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// Copyright 2014 The Chromium 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 <stdint.h>
#include "base/logging.h"
#include "base/macros.h"
#include "gin/arguments.h"
#include "gin/handle.h"
#include "gin/interceptor.h"
#include "gin/object_template_builder.h"
#include "gin/per_isolate_data.h"
#include "gin/public/isolate_holder.h"
#include "gin/test/v8_test.h"
#include "gin/try_catch.h"
#include "gin/wrappable.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "v8/include/v8-util.h"
namespace gin {
class MyInterceptor : public Wrappable<MyInterceptor>,
public NamedPropertyInterceptor,
public IndexedPropertyInterceptor {
public:
static WrapperInfo kWrapperInfo;
static gin::Handle<MyInterceptor> Create(v8::Isolate* isolate) {
return CreateHandle(isolate, new MyInterceptor(isolate));
}
int value() const { return value_; }
void set_value(int value) { value_ = value; }
// gin::NamedPropertyInterceptor
v8::Local<v8::Value> GetNamedProperty(v8::Isolate* isolate,
const std::string& property) override {
if (property == "value") {
return ConvertToV8(isolate, value_);
} else if (property == "func") {
return GetFunctionTemplate(isolate, "func")->GetFunction();
} else {
return v8::Local<v8::Value>();
}
}
bool SetNamedProperty(v8::Isolate* isolate,
const std::string& property,
v8::Local<v8::Value> value) override {
if (property == "value") {
ConvertFromV8(isolate, value, &value_);
return true;
}
return false;
}
std::vector<std::string> EnumerateNamedProperties(
v8::Isolate* isolate) override {
std::vector<std::string> result;
result.push_back("func");
result.push_back("value");
return result;
}
// gin::IndexedPropertyInterceptor
v8::Local<v8::Value> GetIndexedProperty(v8::Isolate* isolate,
uint32_t index) override {
if (index == 0)
return ConvertToV8(isolate, value_);
return v8::Local<v8::Value>();
}
bool SetIndexedProperty(v8::Isolate* isolate,
uint32_t index,
v8::Local<v8::Value> value) override {
if (index == 0) {
ConvertFromV8(isolate, value, &value_);
return true;
}
// Don't allow bypassing the interceptor.
return true;
}
std::vector<uint32_t> EnumerateIndexedProperties(
v8::Isolate* isolate) override {
std::vector<uint32_t> result;
result.push_back(0);
return result;
}
private:
explicit MyInterceptor(v8::Isolate* isolate)
: NamedPropertyInterceptor(isolate, this),
IndexedPropertyInterceptor(isolate, this),
value_(0),
template_cache_(isolate) {}
~MyInterceptor() override {}
// gin::Wrappable
ObjectTemplateBuilder GetObjectTemplateBuilder(
v8::Isolate* isolate) override {
return Wrappable<MyInterceptor>::GetObjectTemplateBuilder(isolate)
.AddNamedPropertyInterceptor()
.AddIndexedPropertyInterceptor();
}
int Call(int value) {
int tmp = value_;
value_ = value;
return tmp;
}
v8::Local<v8::FunctionTemplate> GetFunctionTemplate(v8::Isolate* isolate,
const std::string& name) {
v8::Local<v8::FunctionTemplate> function_template =
template_cache_.Get(name);
if (!function_template.IsEmpty())
return function_template;
function_template = CreateFunctionTemplate(
isolate, base::Bind(&MyInterceptor::Call), HolderIsFirstArgument);
template_cache_.Set(name, function_template);
return function_template;
}
int value_;
v8::StdGlobalValueMap<std::string, v8::FunctionTemplate> template_cache_;
DISALLOW_COPY_AND_ASSIGN(MyInterceptor);
};
WrapperInfo MyInterceptor::kWrapperInfo = {kEmbedderNativeGin};
class InterceptorTest : public V8Test {
public:
void RunInterceptorTest(const std::string& script_source) {
v8::Isolate* isolate = instance_->isolate();
v8::HandleScope handle_scope(isolate);
gin::Handle<MyInterceptor> obj = MyInterceptor::Create(isolate);
obj->set_value(42);
EXPECT_EQ(42, obj->value());
v8::Local<v8::String> source = StringToV8(isolate, script_source);
EXPECT_FALSE(source.IsEmpty());
gin::TryCatch try_catch(isolate);
v8::Local<v8::Script> script = v8::Script::Compile(source);
EXPECT_FALSE(script.IsEmpty());
v8::Local<v8::Value> val = script->Run();
EXPECT_FALSE(val.IsEmpty());
v8::Local<v8::Function> func;
EXPECT_TRUE(ConvertFromV8(isolate, val, &func));
v8::Local<v8::Value> argv[] = {ConvertToV8(isolate, obj.get()), };
func->Call(v8::Undefined(isolate), 1, argv);
EXPECT_FALSE(try_catch.HasCaught());
EXPECT_EQ("", try_catch.GetStackTrace());
EXPECT_EQ(191, obj->value());
}
};
TEST_F(InterceptorTest, NamedInterceptor) {
RunInterceptorTest(
"(function (obj) {"
" if (obj.value !== 42) throw 'FAIL';"
" else obj.value = 191; })");
}
TEST_F(InterceptorTest, NamedInterceptorCall) {
RunInterceptorTest(
"(function (obj) {"
" if (obj.func(191) !== 42) throw 'FAIL';"
" })");
}
TEST_F(InterceptorTest, IndexedInterceptor) {
RunInterceptorTest(
"(function (obj) {"
" if (obj[0] !== 42) throw 'FAIL';"
" else obj[0] = 191; })");
}
TEST_F(InterceptorTest, BypassInterceptorAllowed) {
RunInterceptorTest(
"(function (obj) {"
" obj.value = 191 /* make test happy */;"
" obj.foo = 23;"
" if (obj.foo !== 23) throw 'FAIL'; })");
}
TEST_F(InterceptorTest, BypassInterceptorForbidden) {
RunInterceptorTest(
"(function (obj) {"
" obj.value = 191 /* make test happy */;"
" obj[1] = 23;"
" if (obj[1] === 23) throw 'FAIL'; })");
}
} // namespace gin
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