frontend: skip network related tests when unavailable

Fix #46

frontend/bgpmap_test.go

@@ -6,6 +6,8 @@ import (
 )
 
 func TestGetASNRepresentationDNS(t *testing.T) {
+	checkNetwork(t)
+
 	setting.dnsInterface = "asn.cymru.com"
 	setting.whoisServer = ""
 	result := getASNRepresentation("6939")
@@ -15,6 +17,8 @@ func TestGetASNRepresentationDNS(t *testing.T) {
 }
 
 func TestGetASNRepresentationWhois(t *testing.T) {
+	checkNetwork(t)
+
 	setting.dnsInterface = ""
 	setting.whoisServer = "whois.arin.net"
 	result := getASNRepresentation("6939")

frontend/network_test.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"net"
+	"testing"
+	"time"
+)
+
+const (
+	NETWORK_UNKNOWN = 0
+	NETWORK_DOWN = 1
+	NETWORK_UP = 2
+)
+
+var networkState int = NETWORK_UNKNOWN
+func checkNetwork(t *testing.T) {
+	if networkState == NETWORK_UNKNOWN {
+		conn, err := net.DialTimeout("tcp", "8.8.8.8:53", 1*time.Second)
+		if err != nil {
+			networkState = NETWORK_DOWN
+		} else {
+			networkState = NETWORK_UP
+			conn.Close()
+		}
+	}
+
+	if networkState == NETWORK_DOWN {
+		t.Skipf("Test skipped for network error")
+	}
+}

frontend/whois_test.go

@@ -6,6 +6,8 @@ import (
 )
 
 func TestWhois(t *testing.T) {
+	checkNetwork(t)
+
 	setting.whoisServer = "whois.arin.net"
 	result := whois("AS6939")
 	if !strings.Contains(result, "HURRICANE") {