Fix/1481 skip invalid type validations (#1498)

#1481 

Only strings can pass validations for strings other types return error
in 'ascii' & 'printascii' validations.

Author: KaranLathiya

baked_in.go

@@ -534,12 +534,20 @@ func hasMultiByteCharacter(fl FieldLevel) bool {
 
 // isPrintableASCII is the validation function for validating if the field's value is a valid printable ASCII character.
 func isPrintableASCII(fl FieldLevel) bool {
-	return printableASCIIRegex().MatchString(fl.Field().String())
+	field := fl.Field()
+	if field.Kind() == reflect.String {
+		return printableASCIIRegex().MatchString(field.String())
+	}
+	return false
 }
 
 // isASCII is the validation function for validating if the field's value is a valid ASCII character.
 func isASCII(fl FieldLevel) bool {
-	return aSCIIRegex().MatchString(fl.Field().String())
+	field := fl.Field()
+	if field.Kind() == reflect.String {
+		return aSCIIRegex().MatchString(field.String())
+	}
+	return false
 }
 
 // isUUID5 is the validation function for validating if the field's value is a valid v5 UUID.

validator_test.go

@@ -3904,7 +3904,7 @@ func TestMultibyteValidation(t *testing.T) {
 
 func TestPrintableASCIIValidation(t *testing.T) {
 	tests := []struct {
-		param    string
+		param    interface{}
 		expected bool
 	}{
 		{"", true},
@@ -3918,6 +3918,8 @@ func TestPrintableASCIIValidation(t *testing.T) {
 		{"1234abcDEF", true},
 		{"newline\n", false},
 		{"\x19test\x7F", false},
+		{[]int{3000}, false},
+		{1, false},
 	}
 
 	validate := New()
@@ -3944,7 +3946,7 @@ func TestPrintableASCIIValidation(t *testing.T) {
 
 func TestASCIIValidation(t *testing.T) {
 	tests := []struct {
-		param    string
+		param    interface{}
 		expected bool
 	}{
 		{"", true},
@@ -3957,6 +3959,8 @@ func TestASCIIValidation(t *testing.T) {
 		{"[email protected]", true},
 		{"1234abcDEF", true},
 		{"", true},
+		{[]int{3000}, false},
+		{1, false},
 	}
 
 	validate := New()