Struct traits for gfx::Range and gfx::RangeF.

ui/gfx/range/mojo/range_struct_traits_unittest.cc

+// 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 "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/range/mojo/range_traits_test_service.mojom.h"
+
+namespace gfx {
+
+namespace {
+
+class RangeStructTraitsTest : public testing::Test,
+                              public mojom::RangeTraitsTestService {
+ public:
+  RangeStructTraitsTest() {}
+
+ protected:
+  mojom::RangeTraitsTestServicePtr GetTraitsTestProxy() {
+    return traits_test_bindings_.CreateInterfacePtrAndBind(this);
+  }
+
+ private:
+  // RangeTraitsTestService:
+  void EchoRange(const Range& p, const EchoRangeCallback& callback) override {
+    callback.Run(p);
+  }
+
+  void EchoRangeF(const RangeF& p,
+                  const EchoRangeFCallback& callback) override {
+    callback.Run(p);
+  }
+
+  base::MessageLoop loop_;
+  mojo::BindingSet<RangeTraitsTestService> traits_test_bindings_;
+
+  DISALLOW_COPY_AND_ASSIGN(RangeStructTraitsTest);
+};
+
+}  // namespace
+
+TEST_F(RangeStructTraitsTest, Range) {
+  const uint32_t start = 1234;
+  const uint32_t end = 5678;
+  gfx::Range input(start, end);
+  mojom::RangeTraitsTestServicePtr proxy = GetTraitsTestProxy();
+  gfx::Range output;
+  proxy->EchoRange(input, &output);
+  EXPECT_EQ(start, output.start());
+  EXPECT_EQ(end, output.end());
+}
+
+TEST_F(RangeStructTraitsTest, RangeF) {
+  const float start = 1234.5f;
+  const float end = 6789.6f;
+  gfx::RangeF input(start, end);
+  mojom::RangeTraitsTestServicePtr proxy = GetTraitsTestProxy();
+  gfx::RangeF output;
+  proxy->EchoRangeF(input, &output);
+  EXPECT_EQ(start, output.start());
+  EXPECT_EQ(end, output.end());
+}
+
+}  // namespace gfx