http3: migrate the server tests away from Ginkgo (#5085)

* http3: migrate the server tests away from Ginkgo

* http3: add a test for server settings

http3/http3_suite_test.go

@@ -1,6 +1,7 @@
 package http3
 
 import (
+	"net"
 	"os"
 	"strconv"
 	"testing"
@@ -8,6 +9,7 @@ import (
 
 	. "github.com/onsi/ginkgo/v2"
 	. "github.com/onsi/gomega"
+	"github.com/stretchr/testify/require"
 	"go.uber.org/mock/gomock"
 )
 
@@ -16,6 +18,14 @@ func TestHttp3(t *testing.T) {
 	RunSpecs(t, "HTTP/3 Suite")
 }
 
+func newUDPConnLocalhost(t testing.TB) *net.UDPConn {
+	t.Helper()
+	conn, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 0})
+	require.NoError(t, err)
+	t.Cleanup(func() { conn.Close() })
+	return conn
+}
+
 var mockCtrl *gomock.Controller
 
 var _ = BeforeEach(func() {

http3/server.go

@@ -24,16 +24,6 @@ import (
 	"github.com/quic-go/qpack"
 )
 
-// allows mocking of quic.Listen and quic.ListenAddr
-var (
-	quicListen = func(conn net.PacketConn, tlsConf *tls.Config, config *quic.Config) (QUICEarlyListener, error) {
-		return quic.ListenEarly(conn, tlsConf, config)
-	}
-	quicListenAddr = func(addr string, tlsConf *tls.Config, config *quic.Config) (QUICEarlyListener, error) {
-		return quic.ListenAddrEarly(addr, tlsConf, config)
-	}
-)
-
 // NextProtoH3 is the ALPN protocol negotiated during the TLS handshake, for QUIC v1 and v2.
 const NextProtoH3 = "h3"
 
@@ -349,9 +339,9 @@ func (s *Server) setupListenerForConn(tlsConf *tls.Config, conn net.PacketConn)
 		if addr == "" {
 			addr = ":https"
 		}
-		ln, err = quicListenAddr(addr, baseConf, quicConf)
+		ln, err = quic.ListenAddrEarly(addr, baseConf, quicConf)
 	} else {
-		ln, err = quicListen(conn, baseConf, quicConf)
+		ln, err = quic.ListenEarly(conn, baseConf, quicConf)
 	}
 	if err != nil {
 		return nil, err