)).thenReturn(mock(NetworkResponse.class));

    RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 3, mDelivery);
    queue.addRequestFinishedListener(listener);
    queue.add(req1);
    queue.add(req2);
    queue.start();

    // you cannot do strict order verification with mockito 1.9.5 :(
    // as an alternative, first verify no requests have finished, then verify req1 goes through
    verifyNoMoreInteractions(listener);
    verify(listener, timeout(100)).onRequestFinished(req1);
    verify(listener, timeout(10)).onRequestFinished(req2);
    queue.stop();
}
 

@Test public void add_requestProcessedInCorrectOrder() throws Exception {
    // Enqueue 2 requests with different cache keys, and different priorities. The second, higher priority request
    // takes 20ms.
    // Assert that first request is only handled after the first one has been parsed and delivered.
    MockRequest lowerPriorityReq = new MockRequest();
    MockRequest higherPriorityReq = new MockRequest();
    lowerPriorityReq.setCacheKey("1");
    higherPriorityReq.setCacheKey("2");
    lowerPriorityReq.setPriority(Priority.LOW);
    higherPriorityReq.setPriority(Priority.HIGH);

    RequestFinishedListener listener = mock(RequestFinishedListener.class);
    Answer<NetworkResponse> delayAnswer = new Answer<NetworkResponse>() {
        @Override
        public NetworkResponse answer(InvocationOnMock invocationOnMock) throws Throwable {
            Thread.sleep(20);
            return mock(NetworkResponse.class);
        }
    };
    //delay only for higher request
    when(mMockNetwork.performRequest(higherPriorityReq)).thenAnswer(delayAnswer);
    when(mMockNetwork.performRequest(lowerPriorityReq)).thenReturn(mock(NetworkResponse.class));

    RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);
    queue.addRequestFinishedListener(listener);
    queue.add(lowerPriorityReq);
    queue.add(higherPriorityReq);
    queue.start();

    // you cannot do strict order verification in combination with timeouts with mockito 1.9.5 :(
    // as an alternative, first verify no requests have finished, while higherPriorityReq should be processing
    verifyNoMoreInteractions(listener);
    // verify higherPriorityReq goes through first
    verify(listener, timeout(100)).onRequestFinished(higherPriorityReq);
    // verify lowerPriorityReq goes last
    verify(listener, timeout(10)).onRequestFinished(lowerPriorityReq);
    queue.stop();
}
 

@Before public void setUp() throws Exception {
    mCacheQueue = new WaitableQueue();
    mNetworkQueue = new WaitableQueue();
    mCache = new MockCache();
    mDelivery = new MockResponseDelivery();

    mRequest = new MockRequest();

    mDispatcher = new CacheDispatcher(mCacheQueue, mNetworkQueue, mCache, mDelivery);
    mDispatcher.start();
}
 

/**
 * Verify RequestFinishedListeners are informed when request errors
 *
 * Needs to be an integration test because relies on Request -> dispatcher -> RequestQueue interaction
 */
@Test public void add_requestFinishedListenerError() throws Exception {
    RequestFinishedListener listener = mock(RequestFinishedListener.class);
    Request request = new MockRequest();
    RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);

    when(mMockNetwork.performRequest(request)).thenThrow(new VolleyError());

    queue.addRequestFinishedListener(listener);
    queue.start();
    queue.add(request);

    verify(listener, timeout(100)).onRequestFinished(request);
    queue.stop();
}
 

@Before public void setUp() throws Exception {
    // Make the delivery just run its posted responses immediately.
    mDelivery = new ImmediateResponseDelivery();
    mRequest = new MockRequest();
    mRequest.setSequence(1);
    byte[] data = new byte[16];
    Cache.Entry cacheEntry = CacheTestUtils.makeRandomCacheEntry(data);
    mSuccessResponse = Response.success(data, cacheEntry);
}
 

@Before public void setUp() throws Exception {
    mDelivery = new MockResponseDelivery();
    mNetworkQueue = new WaitableQueue();
    mNetwork = new MockNetwork();
    mCache = new MockCache();
    mRequest = new MockRequest();
    mDispatcher = new NetworkDispatcher(mNetworkQueue, mNetwork, mCache, mDelivery);
    mDispatcher.start();
}
 

@Before public void setUp() throws Exception {
    mDelivery = new MockResponseDelivery();
    mNetworkQueue = new WaitableQueue();
    mNetwork = new MockNetwork();
    mCache = new MockCache();
    mRequest = new MockRequest();
    mDispatcher = new NetworkDispatcher(mNetworkQueue, mNetwork, mCache, mDelivery);
    mDispatcher.start();
}
 

@Before public void setUp() throws Exception {
    mCacheQueue = new WaitableQueue();
    mNetworkQueue = new WaitableQueue();
    mCache = new MockCache();
    mDelivery = new MockResponseDelivery();

    mRequest = new MockRequest();

    mDispatcher = new CacheDispatcher(mCacheQueue, mNetworkQueue, mCache, mDelivery);
    mDispatcher.start();
}
 

@Test public void add_requestProcessedInCorrectOrder() throws Exception {
    // Enqueue 2 requests with different cache keys, and different priorities. The second, higher priority request
    // takes 20ms.
    // Assert that first request is only handled after the first one has been parsed and delivered.
    MockRequest lowerPriorityReq = new MockRequest();
    MockRequest higherPriorityReq = new MockRequest();
    lowerPriorityReq.setCacheKey("1");
    higherPriorityReq.setCacheKey("2");
    lowerPriorityReq.setPriority(Priority.LOW);
    higherPriorityReq.setPriority(Priority.HIGH);

