abdulive/apps/ingest/src/spike.test.ts

import { test } from 'node:test';
import assert from 'node:assert/strict';
import type { ChatMessage } from '#shared/events.ts';
import { createSpikeDetector, type SpikeConfig } from './spike.ts';

const CFG: SpikeConfig = {
  windowSeconds: 15,
  baselineMinutes: 10,
  factor: 3,
  minDelta: 4,
  cooldownSeconds: 60,
  armed: false,
  laughEmotes: ['KEKW', 'LUL'],
};

let clock = Date.parse('2026-09-09T20:00:00.000Z');

function msg(text: string, userId: string, advanceMs = 0): ChatMessage {
  clock += advanceMs;
  return {
    id: `m${clock}-${userId}`, ts: new Date(clock).toISOString(), userId,
    login: `u${userId}`, displayName: `U${userId}`, text, emotes: [], gifs: [],
    isFirst: false, isReturning: false, isCommand: text.startsWith('!'),
    isMod: false, isSub: false, isBroadcaster: false, bits: 0, color: null,
  };
}

test('ruhiger Chat erzeugt keinen Kandidaten', () => {
  clock = Date.parse('2026-09-09T20:00:00.000Z');
  const d = createSpikeDetector(CFG);
  let hits = 0;
  // Eine Nachricht alle 20 s - das Fenster ist nie voller als eine
  for (let i = 0; i < 30; i++) if (d.push(msg('hi', String(i % 4), 20_000))) hits++;
  assert.equal(hits, 0);
});

test('ploetzlicher Ausbruch von mehreren Leuten wird erkannt', () => {
  clock = Date.parse('2026-09-09T20:00:00.000Z');
  const d = createSpikeDetector(CFG);
  for (let i = 0; i < 30; i++) d.push(msg('ruhig', String(i % 3), 20_000));

  let spike = null;
  for (let i = 0; i < 8 && !spike; i++) spike = d.push(msg('KEKW', `x${i}`, 300));
  assert.ok(spike, 'Ausbruch haette einen Kandidaten liefern muessen');
  assert.ok(spike.chatters >= 4, `zu wenig verschiedene Chatter: ${spike.chatters}`);
  assert.ok(spike.emoteHits > 0, 'Lach-Emotes wurden nicht gezaehlt');
  assert.equal(spike.overThreshold, false, 'armed=false darf nicht ausloesen');
});

test('Vielschreiber allein erzeugt weniger Punkte als eine Gruppe', () => {
  const run = (users: string[]) => {
    clock = Date.parse('2026-09-09T20:00:00.000Z');
    const d = createSpikeDetector(CFG);
    for (let i = 0; i < 30; i++) d.push(msg('ruhig', 'base', 20_000));
    let spike = null;
    for (let i = 0; i < 10 && !spike; i++) spike = d.push(msg('hahaha', users[i % users.length]!, 300));
    return spike;
  };
  const solo = run(['einer']);
  const gruppe = run(['a', 'b', 'c', 'd', 'e']);
  assert.ok(solo && gruppe);
  assert.ok(gruppe.score > solo.score,
    `Gruppe (${gruppe.score}) muss hoeher liegen als Einzelperson (${solo.score})`);
});

test('das Wort clip zaehlt stark', () => {
  clock = Date.parse('2026-09-09T20:00:00.000Z');
  const d = createSpikeDetector(CFG);
  for (let i = 0; i < 30; i++) d.push(msg('ruhig', String(i % 3), 20_000));
  let spike = null;
  for (let i = 0; i < 8 && !spike; i++) spike = d.push(msg('das war ein CLIP wert', `y${i}`, 300));
  assert.ok(spike);
  assert.ok(spike.clipMentions >= 4, `clip-Erwaehnungen: ${spike.clipMentions}`);
});

test('Abklingzeit verhindert Kandidaten im Sekundentakt', () => {
  clock = Date.parse('2026-09-09T20:00:00.000Z');
  const d = createSpikeDetector(CFG);
  for (let i = 0; i < 30; i++) d.push(msg('ruhig', String(i % 3), 20_000));
  let hits = 0;
  for (let i = 0; i < 60; i++) if (d.push(msg('KEKW', `z${i}`, 500))) hits++;
  // 60 Nachrichten in 30 s: ohne Abklingzeit waeren das viele Kandidaten
  assert.ok(hits <= 1, `Abklingzeit greift nicht, ${hits} Kandidaten`);
});