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      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_
     68