package main import ( "context" "crypto/rand" "fmt" "log" "testing" "time" "github.com/libp2p/go-libp2p/core/network" "github.com/libp2p/go-libp2p/examples/testutils" ) func TestMain(t *testing.T) { var h testutils.LogHarness h.Expect("Waiting for incoming connection") h.Expect("Established connection to destination") h.Expect("Got a new stream!") h.Run(t, func() { // Create a context that will stop the hosts when the tests end ctx, cancel := context.WithCancel(context.Background()) defer cancel() port1, err := testutils.FindFreePort(t, "", 5) if err != nil { log.Println(err) return } port2, err := testutils.FindFreePort(t, "", 5) if err != nil { log.Println(err) return } h1, err := makeHost(port1, rand.Reader) if err != nil { log.Println(err) return } go startPeer(ctx, h1, func(network.Stream) { log.Println("Got a new stream!") // Sleep a bit to let h2 print the logs we're waiting for time.Sleep(500 * time.Millisecond) cancel() // end the test }) dest := fmt.Sprintf("/ip4/127.0.0.1/tcp/%v/p2p/%s", port1, h1.ID().Pretty()) h2, err := makeHost(port2, rand.Reader) if err != nil { log.Println(err) return } go func() { rw, err := startPeerAndConnect(ctx, h2, dest) if err != nil { log.Println(err) return } rw.WriteString("test message") rw.Flush() }() <-ctx.Done() }) }