Begin implementing V8 bindings for Mojo

mojo/public/bindings/js/test/harness.cc

+// Copyright 2013 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 "base/file_util.h"
+#include "base/path_service.h"
+#include "gin/converter.h"
+#include "gin/runner.h"
+#include "gin/test/gtest.h"
+#include "mojo/public/bindings/js/runner_delegate.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using v8::Isolate;
+using v8::Object;
+using v8::Script;
+using v8::Value;
+
+namespace mojo {
+namespace js {
+namespace {
+
+class TestRunnerDelegate : public RunnerDelegate {
+ public:
+  virtual ~TestRunnerDelegate() {}
+
+  virtual v8::Handle<Object> CreateRootObject(
+      gin::Runner* runner) MOJO_OVERRIDE {
+    v8::Handle<Object> root = RunnerDelegate::CreateRootObject(runner);
+    root->Set(gin::StringToSymbol(runner->isolate(), "gtest"),
+              gin::GetGTestTemplate(runner->isolate())->NewInstance());
+    return root;
+  }
+};
+
+void RunTestFromFile(const base::FilePath& path) {
+  EXPECT_TRUE(base::PathExists(path)) << path.LossyDisplayName();
+  std::string source;
+  EXPECT_TRUE(ReadFileToString(path, &source));
+  Isolate* isolate = Isolate::GetCurrent();
+
+  TestRunnerDelegate delegate;
+  gin::Runner runner(&delegate, isolate);
+  gin::Runner::Scope scope(&runner);
+
+  v8::TryCatch try_catch;
+  runner.Run(Script::New(gin::StringToV8(isolate, source)));
+
+  EXPECT_FALSE(try_catch.HasCaught());
+}
+
+void RunTest(std::string test) {
+  base::FilePath path;
+  PathService::Get(base::DIR_SOURCE_ROOT, &path);
+  path = path.AppendASCII("mojo")
+             .AppendASCII("public")
+             .AppendASCII("bindings")
+             .AppendASCII("js")
+             .AppendASCII(test);
+  RunTestFromFile(path);
+}
+
+// TODO(abarth): Should we autogenerate these stubs from GYP?
+TEST(Harness, mojo_unittests_js) {
+  RunTest("mojo_unittests.js");
+}
+
+}  // namespace
+}  // namespace js
+}  // namespace mojo