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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/bindings/core/v8/script_evaluation_result.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_binding_for_testing.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/core/script/classic_script.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string_table.h"
namespace blink {
class V8ElementTest : public BindingTestSupportingGC {
protected:
void SetUp() override {
// Precondition: test strings should not be in the AtomicStringTable yet.
DCHECK(AtomicStringTable::Instance()
.WeakFindForTesting("test-attribute")
.IsNull());
DCHECK(AtomicStringTable::Instance()
.WeakFindForTesting("test-value")
.IsNull());
}
void TearDown() override {
PreciselyCollectGarbage();
// Postcondition: test strings should have been released from the
// AtomicStringTable
DCHECK(AtomicStringTable::Instance()
.WeakFindForTesting("test-attribute")
.IsNull());
DCHECK(AtomicStringTable::Instance()
.WeakFindForTesting("test-value")
.IsNull());
}
};
v8::Local<v8::Value> Eval(const String& source, V8TestingScope& scope) {
return ClassicScript::CreateUnspecifiedScript(source)
->RunScriptAndReturnValue(&scope.GetWindow())
.GetSuccessValueOrEmpty();
}
TEST_F(V8ElementTest, SetAttributeOperationCallback) {
V8TestingScope scope;
Eval("document.body.setAttribute('test-attribute', 'test-value')", scope);
EXPECT_FALSE(AtomicStringTable::Instance()
.WeakFindForTesting("test-attribute")
.IsNull());
EXPECT_FALSE(
AtomicStringTable::Instance().WeakFindForTesting("test-value").IsNull());
#if DCHECK_IS_ON()
AtomicString test_attribute("test-attribute");
EXPECT_EQ(test_attribute.Impl()->RefCountChangeCountForTesting(), 8u);
AtomicString test_value("test-value");
EXPECT_EQ(test_value.Impl()->RefCountChangeCountForTesting(), 6u);
#endif
// Trigger a low memory notification. This will signal V8 to clear its
// CompilationCache, which is needed because cached compiled code may be
// holding references to externalized AtomicStrings.
scope.GetIsolate()->LowMemoryNotification();
}
TEST_F(V8ElementTest, GetAttributeOperationCallback_NonExisting) {
V8TestingScope scope;
Eval("document.body.getAttribute('test-attribute')", scope);
EXPECT_FALSE(AtomicStringTable::Instance()
.WeakFindForTesting("test-attribute")
.IsNull());
EXPECT_TRUE(
AtomicStringTable::Instance().WeakFindForTesting("test-value").IsNull());
#if DCHECK_IS_ON()
AtomicString test_attribute("test-attribute");
EXPECT_EQ(test_attribute.Impl()->RefCountChangeCountForTesting(), 5u);
#endif
// Trigger a low memory notification. This will signal V8 to clear its
// CompilationCache, which is needed because cached compiled code may be
// holding references to externalized AtomicStrings.
scope.GetIsolate()->LowMemoryNotification();
}
TEST_F(V8ElementTest, GetAttributeOperationCallback_Existing) {
V8TestingScope scope;
Eval("document.body.setAttribute('test-attribute', 'test-value')", scope);
EXPECT_FALSE(AtomicStringTable::Instance()
.WeakFindForTesting("test-attribute")
.IsNull());
EXPECT_FALSE(
AtomicStringTable::Instance().WeakFindForTesting("test-value").IsNull());
#if DCHECK_IS_ON()
AtomicString test_attribute("test-attribute");
test_attribute.Impl()->ResetRefCountChangeCountForTesting();
AtomicString test_value("test-value");
test_value.Impl()->ResetRefCountChangeCountForTesting();
#endif
Eval("document.body.getAttribute('test-attribute')", scope);
#if DCHECK_IS_ON()
EXPECT_EQ(test_attribute.Impl()->RefCountChangeCountForTesting(), 4u);
EXPECT_EQ(test_value.Impl()->RefCountChangeCountForTesting(), 2u);
#endif
// Trigger a low memory notification. This will signal V8 to clear its
// CompilationCache, which is needed because cached compiled code may be
// holding references to externalized AtomicStrings.
scope.GetIsolate()->LowMemoryNotification();
}
} // namespace blink
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