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Ruby DNS Check
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| require 'resolv' | |
| class DnsCheck | |
| attr_reader :host | |
| def initialize(host) | |
| @host = host | |
| end | |
| def a | |
| @a ||= Resolv::DNS.new.getresources(host, Resolv::DNS::Resource::IN::A) | |
| end | |
| def a? | |
| a.any? | |
| end | |
| def mx | |
| @mx ||= Resolv::DNS.new.getresources(host, Resolv::DNS::Resource::IN::MX) | |
| end | |
| def mx? | |
| mx.any? | |
| end | |
| def ns | |
| @ns ||= Resolv::DNS.new.getresources(host, Resolv::DNS::Resource::IN::NS) | |
| end | |
| def ns? | |
| ns.any? | |
| end | |
| end |
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| require 'testrocket' | |
| require './dns_check' | |
| !-> { 'It returns true / record sets for legit domains' } | |
| +-> { DnsCheck.new('github.com').a? } | |
| +-> { DnsCheck.new('github.com').a.any? } | |
| +-> { DnsCheck.new('github.com').mx? } | |
| +-> { DnsCheck.new('github.com').mx.any? } | |
| +-> { DnsCheck.new('github.com').ns? } | |
| +-> { DnsCheck.new('github.com').ns.any? } | |
| !-> { 'It returns false / empty arrays for invalid domains' } | |
| --> { DnsCheck.new('boomthisisinvalid.com').a? } | |
| +-> { DnsCheck.new('boomthisisinvalid.com').a.empty? } | |
| --> { DnsCheck.new('boomthisisinvalid.com').mx? } | |
| +-> { DnsCheck.new('boomthisisinvalid.com').mx.empty? } | |
| --> { DnsCheck.new('boomthisisinvalid.com').ns? } | |
| +-> { DnsCheck.new('boomthisisinvalid.com').ns.empty? } | |
| --> { DnsCheck.new('not even a domain 💩').a? } |
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