Mojo C++ bindings: introduce MultiplexRouter and related classes.

mojo/public/cpp/bindings/tests/router_test_util.h

+// 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.
+
+#ifndef MOJO_PUBLIC_CPP_BINDINGS_TESTS_ROUTER_TEST_UTIL_H_
+#define MOJO_PUBLIC_CPP_BINDINGS_TESTS_ROUTER_TEST_UTIL_H_
+
+#include <string>
+
+#include "mojo/public/cpp/bindings/message.h"
+
+namespace mojo {
+namespace test {
+
+class MessageQueue;
+
+void AllocRequestMessage(uint32_t name, const char* text, Message* message);
+void AllocResponseMessage(uint32_t name,
+                          const char* text,
+                          uint64_t request_id,
+                          Message* message);
+
+class MessageAccumulator : public MessageReceiver {
+ public:
+  explicit MessageAccumulator(MessageQueue* queue);
+
+  bool Accept(Message* message) override;
+
+ private:
+  MessageQueue* queue_;
+};
+
+class ResponseGenerator : public MessageReceiverWithResponderStatus {
+ public:
+  ResponseGenerator();
+
+  bool Accept(Message* message) override;
+
+  bool AcceptWithResponder(Message* message,
+                           MessageReceiverWithStatus* responder) override;
+
+  bool SendResponse(uint32_t name,
+                    uint64_t request_id,
+                    const char* request_string,
+                    MessageReceiver* responder);
+};
+
+class LazyResponseGenerator : public ResponseGenerator {
+ public:
+  LazyResponseGenerator();
+
+  ~LazyResponseGenerator() override;
+
+  bool AcceptWithResponder(Message* message,
+                           MessageReceiverWithStatus* responder) override;
+
+  bool has_responder() const { return !!responder_; }
+
+  bool responder_is_valid() const { return responder_->IsValid(); }
+
+  // Sends the response and delete the responder.
+  void CompleteWithResponse() { Complete(true); }
+
+  // Deletes the responder without sending a response.
+  void CompleteWithoutResponse() { Complete(false); }
+
+ private:
+  // Completes the request handling by deleting responder_. Optionally
+  // also sends a response.
+  void Complete(bool send_response);
+
+  MessageReceiverWithStatus* responder_;
+  uint32_t name_;
+  uint64_t request_id_;
+  std::string request_string_;
+};
+
+}  // namespace test
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_CPP_BINDINGS_TESTS_ROUTER_TEST_UTIL_H_