Delete athena/

athena/resource_manager/memory_pressure_notifier_unittest.cc

-/// Copyright 2014 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 "athena/resource_manager/memory_pressure_notifier.h"
-#include "athena/resource_manager/public/resource_manager_delegate.h"
-#include "athena/test/base/athena_test_base.h"
-
-namespace athena {
-namespace test {
-
-namespace {
-
-// Our OS delegate abstraction class to override the memory fill level.
-class TestResourceManagerDelegate : public ResourceManagerDelegate {
- public:
-  TestResourceManagerDelegate() : memory_fill_level_percent_(0) {}
-  ~TestResourceManagerDelegate() override {}
-
-  virtual int GetUsedMemoryInPercent() override {
-    timer_called_++;
-    return memory_fill_level_percent_;
-  }
-
-  virtual int MemoryPressureIntervalInMS() override {
-    return 5;
-  }
-
-  void set_memory_fill_level_percent(int memory_fill_level_percent) {
-    memory_fill_level_percent_ = memory_fill_level_percent;
-  }
-
-  // Returns the number of timer calls to the GetMemoryInPercent() calls.
-  int timer_called() { return timer_called_; }
-
- private:
-  // The to be returned memory fill level value in percent.
-  int memory_fill_level_percent_;
-
-  // How often was the timer calling the GetUsedMemoryInPercent() function.
-  int timer_called_;
-
-  DISALLOW_COPY_AND_ASSIGN(TestResourceManagerDelegate);
-};
-
-// Our memory pressure observer class.
-class TestMemoryPressureObserver : public MemoryPressureObserver {
- public:
-  TestMemoryPressureObserver(ResourceManagerDelegate* delegate)
-      : delegate_(delegate),
-        number_of_calls_(0),
-        pressure_(ResourceManager::MEMORY_PRESSURE_UNKNOWN) {}
-  ~TestMemoryPressureObserver() override {}
-
-  // The observer.
-  virtual void OnMemoryPressure(
-      ResourceManager::MemoryPressure pressure) override {
-    number_of_calls_++;
-    pressure_ = pressure;
-  }
-
-  virtual ResourceManagerDelegate* GetDelegate() override {
-    return delegate_.get();
-  }
-
-  int number_of_calls() { return number_of_calls_; }
-  ResourceManager::MemoryPressure pressure() { return pressure_; }
-
- private:
-  scoped_ptr<ResourceManagerDelegate> delegate_;
-
-  // Number of calls received.
-  int number_of_calls_;
-
-  // Last posted memory pressure.
-  ResourceManager::MemoryPressure pressure_;
-
-  DISALLOW_COPY_AND_ASSIGN(TestMemoryPressureObserver);
-};
-
-}  // namespace
-
-// Our testing base.
-class MemoryPressureTest : public AthenaTestBase {
- public:
-  MemoryPressureTest() : test_resource_manager_delegate_(nullptr) {}
-  ~MemoryPressureTest() override {}
-
-  // AthenaTestBase:
-  virtual void SetUp() override {
-    AthenaTestBase::SetUp();
-    // Create and install our TestAppContentDelegate with instrumentation.
-    test_resource_manager_delegate_ =
-        new TestResourceManagerDelegate();
-    test_memory_pressure_observer_.reset(new TestMemoryPressureObserver(
-        test_resource_manager_delegate_));
-    memory_pressure_notifier_.reset(
-        new MemoryPressureNotifier(test_memory_pressure_observer_.get()));
-  }
-
-  virtual void TearDown() override {
-    memory_pressure_notifier_.reset();
-    RunAllPendingInMessageLoop();
-    test_memory_pressure_observer_.reset();
-    AthenaTestBase::TearDown();
-  }
-
- protected:
-  TestResourceManagerDelegate* test_resource_manager_delegate() {
-    return test_resource_manager_delegate_;
-  }
-
-  TestMemoryPressureObserver* test_memory_pressure_observer() {
-    return test_memory_pressure_observer_.get();
-  }
-
-  // Waits until a timer interrupt occurs. Returns false if no timer is
-  // registered.
-  bool WaitForTimer() {
-    int first_counter = test_resource_manager_delegate()->timer_called();
-    // Wait up to 500ms for any poll on our memory status function from the
-    // MemoryPressureNotifier.
-    for (int i = 0; i < 500; ++i) {
-      if (test_resource_manager_delegate()->timer_called() != first_counter)
-        return true;
-      usleep(1);
-      RunAllPendingInMessageLoop();
-    }
-    return false;
-  }
-
- private:
-  // Not owned: the resource manager delegate.
