Observability

Every chaos decision emits a ChaosEvent.

type ChaosEvent = {
  type: string;
  timestamp: number;
  applied: boolean;
  detail: Record<string, unknown>;
};

Use the adapter log helpers to assert that chaos happened and to diagnose skipped decisions.

const log = await getChaosLog(page);
expect(log.some((event) => event.type === 'network:failure' && event.applied)).toBe(true);

Seeds

Always log getChaosSeed() when a test fails. The seed plus the chaos log gives you the repro input and the observed decision sequence.

Playwright traces

The Playwright adapter can add chaos events to the trace viewer and attach chaos-log.json at test end.