Add the unit test template for webhook and controllers.

Signed-off-by: dashanji <dashanjic@gmail.com>

docs/book/src/cronjob-tutorial/testdata/project/api/v1/cronjob_webhook_test.go

@@ -0,0 +1,84 @@
+/*
+Copyright 2023 The Kubernetes authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1
+
+import (
+	. "github.com/onsi/ginkgo/v2"
+)
+
+var _ = Describe("CronJob Webhook", func() {
+
+	Context("When creating CronJob under Defaulting Webhook", func() {
+		It("Should fill in the default value if a required field is empty", func() {
+			/*
+			   // Assuming CronJob has a field "Memory" that shouldn't be lower than 100Mi,
+			   // and the logic of the defaulting webhook is to set Memory to 100Mi if it's lower than 100Mi.
+			   cronjob := &CronJob{
+			       Spec: CronJobSpec{
+			           Memory: "10Mi",
+			           // other fields...
+			       },
+			   }
+
+			   err := k8sClient.Create(context.Background(), cronjob)
+			   Expect(err).NotTo(HaveOccurred())
+			   Expect(cronjob.Spec.Memory).To(Equal("100Mi")) // Expect the default value to be set.
+			   // Add more assertions if needed.
+			*/
+		})
+		// TODO(user): Add the test cases for defaulting webhook.
+	})
+
+	Context("When creating CronJob under Validating Webhook", func() {
+		It("Should deny if a required field is empty", func() {
+			/*
+			   // Assuming CronJob has a field "Name" that shouldn't be empty.
+			   cronjob := &CronJob{
+			       ObjectMeta: metav1.ObjectMeta{
+			           Name:      "test-CronJob",
+			           Namespace: "default",
+			       },
+			       Spec: CronJobSpec{
+			           // fill in the required fields
+			       },
+			   }
+			   Expect(k8sClient.Create(ctx, cronjob)).To(Succeed())
+
+			   err := k8sClient.Create(context.Background(), cronjob)
+			   Expect(err).To(HaveOccurred())  // Expect an error because the Name field is empty.
+			   // Optionally, you can check for specific error messages or types.
+			*/
+
+		})
+
+		It("Should admit if all required fields are provided", func() {
+			/*
+			   cronjob := &CronJob{
+			       Spec: CronJobSpec{
+			           Name: "ValidName",
+			           // other fields...
+			       },
+			   }
+
+			   err := k8sClient.Create(context.Background(), cronjob)
+			   Expect(err).NotTo(HaveOccurred()) // Expect no error as it's a valid resource.
+			*/
+		})
+		// TODO(user): Add the test cases for validating webhook.
+	})
+
+})

pkg/plugin/util/testdata/exampleFile.txt

@@ -1 +1 @@
-exampleTargetexampleCodeexampleCodeexampleCodeexampleCodeexampleCodeexampleCode
+exampleTargetexampleCodeexampleCodeexampleCodeexampleCodeexampleCodeexampleCodeexampleCode

pkg/plugins/common/kustomize/v2/scaffolds/api.go

@@ -18,6 +18,7 @@ package scaffolds
 
 import (
 	"fmt"
+
 	pluginutil "sigs.k8s.io/kubebuilder/v3/pkg/plugin/util"
 
 	log "github.com/sirupsen/logrus"

pkg/plugins/golang/deploy-image/v1alpha1/scaffolds/internal/templates/controllers/controller-test.go

@@ -64,6 +64,8 @@ func (f *ControllerTest) SetTemplateDefaults() error {
 		f.PackageName = "controllers"
 	}
 
+	f.IfExistsAction = machinery.OverwriteFile
+
 	log.Println("creating import for %", f.Resource.Path)
 	f.TemplateBody = controllerTestTemplate
 

pkg/plugins/golang/v3/scaffolds/api.go

@@ -99,6 +99,7 @@ func (s *apiScaffolder) Scaffold() error {
 		if err := scaffold.Execute(
 			&controllers.SuiteTest{Force: s.force},
 			&controllers.Controller{ControllerRuntimeVersion: ControllerRuntimeVersion, Force: s.force},
+			&controllers.ControllerTest{Force: s.force, DoAPI: doAPI},
 		); err != nil {
 			return fmt.Errorf("error scaffolding controller: %v", err)
 		}

