diff -r 000000000000 -r 6474c204b198 content/media/webspeech/recognition/test/FakeSpeechRecognitionService.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/media/webspeech/recognition/test/FakeSpeechRecognitionService.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,110 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsThreadUtils.h"
+
+#include "FakeSpeechRecognitionService.h"
+
+#include "SpeechRecognition.h"
+#include "SpeechRecognitionAlternative.h"
+#include "SpeechRecognitionResult.h"
+#include "SpeechRecognitionResultList.h"
+#include "nsIObserverService.h"
+#include "mozilla/Services.h"
+
+namespace mozilla {
+
+using namespace dom;
+
+NS_IMPL_ISUPPORTS(FakeSpeechRecognitionService, nsISpeechRecognitionService, nsIObserver)
+
+FakeSpeechRecognitionService::FakeSpeechRecognitionService()
+{
+}
+
+FakeSpeechRecognitionService::~FakeSpeechRecognitionService()
+{
+}
+
+NS_IMETHODIMP
+FakeSpeechRecognitionService::Initialize(WeakPtr<SpeechRecognition> aSpeechRecognition)
+{
+  mRecognition = aSpeechRecognition;
+  nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
+  obs->AddObserver(this, SPEECH_RECOGNITION_TEST_EVENT_REQUEST_TOPIC, false);
+  obs->AddObserver(this, SPEECH_RECOGNITION_TEST_END_TOPIC, false);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+FakeSpeechRecognitionService::ProcessAudioSegment(AudioSegment* aAudioSegment)
+{
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+FakeSpeechRecognitionService::SoundEnd()
+{
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+FakeSpeechRecognitionService::Abort()
+{
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+FakeSpeechRecognitionService::Observe(nsISupports* aSubject, const char* aTopic, const char16_t* aData)
+{
+  MOZ_ASSERT(mRecognition->mTestConfig.mFakeRecognitionService,
+             "Got request to fake recognition service event, but "
+             TEST_PREFERENCE_FAKE_RECOGNITION_SERVICE " is not set");
+
+  if (!strcmp(aTopic, SPEECH_RECOGNITION_TEST_END_TOPIC)) {
+    nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
+    obs->RemoveObserver(this, SPEECH_RECOGNITION_TEST_EVENT_REQUEST_TOPIC);
+    obs->RemoveObserver(this, SPEECH_RECOGNITION_TEST_END_TOPIC);
+
+    return NS_OK;
+  }
+
+  const nsDependentString eventName = nsDependentString(aData);
+
+  if (eventName.EqualsLiteral("EVENT_RECOGNITIONSERVICE_ERROR")) {
+    mRecognition->DispatchError(SpeechRecognition::EVENT_RECOGNITIONSERVICE_ERROR,
+                                SpeechRecognitionErrorCode::Network, // TODO different codes?
+                                NS_LITERAL_STRING("RECOGNITIONSERVICE_ERROR test event"));
+
+  } else if (eventName.EqualsLiteral("EVENT_RECOGNITIONSERVICE_FINAL_RESULT")) {
+    nsRefPtr<SpeechEvent> event =
+      new SpeechEvent(mRecognition,
+                      SpeechRecognition::EVENT_RECOGNITIONSERVICE_FINAL_RESULT);
+
+    event->mRecognitionResultList = BuildMockResultList();
+    NS_DispatchToMainThread(event);
+  }
+
+  return NS_OK;
+}
+
+SpeechRecognitionResultList*
+FakeSpeechRecognitionService::BuildMockResultList()
+{
+  SpeechRecognitionResultList* resultList = new SpeechRecognitionResultList(mRecognition);
+  SpeechRecognitionResult* result = new SpeechRecognitionResult(mRecognition);
+  SpeechRecognitionAlternative* alternative = new SpeechRecognitionAlternative(mRecognition);
+
+  alternative->mTranscript = NS_LITERAL_STRING("Mock final result");
+  alternative->mConfidence = 0.0f;
+
+  result->mItems.AppendElement(alternative);
+  resultList->mItems.AppendElement(result);
+
+  return resultList;
+}
+
+} // namespace mozilla