jleung
f85c3ef781
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Lx9FNLG2CqeBbVGGd9bFsP
57 lines
1.6 KiB
Go
57 lines
1.6 KiB
Go
package main
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import (
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"testing"
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"time"
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)
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func TestCounterSeriesIsMonotonicAndDeterministic(t *testing.T) {
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start := time.Date(2026, 9, 1, 0, 0, 0, 0, time.UTC)
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a := counterSeries(patternDiurnal, start, 3*24*60, time.Minute, 1_000_000, 7)
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b := counterSeries(patternDiurnal, start, 3*24*60, time.Minute, 1_000_000, 7)
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for i := range a {
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if a[i] != b[i] {
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t.Fatalf("not deterministic at %d", i)
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}
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if i > 0 && a[i] < a[i-1] {
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t.Fatalf("decreased at %d", i)
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}
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}
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if a[0] != 0 {
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t.Fatalf("starts at %v, want 0", a[0])
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}
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meanRate := a[len(a)-1] / (float64(len(a)-1) * 60)
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if meanRate < 0.8e6 || meanRate > 1.4e6 {
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t.Fatalf("mean rate %.0f B/s drifted from 1e6", meanRate)
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}
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}
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func TestDiurnalEveningBusierThanNight(t *testing.T) {
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// Monday, so the weekend factor does not interfere. Averaged over many days the noise washes out.
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var night, evening float64
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for d := 0; d < 28; d++ {
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day := time.Date(2026, 9, 7, 0, 0, 0, 0, time.UTC).AddDate(0, 0, d)
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if wd := day.Weekday(); wd == time.Saturday || wd == time.Sunday {
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continue
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}
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night += rateFactor(patternDiurnal, day.Add(5*time.Hour), 1)
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evening += rateFactor(patternDiurnal, day.Add(20*time.Hour), 1)
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}
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if evening < 2*night {
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t.Fatalf("evening %.2f is not clearly busier than night %.2f", evening, night)
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}
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}
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func TestFlatPatternIsConstant(t *testing.T) {
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if f := rateFactor(patternFlat, time.Now(), 3); f != 1 {
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t.Fatalf("flat factor %v", f)
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}
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}
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func TestDefaultMeanIsStableAndBounded(t *testing.T) {
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m := defaultMeanBytesPerSec("01abc", 1)
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if m != defaultMeanBytesPerSec("01abc", 1) || m < 2*125_000 || m > 60*125_000 {
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t.Fatalf("mean %v", m)
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}
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}
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