Script to output behaviours of Time, Date and DateTime across Ruby versions

behaviour.rb

require 'date'
require 'time'

ENV['TZ'] = 'America/New_York'
time = Time.new(2017, 1, 1, 0, 0, 0, "+02:00").freeze
date = Date.new(2017, 1, 1).freeze
datetime = DateTime.new(2017, 1, 1, 0, 0, 0, Rational(2, 24)).freeze

# Time
puts "Time#to_time              | #{RUBY_VERSION} "
puts "--------------------------|-------"
puts "Maintains UTC offset      | %-5s " % (time.utc_offset == time.to_time.utc_offset).to_s[0]
puts "Converts to +00:00        | %-5s " % (time.to_time.utc_offset.zero?).to_s[0]
puts "Converts to TZ            | %-5s " % (time.to_time.utc_offset == -18000).to_s[0]
puts "Returns self              | %-5s " % (time.object_id == time.to_time.object_id).to_s[0]
puts "Returns frozen            | %-5s \n\n" % (time.to_time.frozen?).to_s[0]

puts "Time#to_datetime          | #{RUBY_VERSION} "
puts "--------------------------|-------"
puts "Maintains UTC offset      | %-5s " % (Rational(time.utc_offset, 86400) == time.to_datetime.offset).to_s[0]
puts "Converts to +00:00        | %-5s " % (time.to_datetime.offset.zero?).to_s[0]
puts "Converts to TZ            | %-5s " % (time.to_datetime.offset == Rational(-5,24)).to_s[0]
puts "Returns self              | %-5s " % (time.object_id == time.to_datetime.object_id).to_s[0]
puts "Returns frozen            | %-5s \n\n" % (time.to_datetime.frozen?).to_s[0]

puts "Time#to_date              | #{RUBY_VERSION} "
puts "--------------------------|-------"
puts "Returns self              | %-5s " % (time.object_id == time.to_date.object_id).to_s[0]
puts "Returns frozen            | %-5s \n\n" % (time.to_date.frozen?).to_s[0]

# Date
puts "Date#to_time              | #{RUBY_VERSION} "
puts "--------------------------|-------"
puts "Maintains UTC offset      | %-5s " % ("N/A")
puts "Converts to +00:00        | %-5s " % (date.to_time.utc_offset.zero?).to_s[0]
puts "Converts to TZ            | %-5s " % (date.to_time.utc_offset == -18000).to_s[0]
puts "Returns self              | %-5s " % (date.object_id == date.to_time.object_id).to_s[0]
puts "Returns frozen            | %-5s \n\n" % (date.to_time.frozen?).to_s[0]

puts "Date#to_datetime          | #{RUBY_VERSION} "
puts "--------------------------|-------"
puts "Maintains UTC offset      | %-5s " % ("N/A")
puts "Converts to +00:00        | %-5s " % (date.to_datetime.offset.zero?).to_s[0]
puts "Converts to TZ            | %-5s " % (date.to_datetime.offset == Rational(-5,24)).to_s[0]
puts "Returns self              | %-5s " % (date.object_id == date.to_datetime.object_id).to_s[0]
puts "Returns frozen            | %-5s \n\n" % (date.to_datetime.frozen?).to_s[0]

puts "Date#to_date              | #{RUBY_VERSION} "
puts "--------------------------|-------"
puts "Returns self              | %-5s " % (date.object_id == date.to_date.object_id).to_s[0]
puts "Returns frozen            | %-5s \n\n" % (date.to_date.frozen?).to_s[0]

# DateTime
puts "DateTime#to_time          | #{RUBY_VERSION} "
puts "--------------------------|-------"
puts "Maintains UTC offset      | %-5s " % (datetime.offset * 86400 == datetime.to_time.utc_offset).to_s[0]
puts "Converts to +00:00        | %-5s " % (datetime.to_time.utc_offset.zero?).to_s[0]
puts "Converts to TZ            | %-5s " % (datetime.to_time.utc_offset == -18000).to_s[0]
puts "Returns self              | %-5s " % (datetime.object_id == datetime.to_time.object_id).to_s[0]
puts "Returns frozen            | %-5s \n\n" % (datetime.to_time.frozen?).to_s[0]

puts "DateTime#to_datetime      | #{RUBY_VERSION} "
puts "--------------------------|-------"
puts "Maintains UTC offset      | %-5s " % (datetime.offset == datetime.to_datetime.offset).to_s[0]
puts "Converts to +00:00        | %-5s " % (datetime.to_datetime.offset.zero?).to_s[0]
puts "Converts to TZ            | %-5s " % (datetime.to_datetime.offset == Rational(-5,24)).to_s[0]
puts "Returns self              | %-5s " % (datetime.object_id == datetime.to_datetime.object_id).to_s[0]
puts "Returns frozen            | %-5s \n\n" % (datetime.to_datetime.frozen?).to_s[0]

puts "DateTime#to_date          | #{RUBY_VERSION} "
puts "--------------------------|-------"
puts "Returns self              | %-5s " % (datetime.object_id == datetime.to_date.object_id).to_s[0]
puts "Returns frozen            | %-5s \n\n" % (datetime.to_date.frozen?).to_s[0]