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118 lines
4 KiB
Ruby
118 lines
4 KiB
Ruby
# frozen_string_literal: true
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require 'rails_helper'
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RSpec.describe EmailMxValidator do
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describe '#validate' do
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let(:user) { instance_double(User, email: 'foo@example.com', sign_up_ip: '1.2.3.4', errors: instance_double(ActiveModel::Errors, add: nil)) }
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let(:resolv_dns_double) { instance_double(Resolv::DNS) }
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context 'with an e-mail domain that is explicitly allowed' do
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around do |block|
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tmp = Rails.configuration.x.email_domains_allowlist
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Rails.configuration.x.email_domains_allowlist = 'example.com'
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block.call
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Rails.configuration.x.email_domains_allowlist = tmp
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end
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it 'does not add errors if there are no DNS records' do
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configure_resolver('example.com')
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subject.validate(user)
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expect(user.errors).to_not have_received(:add)
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end
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end
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it 'adds no error if there are DNS records for the e-mail domain' do
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configure_resolver('example.com', a: resolv_double_a('192.0.2.42'))
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subject.validate(user)
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expect(user.errors).to_not have_received(:add)
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end
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it 'adds an error if the TagManager fails to normalize domain' do
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double = instance_double(TagManager)
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allow(TagManager).to receive(:instance).and_return(double)
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allow(double).to receive(:normalize_domain).with('example.com').and_raise(Addressable::URI::InvalidURIError)
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user = instance_double(User, email: 'foo@example.com', errors: instance_double(ActiveModel::Errors, add: nil))
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subject.validate(user)
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expect(user.errors).to have_received(:add)
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end
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it 'adds an error if the domain email portion is blank' do
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user = instance_double(User, email: 'foo@', errors: instance_double(ActiveModel::Errors, add: nil))
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subject.validate(user)
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expect(user.errors).to have_received(:add)
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end
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it 'adds an error if the email domain name contains empty labels' do
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configure_resolver('example..com', a: resolv_double_a('192.0.2.42'))
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user = instance_double(User, email: 'foo@example..com', sign_up_ip: '1.2.3.4', errors: instance_double(ActiveModel::Errors, add: nil))
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subject.validate(user)
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expect(user.errors).to have_received(:add)
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end
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it 'adds an error if there are no DNS records for the e-mail domain' do
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configure_resolver('example.com')
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subject.validate(user)
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expect(user.errors).to have_received(:add)
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end
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it 'adds an error if a MX record does not lead to an IP' do
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configure_resolver('example.com', mx: resolv_double_mx('mail.example.com'))
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configure_resolver('mail.example.com')
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subject.validate(user)
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expect(user.errors).to have_received(:add)
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end
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it 'adds an error if the MX record has an email domain block' do
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EmailDomainBlock.create!(domain: 'mail.example.com')
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configure_resolver(
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'example.com',
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mx: resolv_double_mx('mail.example.com')
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)
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configure_resolver(
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'mail.example.com',
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a: instance_double(Resolv::DNS::Resource::IN::A, address: '2.3.4.5'),
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aaaa: instance_double(Resolv::DNS::Resource::IN::AAAA, address: 'fd00::2')
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)
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subject.validate(user)
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expect(user.errors).to have_received(:add)
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end
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end
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def configure_resolver(domain, options = {})
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allow(resolv_dns_double)
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.to receive(:getresources)
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.with(domain, Resolv::DNS::Resource::IN::MX)
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.and_return(Array(options[:mx]))
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allow(resolv_dns_double)
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.to receive(:getresources)
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.with(domain, Resolv::DNS::Resource::IN::A)
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.and_return(Array(options[:a]))
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allow(resolv_dns_double)
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.to receive(:getresources)
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.with(domain, Resolv::DNS::Resource::IN::AAAA)
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.and_return(Array(options[:aaaa]))
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allow(resolv_dns_double)
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.to receive(:timeouts=)
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.and_return(nil)
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allow(Resolv::DNS)
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.to receive(:open)
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.and_yield(resolv_dns_double)
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end
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def resolv_double_mx(domain)
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instance_double(Resolv::DNS::Resource::MX, exchange: domain)
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end
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def resolv_double_a(domain)
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Resolv::DNS::Resource::IN::A.new(domain)
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end
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end
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