src/gin/wrappable_unittest.cc

   1 // Copyright 2013 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/object_template_builder.h"
   9 #include "gin/per_isolate_data.h"
  10 #include "gin/public/isolate_holder.h"
  11 #include "gin/test/v8_test.h"
  12 #include "gin/try_catch.h"
  13 #include "gin/wrappable.h"
  14 #include "testing/gtest/include/gtest/gtest.h"
  15
  16 namespace gin {
  17
  18 class BaseClass {
  19  public:
  20   BaseClass() : value_(23) {}
  21   virtual ~BaseClass() {}
  22
  23  private:
  24   int value_;
  25
  26   DISALLOW_COPY_AND_ASSIGN(BaseClass);
  27 };
  28
  29 class MyObject : public BaseClass,
  30                  public Wrappable<MyObject> {
  31  public:
  32   static WrapperInfo kWrapperInfo;
  33
  34   static gin::Handle<MyObject> Create(v8::Isolate* isolate) {
  35     return CreateHandle(isolate, new MyObject());
  36   }
  37
  38   int value() const { return value_; }
  39   void set_value(int value) { value_ = value; }
  40
  41  protected:
  42   MyObject() : value_(0) {}
  43   ObjectTemplateBuilder GetObjectTemplateBuilder(v8::Isolate* isolate) override;
  44   ~MyObject() override {}
  45
  46  private:
  47   int value_;
  48 };
  49
  50 class MyObjectSubclass : public MyObject {
  51  public:
  52   static gin::Handle<MyObjectSubclass> Create(v8::Isolate* isolate) {
  53     return CreateHandle(isolate, new MyObjectSubclass());
  54   }
  55
  56   void SayHello(const std::string& name) {
  57     result = std::string("Hello, ") + name;
  58   }
  59
  60   std::string result;
  61
  62  private:
  63   ObjectTemplateBuilder GetObjectTemplateBuilder(
  64       v8::Isolate* isolate) override {
  65     return MyObject::GetObjectTemplateBuilder(isolate)
  66         .SetMethod("sayHello", &MyObjectSubclass::SayHello);
  67   }
  68
  69   MyObjectSubclass() {
  70   }
  71
  72   ~MyObjectSubclass() override {}
  73 };
  74
  75 class MyCallableObject : public Wrappable<MyCallableObject> {
  76  public:
  77   static WrapperInfo kWrapperInfo;
  78
  79   static gin::Handle<MyCallableObject> Create(v8::Isolate* isolate) {
  80     return CreateHandle(isolate, new MyCallableObject());
  81   }
  82
  83   int result() { return result_; }
  84
  85  private:
  86   ObjectTemplateBuilder GetObjectTemplateBuilder(
  87       v8::Isolate* isolate) override {
  88     return Wrappable<MyCallableObject>::GetObjectTemplateBuilder(isolate)
  89         .SetCallAsFunctionHandler(&MyCallableObject::Call);
  90   }
  91
  92   MyCallableObject() : result_(0) {
  93   }
  94
  95   ~MyCallableObject() override {}
  96
  97   void Call(int val1, int val2, int val3, const gin::Arguments& arguments) {
  98     if (arguments.IsConstructCall())
  99       arguments.ThrowTypeError("Cannot be called as constructor.");
 100     else
 101       result_ = val1;
 102   }
 103
 104   int result_;
 105 };
 106
 107 class MyObject2 : public Wrappable<MyObject2> {
 108  public:
 109   static WrapperInfo kWrapperInfo;
 110 };
 111
 112 class MyObjectBlink : public Wrappable<MyObjectBlink> {
 113  public:
 114   static WrapperInfo kWrapperInfo;
 115 };
 116
 117 WrapperInfo MyObject::kWrapperInfo = { kEmbedderNativeGin };
 118 ObjectTemplateBuilder MyObject::GetObjectTemplateBuilder(v8::Isolate* isolate) {
 119   return Wrappable<MyObject>::GetObjectTemplateBuilder(isolate)
 120       .SetProperty("value", &MyObject::value, &MyObject::set_value);
 121 }
 122
 123 WrapperInfo MyCallableObject::kWrapperInfo = { kEmbedderNativeGin };
 124 WrapperInfo MyObject2::kWrapperInfo = { kEmbedderNativeGin };
 125 WrapperInfo MyObjectBlink::kWrapperInfo = { kEmbedderNativeGin };
 126
 127 typedef V8Test WrappableTest;
 128
 129 TEST_F(WrappableTest, WrapAndUnwrap) {
 130   v8::Isolate* isolate = instance_->isolate();
 131   v8::HandleScope handle_scope(isolate);
 132
 133   Handle<MyObject> obj = MyObject::Create(isolate);
 134
 135   v8::Handle<v8::Value> wrapper = ConvertToV8(isolate, obj.get());
 136   EXPECT_FALSE(wrapper.IsEmpty());
 137
 138   MyObject* unwrapped = NULL;
 139   EXPECT_TRUE(ConvertFromV8(isolate, wrapper, &unwrapped));
 140   EXPECT_EQ(obj.get(), unwrapped);
 141 }
 142
 143 TEST_F(WrappableTest, UnwrapFailures) {
 144   v8::Isolate* isolate = instance_->isolate();
 145   v8::HandleScope handle_scope(isolate);
 146
 147   // Something that isn't an object.
 148   v8::Handle<v8::Value> thing = v8::Number::New(isolate, 42);
 149   MyObject* unwrapped = NULL;
 150   EXPECT_FALSE(ConvertFromV8(isolate, thing, &unwrapped));
 151   EXPECT_FALSE(unwrapped);
 152
 153   // An object that's not wrapping anything.
