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# -*- coding: utf-8 -*-
#
# Copyright (C) 2012-2015  Kouhei Sutou <kou@clear-code.com>
# Copyright (C) 2012  Hleb Valoshka
# Copyright (C) 2009-2010  Masao Mutoh
#
# License: Ruby's or LGPL
#
# This library is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

require 'locale'
require 'test/unit'

class TestDetectGeneral < Test::Unit::TestCase

  def setup
    Locale.init
    Locale.clear_all
    ENV["LC_ALL"] = nil
    ENV["LC_CTYPE"] = nil
    ENV["LC_MESSAGES"] = nil
    ENV["LANG"] = nil
    ENV["LANGUAGE"] = nil
  end

  def test_lc_all
    ENV["LC_ALL"] = "ja_JP.eucJP"
    ENV["LC_CTYPE"] = "fr_FR.ISO-8859-1"  #Ignored.
    ENV["LC_MESSAGES"] = "zh_CN.UTF-8"  #Ignored.
    ENV["LANG"] = "ko_KR.UTF-8"  #Ignored.
    ENV["LANGUAGE"] = nil

    lang = Locale.current[0]
    assert_equal Locale::Tag::Posix, lang.class
    assert_equal "ja", lang.language
    assert_equal "JP", lang.region
    assert_equal "eucJP", lang.charset
    assert_equal Locale::Tag::Posix.new("ja", "JP", "eucJP"), lang

    assert_equal "eucJP", Locale.charset
  end

  def test_lc_messages
    ENV["LC_ALL"] = nil
    ENV["LC_CTYPE"] = nil
    ENV["LC_MESSAGES"] = "ja_JP.eucJP"
    ENV["LANG"] = "ko_KR.UTF-8"  #Ignored except charset.
    ENV["LANGUAGE"] = nil

    lang = Locale.current[0]
    assert_equal Locale::Tag::Posix, lang.class
    assert_equal "ja", lang.language
    assert_equal "JP", lang.region
    assert_equal "eucJP", lang.charset
    assert_equal Locale::Tag::Posix.new("ja", "JP", "eucJP"), lang

    assert_equal "UTF-8", Locale.charset
  end

  def test_lc_messages_with_lc_ctype
    ENV["LC_ALL"] = nil
    ENV["LC_CTYPE"] = "fr_FR.ISO-8859-1"
    ENV["LC_MESSAGES"] = "ja_JP.eucJP"
    ENV["LANG"] = "ko_KR.UTF-8"  #Ignored.
    ENV["LANGUAGE"] = nil

    lang = Locale.current[0]
    assert_equal Locale::Tag::Posix, lang.class
    assert_equal "ja", lang.language
    assert_equal "JP", lang.region
    assert_equal "ISO-8859-1", lang.charset
    assert_equal Locale::Tag::Posix.new("ja", "JP", "ISO-8859-1"), lang

    assert_equal "ISO-8859-1", Locale.charset
  end

  def test_lang
    ENV["LC_ALL"] = nil
    ENV["LC_CTYPE"] = nil
    ENV["LC_MESSAGES"] = nil
    ENV["LANG"] = "ja_JP.eucJP"
    ENV["LANGUAGE"] = nil

    lang = Locale.current[0]
    assert_equal Locale::Tag::Posix, lang.class
    assert_equal "ja", lang.language
    assert_equal "JP", lang.region
    assert_equal "eucJP", lang.charset
    assert_equal Locale::Tag::Posix.new("ja", "JP", "eucJP"), lang

    assert_equal "eucJP", Locale.charset
  end

  def test_lang_with_ctype
    ENV["LC_ALL"] = nil
    ENV["LC_CTYPE"] = "fr_FR.ISO-8859-1"
    ENV["LC_MESSAGES"] = nil
    ENV["LANG"] = "ja_JP.eucJP"
    ENV["LANGUAGE"] = nil

    lang = Locale.current[0]
    assert_equal Locale::Tag::Posix, lang.class
    assert_equal "ja", lang.language
    assert_equal "JP", lang.region
    assert_equal "ISO-8859-1", lang.charset
    assert_equal Locale::Tag::Posix.new("ja", "JP", "ISO-8859-1"), lang

    assert_equal "ISO-8859-1", Locale.charset
  end

  def test_lang_complex
    ENV["LC_ALL"] = "zh_CN.UTF-8"  # Ignored.
    ENV["LC_CTYPE"] = "fr_FR.ISO-8859-1" #Ingored.
    ENV["LC_MESSAGES"] = "ko_KR.UTF-8" #Ingored.
    ENV["LANG"] = "en_US.UTF-8"  # Ignored.
    ENV["LANGUAGE"] ="ja_JP.eucJP:zh_CN.UTF-8"

    lang = Locale.current[0]
    assert_equal Locale::Tag::Posix, lang.class
    assert_equal "ja", lang.language
    assert_equal "JP", lang.region
    assert_equal "eucJP", lang.charset
    assert_equal Locale::Tag::Posix.new("ja", "JP", "eucJP"), lang

