Add test for cleanupServiceDiscovery

Unit test for the cleanupServiceDiscovery,
follow up of PR: #1985

Signed-off-by: Flavio Crisciani <flavio.crisciani@docker.com>

libnetwork/service_common_test.go

@@ -0,0 +1,45 @@
+package libnetwork
+
+import (
+	"net"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestCleanupServiceDiscovery(t *testing.T) {
+	c, err := New()
+	require.NoError(t, err)
+	defer c.Stop()
+
+	n1, err := c.NewNetwork("bridge", "net1", "", nil)
+	require.NoError(t, err)
+	defer n1.Delete()
+
+	n2, err := c.NewNetwork("bridge", "net2", "", nil)
+	require.NoError(t, err)
+	defer n2.Delete()
+
+	n1.(*network).addSvcRecords("N1ep1", "service_test", "serviceID1", net.ParseIP("192.168.0.1"), net.IP{}, true, "test")
+	n1.(*network).addSvcRecords("N2ep2", "service_test", "serviceID2", net.ParseIP("192.168.0.2"), net.IP{}, true, "test")
+
+	n2.(*network).addSvcRecords("N2ep1", "service_test", "serviceID1", net.ParseIP("192.168.1.1"), net.IP{}, true, "test")
+	n2.(*network).addSvcRecords("N2ep2", "service_test", "serviceID2", net.ParseIP("192.168.1.2"), net.IP{}, true, "test")
+
+	if len(c.(*controller).svcRecords) != 2 {
+		t.Fatalf("Service record not added correctly:%v", c.(*controller).svcRecords)
+	}
+
+	// cleanup net1
+	c.(*controller).cleanupServiceDiscovery(n1.ID())
+
+	if len(c.(*controller).svcRecords) != 1 {
+		t.Fatalf("Service record not cleaned correctly:%v", c.(*controller).svcRecords)
+	}
+
+	c.(*controller).cleanupServiceDiscovery("")
+
+	if len(c.(*controller).svcRecords) != 0 {
+		t.Fatalf("Service record not cleaned correctly:%v", c.(*controller).svcRecords)
+	}
+}