Check expiration date and cover range with Redis (RedisCacheStore) in Rails

redis_key_expiration.rb

p Rails.cache.delete("key2")
p Rails.cache.write("key2", "value2", expires_in: 2.hours)
p expiration_time = Rails.cache.redis.call("EXPIRETIME", "key2")

raise "No expiration time" if expiration_time == -1
raise "Key not found" if expiration_time == -2

p expirate_date_time = Time.at(expiration_time)

# Propably better way to check if expiration time is correct
p ((2.hours.from_now.utc - 2.minute)..(2.hours.from_now.utc + 2.minute)).cover?(expirate_date_time)

=begin
1
"OK"
1682601610
"2023-04-27T15:20:10.000+02:00"
true
=end