pkg/plugins/golang/v3/scaffolds/internal/templates/api/webhook_test_template.go

@@ -0,0 +1,191 @@
+/*
+Copyright 2022 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package api
+
+import (
+	"fmt"
+	"path/filepath"
+	"strings"
+
+	log "github.com/sirupsen/logrus"
+
+	"sigs.k8s.io/kubebuilder/v3/pkg/machinery"
+)
+
+var _ machinery.Template = &WebhookTest{}
+
+// WebhookTest scaffolds the file that sets up the webhook unit tests
+type WebhookTest struct { // nolint:maligned
+	machinery.TemplateMixin
+	machinery.MultiGroupMixin
+	machinery.BoilerplateMixin
+	machinery.ResourceMixin
+
+	Force bool
+}
+
+// SetTemplateDefaults implements file.Template
+func (f *WebhookTest) SetTemplateDefaults() error {
+	if f.Path == "" {
+		if f.MultiGroup {
+			if f.Resource.Group != "" {
+				f.Path = filepath.Join("apis", "%[group]", "%[version]", "%[kind]_webhook_test.go")
+			} else {
+				f.Path = filepath.Join("apis", "%[version]", "%[kind]_webhook_test.go")
+			}
+		} else {
+			f.Path = filepath.Join("api", "%[version]", "%[kind]_webhook_test.go")
+		}
+	}
+	f.Path = f.Resource.Replacer().Replace(f.Path)
+	log.Println(f.Path)
+
+	webhookTestTemplate := webhookTestTemplate
+	templates := make([]string, 0)
+	if f.Resource.HasDefaultingWebhook() {
+		templates = append(templates, defaultWebhookTestTemplate)
+	}
+	if f.Resource.HasValidationWebhook() {
+		templates = append(templates, validateWebhookTestTemplate)
+	}
+	if f.Resource.HasConversionWebhook() {
+		templates = append(templates, conversionWebhookTestTemplate)
+	}
+	f.TemplateBody = fmt.Sprintf(webhookTestTemplate, strings.Join(templates, "\n"))
+
+	if f.Force {
+		f.IfExistsAction = machinery.OverwriteFile
+	}
+
+	return nil
+}
+
+const webhookTestTemplate = `{{ .Boilerplate }}
+
+package {{ .Resource.Version }}
+
+import (
+	. "github.com/onsi/ginkgo/v2"
+)
+
+var _ = Describe("{{ .Resource.Kind }} Webhook", func() {
+    %s
+})
+`
+
+const conversionWebhookTestTemplate = `
+Context("When creating {{ .Resource.Kind }} under Conversion Webhook", func() {
+    It("Should get the converted version of {{ .Resource.Kind }}" , func() {
+        /*
+        // Assuming {{ .Resource.Kind }} has a previous version named "v1alpha1" and current version named "v1".
+        typeResourceName := types.NamespacedName{
+            Name:      "test-{{ .Resource.Kind }}",
+            Namespace: "default",
+        }
+
+        {{ lower .Resource.Kind }} := &{{ .Resource.Kind }}V1alpha1.{{ .Resource.Kind }}{
+            ObjectMeta: metav1.ObjectMeta{
+                Name:      "test-{{ .Resource.Kind }}",
+                Namespace: "default",
+            },
+            Spec: {{ .Resource.Kind }}Spec{
+                // fill in the required fields
+            },
+        }
+        Expect(k8sClient.Create(ctx, {{ lower .Resource.Kind }})).To(Succeed())
+
+        // check if the converted version of {{ .Resource.Kind }} can be retrieved.
+        converted{{ .Resource.Kind }} := &{{ .Resource.Kind }}V1.{{ .Resource.Kind }}{}
+        err := k8sClient.Get(context.Background(), typeResourceName, converted{{ .Resource.Kind }})
+        {{ lower .Resource.Kind }}V1 := &{{ .Resource.Kind }}V1.{{ .Resource.Kind }}{}
+
+        err := k8sClient.Create(context.Background(), client.ObjectKey{
+            Name:      "test-{{ .Resource.Kind }}",
+            Namespace: "default",
+        }, &converted{{ .Resource.Kind }})
+        Expect(err).NotTo(HaveOccurred())
+
+        // Optionally, you can check for the converted object's fields.
+
+        */
+    })
+    // TODO(user): Add the test cases for conversion webhook.
+})
+`
+
+const validateWebhookTestTemplate = `
+Context("When creating {{ .Resource.Kind }} under Validating Webhook", func() {
+    It("Should deny if a required field is empty", func() {
+        /*
+        // Assuming {{ .Resource.Kind }} has a field "Name" that shouldn't be empty.
+        {{ lower .Resource.Kind }} := &{{ .Resource.Kind }}{
+            ObjectMeta: metav1.ObjectMeta{
+                Name:      "test-{{ .Resource.Kind }}",
+                Namespace: "default",
+            },
+            Spec: {{ .Resource.Kind }}Spec{
+                // fill in the required fields
+            },
+        }
+        Expect(k8sClient.Create(ctx, {{ lower .Resource.Kind }})).To(Succeed())
+
+        err := k8sClient.Create(context.Background(), {{ lower .Resource.Kind }})
+        Expect(err).To(HaveOccurred())  // Expect an error because the Name field is empty.
+        // Optionally, you can check for specific error messages or types.
+        */
+        
+    })
+
+    It("Should admit if all required fields are provided", func() {
+        /*
+        {{ lower .Resource.Kind }} := &{{ .Resource.Kind }}{
+            Spec: {{ .Resource.Kind }}Spec{
+                Name: "ValidName",
+                // other fields...
+            },
+        }
+
+        err := k8sClient.Create(context.Background(), {{ lower .Resource.Kind }})
+        Expect(err).NotTo(HaveOccurred()) // Expect no error as it's a valid resource.
+        */
+    })
+    // TODO(user): Add the test cases for validating webhook.
+})
+`
+
+const defaultWebhookTestTemplate = `
+Context("When creating {{ .Resource.Kind }} under Defaulting Webhook", func() {
+    It("Should fill in the default value if a required field is empty", func() {
+        /*
+        // Assuming {{ .Resource.Kind }} has a field "Memory" that shouldn't be lower than 100Mi,
+        // and the logic of the defaulting webhook is to set Memory to 100Mi if it's lower than 100Mi.
+        {{ lower .Resource.Kind }} := &{{ .Resource.Kind }}{
+            Spec: {{ .Resource.Kind }}Spec{
+                Memory: "10Mi",
+                // other fields...
+            },
+        }
+
+        err := k8sClient.Create(context.Background(), {{ lower .Resource.Kind }})
+        Expect(err).NotTo(HaveOccurred())
+        Expect({{ lower .Resource.Kind }}.Spec.Memory).To(Equal("100Mi")) // Expect the default value to be set.
+        // Add more assertions if needed.
+        */
+    })
+    // TODO(user): Add the test cases for defaulting webhook.
+})
+`