HPA metrics initial tests

Signed-off-by: Alex Andreev <alex.andreev.email@gmail.com>

src/common/k8s-api/__tests__/horizontal-pod-autoscaler.api.test.ts

@@ -0,0 +1,107 @@
+import { HorizontalPodAutoscaler, HpaMetricType } from "../endpoints";
+
+const hpaV2 = {
+  apiVersion: "autoscaling/v2",
+  kind: "HorizontalPodAutoscaler",
+  metadata: {
+    name: "hpav2",
+    resourceVersion: "1",
+    uid: "hpav2",
+    namespace: "default",
+    selfLink: "/apis/autoscaling/v2/namespaces/default/horizontalpodautoscalers/hpav2",
+  },
+  spec: {
+    maxReplicas: 10,
+    scaleTargetRef: {
+      kind: "Deployment",
+      name: "hpav2deployment",
+      apiVersion: "apps/v1",
+    }
+  }
+}
+
+describe("HorizontalPodAutoscalerApi", () => {
+  describe("HPA v1", () => {
+    it("should return correct empty metrics", () => {
+      const hpa = new HorizontalPodAutoscaler(hpaV2);
+
+      expect(hpa.getMetrics()).toHaveLength(0);
+    });
+
+    it("should return correct resource metrics", () => {
+      const hpa = new HorizontalPodAutoscaler({
+        ...hpaV2,
+        spec: {
+          ...hpaV2.spec,
+          metrics: [
+            {
+              type: HpaMetricType.Resource,
+              resource: {
+                name: "cpu",
+                target: {
+                  type: "Utilization",
+                  averageUtilization: 50
+                }
+              }
+            }
+          ]
+        }
+      });
+
+      expect(hpa.getMetricValues(hpa.getMetrics()[0])).toEqual("unknown / 50%");
+    });
+
+    it("should return correct container resource metrics", () => {
+      const hpa = new HorizontalPodAutoscaler(
+        {
+          ...hpaV2,
+          spec: {
+            ...hpaV2.spec,
+            metrics: [
+              {
+                type: HpaMetricType.ContainerResource,
+                containerResource: {
+                  name: "cpu",
+                  container: "nginx",
+                  target: {
+                    type: "Utilization",
+                    averageUtilization: 60
+                  }
+                }
+              }
+            ]
+          }
+        }
+      );
+
+      expect(hpa.getMetricValues(hpa.getMetrics()[0])).toEqual("unknown / 60%");
+    });
+
+    it("should return correct pod metrics", () => {
+      const hpa = new HorizontalPodAutoscaler(
+        {
+          ...hpaV2,
+          spec: {
+            ...hpaV2.spec,
+            metrics: [
+              {
+                type: HpaMetricType.Pods,
+                pods: {
+                  metric: {
+                    name: "packets-per-second"
+                  },
+                  target: {
+                    type: "AverageValue",
+                    averageValue: "1k"
+                  }
+                }
+              }
+            ]
+          }
+        }
+      );
+
+      expect(hpa.getMetricValues(hpa.getMetrics()[0])).toEqual("unknown / 1k");
+    });
+  });
+});