Add support for idle tasks to the default platform

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());
 };
 
+struct MockIdleTask : public IdleTask {
+  virtual ~MockIdleTask() { Die(); }
+  MOCK_METHOD1(Run, void(double deadline_in_seconds));
+  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_;
 };
@@ skipping 87 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(&dummy);
 
   {
     DefaultPlatformWithMockTime platform;
     StrictMock<MockTask>* task = new StrictMock<MockTask>;
     platform.CallDelayedOnForegroundThread(isolate, task, 10);
     EXPECT_CALL(*task, Die());
   }
 }
 
+TEST(DefaultPlatformTest, RunIdleTasks) {
+  InSequence s;
+
+  int dummy;
+  Isolate* isolate = reinterpret_cast<Isolate*>(&dummy);
+
+  DefaultPlatformWithMockTime platform;
+
+  StrictMock<MockIdleTask>* task = new StrictMock<MockIdleTask>;
+  platform.CallIdleOnForegroundThread(isolate, task);
+  EXPECT_CALL(*task, Run(42.0 + 23.0));
+  EXPECT_CALL(*task, Die());
+  platform.IncreaseTime(23.0);
+  platform.RunIdleTasks(isolate, 42.0);
+}
+
+TEST(DefaultPlatformTest, PendingIdleTasksAreDestroyedOnShutdown) {
+  InSequence s;
+
+  int dummy;
+  Isolate* isolate = reinterpret_cast<Isolate*>(&dummy);
+
+  {
+    DefaultPlatformWithMockTime platform;
+    StrictMock<MockIdleTask>* task = new StrictMock<MockIdleTask>;
+    platform.CallIdleOnForegroundThread(isolate, task);
+    EXPECT_CALL(*task, Die());
+  }
+}
 
 }  // namespace platform
 }  // namespace v8