(reland) Adds TimeDomains to the TaskQueueManager

components/scheduler/base/time_domain_unittest.cc

Index: components/scheduler/base/time_domain_unittest.cc
diff --git a/components/scheduler/base/time_domain_unittest.cc b/components/scheduler/base/time_domain_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..88328c098f1ce6b2a853c769361e22cf29e750ed
--- /dev/null
+++ b/components/scheduler/base/time_domain_unittest.cc
@@ -0,0 +1,210 @@
+// Copyright 2015 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 "components/scheduler/base/time_domain.h"
+
+#include "base/test/simple_test_tick_clock.h"
+#include "cc/test/ordered_simple_task_runner.h"
+#include "components/scheduler/base/task_queue_impl.h"
+#include "components/scheduler/base/task_queue_manager.h"
+#include "components/scheduler/base/task_queue_manager_delegate.h"
+#include "components/scheduler/base/task_queue_manager_delegate_for_test.h"
+#include "components/scheduler/base/test_time_source.h"
+#include "testing/gmock/include/gmock/gmock.h"
+
+using testing::_;
+
+namespace scheduler {
+
+class FakeTaskQueueManagerDelegate : public TaskQueueManagerDelegate {
+ public:
+  FakeTaskQueueManagerDelegate() : belongs_to_current_thread_(true) {}
+
+  MOCK_METHOD3(PostDelayedTask,
+               bool(const tracked_objects::Location& from_here,
+                    const base::Closure& task,
+                    base::TimeDelta dela));
+  MOCK_METHOD3(PostNonNestableDelayedTask,
+               bool(const tracked_objects::Location& from_here,
+                    const base::Closure& task,
+                    base::TimeDelta dela));
+
+  base::TimeTicks NowTicks() override {
+    NOTREACHED();
+    return base::TimeTicks();
+  }
+
+  bool IsNested() const override {
+    NOTREACHED();
+    return false;
+  }
+
+  void OnNoMoreImmediateWork() override { NOTREACHED(); }
+
+  double CurrentTimeSeconds() const override {
+    NOTREACHED();
+    return 0.0;
+  }
+
+  void SetBelongsToCurrentThread(bool belongs_to_current_thread) {
+    belongs_to_current_thread_ = belongs_to_current_thread;
+  }
+
+  bool RunsTasksOnCurrentThread() const override {
+    return belongs_to_current_thread_;
+  }
+
+ private:
+  ~FakeTaskQueueManagerDelegate() override {}
+
+  bool belongs_to_current_thread_;
+};
+
+class MockTimeDomain : public TimeDomain {
+ public:
+  MockTimeDomain(TaskQueueManagerDelegate* delegate)
+      : TimeDomain(delegate),
+        now_(base::TimeTicks() + base::TimeDelta::FromSeconds(1)) {}
+
+  using TimeDomain::NextScheduledRunTime;
+  using TimeDomain::NextScheduledTaskQueue;
+  using TimeDomain::ScheduleDelayedWork;
+  using TimeDomain::UnregisterQueue;
+  using TimeDomain::UpdateWorkQueues;
+
+  // TimeSource implementation:
+  LazyNow GetLazyNow() override { return LazyNow(now_); }
+
+  void AsValueIntoInternal(
+      base::trace_event::TracedValue* state) const override {}
+
+  bool MaybeAdvanceTime() override { return false; }
+
+  MOCK_METHOD1(ScheduleDoWork, void(base::TimeDelta delay));
+
+  void SetNow(base::TimeTicks now) { now_ = now; }
+
+  base::TimeTicks Now() const { return now_; }
+
+ private:
+  base::TimeTicks now_;
+
+  ~MockTimeDomain() override {}
+
+  DISALLOW_COPY_AND_ASSIGN(MockTimeDomain);
+};
+
+class TimeDomainTest : public testing::Test {
+ public:
+  void SetUp() final {
+    delegate_ = make_scoped_refptr(new FakeTaskQueueManagerDelegate);
+    time_domain_ = make_scoped_refptr(new MockTimeDomain(delegate_.get()));
+    task_queue_ = make_scoped_refptr(new internal::TaskQueueImpl(
+        nullptr, time_domain_, TaskQueue::Spec("test_queue"), "test.category",
+        "test.category"));
+  }
+
+  scoped_refptr<FakeTaskQueueManagerDelegate> delegate_;
+  scoped_refptr<MockTimeDomain> time_domain_;
+  scoped_refptr<internal::TaskQueueImpl> task_queue_;
+};
+
+TEST_F(TimeDomainTest, ScheduleDelayedWork_SameThread) {
+  base::TimeDelta delay = base::TimeDelta::FromMilliseconds(10);
+  base::TimeTicks delayed_runtime = time_domain_->Now() + delay;
+  EXPECT_CALL(*time_domain_.get(), ScheduleDoWork(delay));
+  LazyNow lazy_now = time_domain_->GetLazyNow();
