Run individual tests in jsdom or node during the same test run

[SimenB]

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

What is the current behavior?
One has to choose if tests should be run in Node or jsdom (or something else), it is not possible to have some tests run one environment, and some other in another environment

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.
N/A

What is the expected behavior?
To be able to choose, on a file-by-file basis, if the tests should be run in jsdom or node, and have all tests ran within the same command.
Current workaround is to have two separate scripts in package.json, resulting in two separate test runs.

I mentioned this on reactiflux, and was told something like this was wanted:

/**
 * @environment jsdom
 */

So this is at least a tracking issue for it! 😄 I would like to work on this, but I don't know how much work it would entail, or where to begin. I'll have a look this weekend.

Please provide your exact Jest configuration and mention your Jest, node, yarn/npm version and operating system.
Jest v18.1.0, yarn 0.20.0 macOS Sierra

[mathieumg]

#2587

[cpojer]

closing as duplicate.

[github-actions]

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