Move language detection to chrome/common/.

chrome/common/translate/language_detection_util_unittest.cc

 // Copyright (c) 2013 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 "chrome/renderer/translate/translate_helper.h"
+#include "chrome/common/translate/language_detection_util.h"
 
+#include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/common/chrome_constants.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-typedef testing::Test TranslateHelperTest;
+typedef testing::Test LanguageDetectionUtilTest;
 
 // Tests that well-known language code typos are fixed.
-TEST_F(TranslateHelperTest, LanguageCodeTypoCorrection) {
+TEST_F(LanguageDetectionUtilTest, LanguageCodeTypoCorrection) {
   std::string language;
 
   // Strip the second and later codes.
   language = std::string("ja,en");
-  TranslateHelper::CorrectLanguageCodeTypo(&language);
+  LanguageDetectionUtil::CorrectLanguageCodeTypo(&language);
   EXPECT_EQ("ja", language);
 
   // Replace dash with hyphen.
   language = std::string("ja_JP");
-  TranslateHelper::CorrectLanguageCodeTypo(&language);
+  LanguageDetectionUtil::CorrectLanguageCodeTypo(&language);
   EXPECT_EQ("ja-JP", language);
 
   // Correct wrong cases.
   language = std::string("JA-jp");
-  TranslateHelper::CorrectLanguageCodeTypo(&language);
+  LanguageDetectionUtil::CorrectLanguageCodeTypo(&language);
   EXPECT_EQ("ja-JP", language);
 }
 
 // Tests if the language codes' format is invalid.
-TEST_F(TranslateHelperTest, IsValidLanguageCode) {
+TEST_F(LanguageDetectionUtilTest, IsValidLanguageCode) {
   std::string language;
 
   language = std::string("ja");
-  EXPECT_TRUE(TranslateHelper::IsValidLanguageCode(language));
+  EXPECT_TRUE(LanguageDetectionUtil::IsValidLanguageCode(language));
 
   language = std::string("ja-JP");
-  EXPECT_TRUE(TranslateHelper::IsValidLanguageCode(language));
+  EXPECT_TRUE(LanguageDetectionUtil::IsValidLanguageCode(language));
 
   language = std::string("ceb");
-  EXPECT_TRUE(TranslateHelper::IsValidLanguageCode(language));
+  EXPECT_TRUE(LanguageDetectionUtil::IsValidLanguageCode(language));
 
   language = std::string("ceb-XX");
-  EXPECT_TRUE(TranslateHelper::IsValidLanguageCode(language));
+  EXPECT_TRUE(LanguageDetectionUtil::IsValidLanguageCode(language));
 
   // Invalid because the sub code consists of a number.
   language = std::string("utf-8");
-  EXPECT_FALSE(TranslateHelper::IsValidLanguageCode(language));
+  EXPECT_FALSE(LanguageDetectionUtil::IsValidLanguageCode(language));
 
   // Invalid because of six characters after hyphen.
   language = std::string("ja-YUKARI");
-  EXPECT_FALSE(TranslateHelper::IsValidLanguageCode(language));
+  EXPECT_FALSE(LanguageDetectionUtil::IsValidLanguageCode(language));
 
   // Invalid because of four characters.
   language = std::string("DHMO");
-  EXPECT_FALSE(TranslateHelper::IsValidLanguageCode(language));
+  EXPECT_FALSE(LanguageDetectionUtil::IsValidLanguageCode(language));
 }
 
