1 files changed, 18 insertions, 0 deletions
diff --git a/spec/models/clusters/applications/prometheus_spec.rb b/spec/models/clusters/applications/prometheus_spec.rb
index 696099f7cf7..b9ce597364e 100644
--- a/spec/models/clusters/applications/prometheus_spec.rb
+++ b/spec/models/clusters/applications/prometheus_spec.rb
@@ -6,6 +6,24 @@ describe Clusters::Applications::Prometheus do
 
   include_examples 'cluster application specs', described_class
 
+  describe 'transition to installed' do
+    let(:project) { create(:project) }
+    let(:cluster) { create(:cluster, projects: [project]) }
+    let(:prometheus_service) { double('prometheus_service') }
+
+    subject { create(:clusters_applications_prometheus, :installing, cluster: cluster) }
+
+    before do
+      allow(project).to receive(:prometheus_service).and_return prometheus_service
+    end
+
+    it 'ensures Prometheus service is activated' do
+      expect(prometheus_service).to receive(:update).with(active: true)
+
+      subject.make_installed
+    end
+  end
+
   describe "#chart_values_file" do
     subject { create(:clusters_applications_prometheus).chart_values_file }