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// Copyright (c) 2012 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/file_path_watcher_wrapper.h"
#include "base/bind.h"
#include "base/files/file_path_watcher.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace net {
namespace {
class FilePathWatcherWrapperTest : public testing::Test {
protected:
class MockFilePathWatcher : public base::files::FilePathWatcher {
public:
virtual bool Watch(const FilePath& path, Delegate* delegate) OVERRIDE {
DCHECK(!delegate_);
DCHECK(delegate);
path_ = path;
delegate_ = delegate;
return true;
}
void OnFilePathChanged() {
delegate_->OnFilePathChanged(path_);
}
void OnFilePathError() {
delegate_->OnFilePathError(path_);
}
private:
FilePath path_;
scoped_refptr<Delegate> delegate_;
};
class FailingFilePathWatcher : public MockFilePathWatcher {
public:
virtual bool Watch(const FilePath& path, Delegate* delegate) OVERRIDE {
MockFilePathWatcher::Watch(path, delegate);
return false;
}
};
// Class under test.
class TestFilePathWatcherWrapper : public FilePathWatcherWrapper {
public:
TestFilePathWatcherWrapper() : fail_on_watch_(false) {}
MockFilePathWatcher* file_path_watcher() {
return test_watcher_;
}
void set_fail_on_watch(bool value) {
fail_on_watch_ = value;
}
private:
virtual scoped_ptr<base::files::FilePathWatcher>
CreateFilePathWatcher() OVERRIDE {
test_watcher_ = fail_on_watch_ ? new FailingFilePathWatcher()
: new MockFilePathWatcher();
return scoped_ptr<base::files::FilePathWatcher>(test_watcher_);
}
MockFilePathWatcher* test_watcher_;
bool fail_on_watch_;
};
virtual void SetUp() OVERRIDE {
watcher_wrapper_.reset(new TestFilePathWatcherWrapper());
got_change_ = false;
}
bool Watch() {
return watcher_wrapper_->Watch(
FilePath(FILE_PATH_LITERAL("some_file_name")),
base::Bind(&FilePathWatcherWrapperTest::OnChange,
base::Unretained(this)));
}
void OnChange(bool succeeded) {
got_change_ = true;
last_result_ = succeeded;
}
scoped_ptr<TestFilePathWatcherWrapper> watcher_wrapper_;
bool got_change_;
bool last_result_;
};
TEST_F(FilePathWatcherWrapperTest, Basic) {
watcher_wrapper_->set_fail_on_watch(true);
EXPECT_FALSE(Watch());
EXPECT_FALSE(watcher_wrapper_->IsWatching());
EXPECT_FALSE(got_change_);
watcher_wrapper_->set_fail_on_watch(false);
EXPECT_TRUE(Watch());
EXPECT_TRUE(watcher_wrapper_->IsWatching());
EXPECT_FALSE(got_change_);
EXPECT_TRUE(Watch());
EXPECT_TRUE(watcher_wrapper_->IsWatching());
EXPECT_FALSE(got_change_);
watcher_wrapper_->file_path_watcher()->OnFilePathChanged();
EXPECT_TRUE(watcher_wrapper_->IsWatching());
EXPECT_TRUE(got_change_);
EXPECT_TRUE(last_result_);
got_change_ = false;
watcher_wrapper_->file_path_watcher()->OnFilePathError();
EXPECT_FALSE(watcher_wrapper_->IsWatching());
EXPECT_TRUE(got_change_);
EXPECT_FALSE(last_result_);
got_change_ = false;
EXPECT_TRUE(Watch());
EXPECT_TRUE(watcher_wrapper_->IsWatching());
EXPECT_FALSE(got_change_);
}
TEST_F(FilePathWatcherWrapperTest, Cancel) {
EXPECT_TRUE(Watch());
EXPECT_TRUE(watcher_wrapper_->IsWatching());
watcher_wrapper_->Cancel();
EXPECT_FALSE(watcher_wrapper_->IsWatching());
EXPECT_FALSE(got_change_);
EXPECT_TRUE(Watch());
EXPECT_TRUE(watcher_wrapper_->IsWatching());
}
} // namespace
} // namespace net
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