require_relative '../../../spec_helper' require 'set' ruby_version_is "3.0" do describe "SortedSet" do it "raises error including message that it has been extracted from the set stdlib" do -> { SortedSet }.should raise_error(RuntimeError) { |e| e.message.should.include?("The `SortedSet` class has been extracted from the `set` library") } end end end ruby_version_is ""..."3.0" do describe "SortedSet" do it "is part of the set stdlib" do SortedSet.superclass.should == Set end end end