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
|
// Copyright 2015 The Bazel Authors. All rights reserved.
//
// 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.google.devtools.build.lib.shell;
import static org.junit.Assert.assertTrue;
import com.google.devtools.build.lib.shell.Consumers.OutErrConsumers;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Tests that InterruptedExceptions can't derail FutureConsumption
* instances; well, FutureConsumption is really an implementation detail,
* but we want to exercise this code, so what ...
*/
@RunWith(JUnit4.class)
public class FutureConsumptionTest {
@Before
public void setUp() throws Exception {
// enable all log statements to ensure there are no problems with
// logging code
Logger.getLogger("com.google.devtools.build.lib.shell.Command").setLevel(Level.FINEST);
}
private OutputStream DEV_NULL = new OutputStream() {
@Override
public void write(int b) {}
};
@Test
public void testFutureConsumptionIgnoresInterruptedExceptions()
throws Exception {
// Set this up so that the consumer actually have to stream stuff into
// DEV_NULL, which the discards everything.
OutErrConsumers outErr = Consumers.createStreamingConsumers(DEV_NULL,
DEV_NULL);
final AtomicBoolean inputFinished = new AtomicBoolean(false);
// We keep producing input until the other thread (the main test thread)
// tells us to shut up ...
InputStream outInput = new InputStream() {
@Override
public int read() {
if (inputFinished.get()){
return -1;
}
return 0;
}
};
ByteArrayInputStream errInput = new ByteArrayInputStream(new byte[0]);
outErr.registerInputs(outInput, errInput, false);
// OK, this is the main test thread, which we need to interrupt *while*
// it's waiting in outErr.waitForCompletion()
final Thread testThread = Thread.currentThread();
// go into a different thread, wait a bit, interrupt the test thread,
// wait a bit, and tell the input stream to finish.
new Thread() {
@Override
public void run() {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {}
testThread.interrupt(); // this is what we're testing; basic
try {
Thread.sleep(1000);
} catch (InterruptedException e) {}
inputFinished.set(true);
}
}.start();
outErr.waitForCompletion();
// In addition to asserting that we were interrupted, this clears the interrupt bit of the
// current thread, since Junit doesn't do it for us. This avoids the next test to run starting
// in an interrupted state.
assertTrue(Thread.interrupted());
}
}
|
