Introduce cc StructTraits unit tests

BUG=611802
TBR=danakj@chromium.org for cc/test
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review-Url: https://codereview.chromium.org/2023973002
Cr-Commit-Position: refs/heads/master@{#396941}

cc/BUILD.gn

@@ -800,6 +800,7 @@ test("cc_unittests") {
     "input/scrollbar_animation_controller_thinning_unittest.cc",
     "input/top_controls_manager_unittest.cc",
     "ipc/cc_param_traits_unittest.cc",
+    "ipc/struct_traits_unittest.cc",
     "layers/heads_up_display_layer_impl_unittest.cc",
     "layers/heads_up_display_unittest.cc",
     "layers/layer_impl_unittest.cc",
@@ -949,6 +950,7 @@ test("cc_unittests") {
     ":test_support",
     "//base/test:test_support",
     "//cc/ipc",
+    "//cc/ipc:test_interfaces",
     "//cc/proto",
     "//cc/surfaces",
     "//cc/surfaces:surface_id",
@@ -957,6 +959,8 @@ test("cc_unittests") {
     "//gpu/command_buffer/client:gles2_interface",
     "//gpu/command_buffer/common:gles2_utils",
     "//media",
+    "//mojo/edk/system",
+    "//mojo/public/cpp/bindings",
     "//testing/gmock",
     "//testing/gtest",
     "//ui/events:events_base",

cc/cc_tests.gyp

@@ -338,6 +338,8 @@
         '../gpu/gpu.gyp:gpu_unittest_utils',
         '../ipc/ipc.gyp:ipc',
         '../media/media.gyp:media',
+        '../mojo/mojo_edk.gyp:mojo_common_test_support',
+        '../mojo/mojo_public.gyp:mojo_cpp_bindings',
         '../skia/skia.gyp:skia',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',

cc/ipc/BUILD.gn

@@ -40,3 +40,14 @@ mojom("interfaces") {
     "surface_id.mojom",
   ]
 }
+
+mojom("test_interfaces") {
+  testonly = true
+  sources = [
+    "traits_test_service.mojom",
+  ]
+
+  public_deps = [
+    ":interfaces",
+  ]
+}

cc/ipc/DEPS

 include_rules = [
   "+gpu/ipc/common",
+  "+mojo/public",
   "+ui/events/ipc",
 ]

cc/ipc/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 "base/run_loop.h"
+#include "cc/ipc/traits_test_service.mojom.h"
+#include "cc/quads/render_pass_id.h"
+#include "mojo/public/cpp/bindings/binding_set.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace cc {
+
+namespace {
+
+class StructTraitsTest : public testing::Test, public mojom::TraitsTestService {
+ public:
+  StructTraitsTest() {}
+
+ protected:
+  mojom::TraitsTestServicePtr GetTraitsTestProxy() {
+    return traits_test_bindings_.CreateInterfacePtrAndBind(this);
+  }
+
+ private:
+  // TraitsTestService:
+  void EchoRenderPassId(const RenderPassId& r,
+                        const EchoRenderPassIdCallback& callback) override {
+    callback.Run(r);
+  }
+
+  void EchoSurfaceId(const SurfaceId& s,
+                     const EchoSurfaceIdCallback& callback) override {
+    callback.Run(s);
+  }
+
+  mojo::BindingSet<TraitsTestService> traits_test_bindings_;
+};
+
+}  // namespace
+
+TEST_F(StructTraitsTest, RenderPassId) {
+  const int layer_id = 1337;
+  const uint32_t index = 0xdeadbeef;
+  RenderPassId input(layer_id, index);
+  base::RunLoop loop;
+  mojom::TraitsTestServicePtr proxy = GetTraitsTestProxy();
+  proxy->EchoRenderPassId(input,
+                          [layer_id, index, &loop](const RenderPassId& pass) {
+                            EXPECT_EQ(layer_id, pass.layer_id);
+                            EXPECT_EQ(index, pass.index);
+                            loop.Quit();
+                          });
+  loop.Run();
+}
+
+TEST_F(StructTraitsTest, SurfaceId) {
+  const uint32_t id_namespace = 1337;
+  const uint32_t local_id = 0xfbadbeef;
+  const uint64_t nonce = 0xdeadbeef;
+  SurfaceId input(id_namespace, local_id, nonce);
+  base::RunLoop loop;
+  mojom::TraitsTestServicePtr proxy = GetTraitsTestProxy();
+  proxy->EchoSurfaceId(
+      input, [id_namespace, local_id, nonce, &loop](const SurfaceId& pass) {
+        EXPECT_EQ(id_namespace, pass.id_namespace());
+        EXPECT_EQ(local_id, pass.local_id());
+        EXPECT_EQ(nonce, pass.nonce());
+        loop.Quit();
+      });
+  loop.Run();
+}
+
+}  // namespace cc

cc/ipc/traits_test_service.mojom

+// 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.
+
+module cc.mojom;
+
+import "cc/ipc/render_pass_id.mojom";
+import "cc/ipc/surface_id.mojom";
+
+interface TraitsTestService {
+  EchoRenderPassId(RenderPassId r) => (RenderPassId pass);
+  EchoSurfaceId(SurfaceId s) => (SurfaceId pass);
+};

cc/test/DEPS

@@ -8,3 +8,9 @@ include_rules = [
   "+gpu/command_buffer/service/image_factory.h",
   "+gpu/skia_bindings/grcontext_for_gles2_interface.h",
 ]
+
+specific_include_rules = {
+  "run_all_unittests\.cc": [
+    "+mojo/edk/embedder/embedder.h",
+  ],
+}

cc/test/run_all_unittests.cc

@@ -5,10 +5,13 @@
 #include "base/bind.h"
 #include "base/test/launcher/unit_test_launcher.h"
 #include "cc/test/cc_test_suite.h"
+#include "mojo/edk/embedder/embedder.h"
 
 int main(int argc, char** argv) {
   cc::CCTestSuite test_suite(argc, argv);
 
+  mojo::edk::Init();
+
   return base::LaunchUnitTests(
       argc,
       argv,