require_relative '../../spec_helper' require_relative 'fixtures/classes' describe "Comparable#<" do it "calls #<=> on self with other and returns true if #<=> returns any Integer less than 0" do a = ComparableSpecs::Weird.new(0) b = ComparableSpecs::Weird.new(20) a.should_receive(:<=>).any_number_of_times.and_return(-1) (a < b).should == true a.should_receive(:<=>).any_number_of_times.and_return(-0.1) (a < b).should == true a.should_receive(:<=>).any_number_of_times.and_return(-10000000) (a < b).should == true end it "returns false if calling #<=> on self returns 0 or any Integer greater than 0" do a = ComparableSpecs::Weird.new(0) b = ComparableSpecs::Weird.new(10) a.should_receive(:<=>).any_number_of_times.and_return(0) (a < b).should == false a.should_receive(:<=>).any_number_of_times.and_return(0.0) (a < b).should == false a.should_receive(:<=>).any_number_of_times.and_return(1.0) (a < b).should == false a.should_receive(:<=>).any_number_of_times.and_return(10000000) (a < b).should == false end it "raises an ArgumentError if calling #<=> on self returns nil" do a = ComparableSpecs::Weird.new(0) b = ComparableSpecs::Weird.new(20) a.should_receive(:<=>).any_number_of_times.and_return(nil) -> { (a < b) }.should raise_error(ArgumentError) end end