forked from ReactiveX/RxJava
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathObserveOnTests.java
More file actions
133 lines (108 loc) · 4.43 KB
/
ObserveOnTests.java
File metadata and controls
133 lines (108 loc) · 4.43 KB
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
/**
* 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.junit.Assert.*;
import java.util.concurrent.atomic.AtomicInteger;
import org.junit.Test;
import rx.schedulers.Schedulers;
import rx.util.functions.Action1;
import rx.util.functions.Func1;
public class ObserveOnTests {
/**
* Confirm that running on a NewThreadScheduler uses the same thread for the entire stream
*/
@Test
public void testObserveOnWithNewThreadScheduler() {
final AtomicInteger count = new AtomicInteger();
final int _multiple = 99;
Observable.range(1, 100000).map(new Func1<Integer, Integer>() {
@Override
public Integer call(Integer t1) {
return t1 * _multiple;
}
}).observeOn(Schedulers.newThread())
.toBlockingObservable().forEach(new Action1<Integer>() {
@Override
public void call(Integer t1) {
assertEquals(count.incrementAndGet() * _multiple, t1.intValue());
assertTrue(Thread.currentThread().getName().startsWith("RxNewThreadScheduler"));
}
});
}
/**
* Confirm that running on a ThreadPoolScheduler allows multiple threads but is still ordered.
*/
@Test
public void testObserveOnWithThreadPoolScheduler() {
final AtomicInteger count = new AtomicInteger();
final int _multiple = 99;
Observable.range(1, 100000).map(new Func1<Integer, Integer>() {
@Override
public Integer call(Integer t1) {
return t1 * _multiple;
}
}).observeOn(Schedulers.threadPoolForComputation())
.toBlockingObservable().forEach(new Action1<Integer>() {
@Override
public void call(Integer t1) {
assertEquals(count.incrementAndGet() * _multiple, t1.intValue());
assertTrue(Thread.currentThread().getName().startsWith("RxComputationThreadPool"));
}
});
}
/**
* Attempts to confirm that when pauses exist between events, the ScheduledObserver
* does not lose or reorder any events since the scheduler will not block, but will
* be re-scheduled when it receives new events after each pause.
*
*
* This is non-deterministic in proving success, but if it ever fails (non-deterministically)
* it is a sign of potential issues as thread-races and scheduling should not affect output.
*/
@Test
public void testObserveOnOrderingConcurrency() {
final AtomicInteger count = new AtomicInteger();
final int _multiple = 99;
Observable.range(1, 10000).map(new Func1<Integer, Integer>() {
@Override
public Integer call(Integer t1) {
if (randomIntFrom0to100() > 98) {
try {
Thread.sleep(2);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
return t1 * _multiple;
}
}).observeOn(Schedulers.threadPoolForComputation())
.toBlockingObservable().forEach(new Action1<Integer>() {
@Override
public void call(Integer t1) {
assertEquals(count.incrementAndGet() * _multiple, t1.intValue());
assertTrue(Thread.currentThread().getName().startsWith("RxComputationThreadPool"));
}
});
}
private static int randomIntFrom0to100() {
// XORShift instead of Math.random http://javamex.com/tutorials/random_numbers/xorshift.shtml
long x = System.nanoTime();
x ^= (x << 21);
x ^= (x >>> 35);
x ^= (x << 4);
return Math.abs((int) x % 100);
}
}