def assert v, op, q
  raise "assert #{v} #{op} #{q}" unless v.send(op, q)
  puts "ok #{v} #{op} #{q}" if $DEBUG
end
ENV['TZ'] = 'JST-9'

j = JTime.new
t = Time.new
assert(-1..0, :===, j - t)
begin
  tj = t - j
rescue TypeError
  tj = 0
end
assert(0..1, :===, tj)

z = JTime.local(2018, 10, 2, 12, 34, 56)
assert(JTime, :==, (z + 1).class)
assert(JTime, :==, (z - 1).class)
assert(JTime, :==, z.succ.class)
assert('Tue Oct  2 03:34:56 2018', :==, z.getgm.strftime('%c'))
assert(JTime, :==, z.getgm.class)
assert(JTime, :==, z.getutc.class)
assert(JTime, :==, z.getlocal.class)
assert(JTime, :==, z.getlocal(0).class)

assert(JTime, :==, JTime.local(1989, 1, 1).gmtime.class)
assert(JTime, :==, JTime.local(1989, 1, 1).utc.class)
assert('1970-01-01 09:00:03 +0900', :==, JTime.at(Math::PI).round.to_s)
assert(JTime, :==, JTime.at(Math::PI).round.class)

class JTime2 < JTime
end
assert(JTime2, :==, (JTime2.new + 1).class)
assert(JTime2, :==, (JTime2.new.gmtime).class)
assert(JTime2, :==, (JTime2.new.getlocal).class)
assert(JTime2, :==, (JTime2.new.round).class)


assert(JTime.local(1989, 1, 1).era_name, :==, JTime::SHOWA)
assert(JTime.local(1989, 1, 7).era_name, :==, JTime::SHOWA)
assert(JTime.local(1989, 1, 7, 23, 59, 59).era_name, :==, JTime::SHOWA)
assert(JTime.local(1989, 1, 7, 23, 59, 60).era_name, :==, JTime::HEISEI)
assert(JTime.local(1989, 1, 8, 0, 0, 1).era_name, :==, JTime::HEISEI)
assert(JTime.local(2018, 10, 2).era_name, :==, JTime::HEISEI)
assert(JTime.local(2018, 10, 2).era_name, :==, JTime::HEISEI)
assert(JTime.local(2018, 10, 2).strftime('%Jf'), :==, '平成30年10月02日')
assert(JTime.local(2019, 4, 29).strftime('%Jf'), :==, '平成31年04月29日')
assert(JTime.local(2019, 4, 30).strftime('%Jf'), :==, '平成31年04月30日')
assert(JTime.local(2019, 5,  1).strftime('%Jf'), :==, JTime::ERA2019 + '元年05月01日')
assert(JTime.local(2019, 12,31).strftime('%Jf'), :==, JTime::ERA2019 + '元年12月31日')
assert(JTime.local(2020, 1,  1).strftime('%Jf'), :==, JTime::ERA2019 + '2年01月01日')