Mojo: more idiomatic C++ bindings

mojo/public/cpp/bindings/tests/struct_unittest.cc

+// 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 "mojo/public/interfaces/bindings/tests/test_structs.mojom.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace mojo {
+namespace test {
+namespace {
+
+RectPtr MakeRect() {
+  RectPtr rect(Rect::New());
+  rect->x = 1;
+  rect->y = 2;
+  rect->width = 10;
+  rect->height = 20;
+  return rect.Pass();
+}
+
+void CheckRect(const Rect& rect) {
+  EXPECT_EQ(1, rect.x);
+  EXPECT_EQ(2, rect.y);
+  EXPECT_EQ(10, rect.width);
+  EXPECT_EQ(20, rect.height);
+}
+
+}  // namespace
+
+TEST(StructTest, Rect) {
+  RectPtr rect;
+  EXPECT_TRUE(rect.is_null());
+  EXPECT_TRUE(!rect);
+  EXPECT_FALSE(rect);
+
+  rect = MakeRect();
+  EXPECT_FALSE(rect.is_null());
+  EXPECT_FALSE(!rect);
+  EXPECT_TRUE(rect);
+
+  CheckRect(*rect);
+}
+
+}  // namespace test
+}  // namespace mojo