1require_relative '../../../spec_helper'
2require 'set'
3
4describe "SortedSet#subtract" do
5  before :each do
6    @set = SortedSet["a", "b", "c"]
7  end
8
9  it "deletes any elements contained in other and returns self" do
10    @set.subtract(SortedSet["b", "c"]).should == @set
11    @set.should == SortedSet["a"]
12  end
13
14  it "accepts any enumerable as other" do
15    @set.subtract(["c"]).should == SortedSet["a", "b"]
16  end
17end
18