pipeln - Trivial in-memory full-duplex listener and dialer.

pipeln implements a trivial type, PipeListenerDialer, that can be used both as a net.Listener and as a dialer. It uses net.Pipe to connect server and clients so that testing client-server communication becomes easier.

Several dialer methods are available, and happen (as there is no net.Dialer interface) to be compatible with both net.Transport and grpc.WithContextDialer.

For instance:

func TestHTTP(t *testing.T) {
    ln := pipeln.New("test:80")

    srv := http.Server{}
    go srv.Serve(ln)

    client := http.Client{Transport: &http.Transport{DialContext: ln.DialContext}}

    // ...
}

func TestGRPC(t *testing.T) {
    ln := pipeln.New("test")

    srv := grpc.NewServer()
    go srv.Serve(ln)

    client, _ := grpc.Dial("test", grpc.WithContextDialer(ln.DialContextAddr), grpc.WithInsecure())

    // ...
}