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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
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