| /* |
| * Copyright 2016 Google Inc. All Rights Reserved. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "cobalt/bindings/testing/bindings_test_base.h" |
| #include "cobalt/bindings/testing/garbage_collection_test_interface.h" |
| |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace cobalt { |
| namespace bindings { |
| namespace testing { |
| |
| namespace { |
| typedef BindingsTestBase GarbageCollectionTest; |
| } // namespace |
| |
| TEST_F(GarbageCollectionTest, JSObjectHoldsReferenceToPlatformObject) { |
| EXPECT_EQ(GarbageCollectionTestInterface::instances().size(), 0); |
| EXPECT_TRUE( |
| EvaluateScript("var obj = new GarbageCollectionTestInterface();", NULL)); |
| |
| // Ensure that this is kept alive after GC is run. |
| EXPECT_EQ(GarbageCollectionTestInterface::instances().size(), 1); |
| CollectGarbage(); |
| EXPECT_EQ(GarbageCollectionTestInterface::instances().size(), 1); |
| |
| // Ensure that this is destroyed when there are no more references to it from |
| // JavaScript. |
| EXPECT_TRUE(EvaluateScript("var obj = undefined;", NULL)); |
| CollectGarbage(); |
| #if !defined(ENGINE_USES_CONSERVATIVE_ROOTING) |
| EXPECT_EQ(GarbageCollectionTestInterface::instances().size(), 0); |
| #endif |
| } |
| |
| TEST_F(GarbageCollectionTest, PreventGarbageCollection) { |
| EXPECT_EQ(GarbageCollectionTestInterface::instances().size(), 0); |
| EXPECT_TRUE( |
| EvaluateScript("var obj = new GarbageCollectionTestInterface();", NULL)); |
| |
| // Keep this instance alive using PreventGarbageCollection |
| ASSERT_EQ(GarbageCollectionTestInterface::instances().size(), 1); |
| global_environment_->PreventGarbageCollection( |
| make_scoped_refptr<script::Wrappable>( |
| GarbageCollectionTestInterface::instances()[0])); |
| // Remove the only reference to this object from JavaScript. |
| EXPECT_TRUE(EvaluateScript("var obj = undefined;", NULL)); |
| |
| // Ensure that the object is kept alive. |
| CollectGarbage(); |
| ASSERT_EQ(GarbageCollectionTestInterface::instances().size(), 1); |
| |
| // Allow this object to be garbage collected once more. |
| global_environment_->AllowGarbageCollection( |
| make_scoped_refptr<script::Wrappable>( |
| GarbageCollectionTestInterface::instances()[0])); |
| |
| // Ensure that the object is destroyed by garbage collection. |
| CollectGarbage(); |
| #if !defined(ENGINE_USES_CONSERVATIVE_ROOTING) |
| EXPECT_EQ(GarbageCollectionTestInterface::instances().size(), 0); |
| #endif |
| } |
| |
| TEST_F(GarbageCollectionTest, ReachableObjectsKeptAlive) { |
| // Build a linked-list structure. |
| EXPECT_EQ(GarbageCollectionTestInterface::instances().size(), 0); |
| EXPECT_TRUE(EvaluateScript( |
| "var head = new GarbageCollectionTestInterface();" |
| "head.next = new GarbageCollectionTestInterface();" |
| "head.next.next = new GarbageCollectionTestInterface();" |
| "head.next.next.next = new GarbageCollectionTestInterface();")); |
| ASSERT_EQ(GarbageCollectionTestInterface::instances().size(), 4); |
| |
| // A reference to anything in the list should keep the rest of the structure |
| // alive. |
| EXPECT_TRUE( |
| EvaluateScript("var tail = head.next.next.next;" |
| "var head = undefined;")); |
| CollectGarbage(); |
| ASSERT_EQ(GarbageCollectionTestInterface::instances().size(), 4); |
| |
| // The old tail is not reachable, so the nodes should get garbage collected. |
| EXPECT_TRUE( |
| EvaluateScript("var tail = tail.previous.previous;" |
| "tail.next = null;")); |
| CollectGarbage(); |
| #if !defined(ENGINE_USES_CONSERVATIVE_ROOTING) |
| ASSERT_EQ(GarbageCollectionTestInterface::instances().size(), 2); |
| #endif |
| } |
| |
| TEST_F(GarbageCollectionTest, JSObjectRetainsCustomProperty) { |
| // Build a linked-list structure. |
| EXPECT_EQ(GarbageCollectionTestInterface::instances().size(), 0); |
| EXPECT_TRUE(EvaluateScript( |
| "var head = new GarbageCollectionTestInterface();" |
| "head.next = new GarbageCollectionTestInterface();" |
| "head.next.next = new GarbageCollectionTestInterface();" |
| "head.next.next.next = new GarbageCollectionTestInterface();")); |
| ASSERT_EQ(GarbageCollectionTestInterface::instances().size(), 4); |
| |
| // Add a custom property to an object that is not directly reachable from JS. |
| EXPECT_TRUE(EvaluateScript("head.next.bicycle = 7;")); |
| |
| // Collect garbage and ensure that the custom property persisted. |
| CollectGarbage(); |
| std::string result; |
| EXPECT_TRUE(EvaluateScript("head.next.bicycle;", &result)); |
| EXPECT_STREQ("7", result.c_str()); |
| } |
| |
| } // namespace testing |
| } // namespace bindings |
| } // namespace cobalt |