gin/interceptor_unittest.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/logging.h"
   6 #include "gin/arguments.h"
   7 #include "gin/handle.h"
   8 #include "gin/interceptor.h"
   9 #include "gin/object_template_builder.h"
  10 #include "gin/per_isolate_data.h"
  11 #include "gin/public/isolate_holder.h"
  12 #include "gin/test/v8_test.h"
  13 #include "gin/try_catch.h"
  14 #include "gin/wrappable.h"
  15 #include "testing/gtest/include/gtest/gtest.h"
  16 #include "v8/include/v8-util.h"
  17
  18 namespace gin {
  19
  20 class MyInterceptor : public Wrappable<MyInterceptor>,
  21                       public NamedPropertyInterceptor,
  22                       public IndexedPropertyInterceptor {
  23  public:
  24   static WrapperInfo kWrapperInfo;
  25
  26   static gin::Handle<MyInterceptor> Create(v8::Isolate* isolate) {
  27     return CreateHandle(isolate, new MyInterceptor(isolate));
  28   }
  29
  30   int value() const { return value_; }
  31   void set_value(int value) { value_ = value; }
  32
  33   // gin::NamedPropertyInterceptor
  34   v8::Local<v8::Value> GetNamedProperty(v8::Isolate* isolate,
  35                                         const std::string& property) override {
  36     if (property == "value") {
  37       return ConvertToV8(isolate, value_);
  38     } else if (property == "func") {
  39       return GetFunctionTemplate(isolate, "func")->GetFunction();
  40     } else {
  41       return v8::Local<v8::Value>();
  42     }
  43   }
  44   bool SetNamedProperty(v8::Isolate* isolate,
  45                         const std::string& property,
  46                         v8::Local<v8::Value> value) override {
  47     if (property == "value") {
  48       ConvertFromV8(isolate, value, &value_);
  49       return true;
  50     }
  51     return false;
  52   }
  53   std::vector<std::string> EnumerateNamedProperties(
  54       v8::Isolate* isolate) override {
  55     std::vector<std::string> result;
  56     result.push_back("func");
  57     result.push_back("value");
  58     return result;
  59   }
  60
  61   // gin::IndexedPropertyInterceptor
  62   v8::Local<v8::Value> GetIndexedProperty(v8::Isolate* isolate,
  63                                           uint32_t index) override {
  64     if (index == 0)
  65       return ConvertToV8(isolate, value_);
  66     return v8::Local<v8::Value>();
  67   }
  68   bool SetIndexedProperty(v8::Isolate* isolate,
  69                           uint32_t index,
  70                           v8::Local<v8::Value> value) override {
  71     if (index == 0) {
  72       ConvertFromV8(isolate, value, &value_);
  73       return true;
  74     }
  75     // Don't allow bypassing the interceptor.
  76     return true;
  77   }
  78   std::vector<uint32_t> EnumerateIndexedProperties(
  79       v8::Isolate* isolate) override {
  80     std::vector<uint32_t> result;
  81     result.push_back(0);
  82     return result;
  83   }
  84
  85  private:
  86   explicit MyInterceptor(v8::Isolate* isolate)
  87       : NamedPropertyInterceptor(isolate, this),
  88         IndexedPropertyInterceptor(isolate, this),
  89         value_(0),
  90         template_cache_(isolate) {}
  91   ~MyInterceptor() override {}
  92
  93   // gin::Wrappable
  94   ObjectTemplateBuilder GetObjectTemplateBuilder(
  95       v8::Isolate* isolate) override {
  96     return Wrappable<MyInterceptor>::GetObjectTemplateBuilder(isolate)
  97         .AddNamedPropertyInterceptor()
  98         .AddIndexedPropertyInterceptor();
  99   }
 100
 101   int Call(int value) {
 102     int tmp = value_;
 103     value_ = value;
 104     return tmp;
 105   }
 106
 107   v8::Local<v8::FunctionTemplate> GetFunctionTemplate(v8::Isolate* isolate,
 108                                                       const std::string& name) {
 109     v8::Local<v8::FunctionTemplate> function_template =
 110         template_cache_.Get(name);
 111     if (!function_template.IsEmpty())
 112       return function_template;
 113     function_template = CreateFunctionTemplate(
 114         isolate, base::Bind(&MyInterceptor::Call), HolderIsFirstArgument);
 115     template_cache_.Set(name, function_template);
 116     return function_template;
 117   }
 118
 119   int value_;
 120
 121   v8::StdGlobalValueMap<std::string, v8::FunctionTemplate> template_cache_;
 122
 123   DISALLOW_COPY_AND_ASSIGN(MyInterceptor);
 124 };
 125
 126 WrapperInfo MyInterceptor::kWrapperInfo = {kEmbedderNativeGin};
 127
 128 class InterceptorTest : public V8Test {
 129  public:
 130   void RunInterceptorTest(const std::string& script_source) {
 131     v8::Isolate* isolate = instance_->isolate();
 132     v8::HandleScope handle_scope(isolate);
 133
 134     gin::Handle<MyInterceptor> obj = MyInterceptor::Create(isolate);
 135
 136     obj->set_value(42);
 137     EXPECT_EQ(42, obj->value());
 138
 139     v8::Local<v8::String> source = StringToV8(isolate, script_source);
 140     EXPECT_FALSE(source.IsEmpty());
 141
 142     gin::TryCatch try_catch;
 143     v8::Local<v8::Script> script = v8::Script::Compile(source);
 144     EXPECT_FALSE(script.IsEmpty());
 145     v8::Local<v8::Value> val = script->Run();
 146     EXPECT_FALSE(val.IsEmpty());
 147     v8::Local<v8::Function> func;
 148     EXPECT_TRUE(ConvertFromV8(isolate, val, &func));
 149     v8::Local<v8::Value> argv[] = {ConvertToV8(isolate, obj.get()), };
 150     func->Call(v8::Undefined(isolate), 1, argv);
 151     EXPECT_FALSE(try_catch.HasCaught());
 152     EXPECT_EQ("", try_catch.GetStackTrace());
 153
 154     EXPECT_EQ(191, obj->value());
 155   }
 156 };
 157
 158 TEST_F(InterceptorTest, NamedInterceptor) {
 159   RunInterceptorTest(
 160       "(function (obj) {"
 161       "   if (obj.value !== 42) throw 'FAIL';"
 162       "   else obj.value = 191; })");
 163 }
 164
 165 TEST_F(InterceptorTest, NamedInterceptorCall) {
 166   RunInterceptorTest(
 167       "(function (obj) {"
 168       "   if (obj.func(191) !== 42) throw 'FAIL';"
 169       "   })");
 170 }
 171
 172 TEST_F(InterceptorTest, IndexedInterceptor) {
 173   RunInterceptorTest(
 174       "(function (obj) {"
 175       "   if (obj[0] !== 42) throw 'FAIL';"
 176       "   else obj[0] = 191; })");
 177 }
 178
 179 TEST_F(InterceptorTest, BypassInterceptorAllowed) {
 180   RunInterceptorTest(
 181       "(function (obj) {"
 182       "   obj.value = 191 /* make test happy */;"
 183       "   obj.foo = 23;"
 184       "   if (obj.foo !== 23) throw 'FAIL'; })");
 185 }
 186
 187 TEST_F(InterceptorTest, BypassInterceptorForbidden) {
 188   RunInterceptorTest(
 189       "(function (obj) {"
 190       "   obj.value = 191 /* make test happy */;"
 191       "   obj[1] = 23;"
 192       "   if (obj[1] === 23) throw 'FAIL'; })");
 193 }
 194
 195 }  // namespace gin