gin/arguments_unittest.cc

// Copyright 2017 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 "gin/arguments.h"

#include "base/bind.h"
#include "gin/converter.h"
#include "gin/object_template_builder.h"
#include "gin/public/isolate_holder.h"
#include "gin/test/v8_test.h"
#include "v8/include/v8.h"

namespace gin {

using ArgumentsTest = V8Test;

// Test that Arguments::GetHolderCreationContext returns the proper context.
TEST_F(ArgumentsTest, TestArgumentsHolderCreationContext) {
  v8::Isolate* isolate = instance_->isolate();
  v8::HandleScope handle_scope(isolate);

  v8::Local<v8::Context> creation_context = context_.Get(instance_->isolate());

  auto check_creation_context = [](v8::Local<v8::Context> expected_context,
                                   gin::Arguments* arguments) {
    EXPECT_EQ(expected_context, arguments->GetHolderCreationContext());
  };

  // Create an object that will compare GetHolderCreationContext() with
  // |creation_context|.
  v8::Local<v8::ObjectTemplate> object_template =
      ObjectTemplateBuilder(isolate)
          .SetMethod("checkCreationContext",
                     base::Bind(check_creation_context, creation_context))
          .Build();

  v8::Local<v8::Object> object =
      object_template->NewInstance(creation_context).ToLocalChecked();

  // Call checkCreationContext() on the generated object using the passed-in
  // context as the current context.
  auto test_context = [object, isolate](v8::Local<v8::Context> context) {
    v8::Context::Scope context_scope(context);
    const char kCallFunction[] = "(function(o) { o.checkCreationContext(); })";
    v8::Local<v8::Script> script =
        v8::Script::Compile(context, StringToV8(isolate, kCallFunction))
            .ToLocalChecked();
    v8::Local<v8::Function> function;
    ASSERT_TRUE(ConvertFromV8(isolate, script->Run(), &function));
    v8::Local<v8::Value> args[] = {object};
    function->Call(v8::Undefined(isolate), arraysize(args), args);
  };

  // Test calling in the creation context.
  test_context(creation_context);

  {
    // Create a second context, and test calling in that. The creation context
    // should be the same (even though the current context has changed).
    v8::Local<v8::Context> second_context =
        v8::Context::New(isolate, nullptr, v8::Local<v8::ObjectTemplate>());
    test_context(second_context);
  }
}

}  // namespace gin