    # Use the LANG value (locale charmap don't use LANGUAGE) 
    assert_equal "UTF-8", Locale.charset
  end

  sub_test_case "#language" do
    test "LC_ALL" do
      ENV["LC_ALL"] = "ja_JP.Shift_JIS"
      ENV["LANGUAGE"] = "zh_CN.UTF-8:ja_JP"

      tags = Locale.current
      assert_equal Locale::Tag::Posix, tags[0].class
      assert_equal Locale::Tag::Posix, tags[1].class

      assert_equal "zh", tags.language
      assert_equal "CN", tags.region
      assert_equal "UTF-8", tags.charset

      assert_equal "zh", tags[0].language
      assert_equal "CN", tags[0].region
      assert_equal "UTF-8", tags[0].charset

      assert_equal "ja", tags[1].language
      assert_equal "JP", tags[1].region
      assert_equal nil, tags[1].charset

      assert_equal Locale::TagList.new([Locale::Tag::Posix.new("zh", "CN", "UTF-8"),
                   Locale::Tag::Posix.new("ja", "JP")]), tags

      assert_equal "Shift_JIS", Locale.charset
    end

    test "LC_ALL=C" do
      ENV["LC_ALL"] = "C"
      ENV["LANGUAGE"] = "zh_CN.UTF-8:ja_JP" # ignored

      assert_equal([Locale::Tag::Simple.new("en")],
                   Locale.current)
    end

    test "LC_MESSAGES=C" do
      ENV["LC_MESSAGES"] = "C"
      ENV["LANGUAGE"] = "zh_CN.UTF-8:ja_JP" # ignored

      assert_equal([Locale::Tag::Simple.new("en")],
                   Locale.current)
    end

    test "LANG=C" do
      ENV["LANG"] = "C"
      ENV["LANGUAGE"] = "zh_CN.UTF-8:ja_JP" # ignored

      assert_equal([Locale::Tag::Simple.new("en")],
                   Locale.current)
    end

    test "LC_ALL and LC_MESSAGES=C" do
      ENV["LC_ALL"] = "ja_JP.Shift_JIS"
      ENV["LC_MESSAGES"] = "C"
      ENV["LANGUAGE"] = "zh_CN.UTF-8:ja_JP"

      assert_equal([
                     Locale::Tag::Posix.new("zh", "CN", "UTF-8"),
                     Locale::Tag::Posix.new("ja", "JP"),
                   ],
                   Locale.current)
    end

    test "LC_ALL and LANG=C" do
      ENV["LC_ALL"] = "ja_JP.Shift_JIS"
      ENV["LANG"] = "C"
      ENV["LANGUAGE"] = "zh_CN.UTF-8:ja_JP"

      assert_equal([
                     Locale::Tag::Posix.new("zh", "CN", "UTF-8"),
                     Locale::Tag::Posix.new("ja", "JP"),
                   ],
                   Locale.current)
    end

    test "LC_ALL=C and LC_MESSAGES" do
      ENV["LC_ALL"] = "C"
      ENV["LC_MESSAGES"] = "ja_JP.Shift_JIS"
      ENV["LANGUAGE"] = "zh_CN.UTF-8:ja_JP" # ignored

      assert_equal([Locale::Tag::Simple.new("en")],
                   Locale.current)
    end

    test "LC_ALL=C and LANG" do
      ENV["LC_ALL"] = "C"
      ENV["LANG"] = "ja_JP.Shift_JIS"
      ENV["LANGUAGE"] = "zh_CN.UTF-8:ja_JP" # ignored

      assert_equal([Locale::Tag::Simple.new("en")],
                   Locale.current)
    end

    test "LC_MESSAGES=C and LANG" do
      ENV["LC_MESSAGES"] = "C"
      ENV["LANG"] = "ja_JP.Shift_JIS"
      ENV["LANGUAGE"] = "zh_CN.UTF-8:ja_JP" # ignored

      assert_equal([Locale::Tag::Simple.new("en")],
                   Locale.current)
    end

    test "strip" do
      ENV["LC_ALL"] = "ja_JP.Shift_JIS"
      ENV["LANGUAGE"] = nil

      tags = Locale.current
      assert_equal 1, tags.size
      assert_equal Locale::Tag::Posix, tags[0].class
      assert_equal "ja", tags.language
      assert_equal "ja", tags[0].language
      Locale.clear
      ENV["LANGUAGE"] = ""