 // Tests that similar language table works.
-TEST_F(TranslateHelperTest, SimilarLanguageCode) {
-  EXPECT_TRUE(TranslateHelper::IsSameOrSimilarLanguages("en", "en"));
-  EXPECT_FALSE(TranslateHelper::IsSameOrSimilarLanguages("en", "ja"));
-  EXPECT_TRUE(TranslateHelper::IsSameOrSimilarLanguages("bs", "hr"));
-  EXPECT_TRUE(TranslateHelper::IsSameOrSimilarLanguages("sr-ME", "sr"));
-  EXPECT_TRUE(TranslateHelper::IsSameOrSimilarLanguages("ne", "hi"));
-  EXPECT_FALSE(TranslateHelper::IsSameOrSimilarLanguages("bs", "hi"));
+TEST_F(LanguageDetectionUtilTest, SimilarLanguageCode) {
+  EXPECT_TRUE(LanguageDetectionUtil::IsSameOrSimilarLanguages("en", "en"));
+  EXPECT_FALSE(LanguageDetectionUtil::IsSameOrSimilarLanguages("en", "ja"));
+  EXPECT_TRUE(LanguageDetectionUtil::IsSameOrSimilarLanguages("bs", "hr"));
+  EXPECT_TRUE(LanguageDetectionUtil::IsSameOrSimilarLanguages("sr-ME", "sr"));
+  EXPECT_TRUE(LanguageDetectionUtil::IsSameOrSimilarLanguages("ne", "hi"));
+  EXPECT_FALSE(LanguageDetectionUtil::IsSameOrSimilarLanguages("bs", "hi"));
 }
 
 // Tests that well-known languages which often have wrong server configuration
 // are handles.
-TEST_F(TranslateHelperTest, WellKnownWrongConfiguration) {
-  EXPECT_TRUE(TranslateHelper::MaybeServerWrongConfiguration("en", "ja"));
-  EXPECT_TRUE(TranslateHelper::MaybeServerWrongConfiguration("en-US", "ja"));
-  EXPECT_TRUE(TranslateHelper::MaybeServerWrongConfiguration("en", "zh-CN"));
-  EXPECT_FALSE(TranslateHelper::MaybeServerWrongConfiguration("ja", "en"));
-  EXPECT_FALSE(TranslateHelper::MaybeServerWrongConfiguration("en", "he"));
+TEST_F(LanguageDetectionUtilTest, WellKnownWrongConfiguration) {
+  EXPECT_TRUE(LanguageDetectionUtil::MaybeServerWrongConfiguration("en", "ja"));
+  EXPECT_TRUE(LanguageDetectionUtil::MaybeServerWrongConfiguration("en-US",
+                                                                   "ja"));
+  EXPECT_TRUE(LanguageDetectionUtil::MaybeServerWrongConfiguration("en",
+                                                                   "zh-CN"));
+  EXPECT_FALSE(LanguageDetectionUtil::MaybeServerWrongConfiguration("ja",
+                                                                    "en"));
+  EXPECT_FALSE(LanguageDetectionUtil::MaybeServerWrongConfiguration("en",
+                                                                    "he"));
 }
 
 // Tests that the language meta tag providing wrong information is ignored by
-// TranslateHelper due to disagreement between meta tag and CLD.
-TEST_F(TranslateHelperTest, CLDDisagreeWithWrongLanguageCode) {
-  string16 contents = ASCIIToUTF16(
+// LanguageDetectionUtil due to disagreement between meta tag and CLD.
+TEST_F(LanguageDetectionUtilTest, CLDDisagreeWithWrongLanguageCode) {
+  base::string16 contents = ASCIIToUTF16(
       "<html><head><meta http-equiv='Content-Language' content='ja'></head>"
       "<body>This is a page apparently written in English. Even though "
       "content-language is provided, the value will be ignored if the value "
       "is suspicious.</body></html>");
   std::string cld_language;
   bool is_cld_reliable;
-  std::string language =
-      TranslateHelper::DeterminePageLanguage(std::string("ja"), std::string(),
-                                             contents, &cld_language,
-                                             &is_cld_reliable);
+  std::string language = LanguageDetectionUtil::DeterminePageLanguage(
+      std::string("ja"), std::string(), contents, &cld_language,
+      &is_cld_reliable);
   EXPECT_EQ(chrome::kUnknownLanguageCode, language);
   EXPECT_EQ("en", cld_language);
   EXPECT_TRUE(is_cld_reliable);
 }
 
