Typescript support: Electron is reading the wrong tsconfig.json

[tspmelo]

Current behavior:

In 4.4.0, using the included TypeScript support I cannot run tests in Electron.
Using Chrome still works.

The problem I'm facing seems to be related to the tsconfig.json file I have at the root of my project.
If that file is removed, Electron starts working again.

When I try to run with Electron I'm getting this:

npm run cypress:run

...

====================================================================================================

  (Run Starting)

  ┌────────────────────────────────────────────────────────────────────────────────────────────────┐
  │ Cypress:    4.4.0                                                                              │
  │ Browser:    Electron 80 (headless)                                                             │
  │ Specs:      1 found (spec.ts)                                                                  │
  └────────────────────────────────────────────────────────────────────────────────────────────────┘


────────────────────────────────────────────────────────────────────────────────────────────────────
                                                                                                    
  Running:  spec.ts                                                                         (1 of 1)
Cannot use import statement outside a module
/home/tspmelo/.cache/Cypress/4.4.0/Cypress/resources/app/packages/server/lib/browsers/electron.js:1
import * as tslib_1 from "tslib";
^^^^^^

SyntaxError: Cannot use import statement outside a module
    at Module._compile (internal/modules/cjs/loader.js:896:18)
    at Module.m._compile (/home/tspmelo/.cache/Cypress/4.4.0/Cypress/resources/app/packages/server/node_modules/ts-node/src/index.ts:536:23)
    at Module._extensions..js (internal/modules/cjs/loader.js:986:10)
    at Object.require.extensions.<computed> [as .js] (/home/tspmelo/.cache/Cypress/4.4.0/Cypress/resources/app/packages/server/node_modules/ts-node/src/index.ts:539:12)
    at Module.load (internal/modules/cjs/loader.js:816:32)
    at Module._load (internal/modules/cjs/loader.js:728:14)
    at Module._load (electron/js2c/asar.js:717:26)
    at Function.Module._load (electron/js2c/asar.js:717:26)
    at Module.require (internal/modules/cjs/loader.js:853:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at getBrowserLauncher (/home/tspmelo/.cache/Cypress/4.4.0/Cypress/resources/app/packages/server/lib/browsers/index.js:51:12)
    at /home/tspmelo/.cache/Cypress/4.4.0/Cypress/resources/app/packages/server/lib/browsers/index.js:189:31
    at tryCatcher (/home/tspmelo/.cache/Cypress/4.4.0/Cypress/resources/app/packages/server/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (/home/tspmelo/.cache/Cypress/4.4.0/Cypress/resources/app/packages/server/node_modules/bluebird/js/release/promise.js:547:31)
    at Promise._settlePromise (/home/tspmelo/.cache/Cypress/4.4.0/Cypress/resources/app/packages/server/node_modules/bluebird/js/release/promise.js:604:18)
    at Promise._settlePromiseCtx (/home/tspmelo/.cache/Cypress/4.4.0/Cypress/resources/app/packages/server/node_modules/bluebird/js/release/promise.js:641:10)
    at _drainQueueStep (/home/tspmelo/.cache/Cypress/4.4.0/Cypress/resources/app/packages/server/node_modules/bluebird/js/release/async.js:97:12)
    at _drainQueue (/home/tspmelo/.cache/Cypress/4.4.0/Cypress/resources/app/packages/server/node_modules/bluebird/js/release/async.js:86:9)
    at Async._drainQueues (/home/tspmelo/.cache/Cypress/4.4.0/Cypress/resources/app/packages/server/node_modules/bluebird/js/release/async.js:102:5)
    at Immediate.Async.drainQueues [as _onImmediate] (/home/tspmelo/.cache/Cypress/4.4.0/Cypress/resources/app/packages/server/node_modules/bluebird/js/release/async.js:15:14)
    at processImmediate (internal/timers.js:439:21)

Desired behavior:

• It should work in all browsers.
• Electron should not read tsconfig.json
• Both browsers were working in 4.3.0, using webpack preprocessor.

