sample_example.ts

/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the Elastic License
 * 2.0; you may not use this file except in compliance with the Elastic License
 * 2.0.
 */

// Put this file at "x-pack/plugins/alerting/server/" and then run it with the copy_tests.sh
// from here: https://gist.github.com/FrankHassanabad/ce8353ae0519cbb2cdf38a9e279da1c9
// so that you can see it leak memory very quickly.

// This does not leak memory. Uncomment this and use this instead of the one above.
// import { parseDuration } from '../common/parse_duration';

// This does leak memory
import { parseDuration } from '.';

describe('memory leak as soon as we pull in and use "parseDuration" from "alerting', () => {
  beforeAll(() => {
    jest.clearAllMocks();
    jest.resetAllMocks();
    jest.restoreAllMocks();
    jest.resetModules();
  });

  beforeEach(() => {
    jest.clearAllMocks();
    jest.resetAllMocks();
    jest.restoreAllMocks();
    jest.resetModules();
    jest.clearAllMocks();
  });

  afterEach(() => {
    jest.clearAllMocks();
    jest.resetAllMocks();
    jest.restoreAllMocks();
    jest.resetModules();
  });

  test('parseDuration', () => {
    if (global.gc) {
      // console.log('I am able to GC...');
      global.gc();
    } else {
      // console.log('I cannot GC...');
    }
    parseDuration('5s');
    expect(true).toEqual(true);
  });
});