package p2p import ( "regexp" "testing" ) func TestExternalIPv4(t *testing.T) { // Regular expression format for IPv4 IPv4Format := `\.\d{1,3}\.\d{1,3}\b` test, err := ExternalIPv4() if err != nil { t.Errorf("Test check external ipv4 failed with %v", err) } valid := regexp.MustCompile(IPv4Format) if !valid.MatchString(test) { t.Errorf("Wanted: %v, got: %v", IPv4Format, test) } }