Translate: introduce unittest for TranslateHelper

chrome/renderer/translate_helper.h

 // 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.
 
 #ifndef CHROME_RENDERER_TRANSLATE_HELPER_H_
 #define CHROME_RENDERER_TRANSLATE_HELPER_H_
 
 #include <string>
 
+#include "base/gtest_prod_util.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/common/translate_errors.h"
 #include "content/public/renderer/render_view_observer.h"
 
 namespace WebKit {
 class WebDocument;
 class WebFrame;
 }
 
 // This class deals with page translation.
 // There is one TranslateHelper per RenderView.
 
 class TranslateHelper : public content::RenderViewObserver {
  public:
   explicit TranslateHelper(content::RenderView* render_view);
   virtual ~TranslateHelper();
 
   // Informs us that the page's text has been extracted.
   void PageCaptured(const string16& contents);
 
  protected:
-  // Convert language code to the one used in server supporting list.
-  static void ConvertLanguageCodeSynonym(std::string* code);
-
   // The following methods are protected so they can be overridden in
   // unit-tests.
   void OnTranslatePage(int page_id,
                        const std::string& translate_script,
                        const std::string& source_lang,
                        const std::string& target_lang);
   void OnRevertTranslation(int page_id);
 
   // Returns true if the translate library is available, meaning the JavaScript
   // has already been injected in that page.
@@ skipping 17 matching lines @@
   // Asks the Translate element in the page what the language of the page is.
   // Can only be called if a translation has happened and was successful.
   // Returns the language code on success, an empty string on failure.
   virtual std::string GetOriginalPageLanguage();
 
   // Used in unit-tests. Makes the various tasks be posted immediately so that
   // the tests don't have to wait before checking states.
   virtual bool DontDelayTasks();
 
  private:
+  FRIEND_TEST_ALL_PREFIXES(TranslateHelperTest, LanguageCodeSynonyms);
+
+  // Convert language code to the one used in server supporting list.
+  static void ConvertLanguageCodeSynonym(std::string* code);
+
   // Returns whether the page associated with |document| is a candidate for
   // translation.  Some pages can explictly specify (via a meta-tag) that they
   // should not be translated.
   static bool IsPageTranslatable(WebKit::WebDocument* document);
 
 #if defined(ENABLE_LANGUAGE_DETECTION)
   // Returns the ISO 639_1 language code of the specified |text|, or 'unknown'
   // if it failed.
   static std::string DetermineTextLanguage(const string16& text);
 #endif
@@ skipping 46 matching lines @@
   std::string source_lang_;
   std::string target_lang_;
 
   // Method factory used to make calls to TranslatePageImpl.
   base::WeakPtrFactory<TranslateHelper> weak_method_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TranslateHelper);
 };
 
 #endif  // CHROME_RENDERER_TRANSLATE_HELPER_H_