Add glue between the client and engine for Blimp

blimp/client/render_widget_message_processor_unittest.cc

Index: blimp/client/render_widget_message_processor_unittest.cc
diff --git a/blimp/client/render_widget_message_processor_unittest.cc b/blimp/client/render_widget_message_processor_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..09bf1f732158705e000c4e3922b1319a3ccd3493
--- /dev/null
+++ b/blimp/client/render_widget_message_processor_unittest.cc
@@ -0,0 +1,147 @@
+// Copyright 2015 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 "blimp/client/render_widget_message_processor.h"
+
+#include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
+#include "blimp/common/proto/blimp_message.pb.h"
+#include "blimp/common/proto/compositor.pb.h"
+#include "blimp/common/proto/render_widget.pb.h"
+#include "cc/proto/compositor_message.pb.h"
+#include "net/base/net_errors.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using testing::_;
+using testing::InvokeArgument;
+using testing::Ref;
+using testing::Return;
+using testing::SaveArg;
+
+namespace blimp {
+
+namespace {
+class MockBlimpMessageProcessor : public BlimpMessageProcessor {
+ public:
+  MockBlimpMessageProcessor() {}
+
+  ~MockBlimpMessageProcessor() override {}
+
+  // Adapts calls from ProcessMessage to MockableProcessMessage by
+  // unboxing the |message| scoped_ptr for GMock compatibility.
+  void ProcessMessage(scoped_ptr<BlimpMessage> message,
+                      const net::CompletionCallback& callback) {
+    MockableProcessMessage(*message);
+    if (!callback.is_null())
+      callback.Run(net::OK);
+  }
+
+  MOCK_METHOD1(MockableProcessMessage,
+               void(const BlimpMessage& message));
+};
+
+class MockRenderWidgetMessageDelegate
+    : public RenderWidgetMessageProcessor::RenderWidgetMessageDelegate {
+ public:
+  // RenderWidgetMessageDelegate implementation.
+  void OnRenderWidgetInitialized() override {
+    MockableOnRenderWidgetInitialized();
+  }
+  void OnCompositorMessageReceived(
+      scoped_ptr<cc::proto::CompositorMessage> message) override {
+    MockableOnCompositorMessageReceived(*message);
+  }
+
+  MOCK_METHOD0(MockableOnRenderWidgetInitialized, void());
+  MOCK_METHOD1(MockableOnCompositorMessageReceived,
+               void(const cc::proto::CompositorMessage& message));
+};
+
+MATCHER_P2(CompositorMessageEquals, tab_id, rw_id, "") {
+  return arg.compositor().render_widget_id() == rw_id &&
+      arg.target_tab_id() == tab_id;
+}
+
+void SendRenderWidgetMessage(BlimpMessageProcessor* processor,
+                             int tab_id,
+                             uint32_t rw_id) {
+  scoped_ptr<BlimpMessage> message(new BlimpMessage);
+  message->set_type(BlimpMessage::RENDER_WIDGET);
+  message->set_target_tab_id(tab_id);
+
+  RenderWidgetMessage* details = message->mutable_render_widget();
+  details->set_type(RenderWidgetMessage::INITIALIZE);
+  details->set_render_widget_id(rw_id);
+  processor->ProcessMessage(message.Pass(),
+                            net::CompletionCallback());
+}
+
+void SendCompositorMessage(BlimpMessageProcessor* processor,
+                             int tab_id,
+                             uint32_t rw_id) {
+  scoped_ptr<BlimpMessage> message(new BlimpMessage);
+  message->set_type(BlimpMessage::COMPOSITOR);
+  message->set_target_tab_id(tab_id);
+
+  CompositorMessage* details = message->mutable_compositor();
+  details->set_render_widget_id(rw_id);
+  processor->ProcessMessage(message.Pass(),
+                            net::CompletionCallback());
+}
+
+}  // namespace
+
+class RenderWidgetMessageProcessorTest : public testing::Test {
+ public:
+  RenderWidgetMessageProcessorTest()
+      : processor_(&out_processor_) {}
+
+  void SetUp() override {
+    processor_.SetDelegate(1, &delegate1_);
+    processor_.SetDelegate(2, &delegate2_);
+  }
+
+ protected:
+  MockBlimpMessageProcessor out_processor_;
+  MockRenderWidgetMessageDelegate delegate1_;
+  MockRenderWidgetMessageDelegate delegate2_;
+
+  RenderWidgetMessageProcessor processor_;
+};
+
+TEST_F(RenderWidgetMessageProcessorTest, DelegateCallsOK) {
+  EXPECT_CALL(delegate1_, MockableOnRenderWidgetInitialized()).Times(1);
+  SendRenderWidgetMessage(&processor_, 1, 1U);
+
+  EXPECT_CALL(delegate1_, MockableOnCompositorMessageReceived(_)).Times(1);
+  SendCompositorMessage(&processor_, 1, 1U);
+
+  EXPECT_CALL(delegate2_, MockableOnRenderWidgetInitialized()).Times(1);
+  SendRenderWidgetMessage(&processor_, 2, 2U);
+
+  EXPECT_CALL(delegate2_, MockableOnCompositorMessageReceived(_)).Times(1);
+  SendCompositorMessage(&processor_, 2, 2U);
+}
+
+TEST_F(RenderWidgetMessageProcessorTest, RepliesHaveCorrectRenderWidgetId) {
+  SendRenderWidgetMessage(&processor_, 1, 2U);
+  SendRenderWidgetMessage(&processor_, 2, 1U);
+
+  EXPECT_CALL(out_processor_,
+              MockableProcessMessage(CompositorMessageEquals(1, 2U))).Times(1);
+  processor_.SendCompositorMessage(1, cc::proto::CompositorMessage());
+
+  SendRenderWidgetMessage(&processor_, 1, 3U);
+
+  EXPECT_CALL(out_processor_,
+              MockableProcessMessage(CompositorMessageEquals(1, 3U))).Times(1);
+  processor_.SendCompositorMessage(1, cc::proto::CompositorMessage());
+
+  EXPECT_CALL(out_processor_,
+              MockableProcessMessage(CompositorMessageEquals(2, 1U))).Times(1);
+  processor_.SendCompositorMessage(2, cc::proto::CompositorMessage());
+}
+
+}  // namespace blimp