Create mojom and StructTraits for ui/display/types/display_mode.cc

ui/display/mojo/display_struct_traits_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 "base/logging.h"
+#include "base/message_loop/message_loop.h"
+#include "mojo/public/cpp/bindings/binding.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/display/mojo/display_struct_traits_test.mojom.h"
+#include "ui/display/types/display_mode.h"
+
+namespace display {
+
+namespace {
+
+class DisplayStructTraitsTestImpl : public mojom::DisplayStructTraitsTest {
+ public:
+  explicit DisplayStructTraitsTestImpl(
+      mojo::InterfaceRequest<mojom::DisplayStructTraitsTest> request)
+      : binding_(this, std::move(request)) {}
+
+  // DisplayStructTraitsTest:
+  void EchoDisplayMode(const DisplayMode& input,
+                       const EchoDisplayModeCallback& callback) override {
+    callback.Run(input);
+  }
+
+ private:
+  mojo::Binding<DisplayStructTraitsTest> binding_;
+
+  DISALLOW_COPY_AND_ASSIGN(DisplayStructTraitsTestImpl);
+};
+
+TEST(DisplayStructTraitsTest, Basic) {
+  // A MessageLoop is needed for Mojo IPC to work.
+  base::MessageLoop message_loop;
+
+  mojom::DisplayStructTraitsTestPtr proxy;
+  DisplayStructTraitsTestImpl impl(MakeRequest(&proxy));
+
+  // prepare sample input with random values
+  const DisplayMode input(gfx::Size(15, 29), true, 61.0);
+
+  DisplayMode output;
+
+  EXPECT_TRUE(proxy->EchoDisplayMode(input, &output));
+
+  // We want to test each component individually to make sure each data member
+  // was correctly serialized and deserialized.
+  EXPECT_EQ(input.size(), output.size());
+  EXPECT_EQ(input.is_interlaced(), output.is_interlaced());
+  EXPECT_EQ(input.refresh_rate(), output.refresh_rate());
+}
+
+}  // namespace
+
+}  // namespace display