blob: 52fcce3a0b8fca71f8c8fd2995932f4618530917 [file] [log] [blame]
/*
* 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_util.h>
#include <base/files/scoped_temp_dir.h>
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include "metrics/c_metrics_library.h"
#include "metrics/metrics_library.h"
class MetricsLibraryTest : public testing::Test {
protected:
virtual void SetUp() {
ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
lib_.InitForTest(temp_dir_.path());
// Defeat metrics enabled caching between tests.
lib_.cached_enabled_time_ = 0;
}
void SetMetricsConsent(bool enabled) {
if (enabled) {
ASSERT_EQ(base::WriteFile(lib_.consent_file_, "", 0), 0);
} else {
ASSERT_TRUE(base::DeleteFile(lib_.consent_file_, false));
}
}
void VerifyEnabledCacheHit(bool to_value);
void VerifyEnabledCacheEviction(bool to_value);
MetricsLibrary lib_;
base::ScopedTempDir temp_dir_;
};
TEST_F(MetricsLibraryTest, AreMetricsEnabledFalse) {
SetMetricsConsent(false);
EXPECT_FALSE(lib_.AreMetricsEnabled());
}
TEST_F(MetricsLibraryTest, AreMetricsEnabledTrue) {
SetMetricsConsent(true);
EXPECT_TRUE(lib_.AreMetricsEnabled());
}
void MetricsLibraryTest::VerifyEnabledCacheHit(bool to_value) {
// We might step from one second to the next one time, but not 100
// times in a row.
for (int i = 0; i < 100; ++i) {
lib_.cached_enabled_time_ = 0;
SetMetricsConsent(to_value);
lib_.AreMetricsEnabled();
// If we check the metrics status twice in a row, we use the cached value
// the second time.
SetMetricsConsent(!to_value);
if (lib_.AreMetricsEnabled() == to_value)
return;
}
ADD_FAILURE() << "Did not see evidence of caching";
}
void MetricsLibraryTest::VerifyEnabledCacheEviction(bool to_value) {
lib_.cached_enabled_time_ = 0;
SetMetricsConsent(!to_value);
ASSERT_EQ(!to_value, lib_.AreMetricsEnabled());
SetMetricsConsent(to_value);
// Sleep one second (or cheat to be faster) and check that we are not using
// the cached value.
--lib_.cached_enabled_time_;
ASSERT_EQ(to_value, lib_.AreMetricsEnabled());
}
TEST_F(MetricsLibraryTest, AreMetricsEnabledCaching) {
VerifyEnabledCacheHit(false);
VerifyEnabledCacheHit(true);
VerifyEnabledCacheEviction(false);
VerifyEnabledCacheEviction(true);
}
TEST_F(MetricsLibraryTest, AreMetricsEnabledNoCaching) {
// disable caching.
lib_.use_caching_ = false;
// Checking the consent repeatedly should return the right result.
for (int i=0; i<100; ++i) {
SetMetricsConsent(true);
ASSERT_EQ(true, lib_.AreMetricsEnabled());
SetMetricsConsent(false);
ASSERT_EQ(false, lib_.AreMetricsEnabled());
}
}