Check behaviour when adding more than one cluster

spec/services/clusters/create_service_spec.rb

@@ -7,7 +7,63 @@ describe Clusters::CreateService do
   let(:result) { described_class.new(project, user, params).execute(access_token) }
 
   context 'when provider is gcp' do
-    context 'when correct params' do
+    context 'when project has no clusters' do
+      context 'when correct params' do
+        let(:params) do
+          {
+            name: 'test-cluster',
+            provider_type: :gcp,
+            provider_gcp_attributes: {
+              gcp_project_id: 'gcp-project',
+              zone: 'us-central1-a',
+              num_nodes: 1,
+              machine_type: 'machine_type-a'
+            }
+          }
+        end
+
+        it 'creates a cluster object and performs a worker' do
+          expect(ClusterProvisionWorker).to receive(:perform_async)
+
+          expect { result }
+            .to change { Clusters::Cluster.count }.by(1)
+            .and change { Clusters::Providers::Gcp.count }.by(1)
+
+          expect(result.name).to eq('test-cluster')
+          expect(result.user).to eq(user)
+          expect(result.project).to eq(project)
+          expect(result.provider.gcp_project_id).to eq('gcp-project')
+          expect(result.provider.zone).to eq('us-central1-a')
+          expect(result.provider.num_nodes).to eq(1)
+          expect(result.provider.machine_type).to eq('machine_type-a')
+          expect(result.provider.access_token).to eq(access_token)
+          expect(result.platform).to be_nil
+        end
+      end
+
+      context 'when invalid params' do
+        let(:params) do
+          {
+            name: 'test-cluster',
+            provider_type: :gcp,
+            provider_gcp_attributes: {
+              gcp_project_id: '!!!!!!!',
+              zone: 'us-central1-a',
+              num_nodes: 1,
+              machine_type: 'machine_type-a'
+            }
+          }
+        end
+
+        it 'returns an error' do
+          expect(ClusterProvisionWorker).not_to receive(:perform_async)
+          expect { result }.to change { Clusters::Cluster.count }.by(0)
+          expect(result.errors[:"provider_gcp.gcp_project_id"]).to be_present
+        end
+      end
+    end
+
+    context 'when project has a cluster' do
       let(:params) do
         {
           name: 'test-cluster',
@@ -21,43 +77,13 @@ describe Clusters::CreateService do
         }
       end
 
-      it 'creates a cluster object and performs a worker' do
-        expect(ClusterProvisionWorker).to receive(:perform_async)
-
-        expect { result }
-          .to change { Clusters::Cluster.count }.by(1)
-          .and change { Clusters::Providers::Gcp.count }.by(1)
-
-        expect(result.name).to eq('test-cluster')
-        expect(result.user).to eq(user)
-        expect(result.project).to eq(project)
-        expect(result.provider.gcp_project_id).to eq('gcp-project')
-        expect(result.provider.zone).to eq('us-central1-a')
-        expect(result.provider.num_nodes).to eq(1)
-        expect(result.provider.machine_type).to eq('machine_type-a')
-        expect(result.provider.access_token).to eq(access_token)
-        expect(result.platform).to be_nil
-      end
-    end
-
-    context 'when invalid params' do
-      let(:params) do
-        {
-          name: 'test-cluster',
-          provider_type: :gcp,
-          provider_gcp_attributes: {
-            gcp_project_id: '!!!!!!!',
-            zone: 'us-central1-a',
-            num_nodes: 1,
-            machine_type: 'machine_type-a'
-          }
-        }
+      before do
+        Clusters::Cluster.create(params.merge(user: user, projects: [project]))
       end
 
-      it 'returns an error' do
+      it 'does not create a cluster' do
         expect(ClusterProvisionWorker).not_to receive(:perform_async)
         expect { result }.to change { Clusters::Cluster.count }.by(0)
-        expect(result.errors[:"provider_gcp.gcp_project_id"]).to be_present
       end
     end
   end