Vscode-jest: I need to run jest with a specific TZ

[capaj]

this extension has almost all the features I need. Only thing lacking is ability to run jest with a custom ENV vars.
I run my jest with TZ=UTC so that my snapshot tests match the ones on our build server. Is there any way to resolve this? Is it something I could potentially open as a PR? It would be trivial to add a single config just for passing ENV variables.

[orta]

Could you use jest's setup script to set the process env?

On Oct 8, 2017 06:26, "Jiri Spac" [e-mail] wrote:

this extension has almost all the features I need. Only thing lacking is
ability to run jest with a custom ENV vars.
I run my jest with TZ=UTC so that my snapshot tests match the ones on our
build server. Is there any way to resolve this? Is it something I could
potentially open as a PR? It would be trivial to add a single config just
for passing ENV variables.

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[Marinolinderhof]

can you set a process env in jest config?
As a workaround i added
export TZ=UTC in my ~/.bash_profile

Hopefully we can do this per workspace.

Cheers for the extension really helpful

[orta]

I mean using this setting in jest for that specific test suite to run something like

process.TZ = "UTC"

Before every tests suite.

[capaj]

@orta not sure if it's going to work- I think at that time all the child processes are already forked so they aren't started with the time in UTC. I tried it like a year ago. Will try again.

[connectdotz]

or jest's config globals...

A set of global variables that need to be available in all test environments.

you can use different jest.config file for different test setting, either use vscode-jest setting jest.pathToConfig or simply pass the config file in cli via jest.pathToJest, for example, node_modules/.bin/jest --config=utc-jest.js

it's best to utilize jest mechanism, not only it keeps vscode-jest light and clean but also enables you to run your test independent of vscode, especially when you consider running them later in any ci environments or automatic batch testing...

[jcollum-nike]

I was curious about this today and added

  globals: {
    TZ: 'utc',
  },

to my jest.config.js.

It didn't work. What's the solution these days? I'm in 24.5.0.

[soorajshankar]

Try this before describe in your test
const moment = require.requireActual('moment-timezone').tz.setDefault('America/Los_Angeles');

[jcollum]

Would that work if I don't use moment?

[igorbarbashin]

Prepended jest scripts with TZ=UTC in package.json. Works great!

    . . .
    "test": "TZ=UTC jest --coverage",
    "test:watch": "TZ=UTC jest --watchAll",
    . . .

[joetidee]

https://stackoverflow.com/questions/56261381/how-do-i-set-a-timezone-in-my-jest-config

[avindra]

Pure Jest only solution (no need to modify scripts in package.json)

globalSetup.js

export default () => {
  process.env.TZ = 'UTC';
}

package.json

{

  "jest": {
      "globalSetup": "<rootDir>/globalSetup.js",

  }

}

EDIT: as @jcollum mentioned, it's the same solution that @joetidee linked to: https://stackoverflow.com/a/56482581/270302

[jcollum]

Same answer as here:
https://stackoverflow.com/questions/56261381/how-do-i-set-a-timezone-in-my-jest-config

On Fri, Oct 18, 2019 at 9:12 AM Avindra Goolcharan [e-mail]
wrote:

Pure Jest only solution (no need to modify scripts in package.json)

globalSetup.js

export default () => {
process.env.TZ = 'UTC';
}

package.json

{

"jest": {
"globalSetup": "/globalSetup.ts",

}

}

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[CanKattwinkel]

@avindra I am the author of the SO, you should add to your solution that it does not work on Windows