[jest] Expose Config type (#12848)
[@jest/reporters] Improve GitHubActionsReporters annotation format (#12826)
[@jest/types] Infer argument types passed to test and describe callback functions from each tables (#12885, #12905)

Fixes

[@jest/expect-utils] Fix deep equality of ImmutableJS OrderedMaps (#12899)
[jest-docblock] Handle multiline comments in parseWithComments (#12845)
[jest-mock] Improve spyOn error messages (#12901)
[jest-runtime] Correctly report V8 coverage with resetModules: true (#12912)
[jest-worker] Make JestWorkerFarm helper type to include methods of worker module that take more than one argument (#12839)

Chore & Maintenance

[docs] Updated docs to indicate that jest-environment-jsdom is a separate package #12828
[docs] Document the comments used by coverage providers #12835
[docs] Use docusaurus-remark-plugin-tab-blocks to format tabs with code examples (#12859)
[jest-haste-map] Bump walker version (#12324)

Readme

Source

jest-leak-detector

Module for verifying whether an object has been garbage collected or not.

Internally creates a weak reference to the object, and forces garbage collection to happen. If the reference is gone, it meant no one else was pointing to the object.

Example

(async function () {
  let reference = {};
  let isLeaking;

  const detector = new LeakDetector(reference);

  // Reference is held in memory.
  isLeaking = await detector.isLeaking();
  console.log(isLeaking); // true

  // We destroy the only reference to the object.
  reference = null;

  // Reference is gone.
  isLeaking = await detector.isLeaking();
  console.log(isLeaking); // false
})();

FAQs

What is jest-leak-detector?

Is jest-leak-detector well maintained?

Last updated on 07 Jun 2022

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