AdGuardHome/internal/aghnet/arpdb_test.go

217 lines
4.6 KiB
Go

package aghnet
import (
"net"
"sync"
"testing"
"github.com/AdguardTeam/golibs/errors"
"github.com/AdguardTeam/golibs/testutil"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestNewARPDB(t *testing.T) {
var a ARPDB
require.NotPanics(t, func() { a = NewARPDB() })
assert.NotNil(t, a)
}
// TestARPDB is the mock implementation of ARPDB to use in tests.
type TestARPDB struct {
OnRefresh func() (err error)
OnNeighbors func() (ns []Neighbor)
}
// Refresh implements the ARPDB interface for *TestARPDB.
func (arp *TestARPDB) Refresh() (err error) {
return arp.OnRefresh()
}
// Neighbors implements the ARPDB interface for *TestARPDB.
func (arp *TestARPDB) Neighbors() (ns []Neighbor) {
return arp.OnNeighbors()
}
func TestARPDBS(t *testing.T) {
knownIP := net.IP{1, 2, 3, 4}
knownMAC := net.HardwareAddr{0xAB, 0xCD, 0xEF, 0xAB, 0xCD, 0xEF}
succRefrCount, failRefrCount := 0, 0
clnp := func() {
succRefrCount, failRefrCount = 0, 0
}
succDB := &TestARPDB{
OnRefresh: func() (err error) { succRefrCount++; return nil },
OnNeighbors: func() (ns []Neighbor) {
return []Neighbor{{Name: "abc", IP: knownIP, MAC: knownMAC}}
},
}
failDB := &TestARPDB{
OnRefresh: func() (err error) { failRefrCount++; return errors.Error("refresh failed") },
OnNeighbors: func() (ns []Neighbor) { return nil },
}
t.Run("begin_with_success", func(t *testing.T) {
t.Cleanup(clnp)
a := newARPDBs(succDB, failDB)
err := a.Refresh()
require.NoError(t, err)
assert.Equal(t, 1, succRefrCount)
assert.Zero(t, failRefrCount)
assert.NotEmpty(t, a.Neighbors())
})
t.Run("begin_with_fail", func(t *testing.T) {
t.Cleanup(clnp)
a := newARPDBs(failDB, succDB)
err := a.Refresh()
require.NoError(t, err)
assert.Equal(t, 1, succRefrCount)
assert.Equal(t, 1, failRefrCount)
assert.NotEmpty(t, a.Neighbors())
})
t.Run("fail_only", func(t *testing.T) {
t.Cleanup(clnp)
wantMsg := `each arpdb failed: 2 errors: "refresh failed", "refresh failed"`
a := newARPDBs(failDB, failDB)
err := a.Refresh()
require.Error(t, err)
testutil.AssertErrorMsg(t, wantMsg, err)
assert.Equal(t, 2, failRefrCount)
assert.Empty(t, a.Neighbors())
})
t.Run("fail_after_success", func(t *testing.T) {
t.Cleanup(clnp)
shouldFail := false
unstableDB := &TestARPDB{
OnRefresh: func() (err error) {
if shouldFail {
err = errors.Error("unstable failed")
}
shouldFail = !shouldFail
return err
},
OnNeighbors: func() (ns []Neighbor) {
if !shouldFail {
return failDB.OnNeighbors()
}
return succDB.OnNeighbors()
},
}
a := newARPDBs(unstableDB, succDB)
// Unstable ARPDB should refresh successfully.
err := a.Refresh()
require.NoError(t, err)
assert.Zero(t, succRefrCount)
assert.NotEmpty(t, a.Neighbors())
// Unstable ARPDB should fail and the succDB should be used.
err = a.Refresh()
require.NoError(t, err)
assert.Equal(t, 1, succRefrCount)
assert.NotEmpty(t, a.Neighbors())
// Unstable ARPDB should refresh successfully again.
err = a.Refresh()
require.NoError(t, err)
assert.Equal(t, 1, succRefrCount)
assert.NotEmpty(t, a.Neighbors())
})
t.Run("empty", func(t *testing.T) {
a := newARPDBs()
require.NoError(t, a.Refresh())
assert.Empty(t, a.Neighbors())
})
}
func TestCmdARPDB_arpa(t *testing.T) {
a := &cmdARPDB{
cmd: "cmd",
parse: parseArpA,
ns: &neighs{
mu: &sync.RWMutex{},
ns: make([]Neighbor, 0),
},
}
t.Run("arp_a", func(t *testing.T) {
sh := theOnlyCmd("cmd", 0, arpAOutput, nil)
substShell(t, sh.RunCmd)
err := a.Refresh()
require.NoError(t, err)
assert.Equal(t, wantNeighs, a.Neighbors())
})
t.Run("runcmd_error", func(t *testing.T) {
sh := theOnlyCmd("cmd", 0, "", errors.Error("can't run"))
substShell(t, sh.RunCmd)
err := a.Refresh()
testutil.AssertErrorMsg(t, "cmd arpdb: running command: can't run", err)
})
t.Run("bad_code", func(t *testing.T) {
sh := theOnlyCmd("cmd", 1, "", nil)
substShell(t, sh.RunCmd)
err := a.Refresh()
testutil.AssertErrorMsg(t, "cmd arpdb: running command: unexpected exit code 1", err)
})
t.Run("empty", func(t *testing.T) {
sh := theOnlyCmd("cmd", 0, "", nil)
substShell(t, sh.RunCmd)
err := a.Refresh()
require.NoError(t, err)
assert.Empty(t, a.Neighbors())
})
}
func TestEmptyARPDB(t *testing.T) {
a := EmptyARPDB{}
t.Run("refresh", func(t *testing.T) {
var err error
require.NotPanics(t, func() {
err = a.Refresh()
})
assert.NoError(t, err)
})
t.Run("neighbors", func(t *testing.T) {
var ns []Neighbor
require.NotPanics(t, func() {
ns = a.Neighbors()
})
assert.Empty(t, ns)
})
}