1 files changed, 143 insertions, 0 deletions
diff --git a/spec/support/prometheus/additional_metrics_shared_examples.rb b/spec/support/prometheus/additional_metrics_shared_examples.rb
new file mode 100644
index 00000000000..96a9e1f5049
--- /dev/null
+++ b/spec/support/prometheus/additional_metrics_shared_examples.rb
@@ -0,0 +1,143 @@
+RSpec.shared_examples 'additional metrics query' do
+  include Prometheus::MetricBuilders
+
+  before do
+    allow(client).to receive(:label_values).and_return(metric_names)
+    allow(metric_group_class).to receive(:all).and_return([simple_metric_group(metrics: [simple_metric])])
+  end
+
+  let(:metric_group_class) { Gitlab::Prometheus::MetricGroup }
+  let(:metric_class) { Gitlab::Prometheus::Metric }
+
+  context 'with one group where two metrics is found' do
+    before do
+      allow(metric_group_class).to receive(:all).and_return([simple_metric_group])
+    end
+
+    context 'some queries return results' do
+      before do
+        allow(client).to receive(:query_range).with('query_range_a', any_args).and_return(query_range_result)
+        allow(client).to receive(:query_range).with('query_range_b', any_args).and_return(query_range_result)
+        allow(client).to receive(:query_range).with('query_range_empty', any_args).and_return([])
+      end
+
+      it 'return group data only for queries with results' do
+        expected = [
+          {
+            group: 'name',
+            priority: 1,
+            metrics: [
+              {
+                title: 'title', weight: nil, y_label: 'Values', queries: [
+                { query_range: 'query_range_a', result: query_range_result },
+                { query_range: 'query_range_b', label: 'label', unit: 'unit', result: query_range_result }
+              ]
+              }
+            ]
+          }
+        ]
+
+        expect(query_result).to eq(expected)
+      end
+    end
+  end
+
+  context 'with two groups with one metric each' do
+    let(:metrics) { [simple_metric(queries: [simple_query])] }
+    before do
+      allow(metric_group_class).to receive(:all).and_return(
+        [
+          simple_metric_group(name: 'group_a', metrics: [simple_metric(queries: [simple_query])]),
+          simple_metric_group(name: 'group_b', metrics: [simple_metric(title: 'title_b', queries: [simple_query('b')])])
+        ])
+      allow(client).to receive(:label_values).and_return(metric_names)
+    end
+
+    context 'both queries return results' do
+      before do
+        allow(client).to receive(:query_range).with('query_range_a', any_args).and_return(query_range_result)
+        allow(client).to receive(:query_range).with('query_range_b', any_args).and_return(query_range_result)
+      end
+
+      it 'return group data both queries' do
+        expected = [
+          {
+            group: 'group_a',
+            priority: 1,
+            metrics: [
+              {
+                title: 'title',
+                weight: nil,
+                y_label: 'Values',
+                queries: [
+                  {
+                    query_range: 'query_range_a',
+                    result: [
+                      {
+                        metric: {},
+                        values: [[1488758662.506, '0.00002996364761904785'], [1488758722.506, '0.00003090239047619091']] }
+                    ]
+                  }
+                ]
+              }
+            ]
+          },
+          {
+            group: 'group_b',
+            priority: 1,
+            metrics: [
+              {
+                title: 'title_b',
+                weight: nil,
+                y_label: 'Values',
+                queries: [
+                  {
+                    query_range: 'query_range_b', result: [
+                    {
+                      metric: {},
+                      values: [[1488758662.506, '0.00002996364761904785'], [1488758722.506, '0.00003090239047619091']]
+                    }
+                  ]
+                  }
+                ]
+              }
+            ]
+          }
+        ]
+
+        expect(query_result).to eq(expected)
+      end
+    end
+
+    context 'one query returns result' do
+      before do
+        allow(client).to receive(:query_range).with('query_range_a', any_args).and_return(query_range_result)
+        allow(client).to receive(:query_range).with('query_range_b', any_args).and_return([])
+      end
+
+      it 'return group data only for query with results' do
+        expected = [
+          {
+            group: 'group_a',
+            priority: 1,
+            metrics: [
+              {
+                title: 'title',
+                weight: nil,
+                y_label: 'Values',
+                queries: [
+                  {
+                    query_range: 'query_range_a',
+                    result: query_range_result
+                  }
+                ]
+              }
+            ]
+          }
+        ]
+
+        expect(query_result).to eq(expected)
+      end
+    end
+  end
+end
+\ No newline at end of file