File: default_external_spec.rb

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require_relative '../../spec_helper'

describe "Encoding.default_external" do
  before :each do
    @original_encoding = Encoding.default_external
  end

  after :each do
    Encoding.default_external = @original_encoding
  end

  it "returns an Encoding object" do
    Encoding.default_external.should be_an_instance_of(Encoding)
  end

  it "returns the default external encoding" do
    Encoding.default_external = Encoding::SHIFT_JIS
    Encoding.default_external.should == Encoding::SHIFT_JIS
  end

  ruby_version_is "3.0" do
    platform_is :windows do
      it 'is UTF-8 by default on Windows' do
        Encoding.default_external.should == Encoding::UTF_8
      end
    end
  end
end

describe "Encoding.default_external=" do
  before :each do
    @original_encoding = Encoding.default_external
  end

  after :each do
    Encoding.default_external = @original_encoding
  end

  it "sets the default external encoding" do
    Encoding.default_external = Encoding::SHIFT_JIS
    Encoding.default_external.should == Encoding::SHIFT_JIS
    Encoding.find('external').should == Encoding::SHIFT_JIS
  end

  platform_is_not :windows do
    it "also sets the filesystem encoding" do
      Encoding.default_external = Encoding::SHIFT_JIS
      Encoding.find('filesystem').should == Encoding::SHIFT_JIS
    end
  end

  it "can accept a name of an encoding as a String" do
    Encoding.default_external = 'Shift_JIS'
    Encoding.default_external.should == Encoding::SHIFT_JIS
  end

  it "calls #to_s on arguments that are neither Strings nor Encodings" do
    string = mock('string')
    string.should_receive(:to_str).at_least(1).and_return('US-ASCII')
    Encoding.default_external = string
    Encoding.default_external.should == Encoding::ASCII
  end

  it "raises a TypeError unless the argument is an Encoding or convertible to a String" do
    -> { Encoding.default_external = [] }.should raise_error(TypeError)
  end

  it "raises an ArgumentError if the argument is nil" do
    -> { Encoding.default_external = nil }.should raise_error(ArgumentError)
  end
end