 154   thing = v8::Object::New(isolate);
 155   EXPECT_FALSE(ConvertFromV8(isolate, thing, &unwrapped));
 156   EXPECT_FALSE(unwrapped);
 157
 158   // An object that's wrapping a C++ object from Blink.
 159   thing.Clear();
 160   thing = ConvertToV8(isolate, new MyObjectBlink());
 161   EXPECT_FALSE(ConvertFromV8(isolate, thing, &unwrapped));
 162   EXPECT_FALSE(unwrapped);
 163
 164   // An object that's wrapping a C++ object of the wrong type.
 165   thing.Clear();
 166   thing = ConvertToV8(isolate, new MyObject2());
 167   EXPECT_FALSE(ConvertFromV8(isolate, thing, &unwrapped));
 168   EXPECT_FALSE(unwrapped);
 169 }
 170
 171 TEST_F(WrappableTest, GetAndSetProperty) {
 172   v8::Isolate* isolate = instance_->isolate();
 173   v8::HandleScope handle_scope(isolate);
 174
 175   gin::Handle<MyObject> obj = MyObject::Create(isolate);
 176
 177   obj->set_value(42);
 178   EXPECT_EQ(42, obj->value());
 179
 180   v8::Handle<v8::String> source = StringToV8(isolate,
 181       "(function (obj) {"
 182       "   if (obj.value !== 42) throw 'FAIL';"
 183       "   else obj.value = 191; })");
 184   EXPECT_FALSE(source.IsEmpty());
 185
 186   gin::TryCatch try_catch;
 187   v8::Handle<v8::Script> script = v8::Script::Compile(source);
 188   EXPECT_FALSE(script.IsEmpty());
 189   v8::Handle<v8::Value> val = script->Run();
 190   EXPECT_FALSE(val.IsEmpty());
 191   v8::Handle<v8::Function> func;
 192   EXPECT_TRUE(ConvertFromV8(isolate, val, &func));
 193   v8::Handle<v8::Value> argv[] = {
 194     ConvertToV8(isolate, obj.get()),
 195   };
 196   func->Call(v8::Undefined(isolate), 1, argv);
 197   EXPECT_FALSE(try_catch.HasCaught());
 198   EXPECT_EQ("", try_catch.GetStackTrace());
 199
 200   EXPECT_EQ(191, obj->value());
 201 }
 202
 203 TEST_F(WrappableTest, WrappableSubclass) {
 204   v8::Isolate* isolate = instance_->isolate();
 205   v8::HandleScope handle_scope(isolate);
 206
 207   gin::Handle<MyObjectSubclass> object(MyObjectSubclass::Create(isolate));
 208   v8::Handle<v8::String> source = StringToV8(isolate,
 209                                              "(function(obj) {"
 210                                              "obj.sayHello('Lily');"
 211                                              "})");
 212   gin::TryCatch try_catch;
 213   v8::Handle<v8::Script> script = v8::Script::Compile(source);
 214   v8::Handle<v8::Value> val = script->Run();
 215   v8::Handle<v8::Function> func;
 216   EXPECT_TRUE(ConvertFromV8(isolate, val, &func));
 217   v8::Handle<v8::Value> argv[] = {
 218     ConvertToV8(isolate, object.get())
 219   };
 220   func->Call(v8::Undefined(isolate), 1, argv);
 221   EXPECT_FALSE(try_catch.HasCaught());
 222   EXPECT_EQ("Hello, Lily", object->result);
 223 }
 224
 225 TEST_F(WrappableTest, CallAsFunction) {
 226   v8::Isolate* isolate = instance_->isolate();
 227   v8::HandleScope handle_scope(isolate);
 228
 229   gin::Handle<MyCallableObject> object(MyCallableObject::Create(isolate));
 230   EXPECT_EQ(0, object->result());
 231   v8::Handle<v8::String> source = StringToV8(isolate,
 232                                              "(function(obj) {"
 233                                              "obj(42, 2, 5);"
 234                                              "})");
 235   gin::TryCatch try_catch;
 236   v8::Handle<v8::Script> script = v8::Script::Compile(source);
 237   v8::Handle<v8::Value> val = script->Run();
 238   v8::Handle<v8::Function> func;
 239   EXPECT_TRUE(ConvertFromV8(isolate, val, &func));
 240   v8::Handle<v8::Value> argv[] = {
 241     ConvertToV8(isolate, object.get())
 242   };
 243   func->Call(v8::Undefined(isolate), 1, argv);
 244   EXPECT_FALSE(try_catch.HasCaught());
 245   EXPECT_EQ(42, object->result());
 246 }
 247
 248 TEST_F(WrappableTest, CallAsConstructor) {
 249   v8::Isolate* isolate = instance_->isolate();
 250   v8::HandleScope handle_scope(isolate);
 251
 252   gin::Handle<MyCallableObject> object(MyCallableObject::Create(isolate));
 253   EXPECT_EQ(0, object->result());
 254   v8::Handle<v8::String> source = StringToV8(isolate,
 255                                              "(function(obj) {"
 256                                              "new obj(42, 2, 5);"
 257                                              "})");
 258   gin::TryCatch try_catch;
 259   v8::Handle<v8::Script> script = v8::Script::Compile(source);
 260   v8::Handle<v8::Value> val = script->Run();
 261   v8::Handle<v8::Function> func;
 262   EXPECT_TRUE(ConvertFromV8(isolate, val, &func));
 263   v8::Handle<v8::Value> argv[] = {
 264     ConvertToV8(isolate, object.get())
 265   };
 266   func->Call(v8::Undefined(isolate), 1, argv);
 267   EXPECT_TRUE(try_catch.HasCaught());
 268 }
 269
 270 }  // namespace gin