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

ui/ozone/common/mojo/ozone_gpu_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/ozone/common/gpu/ozone_gpu_message_params.h"
+#include "ui/ozone/common/mojo/ozone_gpu_struct_traits_test.mojom.h"
+
+namespace ui {
+
+namespace {
+
+class OzoneGpuStructTraitsTestImpl : public mojom::OzoneGpuStructTraitsTest {
+ public:
+  explicit OzoneGpuStructTraitsTestImpl(
+      mojo::InterfaceRequest<mojom::OzoneGpuStructTraitsTest> request)
+      : binding_(this, std::move(request)) {}
+
+  // OzoneGpuStructTraitsTest:
+  void EchoDisplayModeParams(
+      const DisplayMode_Params& input,
+      const EchoDisplayModeParamsCallback& callback) override {
+    callback.Run(input);
+  }
+
+ private:
+  mojo::Binding<OzoneGpuStructTraitsTest> binding_;
+
+  DISALLOW_COPY_AND_ASSIGN(OzoneGpuStructTraitsTestImpl);
+};
+
+TEST(OzoneGpuStructTraitsTest, Basic) {
+  // A MessageLoop is needed for Mojo IPC to work.
+  base::MessageLoop message_loop;
+
+  mojom::OzoneGpuStructTraitsTestPtr proxy;
+  OzoneGpuStructTraitsTestImpl impl(MakeRequest(&proxy));
+
+  // prepare sample input with random values
+  DisplayMode_Params input;
+  input.size = gfx::Size(15, 29);
+  input.is_interlaced = true;
+  input.refresh_rate = 61;
+
+  ui::DisplayMode_Params output;
+
+  EXPECT_TRUE(proxy->EchoDisplayModeParams(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 ui