telegraf/plugins/aggregators/histogram/histogram_test.go

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package histogram
import (
"fmt"
"testing"
"time"
"github.com/influxdata/telegraf"
"github.com/influxdata/telegraf/metric"
"github.com/influxdata/telegraf/testutil"
"github.com/stretchr/testify/assert"
)
// NewTestHistogram creates new test histogram aggregation with specified config
func NewTestHistogram(cfg []config) telegraf.Aggregator {
htm := &HistogramAggregator{Configs: cfg}
htm.buckets = make(bucketsByMetrics)
htm.resetCache()
return htm
}
// firstMetric1 is the first test metric
var firstMetric1, _ = metric.New(
"first_metric_name",
map[string]string{"tag_name": "tag_value"},
map[string]interface{}{
"a": float64(15.3),
"b": float64(40),
},
time.Now(),
)
// firstMetric1 is the first test metric with other value
var firstMetric2, _ = metric.New(
"first_metric_name",
map[string]string{"tag_name": "tag_value"},
map[string]interface{}{
"a": float64(15.9),
"c": float64(40),
},
time.Now(),
)
// secondMetric is the second metric
var secondMetric, _ = metric.New(
"second_metric_name",
map[string]string{"tag_name": "tag_value"},
map[string]interface{}{
"a": float64(105),
"ignoreme": "string",
"andme": true,
},
time.Now(),
)
// BenchmarkApply runs benchmarks
func BenchmarkApply(b *testing.B) {
histogram := NewHistogramAggregator()
for n := 0; n < b.N; n++ {
histogram.Add(firstMetric1)
histogram.Add(firstMetric2)
histogram.Add(secondMetric)
}
}
// TestHistogramWithPeriodAndOneField tests metrics for one period and for one field
func TestHistogramWithPeriodAndOneField(t *testing.T) {
var cfg []config
cfg = append(cfg, config{Metric: "first_metric_name", Fields: []string{"a"}, Buckets: []float64{0.0, 10.0, 20.0, 30.0, 40.0}})
histogram := NewTestHistogram(cfg)
acc := &testutil.Accumulator{}
histogram.Add(firstMetric1)
histogram.Add(firstMetric2)
histogram.Push(acc)
if len(acc.Metrics) != 6 {
assert.Fail(t, "Incorrect number of metrics")
}
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(0)}, "0")
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(0)}, "10")
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(2)}, "20")
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(2)}, "30")
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(2)}, "40")
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(2)}, bucketInf)
}
// TestHistogramWithPeriodAndAllFields tests two metrics for one period and for all fields
func TestHistogramWithPeriodAndAllFields(t *testing.T) {
var cfg []config
cfg = append(cfg, config{Metric: "first_metric_name", Buckets: []float64{0.0, 15.5, 20.0, 30.0, 40.0}})
cfg = append(cfg, config{Metric: "second_metric_name", Buckets: []float64{0.0, 4.0, 10.0, 23.0, 30.0}})
histogram := NewTestHistogram(cfg)
acc := &testutil.Accumulator{}
histogram.Add(firstMetric1)
histogram.Add(firstMetric2)
histogram.Add(secondMetric)
histogram.Push(acc)
if len(acc.Metrics) != 12 {
assert.Fail(t, "Incorrect number of metrics")
}
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(0), "b_bucket": int64(0), "c_bucket": int64(0)}, "0")
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(1), "b_bucket": int64(0), "c_bucket": int64(0)}, "15.5")
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(2), "b_bucket": int64(0), "c_bucket": int64(0)}, "20")
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(2), "b_bucket": int64(0), "c_bucket": int64(0)}, "30")
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(2), "b_bucket": int64(1), "c_bucket": int64(1)}, "40")
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(2), "b_bucket": int64(1), "c_bucket": int64(1)}, bucketInf)
assertContainsTaggedField(t, acc, "second_metric_name", map[string]interface{}{"a_bucket": int64(0), "ignoreme_bucket": int64(0), "andme_bucket": int64(0)}, "0")
assertContainsTaggedField(t, acc, "second_metric_name", map[string]interface{}{"a_bucket": int64(0), "ignoreme_bucket": int64(0), "andme_bucket": int64(0)}, "4")
