vendor/github.com/go-kit/kit/metrics/timer_test.go

   1 package metrics_test
   2
   3 import (
   4         "math"
   5         "testing"
   6
   7         "time"
   8
   9         "github.com/go-kit/kit/metrics"
  10         "github.com/go-kit/kit/metrics/generic"
  11 )
  12
  13 func TestTimerFast(t *testing.T) {
  14         h := generic.NewSimpleHistogram()
  15         metrics.NewTimer(h).ObserveDuration()
  16
  17         tolerance := 0.050
  18         if want, have := 0.000, h.ApproximateMovingAverage(); math.Abs(want-have) > tolerance {
  19                 t.Errorf("want %.3f, have %.3f", want, have)
  20         }
  21 }
  22
  23 func TestTimerSlow(t *testing.T) {
  24         h := generic.NewSimpleHistogram()
  25         timer := metrics.NewTimer(h)
  26         time.Sleep(250 * time.Millisecond)
  27         timer.ObserveDuration()
  28
  29         tolerance := 0.050
  30         if want, have := 0.250, h.ApproximateMovingAverage(); math.Abs(want-have) > tolerance {
  31                 t.Errorf("want %.3f, have %.3f", want, have)
  32         }
  33 }
  34
  35 func TestTimerUnit(t *testing.T) {
  36         for _, tc := range []struct {
  37                 name      string
  38                 unit      time.Duration
  39                 tolerance float64
  40                 want      float64
  41         }{
  42                 {"Seconds", time.Second, 0.010, 0.100},
  43                 {"Milliseconds", time.Millisecond, 10, 100},
  44                 {"Nanoseconds", time.Nanosecond, 10000000, 100000000},
  45         } {
  46                 t.Run(tc.name, func(t *testing.T) {
  47                         h := generic.NewSimpleHistogram()
  48                         timer := metrics.NewTimer(h)
  49                         time.Sleep(100 * time.Millisecond)
  50                         timer.Unit(tc.unit)
  51                         timer.ObserveDuration()
  52
  53                         if want, have := tc.want, h.ApproximateMovingAverage(); math.Abs(want-have) > tc.tolerance {
  54                                 t.Errorf("want %.3f, have %.3f", want, have)
  55                         }
  56                 })
  57         }
  58 }