62 строки
1.4 KiB
JavaScript
62 строки
1.4 KiB
JavaScript
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @format
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*/
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'use strict';
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const path = require('path');
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const MemoryFS = require('metro-memory-fs');
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let fs;
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function setMockFilesystem(object, platform) {
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reset(platform);
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const root = platform === 'win32' ? 'c:\\' : '/';
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mockDir(root, {...object});
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return root;
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}
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function mockDir(dirPath, desc) {
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for (const entName in desc) {
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const ent = desc[entName];
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const entPath = path.join(dirPath, entName);
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if (typeof ent === 'string' || ent instanceof Buffer) {
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fs.writeFileSync(entPath, ent);
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continue;
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}
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if (typeof ent !== 'object') {
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throw new Error(require('util').format('invalid entity:', ent));
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}
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if (ent.SYMLINK != null) {
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fs.symlinkSync(ent.SYMLINK, entPath);
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continue;
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}
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fs.mkdirSync(entPath);
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mockDir(entPath, ent);
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}
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}
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function reset(platform) {
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if (path.mock == null) {
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throw new Error(
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'to use this "fs" module mock, you must also mock the "path" module',
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);
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}
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path.mock.reset(platform);
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const cwd = () => (platform === 'win32' ? 'c:\\' : '/');
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fs = new MemoryFS({platform, cwd});
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Object.assign(mockFs, fs);
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}
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const mockFs = {};
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mockFs.__setMockFilesystem = setMockFilesystem;
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mockFs.mock = {clear: reset};
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reset('posix');
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module.exports = mockFs;
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