require_relative '../../spec_helper'

describe "Encoding.find" do
  before :all do
    @encodings = Encoding.aliases.to_a.flatten.uniq
  end

  it "returns the corresponding Encoding object if given a valid encoding name" do
    @encodings.each do |enc|
      Encoding.find(enc).should be_an_instance_of(Encoding)
    end
  end

  it "returns the corresponding Encoding object if given a valid alias name" do
    Encoding.aliases.keys.each do |enc_alias|
      Encoding.find(enc_alias).should be_an_instance_of(Encoding)
    end
  end

  it "raises a TypeError if passed a Symbol" do
    -> { Encoding.find(:"utf-8") }.should raise_error(TypeError)
  end

  it "returns the passed Encoding object" do
    Encoding.find(Encoding::UTF_8).should == Encoding::UTF_8
  end

  it "accepts encoding names as Strings" do
    Encoding.list.each do |enc|
      Encoding.find(enc.name).should == enc
    end
  end

  it "accepts any object as encoding name, if it responds to #to_str" do
    obj = Class.new do
      attr_writer :encoding_name
      def to_str; @encoding_name; end
    end.new

    Encoding.list.each do |enc|
      obj.encoding_name = enc.name
      Encoding.find(obj).should == enc
    end
  end

  it "is case insensitive" do
    @encodings.each do |enc|
      Encoding.find(enc.upcase).should == Encoding.find(enc)
    end
  end

  it "raises an ArgumentError if the given encoding does not exist" do
    -> { Encoding.find('dh2dh278d') }.should raise_error(ArgumentError)
  end

  # Not sure how to do a better test, since locale depends on weird platform-specific stuff
  it "supports the 'locale' encoding alias" do
    enc = Encoding.find('locale')
    enc.should_not == nil
  end

  it "returns default external encoding for the 'external' encoding alias" do
    enc = Encoding.find('external')
    enc.should == Encoding.default_external
  end

  it "returns default internal encoding for the 'internal' encoding alias" do
    enc = Encoding.find('internal')
    enc.should == Encoding.default_internal
  end

  platform_is_not :windows do
    it "uses default external encoding for the 'filesystem' encoding alias" do
      enc = Encoding.find('filesystem')
      enc.should == Encoding.default_external
    end
  end

  platform_is :windows do
    it "needs to be reviewed for spec completeness"
  end
end