/histogram_test.go
http://github.com/rcrowley/go-metrics · Go · 95 lines · 88 code · 7 blank · 0 comment · 37 complexity · b41174fc02da11f746bb0a9ced1b5208 MD5 · raw file
- package metrics
- import "testing"
- func BenchmarkHistogram(b *testing.B) {
- h := NewHistogram(NewUniformSample(100))
- b.ResetTimer()
- for i := 0; i < b.N; i++ {
- h.Update(int64(i))
- }
- }
- func TestGetOrRegisterHistogram(t *testing.T) {
- r := NewRegistry()
- s := NewUniformSample(100)
- NewRegisteredHistogram("foo", r, s).Update(47)
- if h := GetOrRegisterHistogram("foo", r, s); 1 != h.Count() {
- t.Fatal(h)
- }
- }
- func TestHistogram10000(t *testing.T) {
- h := NewHistogram(NewUniformSample(100000))
- for i := 1; i <= 10000; i++ {
- h.Update(int64(i))
- }
- testHistogram10000(t, h)
- }
- func TestHistogramEmpty(t *testing.T) {
- h := NewHistogram(NewUniformSample(100))
- if count := h.Count(); 0 != count {
- t.Errorf("h.Count(): 0 != %v\n", count)
- }
- if min := h.Min(); 0 != min {
- t.Errorf("h.Min(): 0 != %v\n", min)
- }
- if max := h.Max(); 0 != max {
- t.Errorf("h.Max(): 0 != %v\n", max)
- }
- if mean := h.Mean(); 0.0 != mean {
- t.Errorf("h.Mean(): 0.0 != %v\n", mean)
- }
- if stdDev := h.StdDev(); 0.0 != stdDev {
- t.Errorf("h.StdDev(): 0.0 != %v\n", stdDev)
- }
- ps := h.Percentiles([]float64{0.5, 0.75, 0.99})
- if 0.0 != ps[0] {
- t.Errorf("median: 0.0 != %v\n", ps[0])
- }
- if 0.0 != ps[1] {
- t.Errorf("75th percentile: 0.0 != %v\n", ps[1])
- }
- if 0.0 != ps[2] {
- t.Errorf("99th percentile: 0.0 != %v\n", ps[2])
- }
- }
- func TestHistogramSnapshot(t *testing.T) {
- h := NewHistogram(NewUniformSample(100000))
- for i := 1; i <= 10000; i++ {
- h.Update(int64(i))
- }
- snapshot := h.Snapshot()
- h.Update(0)
- testHistogram10000(t, snapshot)
- }
- func testHistogram10000(t *testing.T, h Histogram) {
- if count := h.Count(); 10000 != count {
- t.Errorf("h.Count(): 10000 != %v\n", count)
- }
- if min := h.Min(); 1 != min {
- t.Errorf("h.Min(): 1 != %v\n", min)
- }
- if max := h.Max(); 10000 != max {
- t.Errorf("h.Max(): 10000 != %v\n", max)
- }
- if mean := h.Mean(); 5000.5 != mean {
- t.Errorf("h.Mean(): 5000.5 != %v\n", mean)
- }
- if stdDev := h.StdDev(); 2886.751331514372 != stdDev {
- t.Errorf("h.StdDev(): 2886.751331514372 != %v\n", stdDev)
- }
- ps := h.Percentiles([]float64{0.5, 0.75, 0.99})
- if 5000.5 != ps[0] {
- t.Errorf("median: 5000.5 != %v\n", ps[0])
- }
- if 7500.75 != ps[1] {
- t.Errorf("75th percentile: 7500.75 != %v\n", ps[1])
- }
- if 9900.99 != ps[2] {
- t.Errorf("99th percentile: 9900.99 != %v\n", ps[2])
- }
- }