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service.go
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service.go
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package inet256test
import (
"context"
"math/rand"
"testing"
"time"
"github.com/brendoncarroll/go-p2p/p2ptest"
"github.com/stretchr/testify/require"
"golang.org/x/sync/errgroup"
"github.com/inet256/inet256/pkg/inet256"
)
var ctx = context.Background()
func TestService(t *testing.T, sf func(testing.TB, []inet256.Service)) {
t.Run("Send", func(t *testing.T) {
xs := make([]inet256.Service, 1)
sf(t, xs)
testServerSend(t, xs[0])
})
t.Run("SendMultiple", func(t *testing.T) {
xs := make([]inet256.Service, 2)
sf(t, xs)
testMultipleServers(t, xs...)
})
t.Run("TestLoopback", func(t *testing.T) {
xs := make([]inet256.Service, 2)
sf(t, xs)
n1 := OpenNode(t, xs[0], 1)
n2 := OpenNode(t, xs[1], 2)
TestSendRecvOne(t, n1, n1)
TestSendRecvOne(t, n2, n2)
})
t.Run("MTU", func(t *testing.T) {
xs := make([]inet256.Service, 2)
sf(t, xs)
n1 := OpenNode(t, xs[0], 1)
n2 := OpenNode(t, xs[1], 2)
ctx, cf := context.WithTimeout(ctx, time.Second)
defer cf()
mtu := n1.MTU(ctx, n2.LocalAddr())
require.GreaterOrEqual(t, mtu, inet256.MinMTU)
})
t.Run("FindAddr", func(t *testing.T) {
xs := make([]inet256.Service, 2)
sf(t, xs)
n1 := OpenNode(t, xs[0], 1)
n2 := OpenNode(t, xs[1], 2)
n2Addr := n2.LocalAddr()
addr, err := n1.FindAddr(ctx, n2Addr[:1], 7)
require.NoError(t, err)
require.Equal(t, addr, n2Addr)
})
t.Run("LookupPublicKey", func(t *testing.T) {
xs := make([]inet256.Service, 2)
sf(t, xs)
n1 := OpenNode(t, xs[0], 1)
n2 := OpenNode(t, xs[1], 2)
pubKey, err := n1.LookupPublicKey(ctx, n2.LocalAddr())
require.NoError(t, err)
require.Equal(t, inet256.MarshalPublicKey(nil, n2.PublicKey()), inet256.MarshalPublicKey(nil, pubKey))
})
}
func testServerSend(t *testing.T, s inet256.Service) {
ctx := context.Background()
const N = 5
nodes := make([]inet256.Node, N)
for i := range nodes {
pk := NewPrivateKey(t, i)
n, err := s.Open(ctx, pk)
require.NoError(t, err)
nodes[i] = n
}
t.Log("created", N, "nodes")
randomPairs(len(nodes), func(i, j int) {
TestSendRecvOne(t, nodes[i], nodes[j])
})
}
func testMultipleServers(t *testing.T, srvs ...inet256.Service) {
ctx := context.Background()
const N = 5
nodes := make([]inet256.Node, len(srvs)*N)
for i, s := range srvs {
for j := 0; j < N; j++ {
pk := NewPrivateKey(t, i*N+j)
n, err := s.Open(ctx, pk)
require.NoError(t, err)
nodes[i*N+j] = n
}
}
t.Log("created", N, "nodes", "on each of", len(srvs), "servers")
randomPairs(len(nodes), func(i, j int) {
TestSendRecvOne(t, nodes[i], nodes[j])
})
}
func TestSendRecvOne(t testing.TB, src, dst inet256.Node) {
ctx, cf := context.WithTimeout(context.Background(), 2*time.Second)
defer cf()
eg := errgroup.Group{}
var recieved inet256.Message
eg.Go(func() error {
if err := inet256.Receive(ctx, dst, &recieved); err != nil {
return err
}
return nil
})
sent := "test data"
eg.Go(func() error {
return src.Send(ctx, dst.LocalAddr(), []byte(sent))
})
require.NoError(t, eg.Wait())
require.Equal(t, sent, string(recieved.Payload))
// require.Equal(t, src.LocalAddr(), recieved.Src)
require.Equal(t, dst.LocalAddr(), recieved.Dst)
}
func randomPairs(n int, fn func(i, j int)) {
for _, i := range rand.Perm(n) {
for _, j := range rand.Perm(n) {
if i != j {
fn(i, j)
}
}
}
}
// NewPrivateKey creates an insecure, but deterministic, and easy to recreate private key suitable for tests.
func NewPrivateKey(t testing.TB, i int) inet256.PrivateKey {
pk := p2ptest.NewTestKey(t, i)
pk2, err := inet256.PrivateKeyFromBuiltIn(pk)
require.NoError(t, err)
return pk2
}
func OpenNode(t testing.TB, s inet256.Service, i int) inet256.Node {
ctx := context.Background()
pk := NewPrivateKey(t, i)
n, err := s.Open(ctx, pk)
require.NoError(t, err)
t.Cleanup(func() {
n.Close()
})
return n
}