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Fix flaky tests on hrw

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Michael 2026-01-02 10:56:04 +01:00 • committed by GitHub
parent cabcf19303
commit 1de72c715d
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2 changed files with 23 additions and 17 deletions
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13
pkg/server/service/loadbalancer/leasttime/leasttime_test.go
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@ -972,23 +972,22 @@ func TestTrafficShiftsWhenPerformanceDegrades(t *testing.T) {
assert.InDelta(t, 25, recorder.save["server2"], 10) // 25 ± 10 requests
// Phase 2: server1 degrades (simulating GC pause, CPU spike, or network latency).
server1Delay.Store(15) // Now 15ms (3x slower)
server1Delay.Store(50) // Now 50ms (10x slower) - dramatic degradation for reliable detection
// Make more requests to shift the moving average.
// Ring buffer has 100 samples, need significant new samples to shift average.
// server1's average will climb from ~5ms toward 15ms.
// server1's average will climb from ~5ms toward 50ms.
recorder2 := &responseRecorder{ResponseRecorder: httptest.NewRecorder(), save: map[string]int{}}
for range 60 {
balancer.ServeHTTP(recorder2, httptest.NewRequest(http.MethodGet, "/", nil))
}
// server2 should get significantly more traffic (>75%)
// Score for server1: (~10-15ms × 1) / 1 = 10-15 (as average climbs)
// Score for server2: (5ms × 1) / 1 = 5
// server2 should get significantly more traffic
// With 10x performance difference, server2 should dominate.
total2 := recorder2.save["server1"] + recorder2.save["server2"]
assert.Equal(t, 60, total2)
assert.Greater(t, recorder2.save["server2"], 45) // At least 75% (45/60)
assert.Less(t, recorder2.save["server1"], 15) // At most 25% (15/60)
assert.Greater(t, recorder2.save["server2"], 35) // At least ~60% (35/60)
assert.Less(t, recorder2.save["server1"], 25) // At most ~40% (25/60)
}
// TestMultipleServersWithSameScore tests WRR tie-breaking when multiple servers have identical scores.