time.rb

require "active_support/core_ext"

def bookable? booked_day, now
        now <= cancellable_until(booked_day)
end

def cancellable_until booked_day
        booked_day + 2.days + 12.hours
end


describe "bookable?" do
        it "books before in time" do
                booked_day = Time.new(2015, 04, 10)
                now = Time.new(2015, 04, 12, 11, 59, 00)

                expect(bookable?(booked_day, now)).to be true
        end

        it "books on time" do
                booked_day = Time.new(2015, 04, 10)
                now = Time.new(2015, 04, 12, 12, 00, 00)

                expect(bookable?(booked_day, now)).to be true
        end

        it "doesn't books after time" do
                booked_day = Time.new(2015, 04, 10)
                now = Time.new(2015, 04, 12, 12, 01, 00)

                expect(bookable?(booked_day, now)).to be false
        end
end