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Make FileSystemWatcherTests thread-safe 

The list of changes is written to on one thread and read from on
another. Without some form of sychronization this is not thread-safe.

This commit makes changes a synchronized list which should guarantee
that the reading thread can see the changes made by the writing thread.
It also removes a redundant call to clear the list of changes at the
start of waitsForPollingInterval.

See gh-6038
This commit is contained in:
Andy Wilkinson 2016-05-25 20:59:03 +01:00
parent a98d1a41a4
commit 9f425343ae
1 changed files with 4 additions and 3 deletions
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7
spring-boot-devtools/src/test/java/org/springframework/boot/devtools/filewatch/FileSystemWatcherTests.java
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@ -1,5 +1,5 @@
/*
* Copyright 2012-2015 the original author or authors.
* Copyright 2012-2016 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -23,6 +23,7 @@ import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
@ -56,7 +57,8 @@ public class FileSystemWatcherTests {
private FileSystemWatcher watcher;
private List<Set<ChangedFiles>> changes = new ArrayList<Set<ChangedFiles>>();
private List<Set<ChangedFiles>> changes = Collections
.synchronizedList(new ArrayList<Set<ChangedFiles>>());
@Rule
public TemporaryFolder temp = new TemporaryFolder();
@ -158,7 +160,6 @@ public class FileSystemWatcherTests {
@Test
public void waitsForPollingInterval() throws Exception {
this.changes.clear();
setupWatcher(100, 1);
File folder = startWithNewFolder();
touch(new File(folder, "test1.txt"));