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import { Either, Signals } from '../lib/index';
import { CollectingTrace, TestTraceable } from './test_utils';
describe('process/signals (Signals.awaitClose)', () => {
const originalOn = process.on;
afterEach(() => {
// restore in case a test fails mid-way
(process.on as any) = originalOn;
jest.restoreAllMocks();
});
test('resolves right on SIGINT with no error', async () => {
const handlers: Record<string, () => void> = {};
jest.spyOn(process, 'on').mockImplementation(((evt: string, cb: () => void) => {
handlers[evt] = cb;
return process;
}) as any);
const close = jest.fn((cb: (err: Error | undefined) => void) => cb(undefined));
const trace = new CollectingTrace<any>();
const t = TestTraceable.of({ close }, trace);
const p = Signals.awaitClose(t);
handlers.SIGINT();
const res = await p;
expect(res.left().present()).toBe(false);
expect(close).toHaveBeenCalledTimes(1);
const flattened = trace.events.flatMap((e) => e);
expect(flattened).toEqual(expect.arrayContaining(['closing', 'finished']));
});
test('resolves left on SIGTERM with error', async () => {
const handlers: Record<string, () => void> = {};
jest.spyOn(process, 'on').mockImplementation(((evt: string, cb: () => void) => {
handlers[evt] = cb;
return process;
}) as any);
const close = jest.fn((cb: (err: Error | undefined) => void) => cb(new Error('boom')));
const trace = new CollectingTrace<any>();
const t = TestTraceable.of({ close }, trace);
const p = Signals.awaitClose(t);
handlers.SIGTERM();
const res = await p;
expect(res.left().get().message).toBe('boom');
expect(close).toHaveBeenCalledTimes(1);
});
test('close callback is optional error', async () => {
const handlers: Record<string, () => void> = {};
jest.spyOn(process, 'on').mockImplementation(((evt: string, cb: () => void) => {
handlers[evt] = cb;
return process;
}) as any);
const close = jest.fn((cb: (err: Error | undefined) => void) => cb(undefined));
const t = TestTraceable.of({ close }, new CollectingTrace<any>());
const p = Signals.awaitClose(t);
handlers.SIGINT();
const res = await p;
expect(res).toEqual(Either.right(undefined));
});
});
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