require_relative '../../../spec_helper'

describe "Encoding::Converter#replacement" do
  it "returns '?' in US-ASCII when the destination encoding is not UTF-8" do
    ec = Encoding::Converter.new("utf-8", "us-ascii")
    ec.replacement.should == "?"
    ec.replacement.encoding.should == Encoding::US_ASCII

    ec = Encoding::Converter.new("utf-8", "sjis")
    ec.replacement.should == "?"
    ec.replacement.encoding.should == Encoding::US_ASCII
  end

  it "returns \\uFFFD when the destination encoding is UTF-8" do
    ec = Encoding::Converter.new("us-ascii", "utf-8")
    ec.replacement.should == "\u{fffd}".force_encoding('utf-8')
    ec.replacement.encoding.should == Encoding::UTF_8
  end
end

describe "Encoding::Converter#replacement=" do
  it "accepts a String argument" do
    ec = Encoding::Converter.new("utf-8", "us-ascii")
    ec.replacement = "!"
    ec.replacement.should == "!"
  end

  it "accepts a String argument of arbitrary length" do
    ec = Encoding::Converter.new("utf-8", "us-ascii")
    ec.replacement = "?!?" * 9999
    ec.replacement.should == "?!?" * 9999
  end

  it "raises a TypeError if assigned a non-String argument" do
    ec = Encoding::Converter.new("utf-8", "us-ascii")
    -> { ec.replacement = nil }.should raise_error(TypeError)
  end

  it "sets #replacement" do
    ec = Encoding::Converter.new("us-ascii", "utf-8")
    ec.replacement.should == "\u{fffd}".force_encoding('utf-8')
    ec.replacement = '?'.encode('utf-8')
    ec.replacement.should == '?'.force_encoding('utf-8')
  end

  it "raises an UndefinedConversionError is the argument cannot be converted into the destination encoding" do
    ec = Encoding::Converter.new("sjis", "ascii")
    utf8_q = "\u{986}".force_encoding('utf-8')
    ec.primitive_convert(utf8_q.dup, "").should == :undefined_conversion
    -> { ec.replacement = utf8_q }.should \
      raise_error(Encoding::UndefinedConversionError)
  end

  it "does not change the replacement character if the argument cannot be converted into the destination encoding" do
    ec = Encoding::Converter.new("sjis", "ascii")
    utf8_q = "\u{986}".force_encoding('utf-8')
    ec.primitive_convert(utf8_q.dup, "").should == :undefined_conversion
    -> { ec.replacement = utf8_q }.should \
      raise_error(Encoding::UndefinedConversionError)
    ec.replacement.should == "?".force_encoding('us-ascii')
  end

  it "uses the replacement character" do
    ec = Encoding::Converter.new("utf-8", "us-ascii", :invalid => :replace, :undef => :replace)
    ec.replacement = "!"
    dest = ""
    status = ec.primitive_convert "中文123", dest

    status.should == :finished
    dest.should == "!!123"
  end
end
