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

describe "Encoding::Converter.new" do
  it "accepts a String for the source encoding" do
    conv = Encoding::Converter.new("us-ascii", "utf-8")
    conv.source_encoding.should == Encoding::US_ASCII
  end

  it "accepts a String for the destination encoding" do
    conv = Encoding::Converter.new("us-ascii", "utf-8")
    conv.destination_encoding.should == Encoding::UTF_8
  end

  it "accepts an Encoding object for the source encoding" do
    conv = Encoding::Converter.new(Encoding::US_ASCII, "utf-8")
    conv.source_encoding.should == Encoding::US_ASCII
  end

  it "accepts an Encoding object for the destination encoding" do
    conv = Encoding::Converter.new("us-ascii", Encoding::UTF_8)
    conv.destination_encoding.should == Encoding::UTF_8
  end

  it "raises an Encoding::ConverterNotFoundError if both encodings are the same" do
    -> do
      Encoding::Converter.new "utf-8", "utf-8"
    end.should raise_error(Encoding::ConverterNotFoundError)
  end

  it "calls #to_str to convert the source encoding argument to an encoding name" do
    enc = mock("us-ascii")
    enc.should_receive(:to_str).and_return("us-ascii")
    conv = Encoding::Converter.new(enc, "utf-8")
    conv.source_encoding.should == Encoding::US_ASCII
  end

  it "calls #to_str to convert the destination encoding argument to an encoding name" do
    enc = mock("utf-8")
    enc.should_receive(:to_str).and_return("utf-8")
    conv = Encoding::Converter.new("us-ascii", enc)
    conv.destination_encoding.should == Encoding::UTF_8
  end

  it "sets replacement from the options Hash" do
    conv = Encoding::Converter.new("us-ascii", "utf-8", replace: "fubar")
    conv.replacement.should == "fubar"
  end

  it "calls #to_hash to convert the options argument to a Hash if not an Integer" do
    opts = mock("encoding converter options")
    opts.should_receive(:to_hash).and_return({ replace: "fubar" })
    conv = Encoding::Converter.new("us-ascii", "utf-8", **opts)
    conv.replacement.should == "fubar"
  end

  it "calls #to_str to convert the replacement object to a String" do
    obj = mock("encoding converter replacement")
    obj.should_receive(:to_str).and_return("fubar")
    conv = Encoding::Converter.new("us-ascii", "utf-8", replace: obj)
    conv.replacement.should == "fubar"
  end

  it "raises a TypeError if #to_str does not return a String" do
    obj = mock("encoding converter replacement")
    obj.should_receive(:to_str).and_return(1)

    -> do
      Encoding::Converter.new("us-ascii", "utf-8", replace: obj)
    end.should raise_error(TypeError)
  end

  it "raises a TypeError if passed true for the replacement object" do
    -> do
      Encoding::Converter.new("us-ascii", "utf-8", replace: true)
    end.should raise_error(TypeError)
  end

  it "raises a TypeError if passed false for the replacement object" do
    -> do
      Encoding::Converter.new("us-ascii", "utf-8", replace: false)
    end.should raise_error(TypeError)
  end

  it "raises a TypeError if passed an Integer for the replacement object" do
    -> do
      Encoding::Converter.new("us-ascii", "utf-8", replace: 1)
    end.should raise_error(TypeError)
  end

  it "accepts an empty String for the replacement object" do
    conv = Encoding::Converter.new("us-ascii", "utf-8", replace: "")
    conv.replacement.should == ""
  end

  describe "when passed nil for the replacement object" do
    describe "when the destination encoding is not UTF-8" do
      it "sets the replacement String to '?'" do
        conv = Encoding::Converter.new("us-ascii", "binary", replace: nil)
        conv.replacement.should == "?"
      end

      it "sets the replacement String encoding to US-ASCII" do
        conv = Encoding::Converter.new("us-ascii", "binary", replace: nil)
        conv.replacement.encoding.should == Encoding::US_ASCII
      end

      it "sets the replacement String to '\\uFFFD'" do
        conv = Encoding::Converter.new("us-ascii", "utf-8", replace: nil)
        conv.replacement.should == "\u{fffd}".force_encoding("utf-8")
      end

      it "sets the replacement String encoding to UTF-8" do
        conv = Encoding::Converter.new("us-ascii", "utf-8", replace: nil)
        conv.replacement.encoding.should == Encoding::UTF_8
      end
    end
  end
end
