253 lines
6.0 KiB
Go
253 lines
6.0 KiB
Go
package aghnet
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import (
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"fmt"
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"io/fs"
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"net"
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"os"
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"strings"
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"testing"
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"github.com/AdguardTeam/AdGuardHome/internal/aghtest"
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"github.com/AdguardTeam/golibs/errors"
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"github.com/AdguardTeam/golibs/netutil"
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"github.com/AdguardTeam/golibs/testutil"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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func TestMain(m *testing.M) {
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aghtest.DiscardLogOutput(m)
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}
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// testdata is the filesystem containing data for testing the package.
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var testdata fs.FS = os.DirFS("./testdata")
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// substRootDirFS replaces the aghos.RootDirFS function used throughout the
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// package with fsys for tests ran under t.
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func substRootDirFS(t testing.TB, fsys fs.FS) {
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t.Helper()
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prev := rootDirFS
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t.Cleanup(func() { rootDirFS = prev })
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rootDirFS = fsys
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}
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// RunCmdFunc is the signature of aghos.RunCommand function.
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type RunCmdFunc func(cmd string, args ...string) (code int, out []byte, err error)
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// substShell replaces the the aghos.RunCommand function used throughout the
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// package with rc for tests ran under t.
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func substShell(t testing.TB, rc RunCmdFunc) {
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t.Helper()
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prev := aghosRunCommand
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t.Cleanup(func() { aghosRunCommand = prev })
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aghosRunCommand = rc
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}
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// mapShell is a substitution of aghos.RunCommand that maps the command to it's
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// execution result. It's only needed to simplify testing.
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//
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// TODO(e.burkov): Perhaps put all the shell interactions behind an interface.
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type mapShell map[string]struct {
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err error
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out string
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code int
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}
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// theOnlyCmd returns s that only handles a single command and arguments
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// combination from cmd.
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func theOnlyCmd(cmd string, code int, out string, err error) (s mapShell) {
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return mapShell{cmd: {code: code, out: out, err: err}}
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}
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// RunCmd is a RunCmdFunc handled by s.
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func (s mapShell) RunCmd(cmd string, args ...string) (code int, out []byte, err error) {
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key := strings.Join(append([]string{cmd}, args...), " ")
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ret, ok := s[key]
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if !ok {
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return 0, nil, fmt.Errorf("unexpected shell command %q", key)
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}
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return ret.code, []byte(ret.out), ret.err
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}
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func TestGatewayIP(t *testing.T) {
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testCases := []struct {
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name string
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shell mapShell
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want net.IP
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}{{
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name: "success_v4",
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shell: theOnlyCmd("ip route show dev ifaceName", 0, `default via 1.2.3.4 onlink`, nil),
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want: net.IP{1, 2, 3, 4}.To16(),
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}, {
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name: "success_v6",
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shell: theOnlyCmd("ip route show dev ifaceName", 0, `default via ::ffff onlink`, nil),
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want: net.IP{
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0x0, 0x0, 0x0, 0x0,
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0x0, 0x0, 0x0, 0x0,
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0x0, 0x0, 0x0, 0x0,
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0x0, 0x0, 0xFF, 0xFF,
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},
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}, {
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name: "bad_output",
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shell: theOnlyCmd("ip route show dev ifaceName", 0, `non-default via 1.2.3.4 onlink`, nil),
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want: nil,
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}, {
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name: "err_runcmd",
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shell: theOnlyCmd("ip route show dev ifaceName", 0, "", errors.Error("can't run command")),
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want: nil,
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}, {
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name: "bad_code",
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shell: theOnlyCmd("ip route show dev ifaceName", 1, "", nil),
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want: nil,
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}}
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for _, tc := range testCases {
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t.Run(tc.name, func(t *testing.T) {
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substShell(t, tc.shell.RunCmd)
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assert.Equal(t, tc.want, GatewayIP("ifaceName"))
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})
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}
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}
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func TestGetInterfaceByIP(t *testing.T) {
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ifaces, err := GetValidNetInterfacesForWeb()
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require.NoError(t, err)
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require.NotEmpty(t, ifaces)
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for _, iface := range ifaces {
