require File.expand_path('../../../spec_helper', __FILE__) require 'date' describe "Date#prev_day" do it "returns previous day" do d = Date.new(2000, 7, 2).prev_day d.should == Date.new(2000, 7, 1) end it "returns three days ago across months" do d = Date.new(2000, 7, 2).prev_day(3) d.should == Date.new(2000, 6, 29) end end