Fix slack service speck.

spec/models/slack_service_spec.rb

@@ -26,9 +26,7 @@ describe SlackService do
         subject.active = true
       end
 
-      it { should validate_presence_of :room }
-      it { should validate_presence_of :subdomain }
-      it { should validate_presence_of :token }
+      it { should validate_presence_of :webhook }
     end
   end
 
@@ -37,20 +35,17 @@ describe SlackService do
     let(:user) { create(:user) }
     let(:project) { create(:project) }
     let(:sample_data) { GitPushService.new.sample_data(project, user) }
-    let(:subdomain) { 'gitlab' }
-    let(:token) { 'verySecret' }
+    let(:webhook) { 'https://gitlabhq.slack.com/services/hooks?token=cdIj4r4LfXUOySDUjp0tk3OI' }
     let(:api_url) {
-      "https://#{subdomain}.slack.com/services/hooks/incoming-webhook?token=#{token}"
+      'https://gitlabhq.slack.com/services/hooks/incoming-webhook?token=cdIj4r4LfXUOySDUjp0tk3OI'
     }
 
     before do
       slack.stub(
         project: project,
         project_id: project.id,
-        room: '#gitlab',
         service_hook: true,
-        subdomain: subdomain,
-        token: token
+        webhook: webhook
       )
 
       WebMock.stub_request(:post, api_url)