87 lines
2.4 KiB
Go
87 lines
2.4 KiB
Go
// Copyright The OpenTelemetry Authors
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// SPDX-License-Identifier: Apache-2.0
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package scraper
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import (
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"context"
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"errors"
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"sync"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"go.opentelemetry.io/collector/component"
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"go.opentelemetry.io/collector/component/componenttest"
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"go.opentelemetry.io/collector/pdata/pmetric"
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)
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func TestNewMetrics(t *testing.T) {
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mp, err := NewMetrics(newTestScrapeMetricsFunc(nil))
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require.NoError(t, err)
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require.NoError(t, mp.Start(context.Background(), componenttest.NewNopHost()))
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md, err := mp.ScrapeMetrics(context.Background())
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require.NoError(t, err)
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assert.Equal(t, pmetric.NewMetrics(), md)
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require.NoError(t, mp.Shutdown(context.Background()))
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}
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func TestNewMetrics_WithOptions(t *testing.T) {
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want := errors.New("my_error")
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mp, err := NewMetrics(newTestScrapeMetricsFunc(nil),
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WithStart(func(context.Context, component.Host) error { return want }),
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WithShutdown(func(context.Context) error { return want }))
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require.NoError(t, err)
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assert.Equal(t, want, mp.Start(context.Background(), componenttest.NewNopHost()))
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assert.Equal(t, want, mp.Shutdown(context.Background()))
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}
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func TestNewMetrics_NilRequiredFields(t *testing.T) {
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_, err := NewMetrics(nil)
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require.Error(t, err)
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}
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func TestNewMetrics_ProcessMetricsError(t *testing.T) {
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want := errors.New("my_error")
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mp, err := NewMetrics(newTestScrapeMetricsFunc(want))
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require.NoError(t, err)
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_, err = mp.ScrapeMetrics(context.Background())
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require.ErrorIs(t, err, want)
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}
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func TestMetricsConcurrency(t *testing.T) {
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incomingMetrics := pmetric.NewMetrics()
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dps := incomingMetrics.ResourceMetrics().AppendEmpty().ScopeMetrics().AppendEmpty().Metrics().AppendEmpty().SetEmptySum().DataPoints()
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// Add 2 data points to the incoming
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dps.AppendEmpty()
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dps.AppendEmpty()
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mp, err := NewMetrics(newTestScrapeMetricsFunc(nil))
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require.NoError(t, err)
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require.NoError(t, mp.Start(context.Background(), componenttest.NewNopHost()))
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var wg sync.WaitGroup
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for i := 0; i < 10; i++ {
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wg.Add(1)
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go func() {
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defer wg.Done()
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for j := 0; j < 10000; j++ {
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_, errScrape := mp.ScrapeMetrics(context.Background())
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assert.NoError(t, errScrape)
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}
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}()
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}
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wg.Wait()
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require.NoError(t, mp.Shutdown(context.Background()))
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}
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func newTestScrapeMetricsFunc(retError error) ScrapeMetricsFunc {
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return func(_ context.Context) (pmetric.Metrics, error) {
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return pmetric.NewMetrics(), retError
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}
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}
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