react-native/jest/preprocessor.js

83 lines
2.4 KiB
JavaScript

/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* @flow
*/
/* eslint-env node */
'use strict';
/* $FlowFixMe(>=0.54.0 site=react_native_oss) This comment suppresses an error
* found when Flow v0.54 was deployed. To see the error delete this comment and
* run Flow. */
const babel = require('babel-core');
/* $FlowFixMe(>=0.54.0 site=react_native_oss) This comment suppresses an error
* found when Flow v0.54 was deployed. To see the error delete this comment and
* run Flow. */
const babelRegisterOnly = require('metro/src/babelRegisterOnly');
/* $FlowFixMe(>=0.54.0 site=react_native_oss) This comment suppresses an error
* found when Flow v0.54 was deployed. To see the error delete this comment and
* run Flow. */
const createCacheKeyFunction = require('fbjs-scripts/jest/createCacheKeyFunction');
const generate = require('babel-generator').default;
const nodeFiles = RegExp([
'/local-cli/',
'/metro(-bundler)?/',
].join('|'));
const nodeOptions = babelRegisterOnly.config([nodeFiles]);
babelRegisterOnly([]);
/* $FlowFixMe(>=0.54.0 site=react_native_oss) This comment suppresses an error
* found when Flow v0.54 was deployed. To see the error delete this comment and
* run Flow. */
const transformer = require('metro/src/transformer.js');
module.exports = {
process(src/*: string*/, file/*: string*/) {
if (nodeFiles.test(file)) { // node specific transforms only
return babel.transform(
src,
Object.assign({filename: file}, nodeOptions)
).code;
}
const {ast} = transformer.transform({
filename: file,
localPath: file,
options: {
assetDataPlugins: [],
dev: true,
inlineRequires: true,
minify: false,
platform: '',
projectRoot: '',
retainLines: true,
},
src,
});
return generate(ast, {
code: true,
comments: false,
compact: false,
filename: file,
retainLines: true,
sourceFileName: file,
sourceMaps: true,
}, src).code;
},
getCacheKey: createCacheKeyFunction([
__filename,
require.resolve('metro/src/transformer.js'),
require.resolve('babel-core/package.json'),
]),
};