Add V8 platform API to call delayed task.

test/unittests/libplatform/default-platform-unittest.cc

 // Copyright 2014 the V8 project 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 "src/libplatform/default-platform.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 using testing::InSequence;
 using testing::StrictMock;
 
 namespace v8 {
 namespace platform {
 
 namespace {
 
 struct MockTask : public Task {
   virtual ~MockTask() { Die(); }
   MOCK_METHOD0(Run, void());
   MOCK_METHOD0(Die, void());
 };
 
+
+class DefaultPlatformWithMockTime : public DefaultPlatform {
+ public:
+  DefaultPlatformWithMockTime() : time_(0) {}
+  double MonotonicallyIncreasingTime() override { return time_; }
+  void IncreaseTime(double seconds) { time_ += seconds; }
+
+ private:
+  double time_;
+};
+
 }  // namespace
 
 
 TEST(DefaultPlatformTest, PumpMessageLoop) {
   InSequence s;
 
   int dummy;
   Isolate* isolate = reinterpret_cast<Isolate*>(&dummy);
 
   DefaultPlatform platform;
   EXPECT_FALSE(platform.PumpMessageLoop(isolate));
 
   StrictMock<MockTask>* task = new StrictMock<MockTask>;
   platform.CallOnForegroundThread(isolate, task);
   EXPECT_CALL(*task, Run());
   EXPECT_CALL(*task, Die());
   EXPECT_TRUE(platform.PumpMessageLoop(isolate));
   EXPECT_FALSE(platform.PumpMessageLoop(isolate));
 }
 
+
+TEST(DefaultPlatformTest, PumpMessageLoopDelayed) {
+  InSequence s;
+
+  int dummy;
+  Isolate* isolate = reinterpret_cast<Isolate*>(&dummy);
+
+  DefaultPlatformWithMockTime platform;
+  EXPECT_FALSE(platform.PumpMessageLoop(isolate));
+
+  StrictMock<MockTask>* task1 = new StrictMock<MockTask>;
+  StrictMock<MockTask>* task2 = new StrictMock<MockTask>;
+  platform.CallDelayedOnForegroundThread(isolate, task2, 100);
+  platform.CallDelayedOnForegroundThread(isolate, task1, 10);
+
+  EXPECT_FALSE(platform.PumpMessageLoop(isolate));
+
+  platform.IncreaseTime(11);
+  EXPECT_CALL(*task1, Run());
+  EXPECT_CALL(*task1, Die());
+  EXPECT_TRUE(platform.PumpMessageLoop(isolate));
+
+  EXPECT_FALSE(platform.PumpMessageLoop(isolate));
+
+  platform.IncreaseTime(90);
+  EXPECT_CALL(*task2, Run());
+  EXPECT_CALL(*task2, Die());
+  EXPECT_TRUE(platform.PumpMessageLoop(isolate));
+}
+
+
+TEST(DefaultPlatformTest, PumpMessageLoopNoStarvation) {
+  InSequence s;
+
+  int dummy;
+  Isolate* isolate = reinterpret_cast<Isolate*>(&dummy);
+
+  DefaultPlatformWithMockTime platform;
+  EXPECT_FALSE(platform.PumpMessageLoop(isolate));
+
+  StrictMock<MockTask>* task1 = new StrictMock<MockTask>;
+  StrictMock<MockTask>* task2 = new StrictMock<MockTask>;
+  StrictMock<MockTask>* task3 = new StrictMock<MockTask>;
+  platform.CallOnForegroundThread(isolate, task1);
+  platform.CallDelayedOnForegroundThread(isolate, task2, 10);
+  platform.IncreaseTime(11);
+
+  EXPECT_CALL(*task1, Run());
+  EXPECT_CALL(*task1, Die());
+  EXPECT_TRUE(platform.PumpMessageLoop(isolate));
+
+  platform.CallOnForegroundThread(isolate, task3);
+
+  EXPECT_CALL(*task2, Run());
+  EXPECT_CALL(*task2, Die());
+  EXPECT_TRUE(platform.PumpMessageLoop(isolate));
+  EXPECT_CALL(*task3, Run());
+  EXPECT_CALL(*task3, Die());
+  EXPECT_TRUE(platform.PumpMessageLoop(isolate));
+}
+
 }  // namespace platform
 }  // namespace v8