[scheduler] Teach scheduler about audio state

third_party/WebKit/Source/platform/scheduler/base/delayed_switch_unittest.cc

+// Copyright 2016 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 "platform/scheduler/base/delayed_switch.h"
+
+#include "base/test/simple_test_tick_clock.h"
+#include "cc/test/ordered_simple_task_runner.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using testing::ElementsAre;
+
+namespace blink {
+namespace scheduler {
+
+class DelayedSwitchTest : public testing::Test {
+  public:
+    DelayedSwitchTest() {}
+    ~DelayedSwitchTest() override {}
+
+    void SetUp() override {
+      clock_.reset(new base::SimpleTestTickClock());
+      mock_task_runner_ = make_scoped_refptr(
+          new cc::OrderedSimpleTaskRunner(clock_.get(), true));
+    }
+
+  protected:
+    std::unique_ptr<base::SimpleTestTickClock> clock_;
+    scoped_refptr<cc::OrderedSimpleTaskRunner> mock_task_runner_;
+
+    DISALLOW_COPY_AND_ASSIGN(DelayedSwitchTest);
+};
+
+namespace {
+
+void TestTask(std::vector<base::TimeTicks>* run_times,
+              base::SimpleTestTickClock* clock) {
+  run_times->push_back(clock->NowTicks());
+}
+
+};
+
+TEST_F(DelayedSwitchTest, TestDelayedSwitch) {
+  std::vector<base::TimeTicks> enable_run_times;
+  std::vector<base::TimeTicks> disable_run_times;
+
+  DelayedSwitch delayed_switch(
+      mock_task_runner_.get(),
+      base::TimeDelta::FromSeconds(1),
+      base::Bind(&TestTask, &enable_run_times, clock_.get()),
+      base::Bind(&TestTask, &disable_run_times, clock_.get()));
+
+  base::TimeTicks time_zero = clock_->NowTicks();
+
+  EXPECT_FALSE(delayed_switch.IsEnabled());
+
+  delayed_switch.Enable();
+
+  EXPECT_TRUE(delayed_switch.IsEnabled());
+
+  mock_task_runner_->RunUntilTime(time_zero + base::TimeDelta::FromMilliseconds(250));
+
+  EXPECT_TRUE(delayed_switch.IsEnabled());
+  // Subsequent calls to |Enable| should not produce additional calls
+  // to |enable_callback|.
+  delayed_switch.Enable();
+
+  mock_task_runner_->RunUntilTime(time_zero + base::TimeDelta::FromMilliseconds(500));
+
+  EXPECT_TRUE(delayed_switch.IsEnabled());
+  delayed_switch.Disable();
+  // |Disable| is scheduled, but not active yet.
+  EXPECT_TRUE(delayed_switch.IsEnabled());
+
+  mock_task_runner_->RunUntilTime(time_zero + base::TimeDelta::FromMilliseconds(1000));
+
+  EXPECT_TRUE(delayed_switch.IsEnabled());
+  // A call to |Disable| while one is scheduled should not do anything.
+  delayed_switch.Disable();
+  EXPECT_TRUE(delayed_switch.IsEnabled());
+
+  mock_task_runner_->RunUntilTime(time_zero + base::TimeDelta::FromMilliseconds(1600));
+
+  // At 1500 ms disable was activated after a call to |Disable| at 500 ms with
+  // 1 s delay.
+  EXPECT_FALSE(delayed_switch.IsEnabled());
+  delayed_switch.Enable();
+  EXPECT_TRUE(delayed_switch.IsEnabled());
+
+  mock_task_runner_->RunUntilTime(time_zero + base::TimeDelta::FromMilliseconds(2100));
+
+  // We scheduled a call to |Disable| at 1000 ms with 1 s delay.
+  // Make sure it has done nothing.
+  EXPECT_TRUE(delayed_switch.IsEnabled());
+
+  EXPECT_THAT(enable_run_times, ElementsAre(
+        time_zero,
+        time_zero + base::TimeDelta::FromMilliseconds(1600)));
+
+  EXPECT_THAT(disable_run_times, ElementsAre(
+        time_zero + base::TimeDelta::FromMilliseconds(1500)));
+}
+
+}  // namespace scheduler
+}  // namespace blink