First tests for GCIdleTimeHandler.

test/heap-unittests/heap-unittest.h

+// 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.
+
+#ifndef V8_HEAP_UNITTESTS_HEAP_UNITTEST_H_
+#define V8_HEAP_UNITTESTS_HEAP_UNITTEST_H_
+
+#include "src/heap/gc-idle-time-handler.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace v8 {
+namespace internal {
+
+class GCIdleTimeHandlerTest : public ::testing::Test {
+ public:
+  GCIdleTimeHandlerTest() {}
+  virtual ~GCIdleTimeHandlerTest() {}
+
+  GCIdleTimeHandler* handler() { return &handler_; }
+
+  GCIdleTimeHandler::HeapState initial_heap_state() {

[Hannes Payer (out of office), 2014/08/22 11:06:30]

Can we make a method InitializeHeapState that takes all possible configurations
as parameter? And call this function DefaultHeapState that calls
InitializeHeapState with the given default values.

+    GCIdleTimeHandler::HeapState result;
+    result.contexts_disposed = 0;
+    result.size_of_objects = kSizeOfObjects;
+    result.incremental_marking_stopped = false;
+    result.can_start_incremental_marking = true;
+    result.mark_compact_speed_in_bytes_per_ms = kMarkCompactSpeed;
+    result.incremental_marking_speed_in_bytes_per_ms = kMarkingSpeed;
+    return result;
+  }
+
+  static const size_t kSizeOfObjects = 100 * MB;
+  static const size_t kMarkCompactSpeed = 100 * KB;
+  static const size_t kMarkingSpeed = 100 * KB;
+
+ private:
+  GCIdleTimeHandler handler_;
+};
+}
+}
+#endif  // V8_HEAP_UNITTESTS_HEAP_UNITTEST_H_