# -*- encoding: binary -*-
require_relative '../../../spec_helper'

describe "Encoding::Converter#convert" do
  it "returns a String" do
    ec = Encoding::Converter.new('ascii', 'utf-8')
    ec.convert('glark').should be_an_instance_of(String)
  end

  it "sets the encoding of the result to the target encoding" do
    ec = Encoding::Converter.new('ascii', 'utf-8')
    str = 'glark'.force_encoding('ascii')
    ec.convert(str).encoding.should == Encoding::UTF_8
  end

  it "transcodes the given String to the target encoding" do
    ec = Encoding::Converter.new("utf-8", "euc-jp")
    ec.convert("\u3042".force_encoding('UTF-8')).should == \
      "\xA4\xA2".force_encoding('EUC-JP')
  end

  it "allows Strings of different encodings to the source encoding" do
    ec = Encoding::Converter.new('ascii', 'utf-8')
    str = 'glark'.force_encoding('SJIS')
    ec.convert(str).encoding.should == Encoding::UTF_8
  end

  it "reuses the given encoding pair if called multiple times" do
    ec = Encoding::Converter.new('ascii', 'SJIS')
    ec.convert('a'.force_encoding('ASCII')).should == 'a'.force_encoding('SJIS')
    ec.convert('b'.force_encoding('ASCII')).should == 'b'.force_encoding('SJIS')
  end

  it "raises UndefinedConversionError if the String contains characters invalid for the target encoding" do
    ec = Encoding::Converter.new('UTF-8', Encoding.find('macCyrillic'))
    -> { ec.convert("\u{6543}".force_encoding('UTF-8')) }.should \
      raise_error(Encoding::UndefinedConversionError)
  end

  it "raises an ArgumentError if called on a finished stream" do
    ec = Encoding::Converter.new('UTF-8', Encoding.find('macCyrillic'))
    ec.finish
    -> { ec.convert("\u{65}") }.should raise_error(ArgumentError)
  end
end