 // Tests that the language meta tag providing "en-US" style information is
 // agreed by CLD.
-TEST_F(TranslateHelperTest, CLDAgreeWithLanguageCodeHavingCountryCode) {
-  string16 contents = ASCIIToUTF16(
+TEST_F(LanguageDetectionUtilTest, CLDAgreeWithLanguageCodeHavingCountryCode) {
+  base::string16 contents = ASCIIToUTF16(
       "<html><head><meta http-equiv='Content-Language' content='en-US'></head>"
       "<body>This is a page apparently written in English. Even though "
       "content-language is provided, the value will be ignored if the value "
       "is suspicious.</body></html>");
   std::string cld_language;
   bool is_cld_reliable;
-  std::string language =
-      TranslateHelper::DeterminePageLanguage(std::string("en-US"),
-                                             std::string(), contents,
-                                             &cld_language, &is_cld_reliable);
+  std::string language = LanguageDetectionUtil::DeterminePageLanguage(
+      std::string("en-US"), std::string(), contents, &cld_language,
+      &is_cld_reliable);
   EXPECT_EQ("en-US", language);
   EXPECT_EQ("en", cld_language);
   EXPECT_TRUE(is_cld_reliable);
 }
 
 // Tests that the language meta tag providing wrong information is ignored and
-// CLD's language will be adopted by TranslateHelper due to an invalid meta tag.
-TEST_F(TranslateHelperTest, InvalidLanguageMetaTagProviding) {
-  string16 contents = ASCIIToUTF16(
+// CLD's language will be adopted by LanguageDetectionUtil due to an invalid
+// meta tag.
+TEST_F(LanguageDetectionUtilTest, InvalidLanguageMetaTagProviding) {
+  base::string16 contents = ASCIIToUTF16(
       "<html><head><meta http-equiv='Content-Language' content='utf-8'></head>"
       "<body>This is a page apparently written in English. Even though "
       "content-language is provided, the value will be ignored and CLD's"
       " language will be adopted if the value is invalid.</body></html>");
   std::string cld_language;
   bool is_cld_reliable;
-  std::string language =
-      TranslateHelper::DeterminePageLanguage(std::string("utf-8"),
-                                             std::string(), contents,
-                                             &cld_language, &is_cld_reliable);
+  std::string language = LanguageDetectionUtil::DeterminePageLanguage(
+      std::string("utf-8"), std::string(), contents, &cld_language,
+      &is_cld_reliable);
   EXPECT_EQ("en", language);
   EXPECT_EQ("en", cld_language);
   EXPECT_TRUE(is_cld_reliable);
 }
 
 // Tests that the language meta tag providing wrong information is ignored
 // because of valid html lang attribute.
-TEST_F(TranslateHelperTest, AdoptHtmlLang) {
-  string16 contents = ASCIIToUTF16(
+TEST_F(LanguageDetectionUtilTest, AdoptHtmlLang) {
+  base::string16 contents = ASCIIToUTF16(
       "<html lang='en'><head><meta http-equiv='Content-Language' content='ja'>"
       "</head><body>This is a page apparently written in English. Even though "
       "content-language is provided, the value will be ignored if the value "
       "is suspicious.</body></html>");
   std::string cld_language;
   bool is_cld_reliable;
-  std::string language =
-      TranslateHelper::DeterminePageLanguage(std::string("ja"),
-                                             std::string("en"),
-                                             contents, &cld_language,
-                                             &is_cld_reliable);
+  std::string language = LanguageDetectionUtil::DeterminePageLanguage(
+      std::string("ja"), std::string("en"), contents, &cld_language,
+      &is_cld_reliable);
   EXPECT_EQ("en", language);
   EXPECT_EQ("en", cld_language);
   EXPECT_TRUE(is_cld_reliable);
 }