Add a mojom/StructTrait for display::Display.

services/ui/public/interfaces/display/display_struct_traits_unittest.cc

Index: services/ui/public/interfaces/display/display_struct_traits_unittest.cc
diff --git a/services/ui/public/interfaces/display/display_struct_traits_unittest.cc b/services/ui/public/interfaces/display/display_struct_traits_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..429d20ef22ad6e58f7b84f7e7eeed81014898be8
--- /dev/null
+++ b/services/ui/public/interfaces/display/display_struct_traits_unittest.cc
@@ -0,0 +1,82 @@
+// Copyright 2016 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/message_loop/message_loop.h"
+#include "mojo/public/cpp/bindings/binding_set.h"
+#include "services/ui/public/interfaces/display/display_struct_traits_test.mojom.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/display/display.h"
+#include "ui/gfx/geometry/rect.h"
+#include "ui/gfx/geometry/size.h"
+
+namespace display {
+
+namespace {
+
+class DisplayStructTraitsTest : public testing::Test,
+                                public mojom::DisplayStructTraitsTest {
+ public:
+  DisplayStructTraitsTest() {}
+
+ protected:
+  mojom::DisplayStructTraitsTestPtr GetTraitsTestProxy() {
+    return traits_test_bindings_.CreateInterfacePtrAndBind(this);
+  }
+
+ private:
+  // mojom::DisplayStructTraitsTest:
+  void EchoDisplay(const Display& in,
+                   const EchoDisplayCallback& callback) override {
+    callback.Run(in);
+  }
+
+  base::MessageLoop loop_;  // A MessageLoop is needed for Mojo IPC to work.
+  mojo::BindingSet<mojom::DisplayStructTraitsTest> traits_test_bindings_;
+
+  DISALLOW_COPY_AND_ASSIGN(DisplayStructTraitsTest);
+};
+
+void CheckDisplaysEqual(const Display& input, const Display& output) {
+  EXPECT_NE(&input, &output);  // Make sure they aren't the same object.
+  EXPECT_EQ(input.id(), output.id());
+  EXPECT_EQ(input.bounds(), output.bounds());
+  EXPECT_EQ(input.work_area(), output.work_area());
+  EXPECT_EQ(input.device_scale_factor(), output.device_scale_factor());
+  EXPECT_EQ(input.rotation(), output.rotation());
+  EXPECT_EQ(input.touch_support(), output.touch_support());
+  EXPECT_EQ(input.maximum_cursor_size(), output.maximum_cursor_size());
+}
+
+}  // namespace
+
+TEST_F(DisplayStructTraitsTest, DefaultDisplayValues) {
+  Display input(5);
+
+  mojom::DisplayStructTraitsTestPtr proxy = GetTraitsTestProxy();
+  Display output;
+  proxy->EchoDisplay(input, &output);
+
+  CheckDisplaysEqual(input, output);
+}
+
+TEST_F(DisplayStructTraitsTest, SetAllDisplayValues) {
+  const gfx::Rect bounds(100, 200, 500, 600);
+  const gfx::Rect work_area(150, 250, 400, 500);
+  const gfx::Size maximum_cursor_size(64, 64);
+
+  Display input(246345234, bounds);
+  input.set_work_area(work_area);
+  input.set_device_scale_factor(2.0f);
+  input.set_rotation(Display::ROTATE_270);
+  input.set_touch_support(Display::TOUCH_SUPPORT_AVAILABLE);
+  input.set_maximum_cursor_size(maximum_cursor_size);
+
+  mojom::DisplayStructTraitsTestPtr proxy = GetTraitsTestProxy();
+  Display output;
+  proxy->EchoDisplay(input, &output);
+
+  CheckDisplaysEqual(input, output);
+}
+
+}  // namespace display