Added unit test for sidecar containers in TestValidatePodResize

Author: vivzbansal

pkg/apis/core/validation/validation_test.go

@@ -25601,6 +25601,24 @@ func TestValidatePodResize(t *testing.T) {
 			),
 		)...)
 	}
+	mkPodWithInitCtrs := func(req, lim core.ResourceList, tweaks ...podtest.TweakContainer) *core.Pod {
+		tweaks = append(tweaks, podtest.SetContainerRestartPolicy(containerRestartPolicyAlways))
+		return podtest.MakePod("pod",
+			podtest.SetInitContainers(
+				podtest.MakeContainer(
+					"restartable-init",
+					append(tweaks,
+						podtest.SetContainerResources(
+							core.ResourceRequirements{
+								Requests: req,
+								Limits:   lim,
+							},
+						),
+					)...,
+				),
+			),
+		)
+	}
 
 	mkPodWithInitContainers := func(req, lim core.ResourceList, restartPolicy core.ContainerRestartPolicy, tweaks ...podtest.Tweak) *core.Pod {
 		return podtest.MakePod("pod", append(tweaks,
@@ -25620,10 +25638,11 @@ func TestValidatePodResize(t *testing.T) {
 	}
 
 	tests := []struct {
-		test string
-		old  *core.Pod
-		new  *core.Pod
-		err  string
+		test         string
+		old          *core.Pod
+		new          *core.Pod
+		isSideCarCtr bool
+		err          string
 	}{
 		{
 			test: "pod-level resources with container cpu limit change",
@@ -25981,9 +26000,47 @@ func TestValidatePodResize(t *testing.T) {
 			new: mkPod(core.ResourceList{}, getResources("200m", "0", "1Gi", "")),
 			err: "",
 		},
+		{
+			test:         "cpu limit change for sidecar containers",
+			old:          mkPodWithInitCtrs(core.ResourceList{}, getResources("100m", "0", "1Gi", "")),
+			new:          mkPodWithInitCtrs(core.ResourceList{}, getResources("200m", "0", "1Gi", "")),
+			isSideCarCtr: true,
+			err:          "",
+		}, {
+			test:         "memory limit change for sidecar containers",
+			old:          mkPodWithInitCtrs(core.ResourceList{}, getResources("100m", "200Mi", "", "")),
+			new:          mkPodWithInitCtrs(core.ResourceList{}, getResources("100m", "100Mi", "", "")),
+			isSideCarCtr: true,
+			err:          "",
+		}, {
+			test:         "storage limit change for sidecar containers",
+			old:          mkPodWithInitCtrs(core.ResourceList{}, getResources("100m", "100Mi", "2Gi", "")),
+			new:          mkPodWithInitCtrs(core.ResourceList{}, getResources("100m", "100Mi", "1Gi", "")),
+			isSideCarCtr: true,
+			err:          "spec: Forbidden: cpu and memory resources for only sidecar containers are mutable",
+		}, {
+			test:         "cpu request change for sidecar containers",
+			old:          mkPodWithInitCtrs(getResources("200m", "0", "", ""), core.ResourceList{}),
+			new:          mkPodWithInitCtrs(getResources("100m", "0", "", ""), core.ResourceList{}),
+			isSideCarCtr: true,
+			err:          "",
+		}, {
+			test:         "memory request change for sidecar containers",
+			old:          mkPodWithInitCtrs(getResources("0", "100Mi", "", ""), core.ResourceList{}),
+			new:          mkPodWithInitCtrs(getResources("0", "200Mi", "", ""), core.ResourceList{}),
+			isSideCarCtr: true,
+			err:          "",
+		}, {
+			test:         "storage request change for sidecar containers",
+			old:          mkPodWithInitCtrs(getResources("100m", "0", "1Gi", ""), core.ResourceList{}),
+			new:          mkPodWithInitCtrs(getResources("100m", "0", "2Gi", ""), core.ResourceList{}),
+			isSideCarCtr: true,
+			err:          "spec: Forbidden: cpu and memory resources for only sidecar containers are mutable",
+		},
 	}
 
 	for _, test := range tests {
+		featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.SidecarContainers, test.isSideCarCtr)
 		test.new.ObjectMeta.ResourceVersion = "1"
 		test.old.ObjectMeta.ResourceVersion = "1"
 
@@ -25996,6 +26053,12 @@ func TestValidatePodResize(t *testing.T) {
 			test.new.Namespace = "namespace"
 			test.old.Namespace = "namespace"
 		}
+		if test.isSideCarCtr {
+			if test.new.Spec.InitContainers == nil && test.old.Spec.InitContainers == nil {
+				test.new.Spec.InitContainers = []core.Container{{Name: "autoadded", Image: "image", TerminationMessagePolicy: "File", ImagePullPolicy: "Always"}}
+				test.old.Spec.InitContainers = []core.Container{{Name: "autoadded", Image: "image", TerminationMessagePolicy: "File", ImagePullPolicy: "Always"}}
+			}
+		}
 		if test.new.Spec.Containers == nil && test.old.Spec.Containers == nil {
 			test.new.Spec.Containers = []core.Container{{Name: "autoadded", Image: "image", TerminationMessagePolicy: "File", ImagePullPolicy: "Always"}}
 			test.old.Spec.Containers = []core.Container{{Name: "autoadded", Image: "image", TerminationMessagePolicy: "File", ImagePullPolicy: "Always"}}