Restore fallback to deployment_platform_cluster

In 12.2 we will remove this fallback.

1 files changed, 12 insertions, 0 deletions

diff --git a/spec/models/deployment_metrics_spec.rb b/spec/models/deployment_metrics_spec.rb
index 7c574a8b6c8..0aadb1f3a5e 100644
--- a/spec/models/deployment_metrics_spec.rb
+++ b/spec/models/deployment_metrics_spec.rb
@@ -49,6 +49,18 @@ describe DeploymentMetrics do
 
         it { is_expected.to be_truthy }
       end
+
+      context 'fallback deployment platform' do
+        let(:cluster) { create(:cluster, :provided_by_user, environment_scope: '*', projects: [deployment.project]) }
+        let!(:prometheus) { create(:clusters_applications_prometheus, :installed, cluster: cluster) }
+
+        before do
+          expect(deployment.project).to receive(:deployment_platform).and_return(cluster.platform)
+          expect(cluster.application_prometheus).to receive(:can_query?).and_return(true)
+        end
+
+        it { is_expected.to be_truthy }
+      end
     end
   end