corrected tests for conference domains service

app/services/conference_domains_service.rb

@@ -1,6 +1,9 @@
+require 'resolv'
+
 class ConferenceDomainsService
-  def initialize(params)
-    @conference = params[:conference]
+  def initialize(conference, resolver = Resolv::DNS.new)
+    @conference = conference
+    @resolver = resolver
   end
 
   ##
@@ -11,16 +14,7 @@ class ConferenceDomainsService
   # * +true+ -> If the custom domain has a CNAME record for the hosted version
   # * +false+ -> If the custom domain does not have a CNAME record for the hosted version
   def check_custom_domain
-    require 'resolv'
-    unless ENV['OSEM_HOSTNAME'].nil?
-      cname_record = Resolv::DNS.new.getresources(@conference.custom_domain, Resolv::DNS::Resource::IN::CNAME)
-      if cname_record.present?
-        return ENV['OSEM_HOSTNAME'] == cname_record.first.name.to_s
-      else
-        return false
-      end
-    end
-
-    '--feature disabled--'
+    cname_record = @resolver.getresources(@conference.custom_domain, Resolv::DNS::Resource::IN::CNAME)
+    cname_record.present? ? ENV['OSEM_HOSTNAME'] == cname_record.name.to_s : false
   end
 end

app/views/admin/conference_domains/show.haml

@@ -17,14 +17,15 @@
           %td
             = @conference.custom_domain
           %td
-            - ck_domain = ConferenceDomainsService.new(conference: @conference).check_custom_domain
-            - if ck_domain == true
-              %span.glyphicon.glyphicon-ok
-            - elsif ck_domain == false
-              %span.glyphicon.glyphicon-remove
+            - if ENV['OSEM_HOSTNAME'].present?
+              - ck_domain = ConferenceDomainsService.new(@conference).check_custom_domain
+              - if ck_domain
+                %span.glyphicon.glyphicon-ok
+              - else
+                %span.glyphicon.glyphicon-remove
             - else
               %i
-                = ck_domain
+                feature disabled
           %td
             .btn-group
               = link_to 'Edit', admin_conference_conference_domains_edit_path(@conference.short_title),
@@ -67,7 +68,7 @@
           Pick a domain you want to host your conference on from a domain registrar or register it with a domain registrar.
         %li
           Add your own domain name to OSEM
-          = link_to 'here', admin_conference_conference_domains_edit_path(id: @conference.short_title)
+          = link_to 'here', admin_conference_conference_domains_edit_path(@conference.short_title)
         %li
           The last step is adding a CNAME record in your registrar’s DNS Settings.
           Different registrars have different ways of adding a CNAME record.

spec/services/conference_domains_service_spec.rb

@@ -1,28 +1,33 @@
 require 'spec_helper'
 
 describe ConferenceDomainsService do
-  let!(:conference) { create(:conference, custom_domain: 'demo.osem.io') }
-  subject { ConferenceDomainsService.new(conference: conference) }
+  let(:conference) { create(:conference, custom_domain: 'demo.osem.io') }
+  let(:resolver) { double('resolver') }
+  let(:service) { ConferenceDomainsService.new(conference, resolver) }
+
+  describe '#check_custom_domain' do
+    subject { service.check_custom_domain }
+    let(:cname_record) { double(name: cname_domain) }
 
-  describe 'return correct value' do
     before do
       ENV['OSEM_HOSTNAME'] = 'osem-demo.herokuapp.com'
+      allow(resolver).to receive(:getresource).with(conference.custom_domain, Resolv::DNS::Resource::IN::CNAME)
+        .and_return(cname_record)
     end
 
-    it 'returns true if cname record matches the domain name' do
-      expect(subject.check_custom_domain).to eq true
+    context 'when the cname record matches the domain name' do
+      let(:cname_domain) { ENV['OSEM_HOSTNAME'] }
+      it { is_expected.to eq true }
     end
 
-    it 'returns feature disabled if OSEM_HOSTNAME is not present' do
-      ENV['OSEM_HOSTNAME'] = nil
-
-      expect(subject.check_custom_domain).to eq '--feature disabled--'
+    context 'when the cname record does not match the domain name' do
+      let(:cname_domain) { 'random.domain.com' }
+      it { is_expected.to eq false }
     end
 
-    it 'returns false if cname record is not present' do
-      conference.update_attribute(:custom_domain, 'osem-demo.herokuapp.com')
-
-      expect(subject.check_custom_domain).to eq false
+    context 'when there is no cname record present' do
+      let(:cname_record) { nil }
+      it { is_expected.to eq false }
     end
   end
 end