+  time_domain_->ScheduleDelayedWork(task_queue_.get(),
+                                    time_domain_->Now() + delay, &lazy_now);
+
+  base::TimeTicks next_scheduled_runtime;
+  EXPECT_TRUE(time_domain_->NextScheduledRunTime(&next_scheduled_runtime));
+  EXPECT_EQ(delayed_runtime, next_scheduled_runtime);
+
+  TaskQueue* next_task_queue;
+  EXPECT_TRUE(time_domain_->NextScheduledTaskQueue(&next_task_queue));
+  EXPECT_EQ(task_queue_.get(), next_task_queue);
+}
+
+TEST_F(TimeDomainTest, ScheduleDelayedWork_DifferentThread) {
+  delegate_->SetBelongsToCurrentThread(false);
+
+  base::TimeDelta delay = base::TimeDelta::FromMilliseconds(10);
+  base::TimeTicks delayed_runtime = time_domain_->Now() + delay;
+
+  EXPECT_CALL(*delegate_.get(), PostDelayedTask(_, _, base::TimeDelta()));
+  LazyNow lazy_now = time_domain_->GetLazyNow();
+  time_domain_->ScheduleDelayedWork(task_queue_.get(), delayed_runtime,
+                                    &lazy_now);
+
+  base::TimeTicks next_scheduled_runtime;
+  EXPECT_FALSE(time_domain_->NextScheduledRunTime(&next_scheduled_runtime));
+}
+
+TEST_F(TimeDomainTest, UnregisterQueue) {
+  scoped_refptr<internal::TaskQueueImpl> task_queue2_ =
+      make_scoped_refptr(new internal::TaskQueueImpl(
+          nullptr, time_domain_, TaskQueue::Spec("test_queue2"),
+          "test.category", "test.category"));
+
+  EXPECT_CALL(*time_domain_.get(), ScheduleDoWork(_)).Times(2);
+  LazyNow lazy_now = time_domain_->GetLazyNow();
+  time_domain_->ScheduleDelayedWork(
+      task_queue_.get(),
+      time_domain_->Now() + base::TimeDelta::FromMilliseconds(10), &lazy_now);
+  time_domain_->ScheduleDelayedWork(
+      task_queue2_.get(),
+      time_domain_->Now() + base::TimeDelta::FromMilliseconds(100), &lazy_now);
+
+  TaskQueue* next_task_queue;
+  EXPECT_TRUE(time_domain_->NextScheduledTaskQueue(&next_task_queue));
+  EXPECT_EQ(task_queue_.get(), next_task_queue);
+
+  time_domain_->UnregisterQueue(task_queue_.get());
+  EXPECT_TRUE(time_domain_->NextScheduledTaskQueue(&next_task_queue));
+  EXPECT_EQ(task_queue2_.get(), next_task_queue);
+
+  time_domain_->UnregisterQueue(task_queue2_.get());
+  EXPECT_FALSE(time_domain_->NextScheduledTaskQueue(&next_task_queue));
+}
+
+TEST_F(TimeDomainTest, WakeupReadyDelayedQueues) {
+  scoped_refptr<MockTimeDomain> dummy_delegate(
+      new MockTimeDomain(delegate_.get()));
+  base::SimpleTestTickClock dummy_time_source;
+  scoped_refptr<cc::OrderedSimpleTaskRunner> dummy_task_runner(
+      new cc::OrderedSimpleTaskRunner(&dummy_time_source, false));
+  TaskQueueManager task_queue_manager(
+      TaskQueueManagerDelegateForTest::Create(
+          dummy_task_runner,
+          make_scoped_ptr(new TestTimeSource(&dummy_time_source))),
+      "test.scheduler", "test.scheduler", "scheduler.debug");
+  scoped_refptr<internal::TaskQueueImpl> dummy_queue =
+      task_queue_manager.NewTaskQueue(TaskQueue::Spec("test_queue"));
+
+  // Post a delayed task on |dummy_queue| and advance the queue's clock so that
+  // next time MoveReadyDelayedTasksToIncomingQueue is called, the task will
+  // get moved onto the incomming queue.
+  base::TimeDelta dummy_delay = base::TimeDelta::FromMilliseconds(10);
+  dummy_queue->PostDelayedTask(FROM_HERE, base::Closure(), dummy_delay);
+  dummy_time_source.Advance(dummy_delay);
+
+  // Now we can test that WakeupReadyDelayedQueues triggers calls to
+  // MoveReadyDelayedTasksToIncomingQueue as expected.
+  base::TimeDelta delay = base::TimeDelta::FromMilliseconds(50);
+  base::TimeTicks delayed_runtime = time_domain_->Now() + delay;
+  EXPECT_CALL(*time_domain_.get(), ScheduleDoWork(delay));
+  LazyNow lazy_now = time_domain_->GetLazyNow();
+  time_domain_->ScheduleDelayedWork(dummy_queue.get(), delayed_runtime,
+                                    &lazy_now);
+
+  time_domain_->UpdateWorkQueues(false, nullptr);
+  EXPECT_EQ(0UL, dummy_queue->IncomingQueueSizeForTest());
+
+  time_domain_->SetNow(delayed_runtime);
+  time_domain_->UpdateWorkQueues(false, nullptr);
+  EXPECT_EQ(1UL, dummy_queue->IncomingQueueSizeForTest());
+}
+
+}  // namespace scheduler