require File.expand_path('../../../spec_helper', __FILE__) require 'set' describe "Set#superset?" do before :each do @set = Set[1, 2, 3, 4] end it "returns true if passed a Set that equals self or self is a proper superset of" do @set.superset?(@set).should be_true Set[].superset?(Set[]).should be_true @set.superset?(Set[]).should be_true Set[1, 2, 3].superset?(Set[]).should be_true Set["a", :b, ?c].superset?(Set[]).should be_true @set.superset?(Set[1, 2, 3]).should be_true @set.superset?(Set[1, 3]).should be_true @set.superset?(Set[1, 2]).should be_true @set.superset?(Set[1]).should be_true @set.superset?(Set[5]).should be_false @set.superset?(Set[1, 5]).should be_false @set.superset?(Set[nil]).should be_false @set.superset?(Set["test"]).should be_false end it "raises an ArgumentError when passed a non-Set" do lambda { Set[].superset?([]) }.should raise_error(ArgumentError) lambda { Set[].superset?(1) }.should raise_error(ArgumentError) lambda { Set[].superset?("test") }.should raise_error(ArgumentError) lambda { Set[].superset?(Object.new) }.should raise_error(ArgumentError) end end