Official Go implementation of the Ethereum protocol
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go-ethereum/metrics/histogram_test.go

96 lines
2.3 KiB

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); h.Count() != 1 {
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(); count != 0 {
t.Errorf("h.Count(): 0 != %v\n", count)
}
if min := h.Min(); min != 0 {
t.Errorf("h.Min(): 0 != %v\n", min)
}
if max := h.Max(); max != 0 {
t.Errorf("h.Max(): 0 != %v\n", max)
}
if mean := h.Mean(); mean != 0.0 {
t.Errorf("h.Mean(): 0.0 != %v\n", mean)
}
if stdDev := h.StdDev(); stdDev != 0.0 {
t.Errorf("h.StdDev(): 0.0 != %v\n", stdDev)
}
ps := h.Percentiles([]float64{0.5, 0.75, 0.99})
if ps[0] != 0.0 {
t.Errorf("median: 0.0 != %v\n", ps[0])
}
if ps[1] != 0.0 {
t.Errorf("75th percentile: 0.0 != %v\n", ps[1])
}
if ps[2] != 0.0 {
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(); count != 10000 {
t.Errorf("h.Count(): 10000 != %v\n", count)
}
if min := h.Min(); min != 1 {
t.Errorf("h.Min(): 1 != %v\n", min)
}
if max := h.Max(); max != 10000 {
t.Errorf("h.Max(): 10000 != %v\n", max)
}
if mean := h.Mean(); mean != 5000.5 {
t.Errorf("h.Mean(): 5000.5 != %v\n", mean)
}
if stdDev := h.StdDev(); stdDev != 2886.751331514372 {
t.Errorf("h.StdDev(): 2886.751331514372 != %v\n", stdDev)
}
ps := h.Percentiles([]float64{0.5, 0.75, 0.99})
if ps[0] != 5000.5 {
t.Errorf("median: 5000.5 != %v\n", ps[0])
}
if ps[1] != 7500.75 {
t.Errorf("75th percentile: 7500.75 != %v\n", ps[1])
}
if ps[2] != 9900.99 {
t.Errorf("99th percentile: 9900.99 != %v\n", ps[2])
}
}