Make the debug string function public, so that the pxe package can use it.

dhcp/dhcp.go

@@ -69,7 +69,8 @@ type Packet struct {
 	Options Options
 }
 
-func (p *Packet) testString() string {
+// DebugString prints the contents of a DHCP packet for human consumption.
+func (p *Packet) DebugString() string {
 	var b bytes.Buffer
 	bcast := "Unicast"
 	if p.Broadcast {

dhcp/dhcp_test.go

@@ -54,7 +54,7 @@ func TestParse(t *testing.T) {
 		if err != nil {
 			t.Fatalf("Parsing DHCP packet #%d: %s", i+1, err)
 		}
-		pkts.WriteString(pkt.testString())
+		pkts.WriteString(pkt.DebugString())
 		pkts.WriteString("======\n")
 	}