🌱Add test for hcloudmachine webhooks

controllers/hcloudmachine_controller_test.go

@@ -627,6 +627,55 @@ var _ = Describe("HCloudMachine validation", func() {
 	})
 })
 
+var _ = Describe("HcloudMachine Webhook Validation", func(){
+	var(
+		hcloudMachine *infrav1.HCloudMachine
+		oldHCloudMachine *infrav1.HCloudMachine
+		testNs        *corev1.Namespace
+	)
+	BeforeEach(func ()  {
+		var err error
+		testNs, err = testEnv.CreateNamespace(ctx, "hcloudmachine-validation")
+		Expect(err).NotTo(HaveOccurred())
+		hcloudMachine = &infrav1.HCloudMachine{
+			ObjectMeta: metav1.ObjectMeta{
+				Name:      "hcloud-validation-machine",
+				Namespace: testNs.Name,
+			},
+			Spec: infrav1.HCloudMachineSpec{
+                Type: "cpx31",
+                ImageName: "ubuntu",
+            },
+        }
+        oldHCloudMachine = hcloudMachine.DeepCopy()
+        oldHCloudMachine.Spec.Type = "cpx21"
+        oldHCloudMachine.Spec.ImageName = "ubuntu-18.04"
+	})
+	AfterEach(func() {
+		Expect(testEnv.Cleanup(ctx, testNs, hcloudMachine)).To(Succeed())
+	})
+	It("should allow valid HCloudMachine creation", func(){
+		warnings, err := hcloudMachine.ValidateCreate()
+		Expect(warnings).To(BeNil())
+		Expect(err).To(BeNil())
+	})
+	It("should prevent updating immutable fields",func ()  {
+		newHCloudMachine := hcloudMachine.DeepCopy()
+		newHCloudMachine.Spec.Type = "cpx32"
+		newHCloudMachine.Spec.ImageName = "fedora-control-plane"
+
+		warnings,err := newHCloudMachine.ValidateUpdate(oldHCloudMachine)
+		Expect(warnings).To(BeNil())
+		Expect(err).To(HaveOccurred())
+		Expect(err.Error()).To(ContainSubstring("field is immutable"))
+	})
+	It("should allow valid HCloudMachine deleteion",func ()  {
+		warnings,err := hcloudMachine.ValidateDelete()
+		Expect(warnings).To(BeNil())
+		Expect(err).To(BeNil())
+	})
+})
+
 var _ = Describe("IgnoreHetznerClusterConditionUpdates Predicate", func() {
 	var (
 		predicate predicate.Predicate