      tags = Locale.current
      assert_equal 1, tags.size
      assert_equal Locale::Tag::Posix, tags[0].class
      assert_equal "ja", tags.language
      assert_equal "ja", tags[0].language
      Locale.clear
      ENV["LANGUAGE"] = "zh_CN.UTF-8:ja_JP"

      tags = Locale.current
      assert_equal 2, tags.size
      assert_equal Locale::Tag::Posix, tags[0].class
      assert_equal Locale::Tag::Posix, tags[1].class
      assert_equal "zh", tags.language
      assert_equal "zh", tags[0].language
      assert_equal "ja", tags[1].language
    end
  end

  def test_no_charset
    ENV["LC_ALL"] = "cs_CZ"

    lang = Locale.current[0]
    assert_equal Locale::Tag::Posix, lang.class

    assert_equal "cs", lang.language
    assert_equal "CZ", lang.region
    assert_equal nil, lang.charset
    assert_equal Locale::Tag::Posix.new("cs", "CZ"), lang

=begin
 This test doesn't work any environment such as Ubuntu.
 Because this method gets the system locale via "locale -a" command.
    if /linux|bsd/ =~ RUBY_PLATFORM
      assert_equal "ISO-8859-2", Locale.charset   
    end
=end
  end

  def test_default
    return unless /linux|bsd/ =~ RUBY_PLATFORM
    Locale.set_default("yo_NG")
    assert_equal Locale::Tag.parse("yo_NG"), Locale.default
    assert_equal Locale::Tag.parse("yo_NG"), Locale.current[0]
    Locale.set_default(nil)

    Locale.default = "fr"
    assert_equal Locale::Tag.parse("fr"), Locale.default
    assert_equal Locale::Tag.parse("fr"), Locale.current[0]
    Locale.default = nil
  end

  def test_current
    Locale.set_current("yo_NG")
    assert_equal Locale::Tag.parse("yo_NG"), Locale.current[0]

    Locale.current = "fr"
    assert_equal Locale::Tag.parse("fr"), Locale.current[0]

    Locale.set_default("yo_NG")
    Locale.current = "fr"
    assert_equal Locale::Tag.parse("yo_NG"), Locale.default
    assert_equal Locale::Tag.parse("fr"), Locale.current[0]
    Locale.set_default(nil)
  end

  def test_wrong_envs
    omit("JRuby never use default") if jruby?

    ENV["LC_ALL"] = nil
    ENV["LANGUAGE"] = "g"
    Locale.default = "de"
    assert_equal Locale::Tag.parse("de"), Locale.current[0]

    ENV["LC_ALL"] = "f"
    ENV["LANGUAGE"] = nil
    Locale.default = "fr"
    assert_equal Locale::Tag.parse("fr"), Locale.current[0]

    ENV["LC_ALL"] = "j"
    ENV["LANGUAGE"] = nil
    Locale.default = nil
    assert_equal Locale::Tag.parse("en"), Locale.current[0]

  end

  def test_clear
    ENV["LC_ALL"] = "ja_JP.Shift_JIS"
    ENV["LANGUAGE"] = nil

    assert_equal Locale::Tag.parse("ja_JP.Shift_JIS"), Locale.current[0]
    Locale.clear
    ENV["LANGUAGE"] = "zh_CN.UTF-8:ja_JP"
    assert_equal Locale::Tag::Posix.parse("zh_CN.UTF-8"), Locale.current[0]
    assert_equal Locale::Tag::Posix.parse("ja_JP"), Locale.current[1]
    
  end

  class TestCharset < self
    def test_lc_all
      ENV["LC_ALL"] = "ja_JP.eucJP"
      ENV["LC_CTYPE"] = "ko_KR.eucKR" # Ignored.
      ENV["LANG"] = "fr_FR.ISO-8859-1" # Ignored.

      assert_equal("eucJP", Locale.charset)
    end

    def test_lc_ctype
      ENV["LC_ALL"] = nil
      ENV["LC_CTYPE"] = "ko_KR.eucKR"
      ENV["LANG"] = "fr_FR.ISO-8859-1" # Ignored.

      assert_equal("eucKR", Locale.charset)
    end

    def test_lc_messages
      ENV["LC_ALL"] = nil
      ENV["LC_MESSAGES"] = "ko_KR.eucKR" # Ignored.
      ENV["LANG"] = "fr_FR.ISO-8859-1"

      assert_equal("ISO-8859-1", Locale.charset)
    end

    def test_lang
      ENV["LC_ALL"] = nil
      ENV["LC_CTYPE"] = nil
      ENV["LANG"] = "fr_FR.ISO-8859-1"

      assert_equal("ISO-8859-1", Locale.charset)
    end
  end

  private
  def jruby?
    RUBY_PLATFORM == "java"
  end
end

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