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zone.js fails to patch mocha v8.3.1 and up

See original GitHub issue

Which @angular/* package(s) are the source of the bug?

Don’t known / other

Is this a regression?

Description

I’ve created a fresh Angular 12 project with the CLI, refactored tests to use Mocha instead of Jasmine and the tests failed.

Clone the repo and run npm test - everything will work fine
Open package.json and set the mocha dependency to 8.3.1 or higher, then run npm test again
You’ll now get the exception below.

Please provide a link to a minimal reproduction of the bug

https://github.com/Alorel/zone.js-mocha-patch-bug-reproduction

Please provide the exception or error you saw

RangeError: Maximum call stack size exceeded
      at wrapTestInZone (http://localhost:9876/_karma_webpack_/webpack:/node_modules/zone.js/fesm2015/zone-testing.js:1024:1)
      at global.beforeEach.global.setup.Mocha.beforeEach (http://localhost:9876/_karma_webpack_/webpack:/node_modules/zone.js/fesm2015/zone-testing.js:1077:1)
      at exports.beforeEach (node_modules/mocha/mocha.js:28402:65)
      at global.beforeEach.global.setup.Mocha.beforeEach (http://localhost:9876/_karma_webpack_/webpack:/node_modules/zone.js/fesm2015/zone-testing.js:1077:1)
      at exports.beforeEach (node_modules/mocha/mocha.js:28402:65)
      at global.beforeEach.global.setup.Mocha.beforeEach (http://localhost:9876/_karma_webpack_/webpack:/node_modules/zone.js/fesm2015/zone-testing.js:1077:1)
      at exports.beforeEach (node_modules/mocha/mocha.js:28402:65)
      at global.beforeEach.global.setup.Mocha.beforeEach (http://localhost:9876/_karma_webpack_/webpack:/node_modules/zone.js/fesm2015/zone-testing.js:1077:1)
      at exports.beforeEach (node_modules/mocha/mocha.js:28402:65)
      at global.beforeEach.global.setup.Mocha.beforeEach (http://localhost:9876/_karma_webpack_/webpack:/node_modules/zone.js/fesm2015/zone-testing.js:1077:1)

Please provide the environment you discovered this bug in

Angular CLI: 12.1.1
Node: 14.16.1
Package Manager: npm 7.11.2
OS: linux x64

Angular: 12.1.1
... animations, cli, common, compiler, compiler-cli, core, forms
... platform-browser, platform-browser-dynamic, router

Package                         Version
---------------------------------------------------------
@angular-devkit/architect       0.1201.1
@angular-devkit/build-angular   12.1.1
@angular-devkit/core            12.1.1
@angular-devkit/schematics      12.1.1
@schematics/angular             12.1.1
rxjs                            6.6.7
typescript                      4.3.5

Anything else?

The zone.js version is 0.11.4. The same happens on Angular 11 and zone 0.11.3

Issue Analytics

State:
Created 2 years ago
Reactions:10
Comments:9 (3 by maintainers)

Top GitHub Comments

4reactions

crfrolikcommented, Oct 28, 2021

Would it be possible to get this prioritized? It will impact anyone using Mocha with Angular unit tests.

3reactions

JiaLiPassioncommented, Feb 18, 2022

@juergba , I am not sure about the release schedule, I will plan to cut a new release after several other issues of zone.js are fixed.

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