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ec02e9ba19
The original code uses this function - see 48d52eeea6/pkg/quantile/sparse.go (L138)
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/pull/5775
31 lines
727 B
Go
31 lines
727 B
Go
package datadogsketches
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import (
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"math"
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"testing"
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)
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func TestDogsketchQuantile(t *testing.T) {
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f := func(d *Dogsketch, q float64, vExpected float64) {
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t.Helper()
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v := d.quantile(q)
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if math.Abs(v-vExpected) > 0.01 {
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t.Fatalf("unexpected value; got %v; want %v", v, vExpected)
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}
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}
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sketches := &Dogsketch{
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Min: 8.0,
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Max: 21.0,
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Cnt: 17,
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N: []uint32{0x0, 0x0, 0x1, 0x0, 0x1, 0x4, 0x6, 0x1, 0x2, 0x0, 0x1, 0x0, 0x1},
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K: []int32{0, 1472, 1473, 1479, 1480, 1503, 1504, 1512, 1513, 1514, 1515, 1531, 1532},
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}
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f(sketches, 0, 8)
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f(sketches, 0.1, 12.91)
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f(sketches, 0.5, 13.18)
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f(sketches, 0.75, 14.84)
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f(sketches, 0.9, 15.19)
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f(sketches, 0.95, 15.55)
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f(sketches, 0.99, 20.24)
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f(sketches, 1, 21)
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}
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