Use dynamic fake data in the spec

spec/serializers/conference_serializer_spec.rb

@@ -12,7 +12,7 @@ describe ConferenceSerializer, type: :serializer do
     {
       conference: {
         short_title: 'goto',
-        title: 'The dog and pony show',
+        title: conference.title,
         description: 'Lorem ipsum dolor sit',
         start_date: '2014-03-04',
         end_date: '2014-03-10',
@@ -61,7 +61,7 @@ describe ConferenceSerializer, type: :serializer do
     before do
       venue = create(:venue, conference: conference)
       _room = create(:room, venue: venue)
-      _track = create(:track, program: conference.program)
+      track = create(:track, program: conference.program)
 
       room_hash = {
         rooms: [{
@@ -74,8 +74,8 @@ describe ConferenceSerializer, type: :serializer do
       track_hash = {
         tracks: [{
             id: 1,
-            name: 'Example Track',
-            description: 'Lorem Ipsum dolsum'
+            name: track.name,
+            description: track.description
           }
         ]
       }

spec/serializers/room_serializer_spec.rb

@@ -7,7 +7,7 @@ describe RoomSerializer, type: :serializer do
     expected_json = {
       room: {
         guid: room.guid,
-        name: 'Example Room',
+        name: room.name,
         description: ''
       }
     }.to_json

spec/serializers/track_serializer_spec.rb

@@ -8,8 +8,8 @@ describe TrackSerializer, type: :serializer do
     expected_json = {
       track: {
         guid: track.guid,
-        name: 'Example Track',
-        color: '#ffffff'
+        name: track.name, 
+        color: track.color
       }
     }.to_json