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Merge pull request #5532 from mohamedawnallah/unitTestWorkWebhook
pkg/webhook: unit test Work
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/* | ||
Copyright 2024 The Karmada 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. | ||
*/ | ||
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package work | ||
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import ( | ||
"context" | ||
"encoding/json" | ||
"errors" | ||
"fmt" | ||
"net/http" | ||
"reflect" | ||
"strings" | ||
"testing" | ||
"time" | ||
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admissionv1 "k8s.io/api/admission/v1" | ||
appsv1 "k8s.io/api/apps/v1" | ||
corev1 "k8s.io/api/core/v1" | ||
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured" | ||
"k8s.io/apimachinery/pkg/runtime" | ||
schema "k8s.io/apimachinery/pkg/runtime/schema" | ||
"sigs.k8s.io/controller-runtime/pkg/webhook/admission" | ||
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workv1alpha1 "github.com/karmada-io/karmada/pkg/apis/work/v1alpha1" | ||
workv1alpha2 "github.com/karmada-io/karmada/pkg/apis/work/v1alpha2" | ||
) | ||
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type fakeMutationDecoder struct { | ||
err error | ||
obj runtime.Object | ||
} | ||
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// Decode mocks the Decode method of admission.Decoder. | ||
func (f *fakeMutationDecoder) Decode(_ admission.Request, obj runtime.Object) error { | ||
if f.err != nil { | ||
return f.err | ||
} | ||
if f.obj != nil { | ||
reflect.ValueOf(obj).Elem().Set(reflect.ValueOf(f.obj).Elem()) | ||
} | ||
return nil | ||
} | ||
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// DecodeRaw mocks the DecodeRaw method of admission.Decoder. | ||
func (f *fakeMutationDecoder) DecodeRaw(_ runtime.RawExtension, obj runtime.Object) error { | ||
if f.err != nil { | ||
return f.err | ||
} | ||
if f.obj != nil { | ||
reflect.ValueOf(obj).Elem().Set(reflect.ValueOf(f.obj).Elem()) | ||
} | ||
return nil | ||
} | ||
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func TestMutatingAdmission_Handle(t *testing.T) { | ||
tests := []struct { | ||
name string | ||
decoder admission.Decoder | ||
req admission.Request | ||
want admission.Response | ||
}{ | ||
{ | ||
name: "Handle_DecodeError_DeniesAdmission", | ||
decoder: &fakeMutationDecoder{ | ||
err: errors.New("decode error"), | ||
}, | ||
req: admission.Request{}, | ||
want: admission.Errored(http.StatusBadRequest, errors.New("decode error")), | ||
}, | ||
} | ||
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for _, tt := range tests { | ||
t.Run(tt.name, func(t *testing.T) { | ||
m := MutatingAdmission{ | ||
Decoder: tt.decoder, | ||
} | ||
got := m.Handle(context.Background(), tt.req) | ||
if !reflect.DeepEqual(got, tt.want) { | ||
t.Errorf("Handle() = %v, want %v", got, tt.want) | ||
} | ||
}) | ||
} | ||
} | ||
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func TestMutatingAdmission_Handle_FullCoverage(t *testing.T) { | ||
// Define the work object name and namespace to be used in the test. | ||
name := "test-work" | ||
namespace := "test-namespace" | ||
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deployment := &appsv1.Deployment{ | ||
TypeMeta: metav1.TypeMeta{ | ||
APIVersion: "apps/v1", | ||
Kind: "Deployment", | ||
}, | ||
ObjectMeta: metav1.ObjectMeta{ | ||
Name: "test-deployment", | ||
Namespace: namespace, | ||
CreationTimestamp: metav1.Time{Time: time.Date(2024, 1, 1, 12, 0, 0, 0, time.UTC)}, | ||
DeletionTimestamp: nil, | ||
DeletionGracePeriodSeconds: func(i int64) *int64 { return &i }(30), | ||
Generation: 2, | ||
ManagedFields: []metav1.ManagedFieldsEntry{ | ||
{ | ||
