jest-get-mocks

Recursively find mocks in your source code for your projects Jest config. Returns a flattened object of absolute (global mocks) and relative path key:value (<module_name>:<mock_function_path> pairs by searching a directory for mock functions. For global mocks, found folders will be recursively searched and treated as scoped modules. For relative mocks, found folders will be recursively searched for __mocks__ folders.

Note: For relative mocks, excludes <rootDir>/src/__mocks__, but includes <rootDir>/src/ ** /__mocks__/ *.

Install

Using NPM

$ npm install --save-dev jest-get-mocks

Using Yarn

$ yarn add --dev jest-get-mocks

Usage

Import the package then apply the results to your moduleNameMapper field in your jest configuration.

const jestGetMocks = require('jest-get-mocks');
const path = require('path');

const mocks = jestGetMocks({
  /** The directory for your global/module mocks (optional). */
  globalMocksDir: path.resolve(__dirname, 'src/__mocks__'),
  /** The project root directory. Typically where your jest.config.js is. */
  rootDir: path.resolve(__dirname),
  /** The projects source directory. */
  srcDir: path.resolve(__dirname, 'src'),
    /**
   * File names to exclude, can be partial names.
   * Defaults to `['spec.js', 'spec.jsx', 'spec.ts', 'spec.tsx', 'snap', 'jest.setup.js', 'jest.setup.ts']`.
   */
  excludeFiles: ['spec.js', 'spec.jsx', 'spec.ts', 'spec.tsx', 'snap', 'jest.setup.js', 'jest.setup.ts'];
  /**
   * An array of file extensions your modules use.
   * Defaults to `['js', 'jsx', 'ts', 'tsx']`;
   */
  moduleFileExtensions: ['js', 'jsx', 'ts', 'tsx'];
});

module.exports = {
  moduleNameMapper: {
    ...mocks,
  },
};

If you run the example in the ./demo folder your moduleNameMapper will look like the following:

module.exports = {
  moduleNameMapper: {
    fs: '<rootDir>/src/__mocks__/fs',
    uuid: '<rootDir>/src/__mocks__/uuid',
    '\\/now$': '<rootDir>/src/utils/__mocks__/now',
  },
};

Contributing

Run, yarn lint && yarn test