blob: 2c992a9875f748beac25963c52d1697d1bb7be04 [file] [log] [blame]
/*
* 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