/
ParallelTestContainer.java
78 lines (68 loc) · 2.6 KB
/
ParallelTestContainer.java
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
/*****************************************************************
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.cayenne.test.parallel;
/**
* Helper class allowing unit tests to wait till a code in question executes in
* a separate thread. There is still some element of uncertainty remains, since
* this implementation simply tries to give other threads enough time to
* execute, instead of watching for threads activity.
*
* <p>
* Note that result sampling is done every 300 ms., so if the test succeeds
* earlier, test case wouldn't have to wait for the whole time period specified
* by timeout.
* </p>
*
*/
public abstract class ParallelTestContainer {
protected abstract void assertResult() throws Exception;
public void runTest(long timeoutMs) throws Exception {
long checkEveryXMs;
int maxMumberOfChecks;
if (timeoutMs < 300) {
maxMumberOfChecks = 1;
checkEveryXMs = timeoutMs;
} else {
maxMumberOfChecks = Math.round(timeoutMs / 300.00f);
checkEveryXMs = 300;
}
// TODO: for things asserting that a certain event DID NOT happen
// we need a better implementation, that should probably sleep for
// the whole timeout interval, since otherwise we may have a false
// positive (i.e. assertion succeeded not because a certain thing did
// not happen, but rather cause it happened after the assertion was
// run).
// for now lets wait for at least one time slice to decrease
// the possibility of false positives
Thread.sleep(checkEveryXMs);
maxMumberOfChecks--;
for (int i = 0; i < maxMumberOfChecks; i++) {
try {
assertResult();
// success... return immediately
return;
} catch (Throwable th) {
// wait some more
Thread.sleep(checkEveryXMs);
}
}
// if it throws, it throws...
assertResult();
}
}