TypeError: require(...) is not a function after upgrade

[jasperblues]

Do you want to request a feature or report a bug?

Potential bug.

What is the current behavior?

Jest @21.2.1, I am able to execute tests without issues.
Jest @latest, results in:

TypeError: require(...) is not a function
    at /Users/jblues/vampr/vend_node/node_modules/jest/node_modules/jest-cli/build/run_jest.js:205:46
    at Generator.next (<anonymous>)
    at step (/Users/jblues/vampr/vend_node/node_modules/jest/node_modules/jest-cli/build/run_jest.js:27:377)
    at /Users/jblues/vampr/vend_node/node_modules/jest/node_modules/jest-cli/build/run_jest.js:27:537
    at <anonymous>

If the current behavior is a bug, please provide the steps to reproduce and
either a repl.it demo through https://repl.it/languages/jest or a minimal
repository on GitHub that we can yarn install and yarn test.

Haven't stripped it down to something that I can share publicly yet.

What is the expected behavior?

Please provide your exact Jest configuration and mention your Jest, node,
yarn/npm version and operating system.

Able to execute tests on latest jest.

[thymikee]

It's probably related to your package manager. Please purge node_modules and try again. Also, we can't action this without a repro.

[jasperblues]

purge of node_modules didn't work. updating from node 8.9.1 to 9.5.0 didn't work either.

appreciate that you can't take action without a repro - will see what i can prepare. in the meantime I wanted to put it on your radar in case it is something that others are experiencing.

thanks.

[jasperblues]

Repro Steps:

Add: globalSetup: "./test/jest.global.setup.js", to jest.config.js

jest.global.setup.js:

console.log('hello from global setup'); 

Removing global setup works. Issue didn't occur on older jet, because global setup is not supported in jest 21.2.1 (which wasn't clear to me from the docs - this is only evident at runtime).

[thymikee]

I'm sorry, but this is not a sufficient repro. We need a repo we can check out to

[jasperblues]

Yes, I'll get to that eventually. Keeping you updated. Please keep this issue closed and I'll open a new one when I have a public repository that reproduces the issue.

Happy to help out! Take care.

[thymikee]

Cool, looking forward to it, and thanks for taking care to make a repro!

[rjhilgefort]

I'm seeing this same issue doing a very similar thing to @jasperblues. My tests run as expected until I add a globalSetup file.

@thymikee I was able to reproduce on a clean/new repo as you requested.

https://github.com/rjhilgefort/facebook-jest-5628

[SimenB]

globalSetup needs to export a function. Why the error handling in this case is so bad, I'm not sure...

EDIT: Oh, since it tries to invoke it :P PR incoming This is a good first issue, actually, so I'll leave it.

The error is here: https://github.com/facebook/jest/blob/124067e7d662364d40fc662ef54bfddd798c57c4/packages/jest-cli/src/run_jest.js#L203-L206

It should do the require first, then do a typeof globalSetup === 'function' and throw a descriptive error otherwise.

Should do the same here: https://github.com/facebook/jest/blob/124067e7d662364d40fc662ef54bfddd798c57c4/packages/jest-cli/src/run_jest.js#L217-L220

[SimenB]

#5835

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