package socket_writer import ( "bufio" "bytes" "io/ioutil" "net" "os" "path/filepath" "sync" "testing" "github.com/influxdata/telegraf" "github.com/influxdata/telegraf/testutil" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" ) func TestSocketWriter_tcp(t *testing.T) { listener, err := net.Listen("tcp", "127.0.0.1:0") require.NoError(t, err) sw := newSocketWriter() sw.Address = "tcp://" + listener.Addr().String() err = sw.Connect() require.NoError(t, err) lconn, err := listener.Accept() require.NoError(t, err) testSocketWriter_stream(t, sw, lconn) } func TestSocketWriter_udp(t *testing.T) { listener, err := net.ListenPacket("udp", "127.0.0.1:0") require.NoError(t, err) sw := newSocketWriter() sw.Address = "udp://" + listener.LocalAddr().String() err = sw.Connect() require.NoError(t, err) testSocketWriter_packet(t, sw, listener) } func TestSocketWriter_unix(t *testing.T) { tmpdir, err := ioutil.TempDir("", "telegraf") require.NoError(t, err) defer os.RemoveAll(tmpdir) sock := filepath.Join(tmpdir, "sw.TestSocketWriter_unix.sock") listener, err := net.Listen("unix", sock) require.NoError(t, err) sw := newSocketWriter() sw.Address = "unix://" + sock err = sw.Connect() require.NoError(t, err) lconn, err := listener.Accept() require.NoError(t, err) testSocketWriter_stream(t, sw, lconn) } func TestSocketWriter_unixgram(t *testing.T) { tmpdir, err := ioutil.TempDir("", "telegraf") require.NoError(t, err) defer os.RemoveAll(tmpdir) sock := filepath.Join(tmpdir, "sw.TSW_unixgram.sock") listener, err := net.ListenPacket("unixgram", sock) require.NoError(t, err) sw := newSocketWriter() sw.Address = "unixgram://" + sock err = sw.Connect() require.NoError(t, err) testSocketWriter_packet(t, sw, listener) } func testSocketWriter_stream(t *testing.T, sw *SocketWriter, lconn net.Conn) { metrics := []telegraf.Metric{} metrics = append(metrics, testutil.TestMetric(1, "test")) mbs1out, _ := sw.Serialize(metrics[0]) metrics = append(metrics, testutil.TestMetric(2, "test")) mbs2out, _ := sw.Serialize(metrics[1]) err := sw.Write(metrics) require.NoError(t, err) scnr := bufio.NewScanner(lconn) require.True(t, scnr.Scan()) mstr1in := scnr.Text() + "\n" require.True(t, scnr.Scan()) mstr2in := scnr.Text() + "\n" assert.Equal(t, string(mbs1out), mstr1in) assert.Equal(t, string(mbs2out), mstr2in) } func testSocketWriter_packet(t *testing.T, sw *SocketWriter, lconn net.PacketConn) { metrics := []telegraf.Metric{} metrics = append(metrics, testutil.TestMetric(1, "test")) mbs1out, _ := sw.Serialize(metrics[0]) metrics = append(metrics, testutil.TestMetric(2, "test")) mbs2out, _ := sw.Serialize(metrics[1]) err := sw.Write(metrics) require.NoError(t, err) buf := make([]byte, 256) var mstrins []string for len(mstrins) < 2 { n, _, err := lconn.ReadFrom(buf) require.NoError(t, err) for _, bs := range bytes.Split(buf[:n], []byte{'\n'}) { if len(bs) == 0 { continue } mstrins = append(mstrins, string(bs)+"\n") } } require.Len(t, mstrins, 2) assert.Equal(t, string(mbs1out), mstrins[0]) assert.Equal(t, string(mbs2out), mstrins[1]) } func TestSocketWriter_Write_err(t *testing.T) { listener, err := net.Listen("tcp", "127.0.0.1:0") require.NoError(t, err) sw := newSocketWriter() sw.Address = "tcp://" + listener.Addr().String() err = sw.Connect() require.NoError(t, err) sw.Conn.(*net.TCPConn).SetReadBuffer(256) lconn, err := listener.Accept() require.NoError(t, err) lconn.(*net.TCPConn).SetWriteBuffer(256) metrics := []telegraf.Metric{testutil.TestMetric(1, "testerr")} // close the socket to generate an error lconn.Close() sw.Conn.Close() err = sw.Write(metrics) require.Error(t, err) assert.Nil(t, sw.Conn) } func TestSocketWriter_Write_reconnect(t *testing.T) { listener, err := net.Listen("tcp", "127.0.0.1:0") require.NoError(t, err) sw := newSocketWriter() sw.Address = "tcp://" + listener.Addr().String() err = sw.Connect() require.NoError(t, err) sw.Conn.(*net.TCPConn).SetReadBuffer(256) lconn, err := listener.Accept() require.NoError(t, err) lconn.(*net.TCPConn).SetWriteBuffer(256) lconn.Close() sw.Conn = nil wg := sync.WaitGroup{} wg.Add(1) var lerr error go func() { lconn, lerr = listener.Accept() wg.Done() }() metrics := []telegraf.Metric{testutil.TestMetric(1, "testerr")} err = sw.Write(metrics) require.NoError(t, err) wg.Wait() assert.NoError(t, lerr) mbsout, _ := sw.Serialize(metrics[0]) buf := make([]byte, 256) n, err := lconn.Read(buf) require.NoError(t, err) assert.Equal(t, string(mbsout), string(buf[:n])) }