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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/memory/swap_metrics_driver_impl.h"
#include <memory>
#include "base/memory/ptr_util.h"
#include "base/test/task_environment.h"
#include "base/threading/platform_thread.h"
#include "base/time/time.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace content {
namespace {
// A SwapMetricsDriver that mocks what a platform-dependent driver does, but
// with control over when it fails so we can test error conditions.
class MockSwapMetricsDriver : public SwapMetricsDriverImpl {
public:
MockSwapMetricsDriver(std::unique_ptr<Delegate> delegate,
const base::TimeDelta update_interval,
const bool fail_on_update)
: SwapMetricsDriverImpl(std::move(delegate), update_interval),
fail_on_update_(fail_on_update) {}
~MockSwapMetricsDriver() override = default;
protected:
SwapMetricsDriver::SwapMetricsUpdateResult UpdateMetricsInternal(
base::TimeDelta interval) override {
if (fail_on_update_)
return SwapMetricsDriver::SwapMetricsUpdateResult::
kSwapMetricsUpdateFailed;
if (interval.is_zero())
return SwapMetricsDriver::SwapMetricsUpdateResult::
kSwapMetricsUpdateSuccess;
delegate_->OnSwapInCount(0, interval);
delegate_->OnSwapOutCount(0, interval);
delegate_->OnDecompressedPageCount(0, interval);
delegate_->OnCompressedPageCount(0, interval);
return SwapMetricsDriver::SwapMetricsUpdateResult::
kSwapMetricsUpdateSuccess;
}
private:
bool fail_on_update_;
};
// A SwapMetricsDriver::Delegate that counts the number of updates for each
// metric.
class SwapMetricsDelegateCounter : public SwapMetricsDriver::Delegate {
public:
SwapMetricsDelegateCounter()
: num_swap_in_updates_(0),
num_swap_out_updates_(0),
num_decompressed_updates_(0),
num_compressed_updates_(0),
num_updates_failed_(0) {}
SwapMetricsDelegateCounter(const SwapMetricsDelegateCounter&) = delete;
SwapMetricsDelegateCounter& operator=(const SwapMetricsDelegateCounter&) =
delete;
~SwapMetricsDelegateCounter() override = default;
void OnSwapInCount(uint64_t count, base::TimeDelta interval) override {
++num_swap_in_updates_;
}
void OnSwapOutCount(uint64_t count, base::TimeDelta interval) override {
++num_swap_out_updates_;
}
void OnDecompressedPageCount(uint64_t count,
base::TimeDelta interval) override {
++num_decompressed_updates_;
}
void OnCompressedPageCount(uint64_t count,
base::TimeDelta interval) override {
++num_compressed_updates_;
}
void OnUpdateMetricsFailed() override { ++num_updates_failed_; }
size_t num_swap_in_updates() const { return num_swap_in_updates_; }
size_t num_swap_out_updates() const { return num_swap_out_updates_; }
size_t num_decompressed_updates() const { return num_decompressed_updates_; }
size_t num_compressed_updates() const { return num_compressed_updates_; }
size_t num_updates_failed() const { return num_updates_failed_; }
private:
size_t num_swap_in_updates_;
size_t num_swap_out_updates_;
size_t num_decompressed_updates_;
size_t num_compressed_updates_;
size_t num_updates_failed_;
};
// The time delta between updates must non-zero for the delegate callbacks to be
// invoked.
constexpr base::TimeDelta kUpdateDelay = base::Milliseconds(50);
} // namespace
class TestSwapMetricsDriver : public testing::Test {
public:
static std::unique_ptr<SwapMetricsDriver> CreateDriver(
const base::TimeDelta update_interval,
bool fail_on_update) {
SwapMetricsDelegateCounter* delegate = new SwapMetricsDelegateCounter();
return base::WrapUnique<SwapMetricsDriver>(new MockSwapMetricsDriver(
base::WrapUnique<SwapMetricsDriver::Delegate>(delegate),
update_interval, fail_on_update));
}
protected:
base::test::TaskEnvironment task_environment_;
};
TEST_F(TestSwapMetricsDriver, ExpectedMetricCounts) {
std::unique_ptr<SwapMetricsDriver> driver =
CreateDriver(base::TimeDelta(), false);
auto result = driver->InitializeMetrics();
EXPECT_EQ(
SwapMetricsDriver::SwapMetricsUpdateResult::kSwapMetricsUpdateSuccess,
result);
base::PlatformThread::Sleep(kUpdateDelay);
result = driver->UpdateMetrics();
EXPECT_EQ(
SwapMetricsDriver::SwapMetricsUpdateResult::kSwapMetricsUpdateSuccess,
result);
base::PlatformThread::Sleep(kUpdateDelay);
result = driver->UpdateMetrics();
EXPECT_EQ(
SwapMetricsDriver::SwapMetricsUpdateResult::kSwapMetricsUpdateSuccess,
result);
auto* delegate = static_cast<SwapMetricsDelegateCounter*>(
static_cast<SwapMetricsDriverImpl*>(driver.get())->delegate_.get());
EXPECT_EQ(2UL, delegate->num_swap_in_updates());
EXPECT_EQ(2UL, delegate->num_swap_out_updates());
EXPECT_EQ(2UL, delegate->num_decompressed_updates());
EXPECT_EQ(2UL, delegate->num_compressed_updates());
}
TEST_F(TestSwapMetricsDriver, TimerStartSuccess) {
std::unique_ptr<SwapMetricsDriver> driver =
CreateDriver(base::Seconds(60), false);
auto result = driver->Start();
EXPECT_EQ(
SwapMetricsDriver::SwapMetricsUpdateResult::kSwapMetricsUpdateSuccess,
result);
}
TEST_F(TestSwapMetricsDriver, TimerStartFail) {
std::unique_ptr<SwapMetricsDriver> driver =
CreateDriver(base::Seconds(60), true);
auto result = driver->Start();
EXPECT_EQ(
SwapMetricsDriver::SwapMetricsUpdateResult::kSwapMetricsUpdateFailed,
result);
}
TEST_F(TestSwapMetricsDriver, UpdateMetricsFail) {
std::unique_ptr<SwapMetricsDriver> driver =
CreateDriver(base::Seconds(60), true);
auto result = driver->InitializeMetrics();
EXPECT_EQ(
SwapMetricsDriver::SwapMetricsUpdateResult::kSwapMetricsUpdateFailed,
result);
result = driver->InitializeMetrics();
EXPECT_EQ(
SwapMetricsDriver::SwapMetricsUpdateResult::kSwapMetricsUpdateFailed,
result);
auto* delegate = static_cast<SwapMetricsDelegateCounter*>(
static_cast<SwapMetricsDriverImpl*>(driver.get())->delegate_.get());
EXPECT_EQ(2UL, delegate->num_updates_failed());
}
} // namespace content
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