Add API tests to the experimental Speech Input API.

chrome/browser/extensions/speech_input/extension_speech_input_apitest.cc

Index: chrome/browser/extensions/speech_input/extension_speech_input_apitest.cc
diff --git a/chrome/browser/extensions/speech_input/extension_speech_input_apitest.cc b/chrome/browser/extensions/speech_input/extension_speech_input_apitest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..780212b84342034c4e5ae1b29a6ff0446f79693c
--- /dev/null
+++ b/chrome/browser/extensions/speech_input/extension_speech_input_apitest.cc
@@ -0,0 +1,195 @@
+// Copyright (c) 2011 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 "base/bind.h"
+#include "base/command_line.h"
+#include "base/utf_string_conversions.h"
+#include "chrome/browser/extensions/extension_apitest.h"
+#include "chrome/browser/extensions/speech_input/extension_speech_input_api.h"
+#include "chrome/browser/extensions/speech_input/extension_speech_input_manager.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/common/chrome_notification_types.h"
+#include "chrome/common/chrome_switches.h"
+#include "content/browser/speech/speech_recognizer.h"
+#include "content/common/speech_input_result.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace net {
+class URLRequestContextGetter;
+}
+
+// Mock class used to test the extension speech input API.
+class ExtensionSpeechInputApiTest : public ExtensionApiTest,
+                                    public ExtensionSpeechInterface {
+ public:
+  ExtensionSpeechInputApiTest();
+  virtual ~ExtensionSpeechInputApiTest();
+
+  void SetRecordingDevicesAvailable(bool available) {
+    recording_devices_available_ = available;
+  }
+
+  void SetRecognitionError(speech_input::SpeechInputError error) {
+    next_error_ = error;
+  }
+
+  void SetRecognitionResult(const speech_input::SpeechInputResult& result) {
+    next_result_ = result;
+  }
+
+  void SetRecognitionDelay(int result_delay_ms) {
+    result_delay_ms_ = result_delay_ms;
+  }
+
+  // Used as delay when the corresponding call should not be dispatched.
+  static const int kDontDispatchCall = -1;
+
+  // ExtensionApiTest methods.
+  virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
+    ExtensionApiTest::SetUpCommandLine(command_line);
+    command_line->AppendSwitch(switches::kEnableExperimentalExtensionApis);
+  }
+
+  // ExtensionSpeechInterface methods.
+  virtual bool HasAudioInputDevices() OVERRIDE {
+    return recording_devices_available_;
+  }
+
+  virtual bool IsRecordingInProcess() OVERRIDE {
+    // Only the mock recognizer is supposed to be recording during testing.
+    return HasValidRecognizer();
+  }
+
+  virtual bool HasValidRecognizer() OVERRIDE {
+    return recognizer_is_valid_;
+  }
+
+  virtual void StartRecording(
+      speech_input::SpeechRecognizerDelegate* delegate,
+      net::URLRequestContextGetter* context_getter,
+      int caller_id,
+      const std::string& language,
+      const std::string& grammar,
+      bool filter_profanities) OVERRIDE;
+
+  virtual void StopRecording(bool recognition_failed) OVERRIDE;
+
+  ExtensionSpeechInputManager* GetManager() {
+    return ExtensionSpeechInputManager::GetForProfile(browser()->profile());
+  }
+
+  // Auxiliary class used to hook the API manager into the test during its
+  // lifetime. Required since browser() is not available during the set up
+  // or tear down callbacks, or during the test class construction.
