Programmatic API

[pauldraper]

🚀 Feature Proposal

Run jest programmatically, similar to jsunit, mocha, jasmine, etc. JS APIs.

Motivation

I want to integrate Jest with a build tools/test runner (Bazel). That manages compilation, parallelism, workers, file watching, aggregating test reports, etc. (no knock on Jest, but JS is not the only language that needs these, and a consistent tool is nice).

That leaves me needing way to (1) run Jest tests for a file and collect the results, and (2) a way to update snapshots.

Example

await runTests('./example.js', { reporters });

Pitch

Prior work: #7696

There's no documentation, but as far as I can tell, the API is still very much reading config files from disk.

[pauldraper]

Looks like a dupe of #5048

[github-actions]

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