1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
/*
* 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.Request.Priority;
import com.android.volley.mock.MockNetwork;
import com.android.volley.mock.MockRequest;
import com.android.volley.toolbox.NoCache;
import com.android.volley.utils.CacheTestUtils;
import com.android.volley.utils.ImmediateResponseDelivery;
import android.os.SystemClock;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.RobolectricTestRunner;
import org.robolectric.annotation.Config;
import org.robolectric.annotation.Implements;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import static org.junit.Assert.*;
// TODO: Resurrect these tests when we have something like a finish() observer.
// They are really gross as-is and depend on a bunch of sleeping and whatnot.
@Ignore
@RunWith(RobolectricTestRunner.class)
public class RequestQueueTest {
private ResponseDelivery mDelivery;
@Before public void setUp() throws Exception {
mDelivery = new ImmediateResponseDelivery();
}
/**
* Make a list of requests with random priorities.
* @param count Number of requests to make
*/
private List<MockRequest> makeRequests(int count) {
Request.Priority[] allPriorities = Request.Priority.values();
Random random = new Random();
List<MockRequest> requests = new ArrayList<MockRequest>();
for (int i = 0; i < count; i++) {
MockRequest request = new MockRequest();
Request.Priority priority = allPriorities[random.nextInt(allPriorities.length)];
request.setCacheKey(String.valueOf(i));
request.setPriority(priority);
requests.add(request);
}
return requests;
}
@Test public void add_requestProcessedInCorrectOrder() throws Exception {
int requestsToMake = 100;
OrderCheckingNetwork network = new OrderCheckingNetwork();
RequestQueue queue = new RequestQueue(new NoCache(), network, 1, mDelivery);
for (Request<?> request : makeRequests(requestsToMake)) {
queue.add(request);
}
network.setExpectedRequests(requestsToMake);
queue.start();
network.waitUntilExpectedDone(2000); // 2 seconds
queue.stop();
}
@Test public void add_dedupeByCacheKey() throws Exception {
OrderCheckingNetwork network = new OrderCheckingNetwork();
final AtomicInteger parsed = new AtomicInteger();
final AtomicInteger delivered = new AtomicInteger();
// Enqueue 2 requests with the same cache key. The first request takes 1.5s. Assert that the
// second request is only handled after the first one has been parsed and delivered.
DelayedRequest req1 = new DelayedRequest(1500, parsed, delivered);
DelayedRequest req2 = new DelayedRequest(0, parsed, delivered) {
@Override
protected Response<Object> parseNetworkResponse(NetworkResponse response) {
assertEquals(1, parsed.get()); // req1 must have been parsed.
assertEquals(1, delivered.get()); // req1 must have been parsed.
return super.parseNetworkResponse(response);
}
};
network.setExpectedRequests(2);
RequestQueue queue = new RequestQueue(new NoCache(), network, 3, mDelivery);
queue.add(req1);
queue.add(req2);
queue.start();
network.waitUntilExpectedDone(2000);
queue.stop();
}
@Test public void cancelAll_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
}
private class OrderCheckingNetwork implements Network {
private Priority mLastPriority = Priority.IMMEDIATE;
private int mLastSequence = -1;
private Semaphore mSemaphore;
public void setExpectedRequests(int expectedRequests) {
// Leave one permit available so the waiter can find it.
expectedRequests--;
mSemaphore = new Semaphore(-expectedRequests);
}
public void waitUntilExpectedDone(long timeout)
throws InterruptedException, TimeoutError {
if (mSemaphore.tryAcquire(timeout, TimeUnit.MILLISECONDS) == false) {
throw new TimeoutError();
}
}
@Override
public NetworkResponse performRequest(Request<?> request) {
Priority thisPriority = request.getPriority();
int thisSequence = request.getSequence();
int priorityDiff = thisPriority.compareTo(mLastPriority);
// Should never experience a higher priority after a lower priority
assertFalse(priorityDiff > 0);
// If we're not transitioning to a new priority block, check sequence numbers
if (priorityDiff == 0) {
assertTrue(thisSequence > mLastSequence);
}
mLastSequence = thisSequence;
mLastPriority = thisPriority;
mSemaphore.release();
return new NetworkResponse(new byte[16]);
}
}
private class DelayedRequest extends Request<Object> {
private final long mDelayMillis;
private final AtomicInteger mParsedCount;
private final AtomicInteger mDeliveredCount;
public DelayedRequest(long delayMillis, AtomicInteger parsed, AtomicInteger delivered) {
super(Request.Method.GET, "http://buganizer/", null);
mDelayMillis = delayMillis;
mParsedCount = parsed;
mDeliveredCount = delivered;
}
@Override
protected Response<Object> parseNetworkResponse(NetworkResponse response) {
mParsedCount.incrementAndGet();
SystemClock.sleep(mDelayMillis);
return Response.success(new Object(), CacheTestUtils.makeRandomCacheEntry(null));
}
@Override
protected void deliverResponse(Object response) {
mDeliveredCount.incrementAndGet();
}
}
}
|
