Tests for query context variables

app/models/project_services/prometheus_service.rb

@@ -75,11 +75,6 @@ class PrometheusService < MonitoringService
     with_reactive_cache(Gitlab::Prometheus::Queries::MatchedMetricsQuery.name, &:itself)
   end
 
-  def with_reactive_cache(name, *args, &block)
-    vals = args.map(&:to_s)
-    yield calculate_reactive_cache(name, *vals)
-  end
-
   # Cache metrics for specific environment
   def calculate_reactive_cache(query_class_name, *args)
     return unless active? && project && !project.pending_delete?

spec/lib/gitlab/prometheus/queries/additional_metrics_environment_query_spec.rb

@@ -6,11 +6,11 @@ describe Gitlab::Prometheus::Queries::AdditionalMetricsEnvironmentQuery do
   end
 
   include_examples 'additional metrics query' do
-    let(:query_result) { described_class.new(client).query(environment.id) }
     let(:query_params) { [environment.id] }
 
     it 'queries using specific time' do
       expect(client).to receive(:query_range).with(anything, start: 8.hours.ago.to_f, stop: Time.now.to_f)
+
       expect(query_result).not_to be_nil
     end
   end

spec/support/prometheus/additional_metrics_shared_examples.rb

@@ -11,6 +11,7 @@ RSpec.shared_examples 'additional metrics query' do
   end
 
   let(:client) { double('prometheus_client') }
+  let(:query_result) { described_class.new(client).query(*query_params) }
   let(:environment) { create(:environment, slug: 'environment-slug') }
 
   before do
@@ -18,31 +19,52 @@ RSpec.shared_examples 'additional metrics query' do
     allow(metric_group_class).to receive(:all).and_return([simple_metric_group(metrics: [simple_metric])])
   end
 
-  context 'metrics rendering' do
+  context 'metrics query context' do
     subject! { described_class.new(client) }
 
-    before do
+    shared_examples 'query context containing environment slug and filter' do
+      it 'query context contains ci_environment_slug' do
+        expect(subject).to receive(:query_metrics).with(hash_including(ci_environment_slug: environment.slug))
 
+        subject.query(*query_params)
       end
 
-    describe 'project has kubernetes service' do
+      it 'query context contains environment filter' do
+        expect(subject).to receive(:query_metrics).with(
+          hash_including(
+            environment_filter: "container_name!=\"POD\",environment=\"#{environment.slug}\""
+          )
+        )
+        subject.query(*query_params)
+      end
+    end
+
+    describe 'project has Kubernetes service' do
       let(:project) { create(:kubernetes_project) }
       let(:environment) { create(:environment, slug: 'environment-slug', project: project) }
       let(:kube_namespace) { project.kubernetes_service.actual_namespace }
 
-      it 'query context contains kube namespace' do
-        expect(subject).to receive(:query_metrics).with(
-          hash_including(
-            kube_namespace: kube_namespace)
-        )
+      it_behaves_like 'query context containing environment slug and filter'
+
+      it 'query context contains kube_namespace' do
+        expect(subject).to receive(:query_metrics).with(hash_including(kube_namespace: kube_namespace))
+
+        subject.query(*query_params)
+      end
+    end
+
+    describe 'project without Kubernetes service' do
+      it_behaves_like 'query context containing environment slug and filter'
+
+      it 'query context contains empty kube_namespace' do
+        expect(subject).to receive(:query_metrics).with(hash_including(kube_namespace: ''))
+
         subject.query(*query_params)
       end
     end
   end
 
   context 'with one group where two metrics is found' do
-    let(:query_result) { described_class.new(client).query(*query_params) }
-
     before do
       allow(metric_group_class).to receive(:all).and_return([simple_metric_group])
     end
@@ -77,7 +99,6 @@ RSpec.shared_examples 'additional metrics query' do
   end
 
   context 'with two groups with one metric each' do
-    let(:query_result) { described_class.new(client).query(*query_params) }
     let(:metrics) { [simple_metric(queries: [simple_query])] }
 
     before do