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t.Run(iface.Name, func(t *testing.T) {
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require.NotEmpty(t, iface.Addresses)
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for _, ip := range iface.Addresses {
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ifaceName := GetInterfaceByIP(ip)
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require.Equal(t, iface.Name, ifaceName)
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}
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})
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}
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}
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func TestBroadcastFromIPNet(t *testing.T) {
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known6 := net.IP{
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1, 2, 3, 4,
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5, 6, 7, 8,
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9, 10, 11, 12,
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13, 14, 15, 16,
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}
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testCases := []struct {
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name string
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subnet *net.IPNet
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want net.IP
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}{{
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name: "full",
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subnet: &net.IPNet{
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IP: net.IP{192, 168, 0, 1},
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Mask: net.IPMask{255, 255, 15, 0},
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},
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want: net.IP{192, 168, 240, 255},
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}, {
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name: "ipv6_no_mask",
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subnet: &net.IPNet{
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IP: known6,
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},
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want: known6,
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}, {
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name: "ipv4_no_mask",
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subnet: &net.IPNet{
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IP: net.IP{192, 168, 1, 2},
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},
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want: net.IP{192, 168, 1, 255},
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}, {
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name: "unspecified",
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subnet: &net.IPNet{
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IP: net.IP{0, 0, 0, 0},
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Mask: net.IPMask{0, 0, 0, 0},
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},
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want: net.IPv4bcast,
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}}
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for _, tc := range testCases {
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t.Run(tc.name, func(t *testing.T) {
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bc := BroadcastFromIPNet(tc.subnet)
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assert.True(t, bc.Equal(tc.want), bc)
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})
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}
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}
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func TestCheckPort(t *testing.T) {
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t.Run("tcp_bound", func(t *testing.T) {
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l, err := net.Listen("tcp", "127.0.0.1:")
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require.NoError(t, err)
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testutil.CleanupAndRequireSuccess(t, l.Close)
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ipp := netutil.IPPortFromAddr(l.Addr())
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require.NotNil(t, ipp)
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require.NotNil(t, ipp.IP)
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require.NotZero(t, ipp.Port)
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err = CheckPort("tcp", ipp.IP, ipp.Port)
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target := &net.OpError{}
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require.ErrorAs(t, err, &target)
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assert.Equal(t, "listen", target.Op)
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})
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t.Run("udp_bound", func(t *testing.T) {
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conn, err := net.ListenPacket("udp", "127.0.0.1:")
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require.NoError(t, err)
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testutil.CleanupAndRequireSuccess(t, conn.Close)
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ipp := netutil.IPPortFromAddr(conn.LocalAddr())
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require.NotNil(t, ipp)
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require.NotNil(t, ipp.IP)
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require.NotZero(t, ipp.Port)
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err = CheckPort("udp", ipp.IP, ipp.Port)
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target := &net.OpError{}
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require.ErrorAs(t, err, &target)
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assert.Equal(t, "listen", target.Op)
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})
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t.Run("bad_network", func(t *testing.T) {
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err := CheckPort("bad_network", nil, 0)
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assert.NoError(t, err)
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})
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t.Run("can_bind", func(t *testing.T) {
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err := CheckPort("udp", net.IP{0, 0, 0, 0}, 0)
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assert.NoError(t, err)
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})
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}
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func TestCollectAllIfacesAddrs(t *testing.T) {
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t.Skip("TODO(e.burkov): Substitute the net.Interfaces.")
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addrs, err := CollectAllIfacesAddrs()
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require.NoError(t, err)
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assert.NotEmpty(t, addrs)
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}
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func TestIsAddrInUse(t *testing.T) {
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t.Run("addr_in_use", func(t *testing.T) {
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l, err := net.Listen("tcp", "0.0.0.0:0")
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require.NoError(t, err)
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testutil.CleanupAndRequireSuccess(t, l.Close)
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_, err = net.Listen(l.Addr().Network(), l.Addr().String())
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assert.True(t, IsAddrInUse(err))
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})
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t.Run("another", func(t *testing.T) {
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const anotherErr errors.Error = "not addr in use"
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assert.False(t, IsAddrInUse(anotherErr))
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})
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}
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