Added tests for remediation controller

Signed-off-by: Anuj Agrawal <anujagrawal380@gmail.com>

pkg/controllers/remediation/remedy_controller_test.go

@@ -0,0 +1,207 @@
+/*
+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.
+*/
+
+package remediation
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/client-go/rest"
+	controllerruntime "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/client/fake"
+	"sigs.k8s.io/controller-runtime/pkg/reconcile"
+
+	clusterv1alpha1 "github.com/karmada-io/karmada/pkg/apis/cluster/v1alpha1"
+	remedyv1alpha1 "github.com/karmada-io/karmada/pkg/apis/remedy/v1alpha1"
+)
+
+func TestReconcile(t *testing.T) {
+	tests := []struct {
+		name            string
+		existingObjs    []runtime.Object
+		inputCluster    *clusterv1alpha1.Cluster
+		expectedError   bool
+		expectedActions []string
+		expectedRequeue bool
+	}{
+		{
+			name:         "Cluster not found",
+			existingObjs: []runtime.Object{},
+			inputCluster: &clusterv1alpha1.Cluster{
+				ObjectMeta: metav1.ObjectMeta{
+					Name: "non-existent-cluster",
+				},
+			},
+			expectedError:   false,
+			expectedActions: nil,
+			expectedRequeue: false,
+		},
+		{
+			name: "Cluster with no matching remedies",
+			existingObjs: []runtime.Object{
+				&clusterv1alpha1.Cluster{
+					ObjectMeta: metav1.ObjectMeta{
+						Name: "test-cluster",
+					},
+					Status: clusterv1alpha1.ClusterStatus{
+						Conditions: []metav1.Condition{
+							{
+								Type:   clusterv1alpha1.ClusterConditionReady,
+								Status: metav1.ConditionTrue,
+							},
+						},
+					},
+				},
+			},
+			inputCluster: &clusterv1alpha1.Cluster{
+				ObjectMeta: metav1.ObjectMeta{
+					Name: "test-cluster",
+				},
+			},
+			expectedError:   false,
+			expectedActions: nil,
+			expectedRequeue: false,
+		},
+		{
+			name: "Cluster being deleted",
+			existingObjs: []runtime.Object{
+				&clusterv1alpha1.Cluster{
+					ObjectMeta: metav1.ObjectMeta{
+						Name:              "deleting-cluster",
+						DeletionTimestamp: &metav1.Time{Time: time.Now()},
+						Finalizers:        []string{"test-finalizer"},
+					},
+				},
+			},
+			inputCluster: &clusterv1alpha1.Cluster{
+				ObjectMeta: metav1.ObjectMeta{
+					Name: "deleting-cluster",
+				},
+			},
+			expectedError:   false,
+			expectedActions: nil,
+			expectedRequeue: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			scheme := setupScheme()
+			fakeClient := createFakeClient(scheme, tt.existingObjs...)
+			controller := &RemedyController{Client: fakeClient}
+
+			req := reconcile.Request{
+				NamespacedName: types.NamespacedName{Name: tt.inputCluster.Name},
+			}
+			result, err := controller.Reconcile(context.Background(), req)
+
+			if tt.expectedError {
+				assert.Error(t, err)
+			} else {
+				assert.NoError(t, err)
+			}
+
+			// Assert requeue result
+			assert.Equal(t, tt.expectedRequeue, result.Requeue, "Unexpected requeue result")
+
+			// Assert remedy actions if expected
+			if tt.expectedActions != nil {
+				updatedCluster := &clusterv1alpha1.Cluster{}
+				err := fakeClient.Get(context.Background(), req.NamespacedName, updatedCluster)
+				assert.NoError(t, err, "Failed to get updated cluster")
+				assert.Equal(t, tt.expectedActions, updatedCluster.Status.RemedyActions, "Unexpected remedy actions")
+			}
+		})
+	}
+}
+
+func TestSetupWithManager(t *testing.T) {
+	scheme := setupScheme()
+	tests := []struct {
+		name            string
+		controllerSetup func() *RemedyController
+	}{
+		{
+			name: "setup with valid client",
+			controllerSetup: func() *RemedyController {
+				return &RemedyController{Client: createFakeClient(scheme)}
+			},
+		},
+		{
+			name: "setup with nil client",
+			controllerSetup: func() *RemedyController {
+				return &RemedyController{Client: nil}
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			mgr, err := setupManager(scheme)
+			require.NoError(t, err)
+
+			controller := tt.controllerSetup()
+			err = controller.SetupWithManager(mgr)
+
+			assert.NoError(t, err)
+		})
+	}
+}
+
+func TestSetupWatches(t *testing.T) {
+	scheme := setupScheme()
+
+	mgr, err := setupManager(scheme)
+	require.NoError(t, err)
+
+	controller := &RemedyController{Client: mgr.GetClient()}
+
+	remedyController, err := controllerruntime.NewControllerManagedBy(mgr).
+		For(&clusterv1alpha1.Cluster{}).
+		Build(controller)
+	require.NoError(t, err)
+
+	err = controller.setupWatches(remedyController, mgr)
+	assert.NoError(t, err)
+}
+
+// Helper Functions
+
+// Helper function to set up the scheme
+func setupScheme() *runtime.Scheme {
+	scheme := runtime.NewScheme()
+	_ = clusterv1alpha1.Install(scheme)
+	_ = remedyv1alpha1.Install(scheme)
+	return scheme
+}
+
+// Helper function to create a fake client
+func createFakeClient(scheme *runtime.Scheme, objs ...runtime.Object) client.Client {
+	return fake.NewClientBuilder().WithScheme(scheme).WithRuntimeObjects(objs...).Build()
+}
+
+// Helper function to set up the manager
+func setupManager(scheme *runtime.Scheme) (controllerruntime.Manager, error) {
+	return controllerruntime.NewManager(&rest.Config{}, controllerruntime.Options{Scheme: scheme})
+}