Fix model specs to work with MySQL

spec/models/campaign_spec.rb

@@ -36,7 +36,7 @@ describe Campaign do
       campaign.conference = build(:conference)
 
       create(:visit, utm_source: 'google+', utm_medium: 'advertisement',
-                     utm_term: 'opensource', utm_content: 'content', utm_campaign: '20percent', started_at: Time.now)
+                     utm_term: 'opensource', utm_content: 'content', utm_campaign: '20percent', started_at: Time.now + 1.hour)
       expect(campaign.visits_count).to eq(1)
     end
 

spec/models/conference_spec.rb

@@ -906,7 +906,7 @@ describe Conference do
     let!(:organizer) { create(:user, role_ids: [organizer_role.id]) }
 
     it 'self#event_distribution calculates correct values with user' do
-      create(:user, last_sign_in_at: Date.today - 3.months) # active
+      create(:user, last_sign_in_at: Date.today - 3.months + 1.day) # active
       create(:user, confirmed_at: nil) # unconfirmed
       create(:user, last_sign_in_at: Date.today - 1.year - 1.day) # dead
       result = {}
@@ -918,7 +918,7 @@ describe Conference do
     end
 
     it 'self#event_distribution calculates correct with only active user' do
-      create(:user, last_sign_in_at: Date.today - 3.months) # active
+      create(:user, last_sign_in_at: Date.today - 3.months + 1.day) # active
       result = {}
       result['Active'] = { 'color' => 'green', 'value' => 1 }
 

spec/models/sponsorship_level_spec.rb

@@ -29,13 +29,13 @@ describe SponsorshipLevel do
 
     it 'is positions sponsorship_levels in order' do
       expect(SponsorshipLevel.where(conference_id: conference.id).order(:position).map(&:id))
-        .to eq [2, 1, 3]
+        .to eq [@second_sponsorship_level.id, @first_sponsorship_level.id, @third_sponsorship_level.id]
     end
 
     it 'maintains order after deleting one element' do
       @first_sponsorship_level.destroy
       expect(SponsorshipLevel.where(conference_id: conference.id).order(:position).map(&:id))
-        .to eq [2, 3]
+        .to eq [@second_sponsorship_level.id, @third_sponsorship_level.id]
     end
   end
 end