telegraf/plugins/outputs/graphite/graphite_test.go

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package graphite
import (
"bufio"
"net"
"net/textproto"
"sync"
"testing"
"time"
"github.com/influxdata/telegraf"
"github.com/influxdata/telegraf/metric"
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"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestGraphiteError(t *testing.T) {
// Init plugin
g := Graphite{
Servers: []string{"127.0.0.1:2003", "127.0.0.1:12003"},
Prefix: "my.prefix",
}
// Init metrics
m1, _ := metric.New(
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"mymeasurement",
map[string]string{"host": "192.168.0.1"},
map[string]interface{}{"mymeasurement": float64(3.14)},
time.Date(2010, time.November, 10, 23, 0, 0, 0, time.UTC),
)
// Prepare point list
var metrics []telegraf.Metric
metrics = append(metrics, m1)
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// Error
err1 := g.Connect()
require.NoError(t, err1)
err2 := g.Write(metrics)
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require.Error(t, err2)
assert.Equal(t, "Could not write to any Graphite server in cluster\n", err2.Error())
}
func TestGraphiteOK(t *testing.T) {
var wg sync.WaitGroup
// Start TCP server
wg.Add(1)
t.Log("Starting server")
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TCPServer1(t, &wg)
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// Init plugin
g := Graphite{
Prefix: "my.prefix",
}
// Init metrics
m1, _ := metric.New(
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"mymeasurement",
map[string]string{"host": "192.168.0.1"},
map[string]interface{}{"myfield": float64(3.14)},
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time.Date(2010, time.November, 10, 23, 0, 0, 0, time.UTC),
)
m2, _ := metric.New(
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"mymeasurement",
map[string]string{"host": "192.168.0.1"},
map[string]interface{}{"value": float64(3.14)},
time.Date(2010, time.November, 10, 23, 0, 0, 0, time.UTC),
)
m3, _ := metric.New(
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"my_measurement",
map[string]string{"host": "192.168.0.1"},
map[string]interface{}{"value": float64(3.14)},
time.Date(2010, time.November, 10, 23, 0, 0, 0, time.UTC),
)
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// Prepare point list
metrics := []telegraf.Metric{m1}
metrics2 := []telegraf.Metric{m2, m3}
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err1 := g.Connect()
require.NoError(t, err1)
// Send Data
t.Log("Send first data")
err2 := g.Write(metrics)
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require.NoError(t, err2)
// Waiting TCPserver, should reconnect and resend
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wg.Wait()
t.Log("Finished Waiting for first data")
var wg2 sync.WaitGroup
// Start TCP server
wg2.Add(1)
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TCPServer2(t, &wg2)
//Write but expect an error, but reconnect
err3 := g.Write(metrics2)
t.Log("Finished writing second data, it should have reconnected automatically")
require.NoError(t, err3)
t.Log("Finished writing third data")
wg2.Wait()
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g.Close()
}
func TCPServer1(t *testing.T, wg *sync.WaitGroup) {
tcpServer, _ := net.Listen("tcp", "127.0.0.1:2003")
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go func() {
defer wg.Done()
conn, _ := (tcpServer).Accept()
reader := bufio.NewReader(conn)
tp := textproto.NewReader(reader)
data1, _ := tp.ReadLine()
assert.Equal(t, "my.prefix.192_168_0_1.mymeasurement.myfield 3.14 1289430000", data1)
conn.Close()
tcpServer.Close()
}()
}
func TCPServer2(t *testing.T, wg *sync.WaitGroup) {
tcpServer, _ := net.Listen("tcp", "127.0.0.1:2003")
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go func() {
defer wg.Done()
conn2, _ := (tcpServer).Accept()
reader := bufio.NewReader(conn2)
tp := textproto.NewReader(reader)
data2, _ := tp.ReadLine()
assert.Equal(t, "my.prefix.192_168_0_1.mymeasurement 3.14 1289430000", data2)
data3, _ := tp.ReadLine()
assert.Equal(t, "my.prefix.192_168_0_1.my_measurement 3.14 1289430000", data3)
conn2.Close()
tcpServer.Close()
}()
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}