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netif_test.go
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package nodecache
import (
"fmt"
"github.com/vishvananda/netlink"
"golang.org/x/sys/unix"
"net"
"testing"
)
type linkMock struct {
name string
Addrs []netlink.Addr
}
func newLinkMock(name string) *linkMock {
return &linkMock{
name: name,
Addrs: make([]netlink.Addr, 0),
}
}
func (l *linkMock) Attrs() *netlink.LinkAttrs {
return &netlink.LinkAttrs{
Name: l.name,
}
}
func (*linkMock) Type() string {
return ""
}
type nlMock struct {
ifs map[string]*linkMock
}
func newNlMock() *nlMock {
return &nlMock{ifs: make(map[string]*linkMock)}
}
func (n *nlMock) LinkByName(name string) (netlink.Link, error) {
if l, ok := n.ifs[name]; !ok {
return nil, fmt.Errorf("if %s not found", name)
} else {
return l, nil
}
}
func (n *nlMock) AddrList(nl netlink.Link, i int) ([]netlink.Addr, error) {
lMock := nl.(*linkMock)
return lMock.Addrs, nil
}
func (n *nlMock) LinkAdd(nl netlink.Link) error {
n.ifs[nl.Attrs().Name] = newLinkMock("nodecache")
return nil
}
func (n *nlMock) LinkDel(nl netlink.Link) error {
delete(n.ifs, nl.Attrs().Name)
return nil
}
func mockAddrAdder(nl netlink.Link, addr *netlink.Addr) error {
lMock := nl.(*linkMock)
lMock.Addrs = append(lMock.Addrs, *addr)
return nil
}
func TestEnsureDummyDevice(t *testing.T) {
nl := newNlMock()
ifName := "mockIf"
if _, err := EnsureDummyDevice(nl, ifName, []net.IP{net.IPv4(8, 8, 8, 8), net.IPv4(8, 8, 4, 4)}, mockAddrAdder); err != nil {
t.Errorf("Failed adding dummy device: %s", err)
}
l, err := nl.LinkByName(ifName)
if err != nil {
t.Errorf("Failed creating test interface")
}
addrs, err := nl.AddrList(l, unix.AF_INET)
if len(addrs) != 2 || err != nil {
t.Errorf("Failed assigning IP address to interface")
}
}
func TestEnsureDummyDeviceWithExistingIPs(t *testing.T) {
var err error
var alreadyExists bool
ifName := "mockIf"
nl := newNlMock()
_ = nl.LinkAdd(&netlink.Dummy{LinkAttrs: netlink.LinkAttrs{Name: ifName}})
l, _ := nl.LinkByName(ifName)
_ = mockAddrAdder(l, &netlink.Addr{IPNet: netlink.NewIPNet(net.IP{8, 8, 8, 8})})
if alreadyExists, err = EnsureDummyDevice(nl, ifName, []net.IP{net.IPv4(8, 8, 8, 8), net.IPv4(8, 8, 4, 4)}, mockAddrAdder); err != nil {
t.Errorf("Failed adding dummy device: %s", err)
}
if alreadyExists != true {
t.Errorf("Test interface should already exist")
}
addrs, err := nl.AddrList(l, unix.AF_INET)
if len(addrs) != 2 || err != nil {
t.Errorf("Failed assigning IP address to interface")
}
}