-  TestResourceManagerDelegate* test_resource_manager_delegate_;
-  scoped_ptr<TestMemoryPressureObserver> test_memory_pressure_observer_;
-  scoped_ptr<MemoryPressureNotifier> memory_pressure_notifier_;
-  DISALLOW_COPY_AND_ASSIGN(MemoryPressureTest);
-};
-
-// Only creates and destroys it to see that the system gets properly shut down.
-TEST_F(MemoryPressureTest, SimpleTest) {
-}
-
-// Test that we get only a single call while the memory pressure is low.
-TEST_F(MemoryPressureTest, OneEventOnLowPressure) {
-  ASSERT_TRUE(WaitForTimer());
-  // No call should have happened at this time to the
-  EXPECT_FALSE(test_memory_pressure_observer()->number_of_calls());
-  // Set to something below 50% and check that we still get no call.
-  test_resource_manager_delegate()->set_memory_fill_level_percent(49);
-  ASSERT_TRUE(WaitForTimer());
-  EXPECT_EQ(1, test_memory_pressure_observer()->number_of_calls());
-  EXPECT_EQ(ResourceManager::MEMORY_PRESSURE_LOW,
-            test_memory_pressure_observer()->pressure());
-  ASSERT_TRUE(WaitForTimer());
-  EXPECT_EQ(1, test_memory_pressure_observer()->number_of_calls());
-  EXPECT_EQ(ResourceManager::MEMORY_PRESSURE_LOW,
-            test_memory_pressure_observer()->pressure());
-}
-
-// Test that we get a |MEMORY_PRESSURE_UNKNOWN| if it cannot be determined.
-TEST_F(MemoryPressureTest, TestNoCallsOnMemoryPressureUnknown) {
-  test_resource_manager_delegate()->set_memory_fill_level_percent(0);
-  ASSERT_TRUE(WaitForTimer());
-  // We shouldn't have gotten a single call.
-  EXPECT_FALSE(test_memory_pressure_observer()->number_of_calls());
-  // And the memory pressure should be unknown.
-  EXPECT_EQ(ResourceManager::MEMORY_PRESSURE_UNKNOWN,
-            test_memory_pressure_observer()->pressure());
-}
-
-// Test that we get a change to MODERATE if the memory pressure is at 60%.
-TEST_F(MemoryPressureTest, TestModeratePressure) {
-  test_resource_manager_delegate()->set_memory_fill_level_percent(60);
-  ASSERT_TRUE(WaitForTimer());
-  // At least one call should have happened.
-  int calls = test_memory_pressure_observer()->number_of_calls();
-  EXPECT_TRUE(calls);
-  EXPECT_EQ(ResourceManager::MEMORY_PRESSURE_MODERATE,
-            test_memory_pressure_observer()->pressure());
-  // Even if the value does not change, we should get more calls.
-  ASSERT_TRUE(WaitForTimer());
-  EXPECT_LT(calls, test_memory_pressure_observer()->number_of_calls());
-  EXPECT_EQ(ResourceManager::MEMORY_PRESSURE_MODERATE,
-            test_memory_pressure_observer()->pressure());
-}
-
-// Test that increasing and decreasing the memory pressure does the right thing.
-TEST_F(MemoryPressureTest, TestPressureUpAndDown) {
-  test_resource_manager_delegate()->set_memory_fill_level_percent(60);
-  ASSERT_TRUE(WaitForTimer());
-  // At least one call should have happened.
-  int calls1 = test_memory_pressure_observer()->number_of_calls();
-  EXPECT_TRUE(calls1);
-  EXPECT_EQ(ResourceManager::MEMORY_PRESSURE_MODERATE,
-            test_memory_pressure_observer()->pressure());
-
-  // Check to the next level.
-  test_resource_manager_delegate()->set_memory_fill_level_percent(80);
-  ASSERT_TRUE(WaitForTimer());
-  int calls2 = test_memory_pressure_observer()->number_of_calls();
-  EXPECT_LT(calls1, calls2);
-  EXPECT_EQ(ResourceManager::MEMORY_PRESSURE_HIGH,
-            test_memory_pressure_observer()->pressure());
-
-  // Check to no pressure again.
-  test_resource_manager_delegate()->set_memory_fill_level_percent(20);
-  ASSERT_TRUE(WaitForTimer());
-  int calls3 = test_memory_pressure_observer()->number_of_calls();
-  EXPECT_LT(calls2, calls3);
-  EXPECT_EQ(ResourceManager::MEMORY_PRESSURE_LOW,
-            test_memory_pressure_observer()->pressure());
-
-  // Even if the value does not change, we should not get any more calls.
-  ASSERT_TRUE(WaitForTimer());
-  EXPECT_EQ(calls3, test_memory_pressure_observer()->number_of_calls());
-  EXPECT_EQ(ResourceManager::MEMORY_PRESSURE_LOW,
-            test_memory_pressure_observer()->pressure());
-}
-
-}  // namespace test
-}  // namespace athena