Subversion Repositories SmartDukaan

/*

 * Copyright (C) 2011 The Android Open Source Project

 *

 * 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 com.android.volley;

import com.android.volley.mock.MockCache;

import com.android.volley.mock.MockRequest;

import com.android.volley.mock.MockResponseDelivery;

import com.android.volley.mock.WaitableQueue;

import com.android.volley.utils.CacheTestUtils;

import org.junit.After;

import org.junit.Before;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.robolectric.RobolectricTestRunner;

import static org.junit.Assert.assertFalse;

import static org.junit.Assert.assertNull;

import static org.junit.Assert.assertSame;

import static org.junit.Assert.assertTrue;

@RunWith(RobolectricTestRunner.class)

@SuppressWarnings("rawtypes")

public class CacheDispatcherTest {

    private CacheDispatcher mDispatcher;

    private WaitableQueue mCacheQueue;

    private WaitableQueue mNetworkQueue;

    private MockCache mCache;

    private MockResponseDelivery mDelivery;

    private MockRequest mRequest;

    private static final long TIMEOUT_MILLIS = 5000;

    @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();

    }

    @After public void tearDown() throws Exception {

        mDispatcher.quit();

        mDispatcher.join();

    }

    // A cancelled request should not be processed at all.

    @Test public void cancelledRequest() throws Exception {

        mRequest.cancel();

        mCacheQueue.add(mRequest);

        mCacheQueue.waitUntilEmpty(TIMEOUT_MILLIS);

        assertFalse(mCache.getCalled);

        assertFalse(mDelivery.wasEitherResponseCalled());

    }

    // A cache miss does not post a response and puts the request on the network queue.

    @Test public void cacheMiss() throws Exception {

        mCacheQueue.add(mRequest);

        mCacheQueue.waitUntilEmpty(TIMEOUT_MILLIS);

        assertFalse(mDelivery.wasEitherResponseCalled());

        assertTrue(mNetworkQueue.size() > 0);

        Request request = mNetworkQueue.take();

        assertNull(request.getCacheEntry());

    }

    // A non-expired cache hit posts a response and does not queue to the network.

    @Test public void nonExpiredCacheHit() throws Exception {

        Cache.Entry entry = CacheTestUtils.makeRandomCacheEntry(null, false, false);

        mCache.setEntryToReturn(entry);

        mCacheQueue.add(mRequest);

        mCacheQueue.waitUntilEmpty(TIMEOUT_MILLIS);

        assertTrue(mDelivery.postResponse_called);

        assertFalse(mDelivery.postError_called);

    }

    // A soft-expired cache hit posts a response and queues to the network.

    @Test public void softExpiredCacheHit() throws Exception {

        Cache.Entry entry = CacheTestUtils.makeRandomCacheEntry(null, false, true);

        mCache.setEntryToReturn(entry);

        mCacheQueue.add(mRequest);

        mCacheQueue.waitUntilEmpty(TIMEOUT_MILLIS);

        assertTrue(mDelivery.postResponse_called);

        assertFalse(mDelivery.postError_called);

        assertTrue(mNetworkQueue.size() > 0);

        Request request = mNetworkQueue.take();

        assertSame(entry, request.getCacheEntry());

    }

    // An expired cache hit does not post a response and queues to the network.

    @Test public void expiredCacheHit() throws Exception {

        Cache.Entry entry = CacheTestUtils.makeRandomCacheEntry(null, true, true);

        mCache.setEntryToReturn(entry);

        mCacheQueue.add(mRequest);

        mCacheQueue.waitUntilEmpty(TIMEOUT_MILLIS);

        assertFalse(mDelivery.wasEitherResponseCalled());

        assertTrue(mNetworkQueue.size() > 0);

        Request request = mNetworkQueue.take();

        assertSame(entry, request.getCacheEntry());

    }

}