assertContainsTaggedField(t, acc, "second_metric_name", map[string]interface{}{"a_bucket": int64(0), "ignoreme_bucket": int64(0), "andme_bucket": int64(0)}, "10")
assertContainsTaggedField(t, acc, "second_metric_name", map[string]interface{}{"a_bucket": int64(0), "ignoreme_bucket": int64(0), "andme_bucket": int64(0)}, "23")
assertContainsTaggedField(t, acc, "second_metric_name", map[string]interface{}{"a_bucket": int64(0), "ignoreme_bucket": int64(0), "andme_bucket": int64(0)}, "30")
assertContainsTaggedField(t, acc, "second_metric_name", map[string]interface{}{"a_bucket": int64(1), "ignoreme_bucket": int64(0), "andme_bucket": int64(0)}, bucketInf)
}
// TestHistogramDifferentPeriodsAndAllFields tests two metrics getting added with a push/reset in between (simulates
// getting added in different periods) for all fields
func TestHistogramDifferentPeriodsAndAllFields(t *testing.T) {
var cfg []config
cfg = append(cfg, config{Metric: "first_metric_name", Buckets: []float64{0.0, 10.0, 20.0, 30.0, 40.0}})
histogram := NewTestHistogram(cfg)
acc := &testutil.Accumulator{}
histogram.Add(firstMetric1)
histogram.Push(acc)
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(0), "b_bucket": int64(0)}, "0")
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(0), "b_bucket": int64(0)}, "10")
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(1), "b_bucket": int64(0)}, "20")
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(1), "b_bucket": int64(0)}, "30")
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(1), "b_bucket": int64(1)}, "40")
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(1), "b_bucket": int64(1)}, bucketInf)
acc.ClearMetrics()
histogram.Add(firstMetric2)
histogram.Push(acc)
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(0), "b_bucket": int64(0), "c_bucket": int64(0)}, "0")
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(0), "b_bucket": int64(0), "c_bucket": int64(0)}, "10")
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(2), "b_bucket": int64(0), "c_bucket": int64(0)}, "20")
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(2), "b_bucket": int64(0), "c_bucket": int64(0)}, "30")
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(2), "b_bucket": int64(1), "c_bucket": int64(1)}, "40")
assertContainsTaggedField(t, acc, "first_metric_name", map[string]interface{}{"a_bucket": int64(2), "b_bucket": int64(1), "c_bucket": int64(1)}, bucketInf)
}
// TestWrongBucketsOrder tests the calling panic with incorrect order of buckets
func TestWrongBucketsOrder(t *testing.T) {
defer func() {
if r := recover(); r != nil {
assert.Equal(
t,
"histogram buckets must be in increasing order: 90.00 >= 20.00, metrics: first_metric_name, field: a",
fmt.Sprint(r),
)
}
}()
var cfg []config
cfg = append(cfg, config{Metric: "first_metric_name", Buckets: []float64{0.0, 90.0, 20.0, 30.0, 40.0}})
histogram := NewTestHistogram(cfg)
histogram.Add(firstMetric2)
}
// assertContainsTaggedField is help functions to test histogram data
func assertContainsTaggedField(t *testing.T, acc *testutil.Accumulator, metricName string, fields map[string]interface{}, le string) {
acc.Lock()
defer acc.Unlock()
for _, checkedMetric := range acc.Metrics {
// check metric name
if checkedMetric.Measurement != metricName {
continue
}
// check "le" tag
if checkedMetric.Tags[bucketTag] != le {
continue
}
// check fields
isFieldsIdentical := true
for field := range fields {
if _, ok := checkedMetric.Fields[field]; !ok {
isFieldsIdentical = false
break
}
}
if !isFieldsIdentical {
continue
}
// check fields with their counts
if assert.Equal(t, fields, checkedMetric.Fields) {
return
}
assert.Fail(t, fmt.Sprintf("incorrect fields %v of metric %s", fields, metricName))
}
assert.Fail(t, fmt.Sprintf("unknown measurement '%s' with tags: %v, fields: %v", metricName, map[string]string{"le": le}, fields))
}