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# frozen_string_literal: true
module DnsHelpers
def block_dns!
stub_all_dns!
stub_invalid_dns!
permit_local_dns!
end
def permit_dns!
allow(Addrinfo).to receive(:getaddrinfo).and_call_original
end
def stub_all_dns!
allow(Addrinfo).to receive(:getaddrinfo).with(anything, anything, nil, :STREAM).and_return([])
allow(Addrinfo).to receive(:getaddrinfo).with(anything, anything, nil, :STREAM, anything, anything).and_return([])
end
def stub_invalid_dns!
allow(Addrinfo).to receive(:getaddrinfo).with(/\Afoobar\.\w|(\d{1,3}\.){4,}\d{1,3}\z/i, anything, nil, :STREAM) do
raise SocketError, "getaddrinfo: Name or service not known"
end
end
def permit_local_dns!
local_addresses = %r{
\A
::1? | # IPV6
(127|10)\.0\.0\.\d{1,3} | # 127.0.0.x or 10.0.0.x local network
(192\.168|172\.16)\.\d{1,3}\.\d{1,3} | # 192.168.x.x or 172.16.x.x local network
0\.0\.0\.0 | # loopback
localhost
\z
}xi
allow(Addrinfo).to receive(:getaddrinfo).with(local_addresses, anything, nil, :STREAM).and_call_original
allow(Addrinfo).to receive(:getaddrinfo).with(local_addresses, anything, nil, :STREAM, anything, anything, any_args).and_call_original
end
end
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