Manager: "kube-controller-manager", | ||
Operation: "Apply", | ||
APIVersion: "apps/v1", | ||
}, | ||
}, | ||
ResourceVersion: "123456", | ||
SelfLink: fmt.Sprintf("/apis/apps/v1/namespaces/%s/deployments/test-deployment", namespace), | ||
UID: "abcd-1234-efgh-5678", | ||
OwnerReferences: []metav1.OwnerReference{ | ||
{ | ||
APIVersion: "apps/v1", | ||
Kind: "Deployment", | ||
Name: "owner-deployment", | ||
UID: "owner-uid-1234", | ||
}, | ||
}, | ||
Finalizers: []string{"foregroundDeletion"}, | ||
Labels: map[string]string{}, | ||
Annotations: nil, | ||
}, | ||
Spec: appsv1.DeploymentSpec{ | ||
Replicas: func(i int32) *int32 { return &i }(3), | ||
Selector: &metav1.LabelSelector{ | ||
MatchLabels: map[string]string{ | ||
"app": "test", | ||
}, | ||
}, | ||
Template: corev1.PodTemplateSpec{ | ||
ObjectMeta: metav1.ObjectMeta{ | ||
Labels: map[string]string{ | ||
"app": "test", | ||
}, | ||
}, | ||
Spec: corev1.PodSpec{ | ||
Containers: []corev1.Container{ | ||
{ | ||
Name: "nginx", | ||
Image: "nginx:stable-alpine-perl", | ||
Ports: []corev1.ContainerPort{ | ||
{ | ||
ContainerPort: 80, | ||
}, | ||
}, | ||
}, | ||
}, | ||
}, | ||
}, | ||
}, | ||
Status: appsv1.DeploymentStatus{}, | ||
} | ||
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// Marshal the Deployment object to JSON | ||
deploymentRaw, err := json.Marshal(deployment) | ||
if err != nil { | ||
fmt.Println("Error marshaling deployment:", err) | ||
return | ||
} | ||
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// Mock a request with a specific namespace. | ||
req := admission.Request{ | ||
AdmissionRequest: admissionv1.AdmissionRequest{ | ||
Namespace: namespace, | ||
Operation: admissionv1.Create, | ||
}, | ||
} | ||
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// Create the initial work object with default values for testing. | ||
workObj := &workv1alpha1.Work{ | ||
ObjectMeta: metav1.ObjectMeta{ | ||
Name: name, | ||
Namespace: namespace, | ||
Labels: map[string]string{}, | ||
}, | ||
Spec: workv1alpha1.WorkSpec{ | ||
Workload: workv1alpha1.WorkloadTemplate{ | ||
Manifests: []workv1alpha1.Manifest{ | ||
{ | ||
RawExtension: runtime.RawExtension{ | ||
Raw: deploymentRaw, | ||
}, | ||
}, | ||
}, | ||
}, | ||
}, | ||
} | ||
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// Define the expected work object after mutations. | ||
wantDeployment := &appsv1.Deployment{ | ||
TypeMeta: metav1.TypeMeta{ | ||
APIVersion: "apps/v1", | ||
Kind: "Deployment", | ||
}, | ||
ObjectMeta: metav1.ObjectMeta{ | ||
Name: "test-deployment", | ||
Namespace: namespace, | ||
Annotations: map[string]string{ | ||
workv1alpha2.ManagedAnnotation: strings.Join( | ||
[]string{workv1alpha2.ManagedAnnotation, workv1alpha2.ManagedLabels}, ",", | ||
), | ||
workv1alpha2.ManagedLabels: workv1alpha2.WorkPermanentIDLabel, | ||
}, | ||
Labels: map[string]string{ | ||
workv1alpha2.WorkPermanentIDLabel: "some-unique-id", | ||
}, | ||
}, | ||
Spec: appsv1.DeploymentSpec{ | ||
Replicas: func(i int32) *int32 { return &i }(3), | ||
Selector: &metav1.LabelSelector{ | ||
MatchLabels: map[string]string{ | ||
"app": "test", | ||
}, | ||
}, | ||
Template: corev1.PodTemplateSpec{ | ||
ObjectMeta: metav1.ObjectMeta{ | ||
Labels: map[string]string{ | ||
"app": "test", | ||
}, | ||
}, | ||
Spec: corev1.PodSpec{ | ||
Containers: []corev1.Container{ | ||
{ | ||
Name: "nginx", | ||
Image: "nginx:stable-alpine-perl", | ||
Ports: []corev1.ContainerPort{ | ||
{ | ||
ContainerPort: 80, | ||
}, | ||
}, | ||
}, | ||
}, | ||
}, | ||
}, | ||
}, | ||
} | ||
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// Marshal appsv1.Deployment object into JSON. | ||
wantDeploymentJSON, err := json.Marshal(wantDeployment) | ||
if err != nil { | ||
