/
opentelemetry_test.go
82 lines (65 loc) · 2.25 KB
/
opentelemetry_test.go
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package opentelemetry
import (
"context"
"net"
"testing"
"github.com/stretchr/testify/require"
"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/metric/global"
controller "go.opentelemetry.io/otel/sdk/metric/controller/basic"
processor "go.opentelemetry.io/otel/sdk/metric/processor/basic"
"go.opentelemetry.io/otel/sdk/metric/selector/simple"
"google.golang.org/grpc"
"google.golang.org/grpc/test/bufconn"
"github.com/influxdata/telegraf"
"github.com/influxdata/telegraf/plugins/inputs"
"github.com/influxdata/telegraf/testutil"
)
func TestOpenTelemetry(t *testing.T) {
mockListener := bufconn.Listen(1024 * 1024)
plugin := inputs.Inputs["opentelemetry"]().(*OpenTelemetry)
plugin.listener = mockListener
accumulator := new(testutil.Accumulator)
err := plugin.Start(accumulator)
require.NoError(t, err)
t.Cleanup(plugin.Stop)
metricExporter, err := otlpmetricgrpc.New(context.Background(),
otlpmetricgrpc.WithInsecure(),
otlpmetricgrpc.WithDialOption(
grpc.WithBlock(),
grpc.WithContextDialer(func(_ context.Context, _ string) (net.Conn, error) {
return mockListener.Dial()
})),
)
require.NoError(t, err)
t.Cleanup(func() { _ = metricExporter.Shutdown(context.Background()) })
pusher := controller.New(
processor.NewFactory(
simple.NewWithHistogramDistribution(),
metricExporter,
),
controller.WithExporter(metricExporter),
)
err = pusher.Start(context.Background())
require.NoError(t, err)
t.Cleanup(func() { _ = pusher.Stop(context.Background()) })
global.SetMeterProvider(pusher)
// write metrics
meter := global.Meter("library-name")
counter := metric.Must(meter).NewInt64Counter("measurement-counter")
meter.RecordBatch(context.Background(), nil, counter.Measurement(7))
err = pusher.Stop(context.Background())
require.NoError(t, err)
// Shutdown
plugin.Stop()
err = metricExporter.Shutdown(context.Background())
require.NoError(t, err)
// Check
require.Empty(t, accumulator.Errors)
require.Len(t, accumulator.Metrics, 1)
got := accumulator.Metrics[0]
require.Equal(t, "measurement-counter", got.Measurement)
require.Equal(t, telegraf.Counter, got.Type)
require.Equal(t, "library-name", got.Tags["otel.library.name"])
}