42 lines
1.4 KiB
Go
42 lines
1.4 KiB
Go
package features
|
|
|
|
import (
|
|
"testing"
|
|
"time"
|
|
)
|
|
|
|
func TestDetectSpikesIgnoresChronicPatterns(t *testing.T) {
|
|
at := time.Date(2026, 9, 19, 12, 0, 0, 0, time.UTC)
|
|
cfg := SpikeConfig{Window: 5 * time.Minute, BaselineWindows: 12}
|
|
var events []Event
|
|
add := func(sig string, n int, when time.Time) {
|
|
for i := 0; i < n; i++ {
|
|
events = append(events, Event{Timestamp: when.Add(time.Duration(i) * time.Second), Service: "api", IsError: true, PatternSignature: sig})
|
|
}
|
|
}
|
|
// chronic poller: 50 errors in every window, including the current one
|
|
for w := 0; w <= 12; w++ {
|
|
add("poll-401", 50, at.Add(-time.Duration(w+1)*cfg.Window))
|
|
}
|
|
if got := DetectSpikes(events, at, cfg); len(got) != 0 {
|
|
t.Fatalf("chronic pattern alone alerted: %+v", got)
|
|
}
|
|
// a novel failure appears in the current window
|
|
add("db-timeout", 20, at.Add(-cfg.Window))
|
|
got := DetectSpikes(events, at, cfg)
|
|
if len(got) != 1 || got[0].Patterns[0].Signature != "db-timeout" || !got[0].Patterns[0].Novel {
|
|
t.Fatalf("expected db-timeout spike, got %+v", got)
|
|
}
|
|
}
|
|
|
|
func TestDetectSpikesRequiresMinimumExcess(t *testing.T) {
|
|
at := time.Date(2026, 9, 19, 12, 0, 0, 0, time.UTC)
|
|
events := []Event{}
|
|
for i := 0; i < 3; i++ {
|
|
events = append(events, Event{Timestamp: at.Add(-time.Minute), Service: "api", IsError: true, PatternSignature: "x"})
|
|
}
|
|
if got := DetectSpikes(events, at, SpikeConfig{}); len(got) != 0 {
|
|
t.Fatalf("3 errors should stay under the floor: %+v", got)
|
|
}
|
|
}
|