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

ruby_version_is ""..."3.0" do
  require 'set'

  describe "SortedSet#subtract" do
    before :each do
      @set = SortedSet["a", "b", "c"]
    end

    it "deletes any elements contained in other and returns self" do
      @set.subtract(SortedSet["b", "c"]).should == @set
      @set.should == SortedSet["a"]
    end

    it "accepts any enumerable as other" do
      @set.subtract(["c"]).should == SortedSet["a", "b"]
    end
  end
end