require File.expand_path('../../../../spec_helper', __FILE__)

with_feature :encoding do
  describe "Encoding::Converter.asciicompat_encoding" do
    it "accepts an encoding name as a String argument" do
      lambda { Encoding::Converter.asciicompat_encoding('UTF-8') }.
        should_not raise_error
    end

    it "coerces non-String/Encoding objects with #to_str" do
      str = mock('string')
      str.should_receive(:to_str).at_least(1).times.and_return('string')
      Encoding::Converter.asciicompat_encoding(str)
    end

    it "accepts an Encoding object as an argument" do
      Encoding::Converter.
        asciicompat_encoding(Encoding.find("ISO-2022-JP")).
        should == Encoding::Converter.asciicompat_encoding("ISO-2022-JP")
    end

    it "returns a corresponding ASCII compatible encoding for ASCII-incompatible encodings" do
      Encoding::Converter.asciicompat_encoding('UTF-16BE').should == Encoding::UTF_8
      Encoding::Converter.asciicompat_encoding("ISO-2022-JP").should == Encoding.find("stateless-ISO-2022-JP")
    end

    it "returns nil when the given encoding is ASCII compatible" do
      Encoding::Converter.asciicompat_encoding('ASCII').should be_nil
      Encoding::Converter.asciicompat_encoding('UTF-8').should be_nil
    end

    it "handles encoding names who resolve to nil encodings" do
      internal = Encoding.default_internal
      Encoding.default_internal = nil
      Encoding::Converter.asciicompat_encoding('internal').should be_nil
      Encoding.default_internal = internal
    end
  end
end