120 lines
2.4 KiB
Go
120 lines
2.4 KiB
Go
package client_test
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import (
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"bufio"
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"net"
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"testing"
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"git.lang-dieter.de/rs2322tcp/internal/client"
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"git.lang-dieter.de/rs2322tcp/internal/transport"
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)
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func TestClientOpenDataConnection(t *testing.T) {
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dataListener, err := net.Listen("tcp", "127.0.0.1:0")
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if err != nil {
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t.Fatalf("data listener failed: %v", err)
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}
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defer dataListener.Close()
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dataPort := dataListener.Addr().(*net.TCPAddr).Port
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controlListener, err := net.Listen("tcp", "127.0.0.1:0")
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if err != nil {
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t.Fatalf("control listener failed: %v", err)
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}
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defer controlListener.Close()
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serverDone := make(chan error, 1)
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go func() {
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conn, err := controlListener.Accept()
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if err != nil {
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serverDone <- err
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return
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}
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defer conn.Close()
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reader := bufio.NewReader(conn)
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var hello transport.HelloMessage
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if err := transport.ReadMessage(reader, &hello); err != nil {
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serverDone <- err
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return
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}
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if hello.Type != transport.MessageHello {
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serverDone <- &testError{
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message: "unexpected hello message type",
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}
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return
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}
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if err := transport.WriteMessage(
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conn,
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transport.NewHelloResponse(),
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); err != nil {
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serverDone <- err
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return
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}
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serverDone <- nil
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}()
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clientConn, err := client.New(controlListener.Addr().String())
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if err != nil {
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t.Fatalf("client.New() failed: %v", err)
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}
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defer clientConn.Close()
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device := transport.RemoteDeviceInfo{
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ID: "radio",
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Name: "Funkgerät",
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DataPort: dataPort,
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}
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dataConn, err := clientConn.OpenDataConnection(device)
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if err != nil {
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t.Fatalf("OpenDataConnection() failed: %v", err)
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}
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defer dataConn.Close()
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serverDataConn, err := dataListener.Accept()
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if err != nil {
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t.Fatalf("data listener Accept() failed: %v", err)
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}
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defer serverDataConn.Close()
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if err := <-serverDone; err != nil {
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t.Fatalf("control server failed: %v", err)
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}
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// Verify that the data connection is actually usable.
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message := []byte("test")
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if _, err := dataConn.Write(message); err != nil {
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t.Fatalf("data connection Write() failed: %v", err)
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}
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buffer := make([]byte, len(message))
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if _, err := serverDataConn.Read(buffer); err != nil {
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t.Fatalf("data connection Read() failed: %v", err)
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}
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if string(buffer) != string(message) {
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t.Fatalf(
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"received %q, want %q",
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string(buffer),
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string(message),
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)
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}
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}
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type testError struct {
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message string
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}
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func (e *testError) Error() string {
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return e.message
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}
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