Add test for metrics+unix

Author: MarcoPolo

p2p/transport/tcp/metrics_unix_test.go

@@ -0,0 +1,33 @@
+// go:build: unix
+
+package tcp
+
+import (
+	"testing"
+
+	tptu "github.com/libp2p/go-libp2p/p2p/net/upgrader"
+	"github.com/libp2p/go-libp2p/p2p/transport/tcpreuse"
+	ttransport "github.com/libp2p/go-libp2p/p2p/transport/testsuite"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestTcpTransportCollectsMetricsWithSharedTcpSocket(t *testing.T) {
+	peerA, ia := makeInsecureMuxer(t)
+	_, ib := makeInsecureMuxer(t)
+
+	sharedTCPSocketA := tcpreuse.NewConnMgr(false, nil, nil)
+	sharedTCPSocketB := tcpreuse.NewConnMgr(false, nil, nil)
+
+	ua, err := tptu.New(ia, muxers, nil, nil, nil)
+	require.NoError(t, err)
+	ta, err := NewTCPTransport(ua, nil, sharedTCPSocketA, WithMetrics())
+	require.NoError(t, err)
+	ub, err := tptu.New(ib, muxers, nil, nil, nil)
+	require.NoError(t, err)
+	tb, err := NewTCPTransport(ub, nil, sharedTCPSocketB, WithMetrics())
+	require.NoError(t, err)
+
+	zero := "/ip4/127.0.0.1/tcp/0"
+	ttransport.SubtestTransport(t, ta, tb, zero, peerA)
+}

p2p/transport/tcpreuse/connwithscope.go

@@ -0,0 +1,26 @@
+package tcpreuse
+
+import (
+	"fmt"
+
+	"github.com/libp2p/go-libp2p/core/network"
+	"github.com/libp2p/go-libp2p/p2p/transport/tcpreuse/internal/sampledconn"
+	manet "github.com/multiformats/go-multiaddr/net"
+)
+
+type connWithScope struct {
+	sampledconn.ManetTCPConnInterface
+	scope network.ConnManagementScope
+}
+
+func (c connWithScope) Scope() network.ConnManagementScope {
+	return c.scope
+}
+
+func manetConnWithScope(c manet.Conn, scope network.ConnManagementScope) (manet.Conn, error) {
+	if tcpconn, ok := c.(sampledconn.ManetTCPConnInterface); ok {
+		return &connWithScope{tcpconn, scope}, nil
+	}
+
+	return nil, fmt.Errorf("manet.Conn is not a TCP Conn")
+}