Test code to reproduce

Before knowing about cypress-test-tiny I created a reproducible example in cypress-example-recipes: tspmelo/cypress-example-recipes@4a310b1
If needed I can move the code to the other repo.
(And if you think it would be a good addition, I can open a working PR in cypress-example-recipes with the example used here)

cd examples/preprocessors__typescript-none
npm run cypress:run  # Will fail
npm run cypress:run -- --browser chrome # Will work

rm tsconfig.json
npm run cypress:run  # Will work

Versions

OS: Linux
Cypress 4.4.0
Browsers:
- Electron: 80
- Chrome: 80

[jennifer-shehane]

I can recreate this. Have a cypress project with typescript installed in Cypress 4.4.0 and add the following tsconfig.json to the root of the project then run cypress run.

{
  "compilerOptions": {
    "importHelpers": true,
    "module": "esnext",
    "target": "es2015",
    "allowJs": true
  }
}

Fails only in Electron with following stacktrace

 cypress run

====================================================================================================

  (Run Starting)

  ┌────────────────────────────────────────────────────────────────────────────────────────────────┐
  │ Cypress:    4.4.0                                                                              │
  │ Browser:    Electron 80 (headless)                                                             │
  │ Specs:      1 found (spec.js)                                                                  │
  └────────────────────────────────────────────────────────────────────────────────────────────────┘


────────────────────────────────────────────────────────────────────────────────────────────────────

  Running:  spec.js                                                                         (1 of 1)
Cannot use import statement outside a module
/Users/jennifer/Library/Caches/Cypress/4.4.0/Cypress.app/Contents/Resources/app/packages/server/lib/browsers/electron.js:1
import { __awaiter } from "tslib";
^^^^^^

SyntaxError: Cannot use import statement outside a module
    at Module._compile (internal/modules/cjs/loader.js:896:18)
    at Module.m._compile (/Users/jennifer/Library/Caches/Cypress/4.4.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/ts-node/src/index.ts:536:23)
    at Module._extensions..js (internal/modules/cjs/loader.js:986:10)
    at Object.require.extensions.<computed> [as .js] (/Users/jennifer/Library/Caches/Cypress/4.4.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/ts-node/src/index.ts:539:12)
    at Module.load (internal/modules/cjs/loader.js:816:32)
    at Module._load (internal/modules/cjs/loader.js:728:14)
    at Module._load (electron/js2c/asar.js:717:26)
    at Function.Module._load (electron/js2c/asar.js:717:26)
    at Module.require (internal/modules/cjs/loader.js:853:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at getBrowserLauncher (/Users/jennifer/Library/Caches/Cypress/4.4.0/Cypress.app/Contents/Resources/app/packages/server/lib/browsers/index.js:51:12)
    at /Users/jennifer/Library/Caches/Cypress/4.4.0/Cypress.app/Contents/Resources/app/packages/server/lib/browsers/index.js:189:31
    at tryCatcher (/Users/jennifer/Library/Caches/Cypress/4.4.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (/Users/jennifer/Library/Caches/Cypress/4.4.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/promise.js:547:31)
    at Promise._settlePromise (/Users/jennifer/Library/Caches/Cypress/4.4.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/promise.js:604:18)
    at Promise._settlePromiseCtx (/Users/jennifer/Library/Caches/Cypress/4.4.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/promise.js:641:10)
    at _drainQueueStep (/Users/jennifer/Library/Caches/Cypress/4.4.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/async.js:97:12)
    at _drainQueue (/Users/jennifer/Library/Caches/Cypress/4.4.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/async.js:86:9)
    at Async._drainQueues (/Users/jennifer/Library/Caches/Cypress/4.4.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/async.js:102:5)
    at Immediate.Async.drainQueues [as _onImmediate] (/Users/jennifer/Library/Caches/Cypress/4.4.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/async.js:15:14)
    at processImmediate (internal/timers.js:439:21)

[izayl]

@jennifer-shehane any progress here? Cypress 4.5.0 have the same issue.

[zetoke]

@izayl +1
And It's not only Electron related.
People in other set ups are also having the same problems with importing helpers #7011 (comment)

[cypress-bot]

The code for this is done in cypress-io/cypress#7197, but has yet to be released.
We'll update this issue and reference the changelog when it's released.

[cypress-bot]

Released in 4.6.0.

This comment thread has been locked. If you are still experiencing this issue after upgrading to
Cypress v4.6.0, please open a new issue.