File: subtract_spec.rb

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require File.dirname(__FILE__) + '/../../spec_helper'
require 'set'

describe "Set#subtract" do
  before :each do
    @set = Set[:a, :b, :c]
  end
  
  it "deletes any elements contained in other and returns self" do
    @set.subtract(Set[:b, :c]).should == @set
    @set.should == Set[:a]
  end
  
  it "accepts any enumerable as other" do
    @set.subtract([:c]).should == Set[:a, :b]
  end
end