require_relative '../../spec_helper' describe "Symbol#<=> with Symbol" do it "compares individual characters based on their ascii value" do ascii_order = Array.new(256) { |x| x.chr.to_sym } sort_order = ascii_order.sort sort_order.should == ascii_order end it "returns -1 when self is less than other" do (:this <=> :those).should == -1 end it "returns 0 when self is equal to other" do (:yep <=> :yep).should == 0 end it "returns 1 when self is greater than other" do (:yoddle <=> :griddle).should == 1 end it "considers symbol that comes lexicographically first to be less if the symbols have same size" do (:aba <=> :abc).should == -1 (:abc <=> :aba).should == 1 end it "doesn't consider shorter string to be less if longer string starts with shorter one" do (:abc <=> :abcd).should == -1 (:abcd <=> :abc).should == 1 end it "compares shorter string with corresponding number of first chars of longer string" do (:abx <=> :abcd).should == 1 (:abcd <=> :abx).should == -1 end end describe "Symbol#<=>" do it "returns nil if other is a String" do (:abc <=> "abc").should be_nil end it "returns nil if other is an Integer" do (:abc <=> 1).should be_nil end it "returns nil if other is an object" do obj = mock("string <=>") (:abc <=> obj).should be_nil end end