chrome/browser/language_usage_metrics_unittest.cc

   1 // Copyright (c) 2011 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 #include "chrome/browser/language_usage_metrics.h"
   6
   7 #include "testing/gtest/include/gtest/gtest.h"
   8
   9 TEST(LanguageUsageMetricsTest, ParseAcceptLanguages) {
  10   std::set<int> language_set;
  11   std::set<int>::const_iterator it;
  12
  13   const int ENGLISH = 25966;
  14   const int SPANISH = 25971;
  15   const int JAPANESE = 27233;
  16
  17   // Basic single language case.
  18   LanguageUsageMetrics::ParseAcceptLanguages("ja", &language_set);
  19   EXPECT_EQ(1U, language_set.size());
  20   EXPECT_EQ(JAPANESE, *language_set.begin());
  21
  22   // Empty language.
  23   LanguageUsageMetrics::ParseAcceptLanguages(std::string(), &language_set);
  24   EXPECT_EQ(0U, language_set.size());
  25
  26   // Country code is ignored.
  27   LanguageUsageMetrics::ParseAcceptLanguages("ja-JP", &language_set);
  28   EXPECT_EQ(1U, language_set.size());
  29   EXPECT_EQ(JAPANESE, *language_set.begin());
  30
  31   // Case is ignored.
  32   LanguageUsageMetrics::ParseAcceptLanguages("Ja-jP", &language_set);
  33   EXPECT_EQ(1U, language_set.size());
  34   EXPECT_EQ(JAPANESE, *language_set.begin());
  35
  36   // Underscore as the separator.
  37   LanguageUsageMetrics::ParseAcceptLanguages("ja_JP", &language_set);
  38   EXPECT_EQ(1U, language_set.size());
  39   EXPECT_EQ(JAPANESE, *language_set.begin());
  40
  41   // The result contains a same language code only once.
  42   LanguageUsageMetrics::ParseAcceptLanguages("ja-JP,ja", &language_set);
  43   EXPECT_EQ(1U, language_set.size());
  44   EXPECT_EQ(JAPANESE, *language_set.begin());
  45
  46   // Basic two languages case.
  47   LanguageUsageMetrics::ParseAcceptLanguages("en,ja", &language_set);
  48   EXPECT_EQ(2U, language_set.size());
  49   it = language_set.begin();
  50   EXPECT_EQ(ENGLISH, *it);
  51   EXPECT_EQ(JAPANESE, *++it);
  52
  53   // Multiple languages.
  54   LanguageUsageMetrics::ParseAcceptLanguages("ja-JP,en,es,ja,en-US",
  55                                              &language_set);
  56   EXPECT_EQ(3U, language_set.size());
  57   it = language_set.begin();
  58   EXPECT_EQ(ENGLISH, *it);
  59   EXPECT_EQ(SPANISH, *++it);
  60   EXPECT_EQ(JAPANESE, *++it);
  61
  62   // Two empty languages.
  63   LanguageUsageMetrics::ParseAcceptLanguages(",", &language_set);
  64   EXPECT_EQ(0U, language_set.size());
  65
  66   // Trailing comma.
  67   LanguageUsageMetrics::ParseAcceptLanguages("ja,", &language_set);
  68   EXPECT_EQ(1U, language_set.size());
  69   EXPECT_EQ(JAPANESE, *language_set.begin());
  70
  71   // Leading comma.
  72   LanguageUsageMetrics::ParseAcceptLanguages(",es", &language_set);
  73   EXPECT_EQ(1U, language_set.size());
  74   EXPECT_EQ(SPANISH, *language_set.begin());
  75
  76   // Combination of invalid and valid.
  77   LanguageUsageMetrics::ParseAcceptLanguages("1234,en", &language_set);
  78   EXPECT_EQ(1U, language_set.size());
  79   it = language_set.begin();
  80   EXPECT_EQ(ENGLISH, *it);
  81 }
  82
  83 TEST(LanguageUsageMetricsTest, ToLanguageCode) {
  84   const int SPANISH = 25971;
  85   const int JAPANESE = 27233;
  86
  87   // Basic case.
  88   EXPECT_EQ(JAPANESE, LanguageUsageMetrics::ToLanguageCode("ja"));
  89
  90   // Case is ignored.
  91   EXPECT_EQ(SPANISH, LanguageUsageMetrics::ToLanguageCode("Es"));
  92
  93   // Coutry code is ignored.
  94   EXPECT_EQ(JAPANESE, LanguageUsageMetrics::ToLanguageCode("ja-JP"));
  95
  96   // Invalid locales are considered as unknown language.
  97   EXPECT_EQ(0, LanguageUsageMetrics::ToLanguageCode(std::string()));
  98   EXPECT_EQ(0, LanguageUsageMetrics::ToLanguageCode("1234"));
  99
 100   // "xx" is not acceptable because it doesn't exist in ISO 639-1 table.
 101   // However, LanguageUsageMetrics doesn't tell what code is valid.
 102   EXPECT_EQ(30840, LanguageUsageMetrics::ToLanguageCode("xx"));
 103 }