+  class AutoManagerHook {
+   public:
+    explicit AutoManagerHook(ExtensionSpeechInputApiTest* test)
+        : test_(test) {
+      test_->GetManager()->SetExtensionSpeechInterface(test_);
+    }
+
+    ~AutoManagerHook() {
+      test_->GetManager()->SetExtensionSpeechInterface(NULL);
+    }
+
+   private:
+    ExtensionSpeechInputApiTest* test_;
+  };
+
+ private:
+  void ProvideResults(int caller_id);
+
+  bool recording_devices_available_;
+  bool recognizer_is_valid_;
+  speech_input::SpeechInputError next_error_;
+  speech_input::SpeechInputResult next_result_;
+  int result_delay_ms_;
+};
+
+ExtensionSpeechInputApiTest::ExtensionSpeechInputApiTest()
+    : recording_devices_available_(true),
+      recognizer_is_valid_(false),
+      next_error_(speech_input::kErrorNone),
+      result_delay_ms_(0) {
+}
+
+ExtensionSpeechInputApiTest::~ExtensionSpeechInputApiTest() {
+}
+
+void ExtensionSpeechInputApiTest::StartRecording(
+      speech_input::SpeechRecognizerDelegate* delegate,
+      net::URLRequestContextGetter* context_getter,
+      int caller_id,
+      const std::string& language,
+      const std::string& grammar,
+      bool filter_profanities) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  recognizer_is_valid_ = true;
+
+  // Notify that recording started.
+  MessageLoop::current()->PostDelayedTask(FROM_HERE,
+      base::Bind(&ExtensionSpeechInputManager::DidStartReceivingAudio,
+      GetManager(), caller_id), 0);
+
+  // Notify sound start in the input device.
+  MessageLoop::current()->PostDelayedTask(FROM_HERE,
+      base::Bind(&ExtensionSpeechInputManager::DidStartReceivingSpeech,
+      GetManager(), caller_id), 0);
+
+  if (result_delay_ms_ != kDontDispatchCall) {
+    // Dispatch the recognition results.
+    MessageLoop::current()->PostDelayedTask(FROM_HERE,
+        base::Bind(&ExtensionSpeechInputApiTest::ProvideResults, this,
+        caller_id), result_delay_ms_);
+  }
+}
+
+void ExtensionSpeechInputApiTest::StopRecording(bool recognition_failed) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  recognizer_is_valid_ = false;
+}
+
+void ExtensionSpeechInputApiTest::ProvideResults(int caller_id) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+
+  if (next_error_ != speech_input::kErrorNone) {
+    GetManager()->OnRecognizerError(caller_id, next_error_);
+    return;
+  }
+
+  GetManager()->DidStopReceivingSpeech(caller_id);
+  GetManager()->SetRecognitionResult(caller_id, next_result_);
+}
+
+// Every test should leave the manager in the idle state when finished.
+IN_PROC_BROWSER_TEST_F(ExtensionSpeechInputApiTest, StartStopTest) {
+  AutoManagerHook hook(this);
+
+  SetRecognitionDelay(kDontDispatchCall);
+  ASSERT_TRUE(RunExtensionTest("speech_input/start_stop")) << message_;
+}
+
+IN_PROC_BROWSER_TEST_F(ExtensionSpeechInputApiTest, NoDevicesAvailable) {
+  AutoManagerHook hook(this);
+
+  SetRecordingDevicesAvailable(false);
+  ASSERT_TRUE(RunExtensionTest("speech_input/start_error")) << message_;
+}
+
+IN_PROC_BROWSER_TEST_F(ExtensionSpeechInputApiTest, RecognitionSuccessful) {
+  AutoManagerHook hook(this);
+
+  speech_input::SpeechInputResult result;
+  result.hypotheses.push_back(
+      speech_input::SpeechInputHypothesis(UTF8ToUTF16("this is a test"), 0.99));
+  SetRecognitionResult(result);
+  ASSERT_TRUE(RunExtensionTest("speech_input/recognition")) << message_;
+}
+
+IN_PROC_BROWSER_TEST_F(ExtensionSpeechInputApiTest, RecognitionError) {
+  AutoManagerHook hook(this);
+
+  SetRecognitionError(speech_input::kErrorNetwork);
+  ASSERT_TRUE(RunExtensionTest("speech_input/recognition_error")) << message_;
+}