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/*
* Copyright (C) 2015 The Android Open Source Project
*
* 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.
*/
#include <base/files/file_path.h>
#include <base/files/file_util.h>
#include <base/files/scoped_temp_dir.h>
#include <base/logging.h>
#include <base/macros.h>
#include <binder/IBinder.h>
#include <binderwrapper/binder_test_base.h>
#include <binderwrapper/stub_binder_wrapper.h>
#include "wake_lock_manager.h"
namespace android {
class WakeLockManagerTest : public BinderTestBase {
public:
WakeLockManagerTest() {
CHECK(temp_dir_.CreateUniqueTempDir());
lock_path_ = temp_dir_.path().Append("lock");
unlock_path_ = temp_dir_.path().Append("unlock");
ClearFiles();
manager_.set_paths_for_testing(lock_path_, unlock_path_);
CHECK(manager_.Init());
}
~WakeLockManagerTest() override = default;
protected:
// Returns the contents of |path|.
std::string ReadFile(const base::FilePath& path) const {
std::string value;
CHECK(base::ReadFileToString(path, &value));
return value;
}
// Clears |lock_path_| and |unlock_path_|.
void ClearFiles() {
CHECK(base::WriteFile(lock_path_, "", 0) == 0);
CHECK(base::WriteFile(unlock_path_, "", 0) == 0);
}
base::ScopedTempDir temp_dir_;
// Files within |temp_dir_| simulating /sys/power/wake_lock and wake_unlock.
base::FilePath lock_path_;
base::FilePath unlock_path_;
WakeLockManager manager_;
private:
DISALLOW_COPY_AND_ASSIGN(WakeLockManagerTest);
};
TEST_F(WakeLockManagerTest, AddAndRemoveRequests) {
// A kernel wake lock should be created for the first request.
sp<BBinder> binder1 = binder_wrapper()->CreateLocalBinder();
EXPECT_TRUE(manager_.AddRequest(binder1, "1", "1", -1));
EXPECT_EQ(WakeLockManager::kLockName, ReadFile(lock_path_));
EXPECT_EQ("", ReadFile(unlock_path_));
// Nothing should happen when a second request is made.
ClearFiles();
sp<BBinder> binder2 = binder_wrapper()->CreateLocalBinder();
EXPECT_TRUE(manager_.AddRequest(binder2, "2", "2", -1));
EXPECT_EQ("", ReadFile(lock_path_));
EXPECT_EQ("", ReadFile(unlock_path_));
// The wake lock should still be held after the first request is withdrawn.
ClearFiles();
EXPECT_TRUE(manager_.RemoveRequest(binder1));
EXPECT_EQ("", ReadFile(lock_path_));
EXPECT_EQ("", ReadFile(unlock_path_));
// When there are no more requests, the wake lock should be released.
ClearFiles();
EXPECT_TRUE(manager_.RemoveRequest(binder2));
EXPECT_EQ("", ReadFile(lock_path_));
EXPECT_EQ(WakeLockManager::kLockName, ReadFile(unlock_path_));
}
TEST_F(WakeLockManagerTest, DuplicateRequest) {
sp<BBinder> binder = binder_wrapper()->CreateLocalBinder();
EXPECT_TRUE(manager_.AddRequest(binder, "foo", "bar", -1));
EXPECT_EQ(WakeLockManager::kLockName, ReadFile(lock_path_));
EXPECT_EQ("", ReadFile(unlock_path_));
// Send a second request using the same binder and check a new wake lock isn't
// created.
ClearFiles();
EXPECT_TRUE(manager_.AddRequest(binder, "a", "b", -1));
EXPECT_EQ("", ReadFile(lock_path_));
EXPECT_EQ("", ReadFile(unlock_path_));
ClearFiles();
EXPECT_TRUE(manager_.RemoveRequest(binder));
EXPECT_EQ("", ReadFile(lock_path_));
EXPECT_EQ(WakeLockManager::kLockName, ReadFile(unlock_path_));
}
TEST_F(WakeLockManagerTest, InvalidRemoval) {
// Trying to remove an unknown binder should fail and not do anything.
sp<BBinder> binder = binder_wrapper()->CreateLocalBinder();
EXPECT_FALSE(manager_.RemoveRequest(binder));
EXPECT_EQ("", ReadFile(lock_path_));
EXPECT_EQ("", ReadFile(unlock_path_));
}
TEST_F(WakeLockManagerTest, BinderDeath) {
sp<BBinder> binder = binder_wrapper()->CreateLocalBinder();
EXPECT_TRUE(manager_.AddRequest(binder, "foo", "bar", -1));
EXPECT_EQ(WakeLockManager::kLockName, ReadFile(lock_path_));
EXPECT_EQ("", ReadFile(unlock_path_));
// If the binder dies, the wake lock should be released.
ClearFiles();
binder_wrapper()->NotifyAboutBinderDeath(binder);
EXPECT_EQ("", ReadFile(lock_path_));
EXPECT_EQ(WakeLockManager::kLockName, ReadFile(unlock_path_));
// Check that a new request can be created using the same binder.
ClearFiles();
EXPECT_TRUE(manager_.AddRequest(binder, "foo", "bar", -1));
EXPECT_EQ(WakeLockManager::kLockName, ReadFile(lock_path_));
EXPECT_EQ("", ReadFile(unlock_path_));
}
} // namespace android
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