chore: improve cli version command and add tests (#8336)

Signed-off-by: Charles-Edouard Brétéché <charles.edouard@nirmata.com>

cmd/cli/kubectl-kyverno/commands/version/command.go

@@ -14,6 +14,7 @@ func Command() *cobra.Command {
 		Short:   command.FormatDescription(true, websiteUrl, false, description...),
 		Long:    command.FormatDescription(false, websiteUrl, false, description...),
 		Example: command.FormatExamples(examples...),
+		Args:    cobra.NoArgs,
 		RunE: func(cmd *cobra.Command, args []string) error {
 			fmt.Printf("Version: %s\n", version.Version())
 			fmt.Printf("Time: %s\n", version.Time())

cmd/cli/kubectl-kyverno/commands/version/command_test.go

@@ -0,0 +1,20 @@
+package version
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCommand(t *testing.T) {
+	cmd := Command()
+	err := cmd.Execute()
+	assert.NoError(t, err)
+}
+
+func TestCommandWithArgs(t *testing.T) {
+	cmd := Command()
+	cmd.SetArgs([]string{"test"})
+	err := cmd.Execute()
+	assert.Error(t, err)
+}