Adding upstream version 1.34.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

plugins/common/shim/output_test.go

@@ -0,0 +1,81 @@
+package shim
+
+import (
+	"io"
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/metric"
+	"github.com/influxdata/telegraf/plugins/serializers/influx"
+	"github.com/influxdata/telegraf/testutil"
+)
+
+func TestOutputShim(t *testing.T) {
+	o := &testOutput{}
+
+	stdinReader, stdinWriter := io.Pipe()
+
+	s := New()
+	s.stdin = stdinReader
+	err := s.AddOutput(o)
+	require.NoError(t, err)
+
+	wg := sync.WaitGroup{}
+
+	wg.Add(1)
+	go func() {
+		if err := s.RunOutput(); err != nil {
+			t.Error(err)
+		}
+		wg.Done()
+	}()
+
+	serializer := &influx.Serializer{}
+	require.NoError(t, serializer.Init())
+
+	m := metric.New("thing",
+		map[string]string{
+			"a": "b",
+		},
+		map[string]interface{}{
+			"v": 1,
+		},
+		time.Now(),
+	)
+	b, err := serializer.Serialize(m)
+	require.NoError(t, err)
+	_, err = stdinWriter.Write(b)
+	require.NoError(t, err)
+	err = stdinWriter.Close()
+	require.NoError(t, err)
+
+	wg.Wait()
+
+	require.Len(t, o.MetricsWritten, 1)
+	mOut := o.MetricsWritten[0]
+
+	testutil.RequireMetricEqual(t, m, mOut)
+}
+
+type testOutput struct {
+	MetricsWritten []telegraf.Metric
+}
+
+func (*testOutput) Connect() error {
+	return nil
+}
+func (*testOutput) Close() error {
+	return nil
+}
+func (o *testOutput) Write(metrics []telegraf.Metric) error {
+	o.MetricsWritten = append(o.MetricsWritten, metrics...)
+	return nil
+}
+
+func (*testOutput) SampleConfig() string {
+	return ""
+}