Improving Mac discovery

internal/clientinfo/arp_test.go

@@ -0,0 +1,23 @@
+package clientinfo
+
+import (
+	"sync"
+	"testing"
+)
+
+func TestArpScan(t *testing.T) {
+	a := &arpDiscover{}
+	a.scan()
+
+	for _, table := range []*sync.Map{&a.mac, &a.ip} {
+		count := 0
+		table.Range(func(key, value any) bool {
+			count++
+			t.Logf("%s => %s", key, value)
+			return true
+		})
+		if count == 0 {
+			t.Error("empty result from arp scan")
+		}
+	}
+}