Add syslog input plugin (#4181)

plugins/inputs/syslog/syslog_test.go

@@ -0,0 +1,60 @@
+package syslog
+
+import (
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/influxdata/telegraf/testutil"
+	"github.com/stretchr/testify/require"
+)
+
+const (
+	address = ":6514"
+)
+
+var defaultTime = time.Unix(0, 0)
+var maxP = uint8(191)
+var maxV = uint16(999)
+var maxTS = "2017-12-31T23:59:59.999999+00:00"
+var maxH = "abcdefghilmnopqrstuvzabcdefghilmnopqrstuvzabcdefghilmnopqrstuvzabcdefghilmnopqrstuvzabcdefghilmnopqrstuvzabcdefghilmnopqrstuvzabcdefghilmnopqrstuvzabcdefghilmnopqrstuvzabcdefghilmnopqrstuvzabcdefghilmnopqrstuvzabcdefghilmnopqrstuvzabcdefghilmnopqrstuvzabc"
+var maxA = "abcdefghilmnopqrstuvzabcdefghilmnopqrstuvzabcdef"
+var maxPID = "abcdefghilmnopqrstuvzabcdefghilmnopqrstuvzabcdefghilmnopqrstuvzabcdefghilmnopqrstuvzabcdefghilmnopqrstuvzabcdefghilmnopqrstuvzab"
+var maxMID = "abcdefghilmnopqrstuvzabcdefghilm"
+var message7681 = strings.Repeat("l", 7681)
+
+func TestAddress(t *testing.T) {
+	var err error
+	var rec *Syslog
+
+	rec = &Syslog{
+		Address: "localhost:6514",
+	}
+	err = rec.Start(&testutil.Accumulator{})
+	require.EqualError(t, err, "missing protocol within address 'localhost:6514'")
+	require.Error(t, err)
+
+	rec = &Syslog{
+		Address: "unsupported://example.com:6514",
+	}
+	err = rec.Start(&testutil.Accumulator{})
+	require.EqualError(t, err, "unknown protocol 'unsupported' in 'example.com:6514'")
+	require.Error(t, err)
+
+	rec = &Syslog{
+		Address: "unixgram:///tmp/telegraf.sock",
+	}
+	err = rec.Start(&testutil.Accumulator{})
+	require.NoError(t, err)
+	require.Equal(t, "/tmp/telegraf.sock", rec.Address)
+	rec.Stop()
+
+	// Default port is 6514
+	rec = &Syslog{
+		Address: "tcp://localhost",
+	}
+	err = rec.Start(&testutil.Accumulator{})
+	require.NoError(t, err)
+	require.Equal(t, "localhost:6514", rec.Address)
+	rec.Stop()
+}