t.Errorf("Error marshaling deployment: %v", err) | ||
} | ||
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// Convert the deployment object to unstructured to be able to delete some keys | ||
// expected after mutations. | ||
wantDeploymentUnstructured := &unstructured.Unstructured{} | ||
wantDeploymentUnstructured.SetGroupVersionKind(schema.GroupVersionKind{ | ||
Group: "apps", | ||
Version: "v1", | ||
Kind: "Deployment", | ||
}) | ||
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// Unmarshal JSON into unstructured object. | ||
if err = json.Unmarshal(wantDeploymentJSON, wantDeploymentUnstructured); err != nil { | ||
t.Errorf("Error unmarshaling to unstructured: %v", err) | ||
} | ||
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// Remove the status and creationTimestamp fields to simulate what happen after mutations. | ||
unstructured.RemoveNestedField(wantDeploymentUnstructured.Object, "metadata", "creationTimestamp") | ||
unstructured.RemoveNestedField(wantDeploymentUnstructured.Object, "status") | ||
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// Marshal the unstructured object back to JSON. | ||
wantDeploymentJSON, err = json.Marshal(wantDeploymentUnstructured) | ||
if err != nil { | ||
fmt.Println("Error marshaling modified deployment:", err) | ||
return | ||
} | ||
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// Define the expected work object after mutations. | ||
wantWorkObj := &workv1alpha1.Work{ | ||
ObjectMeta: metav1.ObjectMeta{ | ||
Name: name, | ||
Namespace: namespace, | ||
Labels: map[string]string{ | ||
workv1alpha2.WorkPermanentIDLabel: "some-unique-id", | ||
}, | ||
}, | ||
Spec: workv1alpha1.WorkSpec{ | ||
Workload: workv1alpha1.WorkloadTemplate{ | ||
Manifests: []workv1alpha1.Manifest{ | ||
{ | ||
RawExtension: runtime.RawExtension{ | ||
Raw: wantDeploymentJSON, | ||
}, | ||
}, | ||
}, | ||
}, | ||
}, | ||
} | ||
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// Mock decoder that decodes the request into the work object. | ||
decoder := &fakeMutationDecoder{ | ||
obj: workObj, | ||
} | ||
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// Marshal the expected work object to simulate the final mutated object. | ||
wantBytes, err := json.Marshal(wantWorkObj) | ||
if err != nil { | ||
t.Fatalf("Failed to marshal expected work object: %v", err) | ||
} | ||
req.Object.Raw = wantBytes | ||
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// Instantiate the mutating handler. | ||
mutatingHandler := MutatingAdmission{ | ||
Decoder: decoder, | ||
} | ||
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// Call the Handle function. | ||
got := mutatingHandler.Handle(context.Background(), req) | ||
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// Check if exactly two patches are applied. | ||
if len(got.Patches) != 2 { | ||
t.Errorf("Handle() returned an unexpected number of patches. Expected 2 patches, received: %v", got.Patches) | ||
} | ||
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// Verify that the patches are for the UUID label. | ||
// If any other patches are present, it indicates that the work object was not handled as expected. | ||
for _, patch := range got.Patches { | ||
if patch.Operation != "replace" || | ||
(patch.Path != "/metadata/labels/work.karmada.io~1permanent-id" && | ||
patch.Path != "/spec/workload/manifests/0/metadata/labels/work.karmada.io~1permanent-id") { | ||
t.Errorf("Handle() returned unexpected patches. Only the two UUID patches were expected. Received patches: %v", got.Patches) | ||
} | ||
} | ||
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// Check if the admission request was allowed. | ||
if !got.Allowed { | ||
t.Errorf("Handle() got.Allowed = false, want true") | ||
} | ||
} |