1 files changed, 162 insertions, 0 deletions
diff --git a/cast/streaming/rpc_messenger_unittest.cc b/cast/streaming/rpc_messenger_unittest.cc
new file mode 100644
index 00000000..758a9036
--- /dev/null
+++ b/cast/streaming/rpc_messenger_unittest.cc
@@ -0,0 +1,162 @@
+// Copyright 2020 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 "cast/streaming/rpc_messenger.h"
+
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "cast/streaming/remoting.pb.h"
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+
+using testing::_;
+using testing::Invoke;
+using testing::Return;
+
+namespace openscreen {
+namespace cast {
+namespace {
+
+class FakeMessenger {
+ public:
+  void OnReceivedRpc(std::unique_ptr<RpcMessage> message) {
+    received_rpc_ = std::move(message);
+    received_count_++;
+  }
+
+  void OnSentRpc(const std::vector<uint8_t>& message) {
+    EXPECT_TRUE(sent_rpc_.ParseFromArray(message.data(), message.size()));
+    sent_count_++;
+  }
+
+  int received_count() const { return received_count_; }
+  const RpcMessage& received_rpc() const { return *received_rpc_; }
+
+  int sent_count() const { return sent_count_; }
+  const RpcMessage& sent_rpc() const { return sent_rpc_; }
+
+  void set_handle(RpcMessenger::Handle handle) { handle_ = handle; }
+  RpcMessenger::Handle handle() { return handle_; }
+
+ private:
+  std::unique_ptr<RpcMessage> received_rpc_;
+  int received_count_ = 0;
+
+  RpcMessage sent_rpc_;
+  int sent_count_ = 0;
+
+  RpcMessenger::Handle handle_ = -1;
+};
+
+}  // namespace
+
+class RpcMessengerTest : public testing::Test {
+ protected:
+  void SetUp() override {
+    fake_messenger_ = std::make_unique<FakeMessenger>();
+    ASSERT_FALSE(fake_messenger_->received_count());
+
+    rpc_messenger_ = std::make_unique<RpcMessenger>(
+        [p = fake_messenger_.get()](std::vector<uint8_t> message) {
+          p->OnSentRpc(message);
+        });
+
+    const auto handle = rpc_messenger_->GetUniqueHandle();
+    fake_messenger_->set_handle(handle);
+    rpc_messenger_->RegisterMessageReceiverCallback(
+        handle,
+        [p = fake_messenger_.get()](std::unique_ptr<RpcMessage> message) {
+          p->OnReceivedRpc(std::move(message));
+        });
+  }
+
+  void ProcessMessage(const RpcMessage& rpc) {
+    std::vector<uint8_t> message(rpc.ByteSizeLong());
+    rpc.SerializeToArray(message.data(), message.size());
+    rpc_messenger_->ProcessMessageFromRemote(message.data(), message.size());
+  }
+
+  std::unique_ptr<FakeMessenger> fake_messenger_;
+  std::unique_ptr<RpcMessenger> rpc_messenger_;
+};
+
+TEST_F(RpcMessengerTest, TestProcessMessageFromRemoteRegistered) {
+  RpcMessage rpc;
+  rpc.set_handle(fake_messenger_->handle());
+  ProcessMessage(rpc);
+  ASSERT_EQ(1, fake_messenger_->received_count());
+}
+
+TEST_F(RpcMessengerTest, TestProcessMessageFromRemoteUnregistered) {
+  RpcMessage rpc;
+  rpc_messenger_->UnregisterMessageReceiverCallback(fake_messenger_->handle());
+  ProcessMessage(rpc);
+  ASSERT_EQ(0, fake_messenger_->received_count());
+}
+
+TEST_F(RpcMessengerTest, CanSendMultipleMessages) {
+  for (int i = 0; i < 10; ++i) {
+    rpc_messenger_->SendMessageToRemote(RpcMessage{});
+  }
+  EXPECT_EQ(10, fake_messenger_->sent_count());
+}
+
+TEST_F(RpcMessengerTest, SendMessageCallback) {
+  // Send message for RPC messenger to process.
+  RpcMessage sent_rpc;
+  sent_rpc.set_handle(fake_messenger_->handle());
+  sent_rpc.set_proc(RpcMessage::RPC_R_SETVOLUME);
+  sent_rpc.set_double_value(2.3);
+  rpc_messenger_->SendMessageToRemote(sent_rpc);
+
+  // Check if received message is identical to the one sent earlier.
+  ASSERT_EQ(1, fake_messenger_->sent_count());
+  const RpcMessage& message = fake_messenger_->sent_rpc();
+  ASSERT_EQ(fake_messenger_->handle(), message.handle());
+  ASSERT_EQ(RpcMessage::RPC_R_SETVOLUME, message.proc());
+  ASSERT_EQ(2.3, message.double_value());
+}
+
+TEST_F(RpcMessengerTest, ProcessMessageWithRegisteredHandle) {
+  // Send message for RPC messenger to process.
+  RpcMessage sent_rpc;
+  sent_rpc.set_handle(fake_messenger_->handle());
+  sent_rpc.set_proc(RpcMessage::RPC_DS_INITIALIZE);
+  sent_rpc.set_integer_value(4004);
+  ProcessMessage(sent_rpc);
+
+  // Checks if received message is identical to the one sent earlier.
+  ASSERT_EQ(1, fake_messenger_->received_count());
+  const RpcMessage& received_rpc = fake_messenger_->received_rpc();
+  ASSERT_EQ(fake_messenger_->handle(), received_rpc.handle());
+  ASSERT_EQ(RpcMessage::RPC_DS_INITIALIZE, received_rpc.proc());
+  ASSERT_EQ(4004, received_rpc.integer_value());
+}
+
+TEST_F(RpcMessengerTest, ProcessMessageWithUnregisteredHandle) {
+  // Send message for RPC messenger to process.
+  RpcMessage sent_rpc;
+  RpcMessenger::Handle different_handle = fake_messenger_->handle() + 1;
+  sent_rpc.set_handle(different_handle);
+  sent_rpc.set_proc(RpcMessage::RPC_R_SETVOLUME);
+  sent_rpc.set_double_value(4.5);
+  ProcessMessage(sent_rpc);
+
+  // We shouldn't have gotten the message since the handle is different.
+  ASSERT_EQ(0, fake_messenger_->received_count());
+}
+
+TEST_F(RpcMessengerTest, Registration) {
+  const auto handle = fake_messenger_->handle();
+  ASSERT_TRUE(rpc_messenger_->IsRegisteredForTesting(handle));
+
+  rpc_messenger_->UnregisterMessageReceiverCallback(handle);
+  ASSERT_FALSE(rpc_messenger_->IsRegisteredForTesting(handle));
+}
+
+}  // namespace cast
+}  // namespace openscreen