content/test/mock_google_streaming_server.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_TEST_SPEECH_MOCK_GOOGLE_STREAMING_SERVER_H_
   6 #define CONTENT_TEST_SPEECH_MOCK_GOOGLE_STREAMING_SERVER_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "content/public/common/speech_recognition_result.h"
  10 #include "net/url_request/test_url_fetcher_factory.h"
  11
  12 namespace content {
  13
  14 struct SpeechRecognitionResult;
  15
  16 // Provides a mock implementation of the Google remote streaming speech
  17 // recognition webservice, exploiting the TestURLFetcher to extract request
  18 // parameters and provide forged JSON responses back to the client.
  19 // It is intended for closing the server-side loop in speech tests that involve
  20 // the GoogleStreamingRemoteEngine client.
  21 class MockGoogleStreamingServer : public net::TestURLFetcherDelegateForTests {
  22  public:
  23   class Delegate {
  24    public:
  25     virtual void OnClientConnected() = 0;
  26     virtual void OnClientAudioUpload() = 0;
  27     virtual void OnClientAudioUploadComplete() = 0;
  28     virtual void OnClientDisconnected() = 0;
  29   };
  30
  31   explicit MockGoogleStreamingServer(Delegate* delegate);
  32   virtual ~MockGoogleStreamingServer();
  33
  34   // net::TestURLFetcherDelegateForTests implementation.
  35   virtual void OnRequestStart(int fetcher_id) OVERRIDE;
  36   virtual void OnChunkUpload(int fetcher_id) OVERRIDE;
  37   virtual void OnRequestEnd(int fetcher_id) OVERRIDE;
  38
  39   void SimulateResult(const content::SpeechRecognitionResult& result);
  40   void SimulateServerFailure();
  41   void SimulateMalformedResponse();
  42
  43   // Retrieves the language parmeter for the request (e.g., lang=en-US).
  44   const std::string& GetRequestLanguage() const;
  45
  46   // Retrieves the grammar parmeter for the request (e.g., lm=http://url/g.xml).
  47   const std::string& GetRequestGrammar() const;
  48
  49  private:
  50   void SimulateServerResponse(bool success, const std::string& http_response);
  51   net::TestURLFetcher* GetURLFetcher(bool downstream) const;
  52
  53   Delegate* delegate_;
  54   int kDownstreamUrlFetcherId;
  55   int kUpstreamUrlFetcherId;
  56   net::TestURLFetcherFactory url_fetcher_factory_;
  57
  58   // Request arguments extracted by the HTTP query string.
  59   std::string request_language;
  60   std::string request_grammar;
  61
  62   DISALLOW_COPY_AND_ASSIGN(MockGoogleStreamingServer);
  63 };
  64
  65 }  // namespace content
  66
  67 #endif  // CONTENT_TEST_SPEECH_MOCK_GOOGLE_STREAMING_SERVER_H_