Added rspec tests

Added tests for changes made on Prometheus class.
Added tests for changes made on Environments class.

spec/models/clusters/applications/prometheus_spec.rb

@@ -289,4 +289,28 @@ describe Clusters::Applications::Prometheus do
       end
     end
   end
+
+  describe '#configured?' do
+    let(:prometheus) { create(:clusters_applications_prometheus, :installed, cluster: cluster) }
+
+    subject { prometheus.configured? }
+
+    context 'when a kubenetes client is present' do
+      let(:cluster) { create(:cluster, :project, :provided_by_gcp) }
+
+      it { is_expected.to be_truthy }
+
+      context 'when it is not availalble' do
+        let(:prometheus) { create(:clusters_applications_prometheus, cluster: cluster) }
+
+        it { is_expected.to be_falsey }
+      end
+    end
+
+    context 'when a kubenetes client is not present' do
+      let(:cluster) { create(:cluster) }
+
+      it { is_expected.to be_falsy }
+    end
+  end
 end

spec/models/environment_spec.rb

@@ -824,6 +824,14 @@ describe Environment, :use_clean_rails_memory_store_caching do
         context 'and no deployments' do
           it { is_expected.to be_truthy }
         end
+
+        context 'and the prometheus adapter is not configured' do
+          before do
+            allow(environment.prometheus_adapter).to receive(:configured?).and_return(false)
+          end
+
+          it { is_expected.to be_falsy }
+        end
       end
 
       context 'without a monitoring service' do
@@ -858,6 +866,14 @@ describe Environment, :use_clean_rails_memory_store_caching do
 
         is_expected.to eq(:fake_metrics)
       end
+
+      context 'and the prometheus client is not present' do
+        before do
+          allow(environment.prometheus_adapter).to receive(:promethus_client).and_return(nil)
+        end
+
+        it { is_expected.to be_nil }
+      end
     end
 
     context 'when the environment does not have metrics' do