jestjs/jest

Expose project matching behaviour

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#11 171 ouverte le 8 mars 2021

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Description

🚀 Feature Proposal

Expose the logic that determines what project a file belongs to. Given a file path and a Jest configuration, what options apply?

Motivation

To allow third-party tools to understand Jest configurations. E.g: https://github.com/jest-community/eslint-plugin-jest/pull/754#issuecomment-780396777

Example

I am not sure what package this logic currently resides in, but something along the lines of:

import { resolveOptions } from '@jest/options';
import { readConfig } from '@jest/config';

const config = await readConfig('/path/to/jest.config.js');
const options = await resolveOptions('/path/to/unit.test.js', config);

Pitch

The projects logic is very specific to Jest, and recreating it externally would likely be erroneous and fall out-of-date quickly.

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