return nil
		}
		return errors
	}
	return append(errors, err)
}

// AppendErrs appends newErrs to errors and returns the result.
// If newErrs is empty, nothing is appended.
func AppendErrs(errors []error, newErrs []error) Errors {
	if len(newErrs) == 0 {
		return errors
	}
	for _, e := range newErrs {
		errors = AppendErr(errors, e)
	}
	if len(errors) == 0 {
		return nil
	}
	return errors

	// ratcheting validation of x-kubernetes-list-type value map and set
	if newErrs := structurallisttype.ValidateListSetsAndMaps(nil, a.structuralSchema, uNew.Object); len(newErrs) > 0 {
		if oldErrs := structurallisttype.ValidateListSetsAndMaps(nil, a.structuralSchema, uOld.Object); len(oldErrs) == 0 {
			errs = append(errs, newErrs...)
		}
	}

	// validate x-kubernetes-validations rules

	if got, want := ToString(testErrs, defaultSeparator), wantStr; got != want {
		t.Errorf("got: %s, want: %s", got, want)
	}
}

func TestNewErrs(t *testing.T) {
	errs := NewErrs(nil)
	if errs != nil {
		t.Errorf("got: %s, want: nil", errs)
	}

	errs = NewErrs(fmt.Errorf("err1"))
	if got, want := errs.String(), "err1"; got != want {
		t.Errorf("got: %s, want: %s", got, want)
	}
}

func TestAppendErr(t *testing.T) {

	}
	if !util.IsPtr(structPtr) {
		metrics.CRValidationErrorTotal.Increment()
		return util.NewErrs(fmt.Errorf("validate path %s, value: %v, expected ptr, got %T", path, structPtr, structPtr))
	}
	structElems := reflect.ValueOf(structPtr).Elem()
	if !util.IsStruct(structElems) {
		metrics.CRValidationErrorTotal.Increment()
		return util.NewErrs(fmt.Errorf("validate path %s, value: %v, expected struct, got %T", path, structElems, structElems))
	}

	scope.Debugf("validatePortNumberString %v:", val)
	if !util.IsString(val) {
		return util.NewErrs(fmt.Errorf("validatePortNumberString(%s) bad type %T, want string", path, val))
	}
	if val.(string) == "*" || val.(string) == "" {
		return nil
	}
	intV, err := strconv.ParseInt(val.(string), 10, 32)
	if err != nil {
		return util.NewErrs(fmt.Errorf("%s : %s", path, err))
	}
	return validatePortNumber(path, intV)
}

	bo := make(map[any]any)
	by, err := base.YAML()
	if err != nil {
		return "", util.NewErrs(err)
	}
	// Use yaml2 specifically to allow interface{} as key which WritePathContext treats specially
	err = yaml2.Unmarshal(by, &bo)
	if err != nil {
		return "", util.NewErrs(err)
	}
	for _, p := range patches {
		v := p.Value.AsInterface()
		if strings.TrimSpace(p.Path) == "" {

	validators := []FeatureValidator{
		CheckServicePorts,
		CheckAutoScaleAndReplicaCount,
	}

	for _, validator := range validators {
		newErrs, newWarnings := validator(values, spec)
		errs = util.AppendErrs(errs, newErrs)
		warnings = append(warnings, newWarnings...)
	}

	return
}

// CheckAutoScaleAndReplicaCount warns when autoscaleEnabled is true and k8s replicaCount is set.

	return nil
}

// RenderManifest returns a manifest rendered against
func (i *IstioControlPlane) RenderManifest() (manifests name.ManifestMap, errsOut util.Errors) {
	if !i.started {
		return nil, util.NewErrs(fmt.Errorf("istioControlPlane must be Run before calling RenderManifest"))
	}

	manifests = make(name.ManifestMap)
	for _, c := range i.components {
		ms, err := c.RenderManifest()