- # frozen_string_literal: true
-
- require 'rails_helper'
-
- describe EmailMxValidator do
- describe '#validate' do
- let(:user) { double(email: 'foo@example.com', sign_up_ip: '1.2.3.4', errors: double(add: nil)) }
-
- context 'for an e-mail domain that is explicitly allowed' do
- around do |block|
- tmp = Rails.configuration.x.email_domains_whitelist
- Rails.configuration.x.email_domains_whitelist = 'example.com'
- block.call
- Rails.configuration.x.email_domains_whitelist = tmp
- end
-
- it 'does not add errors if there are no DNS records' do
- resolver = double
-
- allow(resolver).to receive(:getresources).with('example.com', Resolv::DNS::Resource::IN::MX).and_return([])
- allow(resolver).to receive(:getresources).with('example.com', Resolv::DNS::Resource::IN::A).and_return([])
- allow(resolver).to receive(:getresources).with('example.com', Resolv::DNS::Resource::IN::AAAA).and_return([])
- allow(resolver).to receive(:timeouts=).and_return(nil)
- allow(Resolv::DNS).to receive(:open).and_yield(resolver)
-
- subject.validate(user)
- expect(user.errors).to_not have_received(:add)
- end
- end
-
- it 'adds an error if there are no DNS records for the e-mail domain' do
- resolver = double
-
- allow(resolver).to receive(:getresources).with('example.com', Resolv::DNS::Resource::IN::MX).and_return([])
- allow(resolver).to receive(:getresources).with('example.com', Resolv::DNS::Resource::IN::A).and_return([])
- allow(resolver).to receive(:getresources).with('example.com', Resolv::DNS::Resource::IN::AAAA).and_return([])
- allow(resolver).to receive(:timeouts=).and_return(nil)
- allow(Resolv::DNS).to receive(:open).and_yield(resolver)
-
- subject.validate(user)
- expect(user.errors).to have_received(:add)
- end
-
- it 'adds an error if a MX record does not lead to an IP' do
- resolver = double
-
- allow(resolver).to receive(:getresources).with('example.com', Resolv::DNS::Resource::IN::MX).and_return([double(exchange: 'mail.example.com')])
- allow(resolver).to receive(:getresources).with('example.com', Resolv::DNS::Resource::IN::A).and_return([])
- allow(resolver).to receive(:getresources).with('example.com', Resolv::DNS::Resource::IN::AAAA).and_return([])
- allow(resolver).to receive(:getresources).with('mail.example.com', Resolv::DNS::Resource::IN::A).and_return([])
- allow(resolver).to receive(:getresources).with('mail.example.com', Resolv::DNS::Resource::IN::AAAA).and_return([])
- allow(resolver).to receive(:timeouts=).and_return(nil)
- allow(Resolv::DNS).to receive(:open).and_yield(resolver)
-
- subject.validate(user)
- expect(user.errors).to have_received(:add)
- end
-
- it 'adds an error if the MX record is blacklisted' do
- EmailDomainBlock.create!(domain: 'mail.example.com')
- resolver = double
-
- allow(resolver).to receive(:getresources).with('example.com', Resolv::DNS::Resource::IN::MX).and_return([double(exchange: 'mail.example.com')])
- allow(resolver).to receive(:getresources).with('example.com', Resolv::DNS::Resource::IN::A).and_return([])
- allow(resolver).to receive(:getresources).with('example.com', Resolv::DNS::Resource::IN::AAAA).and_return([])
- allow(resolver).to receive(:getresources).with('mail.example.com', Resolv::DNS::Resource::IN::A).and_return([double(address: '2.3.4.5')])
- allow(resolver).to receive(:getresources).with('mail.example.com', Resolv::DNS::Resource::IN::AAAA).and_return([double(address: 'fd00::2')])
- allow(resolver).to receive(:timeouts=).and_return(nil)
- allow(Resolv::DNS).to receive(:open).and_yield(resolver)
-
- subject.validate(user)
- expect(user.errors).to have_received(:add)
- end
- end
- end
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