pkg/karmadactl: unit test exec

In this commit, we unit test exec on validating the execute options
on control plane and member clusters.

Signed-off-by: Mohamed Awnallah <mohamedmohey2352@gmail.com>

pkg/karmadactl/exec/exec.go

@@ -17,6 +17,7 @@ limitations under the License.
 package exec
 
 import (
+	"errors"
 	"fmt"
 	"time"
 
@@ -151,7 +152,7 @@ func (o *CommandExecOptions) Validate() error {
 		return err
 	}
 	if o.OperationScope == options.Members && len(o.Cluster) == 0 {
-		return fmt.Errorf("must specify a member cluster")
+		return errors.New("must specify a member cluster")
 	}
 	return o.KubectlExecOptions.Validate()
 }

pkg/karmadactl/exec/exec_test.go

@@ -0,0 +1,79 @@
+/*
+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 exec
+
+import (
+	"bytes"
+	"strings"
+	"testing"
+
+	"k8s.io/cli-runtime/pkg/genericiooptions"
+	"k8s.io/cli-runtime/pkg/resource"
+	kubectlexec "k8s.io/kubectl/pkg/cmd/exec"
+
+	"github.com/karmada-io/karmada/pkg/karmadactl/options"
+)
+
+func TestValidateExecute(t *testing.T) {
+	tests := []struct {
+		name     string
+		execOpts *CommandExecOptions
+		wantErr  bool
+		errMsg   string
+	}{
+		{
+			name:     "Validate_WithMemberOperationScopeAndWithoutMemberCluster_MemberClusterOptMustBeSpecified",
+			execOpts: &CommandExecOptions{OperationScope: options.Members},
+			wantErr:  true,
+			errMsg:   "must specify a member cluster",
+		},
+		{
+			name: "Validate_WithMemberOperationScopeAndWithMemberCluster_Validated",
+			execOpts: &CommandExecOptions{
+				OperationScope: options.Members,
+				Cluster:        "test-cluster",
+				KubectlExecOptions: &kubectlexec.ExecOptions{
+					FilenameOptions: resource.FilenameOptions{},
+					ResourceName:    "test-pod",
+					Command:         []string{"date"},
+					StreamOptions: kubectlexec.StreamOptions{
+						IOStreams: genericiooptions.IOStreams{
+							Out:    &bytes.Buffer{},
+							ErrOut: &bytes.Buffer{},
+						},
+					},
+				},
+			},
+
+			wantErr: false,
+		},
+	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			err := test.execOpts.Validate()
+			if err == nil && test.wantErr {
+				t.Fatal("expected an error, but got none")
+			}
+			if err != nil && !test.wantErr {
+				t.Errorf("unexpected error, got: %v", err)
+			}
+			if err != nil && test.wantErr && !strings.Contains(err.Error(), test.errMsg) {
+				t.Errorf("expected error message %s to be in %s", test.errMsg, err.Error())
+			}
+		})
+	}
+}