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
|
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/dns/watching_file_reader.h"
#include "base/message_loop.h"
#include "base/synchronization/lock.h"
#include "base/synchronization/waitable_event.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace net {
namespace {
class WatchingFileReaderTest : public testing::Test {
public:
// Mocks
class MockWorker : public SerialWorker {
public:
explicit MockWorker(WatchingFileReaderTest* t) : test_(t) {}
virtual void WorkNow() OVERRIDE {
test_->OnWork();
}
virtual void DoWork() OVERRIDE {}
virtual void OnWorkFinished() OVERRIDE {}
private:
virtual ~MockWorker() {}
WatchingFileReaderTest* test_;
};
class MockFilePathWatcherShim
: public FilePathWatcherShim {
public:
typedef base::files::FilePathWatcher::Delegate Delegate;
explicit MockFilePathWatcherShim(WatchingFileReaderTest* t) : test_(t) {}
virtual ~MockFilePathWatcherShim() {
test_->OnShimDestroyed(this);
}
// Enforce one-Watch-per-lifetime as the original FilePathWatcher
virtual bool Watch(const FilePath& path,
Delegate* delegate) OVERRIDE {
EXPECT_TRUE(path_.empty()) << "Only one-Watch-per-lifetime allowed.";
EXPECT_TRUE(!delegate_.get());
path_ = path;
delegate_ = delegate;
return test_->OnWatch();
}
void PathChanged() {
delegate_->OnFilePathChanged(path_);
}
void PathError() {
delegate_->OnFilePathError(path_);
}
private:
FilePath path_;
scoped_refptr<Delegate> delegate_;
WatchingFileReaderTest* test_;
};
class MockFilePathWatcherFactory
: public FilePathWatcherFactory {
public:
explicit MockFilePathWatcherFactory(WatchingFileReaderTest* t)
: test(t) {}
virtual FilePathWatcherShim*
CreateFilePathWatcher() OVERRIDE {
return test->CreateFilePathWatcher();
}
WatchingFileReaderTest* test;
};
// Helpers for mocks.
FilePathWatcherShim* CreateFilePathWatcher() {
watcher_shim_ = new MockFilePathWatcherShim(this);
return watcher_shim_;
}
void OnShimDestroyed(MockFilePathWatcherShim* destroyed_shim) {
// Precaution to avoid segfault.
if (watcher_shim_ == destroyed_shim)
watcher_shim_ = NULL;
}
// On each event, post QuitTask to allow use of MessageLoop::Run() to
// synchronize the threads.
bool OnWatch() {
EXPECT_TRUE(message_loop_ == MessageLoop::current());
BreakNow("OnWatch");
return !fail_on_watch_;
}
void OnWork() {
EXPECT_TRUE(message_loop_ == MessageLoop::current());
BreakNow("OnWork");
}
protected:
friend class BreakTask;
class BreakTask : public Task {
public:
BreakTask(WatchingFileReaderTest* test, std::string breakpoint)
: test_(test), breakpoint_(breakpoint) {}
virtual ~BreakTask() {}
virtual void Run() OVERRIDE {
test_->breakpoint_ = breakpoint_;
MessageLoop::current()->QuitNow();
}
private:
WatchingFileReaderTest* test_;
std::string breakpoint_;
};
void BreakNow(std::string b) {
message_loop_->PostTask(FROM_HERE, new BreakTask(this, b));
}
void RunUntilBreak(std::string b) {
message_loop_->Run();
ASSERT_EQ(breakpoint_, b);
}
WatchingFileReaderTest()
: watcher_shim_(NULL),
fail_on_watch_(false),
message_loop_(MessageLoop::current()),
watcher_(new WatchingFileReader()) {
watcher_->set_watcher_factory(new MockFilePathWatcherFactory(this));
}
MockFilePathWatcherShim* watcher_shim_;
bool fail_on_watch_;
MessageLoop* message_loop_;
scoped_ptr<WatchingFileReader> watcher_;
std::string breakpoint_;
};
TEST_F(WatchingFileReaderTest, FilePathWatcherFailures) {
fail_on_watch_ = true;
watcher_->StartWatch(FilePath(FILE_PATH_LITERAL("some_file_name")),
new MockWorker(this));
RunUntilBreak("OnWatch");
fail_on_watch_ = false;
RunUntilBreak("OnWatch"); // Due to backoff this will take 100ms.
RunUntilBreak("OnWork");
ASSERT_TRUE(watcher_shim_);
watcher_shim_->PathError();
RunUntilBreak("OnWatch");
RunUntilBreak("OnWork");
message_loop_->AssertIdle();
ASSERT_TRUE(watcher_shim_);
watcher_shim_->PathChanged();
RunUntilBreak("OnWork");
message_loop_->AssertIdle();
}
} // namespace
} // namespace net
|
