Add mac validator

baked_in.go

@@ -68,6 +68,12 @@ var BakedInValidators = map[string]Func{
 	"ipv4":         isIPv4,
 	"ipv6":         isIPv6,
 	"ip":           isIP,
+	"mac":          isMac,
+}
+
+func isMac(topStruct reflect.Value, currentStruct reflect.Value, field reflect.Value, fieldType reflect.Type, fieldKind reflect.Kind, param string) bool {
+	_, err := net.ParseMAC(field.String())
+	return err == nil
 }
 
 func isIPv4(topStruct reflect.Value, currentStruct reflect.Value, field reflect.Value, fieldType reflect.Type, fieldKind reflect.Kind, param string) bool {

doc.go

@@ -384,6 +384,12 @@ Here is a list of the current built in validators:
 		This validates that a string value contains a valid v6 IP Adress.
 		(Usage: ipv6)
 
+	mac
+		This validates that a string value contains a valid MAC Adress defined
+		by go's ParseMAC accepted formats and types see:
+		http://golang.org/src/net/mac.go?s=866:918#L29
+		(Usage: mac)
+
 Validator notes:
 
 	regex

validator_test.go

@@ -119,6 +119,41 @@ func AssertError(t *testing.T, errs ValidationErrors, key, field, expectedTag st
 	EqualSkip(t, 2, val.Tag, expectedTag)
 }
 
+func TestMACValidation(t *testing.T) {
+	tests := []struct {
+		param    string
+		expected bool
+	}{
+		{"3D:F2:C9:A6:B3:4F", true},
+		{"3D-F2-C9-A6-B3:4F", false},
+		{"123", false},
+		{"", false},
+		{"abacaba", false},
+		{"00:25:96:FF:FE:12:34:56", true},
+		{"0025:96FF:FE12:3456", false},
+	}
+
+	for i, test := range tests {
+
+		errs := validate.Field(test.param, "mac")
+
+		if test.expected == true {
+			if !IsEqual(errs, nil) {
+				t.Fatalf("Index: %d mac failed Error: %s", i, errs)
+			}
+		} else {
+			if IsEqual(errs, nil) {
+				t.Fatalf("Index: %d mac failed Error: %s", i, errs)
+			} else {
+				val := errs[""]
+				if val.Tag != "mac" {
+					t.Fatalf("Index: %d mac failed Error: %s", i, errs)
+				}
+			}
+		}
+	}
+}
+
 func TestIPValidation(t *testing.T) {
 	tests := []struct {
 		param    string