require File.expand_path('../../../spec_helper', __FILE__) require 'pathname' describe "Pathname#sub" do it "replaces the pattern with rest" do Pathname.new('/usr/local/bin/').sub(/local/, 'fish').to_s.should == '/usr/fish/bin/' end it "returns a new object" do p = Pathname.new('/usr/local/bin/') p.sub(/local/, 'fish').should_not == p end end