    RequestFinishedListener listener = mock(RequestFinishedListener.class);
    Answer<NetworkResponse> delayAnswer = new Answer<NetworkResponse>() {
        @Override
        public NetworkResponse answer(InvocationOnMock invocationOnMock) throws Throwable {
            Thread.sleep(20);
            return mock(NetworkResponse.class);
        }
    };
    //delay only for higher request
    when(mMockNetwork.performRequest(higherPriorityReq)).thenAnswer(delayAnswer);
    when(mMockNetwork.performRequest(lowerPriorityReq)).thenReturn(mock(NetworkResponse.class));

    RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);
    queue.addRequestFinishedListener(listener);
    queue.add(lowerPriorityReq);
    queue.add(higherPriorityReq);
    queue.start();

    // you cannot do strict order verification in combination with timeouts with mockito 1.9.5 :(
    // as an alternative, first verify no requests have finished, while higherPriorityReq should be processing
    verifyNoMoreInteractions(listener);
    // verify higherPriorityReq goes through first
    verify(listener, timeout(100)).onRequestFinished(higherPriorityReq);
    // verify lowerPriorityReq goes last
    verify(listener, timeout(10)).onRequestFinished(lowerPriorityReq);
    queue.stop();
}
 

/**
 * Verify RequestFinishedListeners are informed when request errors
 *
 * Needs to be an integration test because relies on Request -> dispatcher -> RequestQueue interaction
 */
@Test public void add_requestFinishedListenerError() throws Exception {
    RequestFinishedListener listener = mock(RequestFinishedListener.class);
    Request request = new MockRequest();
    RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);

    when(mMockNetwork.performRequest(request)).thenThrow(new VolleyError());

    queue.addRequestFinishedListener(listener);
    queue.start();
    queue.add(request);

    verify(listener, timeout(100)).onRequestFinished(request);
    queue.stop();
}
 

/**
 * Verify RequestFinishedListeners are informed when request errors
 *
 * Needs to be an integration test because relies on Request -> dispatcher -> RequestQueue interaction
 */
@Test public void add_requestFinishedListenerError() throws Exception {
    RequestFinishedListener listener = mock(RequestFinishedListener.class);
    Request request = new MockRequest();
    RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);

    when(mMockNetwork.performRequest(request)).thenThrow(new VolleyError());

    queue.addRequestFinishedListener(listener);
    queue.start();
    queue.add(request);

    verify(listener, timeout(100)).onRequestFinished(request);
    queue.stop();
}
 

@Before public void setUp() throws Exception {
    // Make the delivery just run its posted responses immediately.
    mDelivery = new ImmediateResponseDelivery();
    mRequest = new MockRequest();
    mRequest.setSequence(1);
    byte[] data = new byte[16];
    Cache.Entry cacheEntry = CacheTestUtils.makeRandomCacheEntry(data);
    mSuccessResponse = Response.success(data, cacheEntry);
}
 

@Before public void setUp() throws Exception {
    mDelivery = new MockResponseDelivery();
    mNetworkQueue = new WaitableQueue();
    mNetwork = new MockNetwork();
    mCache = new MockCache();
    mRequest = new MockRequest();
    mDispatcher = new NetworkDispatcher(mNetworkQueue, mNetwork, mCache, mDelivery);
    mDispatcher.start();
}
 

@Before public void setUp() throws Exception {
    mCacheQueue = new WaitableQueue();
    mNetworkQueue = new WaitableQueue();
    mCache = new MockCache();
    mDelivery = new MockResponseDelivery();

    mRequest = new MockRequest();

    mDispatcher = new CacheDispatcher(mCacheQueue, mNetworkQueue, mCache, mDelivery);
    mDispatcher.start();
}
 

@Test public void add_requestProcessedInCorrectOrder() throws Exception {
    // Enqueue 2 requests with different cache keys, and different priorities. The second, higher priority request
    // takes 20ms.
    // Assert that first request is only handled after the first one has been parsed and delivered.
    MockRequest lowerPriorityReq = new MockRequest();
    MockRequest higherPriorityReq = new MockRequest();
    lowerPriorityReq.setCacheKey("1");
    higherPriorityReq.setCacheKey("2");
    lowerPriorityReq.setPriority(Priority.LOW);
    higherPriorityReq.setPriority(Priority.HIGH);

    RequestFinishedListener listener = mock(RequestFinishedListener.class);
    Answer<NetworkResponse> delayAnswer = new Answer<NetworkResponse>() {
        @Override
        public NetworkResponse answer(InvocationOnMock invocationOnMock) throws Throwable {
            Thread.sleep(20);
            return mock(NetworkResponse.class);
        }
    };
    //delay only for higher request
    when(mMockNetwork.performRequest(higherPriorityReq)).thenAnswer(delayAnswer);
    when(mMockNetwork.performRequest(lowerPriorityReq)).thenReturn(mock(NetworkResponse.class));

    RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);
    queue.addRequestFinishedListener(listener);
    queue.add(lowerPriorityReq);
    queue.add(higherPriorityReq);
    queue.start();

    // you cannot do strict order verification in combination with timeouts with mockito 1.9.5 :(
    // as an alternative, first verify no requests have finished, while higherPriorityReq should be processing
    verifyNoMoreInteractions(listener);
    // verify higherPriorityReq goes through first
    verify(listener, timeout(100)).onRequestFinished(higherPriorityReq);
    // verify lowerPriorityReq goes last
    verify(listener, timeout(10)).onRequestFinished(lowerPriorityReq);
    queue.stop();
}