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net: don't import bytes or fmt in mac.go

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Also add some more MAC tests.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5728065
This commit is contained in:
Brad Fitzpatrick 2012-03-05 11:43:28 -08:00
parent eb5db57d1a
commit 82a9294d1b
2 changed files with 25 additions and 11 deletions
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20
src/pkg/net/mac.go
View File

@ -6,24 +6,26 @@
package net
import (
"bytes"
"errors"
"fmt"
)
import "errors"
const hexDigit = "0123456789abcdef"
// A HardwareAddr represents a physical hardware address.
type HardwareAddr []byte
func (a HardwareAddr) String() string {
var buf bytes.Buffer
if len(a) == 0 {
return ""
}
buf := make([]byte, 0, len(a)*3-1)
for i, b := range a {
if i > 0 {
buf.WriteByte(':')
buf = append(buf, ':')
}
fmt.Fprintf(&buf, "%02x", b)
buf = append(buf, hexDigit[b>>4])
buf = append(buf, hexDigit[b&0xF])
}
return buf.String()
return string(buf)
}
// ParseMAC parses s as an IEEE 802 MAC-48, EUI-48, or EUI-64 using one of the

16
src/pkg/net/mac_test.go
View File

@ -43,12 +43,24 @@ func match(err error, s string) bool {
return err != nil && strings.Contains(err.Error(), s)
}
func TestParseMAC(t *testing.T) {
for _, tt := range mactests {
func TestMACParseString(t *testing.T) {
for i, tt := range mactests {
out, err := ParseMAC(tt.in)
if !reflect.DeepEqual(out, tt.out) || !match(err, tt.err) {
t.Errorf("ParseMAC(%q) = %v, %v, want %v, %v", tt.in, out, err, tt.out,
tt.err)
}
if tt.err == "" {
// Verify that serialization works too, and that it round-trips.
s := out.String()
out2, err := ParseMAC(s)
if err != nil {
t.Errorf("%d. ParseMAC(%q) = %v", i, s, err)
continue
}
if !reflect.DeepEqual(out2, out) {
t.Errorf("%d. ParseMAC(%q) = %v, want %v", i, s, out2, out)
}
}
}
}