feat: sla 1 - refactor sla_policies model and add applied_sla model (#8602)

* feat: add models

* chore: refactor sla column names

* chore: remove foreign keys

* chore: fix spec

* chore: refactor models

spec/enterprise/models/applied_sla_spec.rb

@@ -0,0 +1,16 @@
+require 'rails_helper'
+
+RSpec.describe AppliedSla, type: :model do
+  describe 'associations' do
+    it { is_expected.to belong_to(:sla_policy) }
+    it { is_expected.to belong_to(:account) }
+    it { is_expected.to belong_to(:conversation) }
+  end
+
+  describe 'validates_factory' do
+    it 'creates valid applied sla policy object' do
+      applied_sla = create(:applied_sla)
+      expect(applied_sla.sla_status).to eq 'active'
+    end
+  end
+end

spec/enterprise/models/sla_policy_spec.rb

@@ -18,6 +18,11 @@ RSpec.describe SlaPolicy, type: :model do
     it 'creates valid sla policy object' do
       sla_policy = create(:sla_policy)
       expect(sla_policy.name).to eq 'sla_1'
+      expect(sla_policy.first_response_time_threshold).to eq 2000
+      expect(sla_policy.description).to eq 'SLA policy for enterprise customers'
+      expect(sla_policy.next_response_time_threshold).to eq 1000
+      expect(sla_policy.resolution_time_threshold).to eq 3000
+      expect(sla_policy.only_during_business_hours).to be false
     end
   end
 end