mirror of https://github.com/status-im/metro.git
metro: remove fs mock completely
Reviewed By: mjesun Differential Revision: D7627213 fbshipit-source-id: cc68b46ef93e2da78d34f1561b2c65a5f1682b06
This commit is contained in:
Jean Lauliac
Facebook Github Bot
parent
ef7c0a869d
commit
9922584f45
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@ -1,320 +0,0 @@
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/**
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* Copyright (c) 2015-present, Facebook, Inc.
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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 {EventEmitter} = require('events');
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const {dirname} = require.requireActual('path');
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const fs = jest.genMockFromModule('fs');
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const path = require('path');
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const stream = require.requireActual('stream');
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const noop = () => {};
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function asyncCallback(cb) {
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return function() {
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setImmediate(() => cb.apply(this, arguments));
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};
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}
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const mtime = {
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getTime: () => Math.ceil(Math.random() * 10000000),
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};
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fs.realpath.mockImplementation((filepath, callback) => {
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callback = asyncCallback(callback);
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let node;
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try {
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node = getToNode(filepath);
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} catch (e) {
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return callback(e);
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}
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if (node && typeof node === 'object' && node.SYMLINK != null) {
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return callback(null, node.SYMLINK);
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}
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return callback(null, filepath);
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});
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fs.readdirSync.mockImplementation(filepath => Object.keys(getToNode(filepath)));
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fs.readdir.mockImplementation((filepath, callback) => {
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callback = asyncCallback(callback);
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let node;
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try {
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node = getToNode(filepath);
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if (node && typeof node === 'object' && node.SYMLINK != null) {
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node = getToNode(node.SYMLINK);
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}
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} catch (e) {
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return callback(e);
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}
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if (!(node && typeof node === 'object' && node.SYMLINK == null)) {
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return callback(new Error(filepath + ' is not a directory.'));
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}
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return callback(null, Object.keys(node));
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});
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fs.readFile.mockImplementation(function(filepath, encoding, callback) {
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callback = asyncCallback(callback);
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if (arguments.length === 2) {
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callback = encoding;
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encoding = null;
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}
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let node;
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try {
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node = getToNode(filepath);
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// dir check
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if (node && typeof node === 'object' && node.SYMLINK == null) {
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callback(new Error('Error readFile a dir: ' + filepath));
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}
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if (node == null) {
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return callback(Error('No such file: ' + filepath));
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} else {
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return callback(null, node);
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}
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} catch (e) {
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return callback(e);
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}
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});
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fs.readFileSync.mockImplementation(function(filepath, encoding) {
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const node = getToNode(filepath);
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// dir check
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if (node && typeof node === 'object' && node.SYMLINK == null) {
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throw new Error('Error readFileSync a dir: ' + filepath);
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}
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return node;
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});
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function makeStatResult(node) {
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const isSymlink = node != null && node.SYMLINK != null;
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return {
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isBlockDevice: () => false,
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isCharacterDevice: () => false,
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isDirectory: () => node != null && typeof node === 'object' && !isSymlink,
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isFIFO: () => false,
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isFile: () => node != null && typeof node === 'string',
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isSocket: () => false,
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isSymbolicLink: () => isSymlink,
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mtime,
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};
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}
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function statSync(filepath) {
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const node = getToNode(filepath);
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if (node != null && node.SYMLINK) {
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return statSync(node.SYMLINK);
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}
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return makeStatResult(node);
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}
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fs.stat.mockImplementation((filepath, callback) => {
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callback = asyncCallback(callback);
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let result;
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try {
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result = statSync(filepath);
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} catch (e) {
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callback(e);
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return;
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}
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callback(null, result);
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});
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fs.statSync.mockImplementation(statSync);
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function lstatSync(filepath) {
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const node = getToNode(filepath);
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return makeStatResult(node);
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}
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fs.lstat.mockImplementation((filepath, callback) => {
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callback = asyncCallback(callback);
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let result;
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try {
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result = lstatSync(filepath);
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} catch (e) {
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callback(e);
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return;
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}
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callback(null, result);
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});
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fs.lstatSync.mockImplementation(lstatSync);
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fs.open.mockImplementation(function(filepath) {
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const callback = arguments[arguments.length - 1] || noop;
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let data, error, fd;
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try {
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data = getToNode(filepath);
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} catch (e) {
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error = e;
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}
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if (error || data == null) {
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error = Error(`ENOENT: no such file or directory, open ${filepath}`);
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}
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if (data != null) {
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/* global Buffer: true */
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fd = {buffer: new Buffer(data, 'utf8'), position: 0};
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}
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callback(error, fd);
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});
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fs.read.mockImplementation(
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(fd, buffer, writeOffset, length, position, callback = noop) => {
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let bytesWritten;
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try {
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if (position == null || position < 0) {
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({position} = fd);
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}
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bytesWritten = fd.buffer.copy(
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buffer,
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writeOffset,
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position,
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position + length,
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);
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fd.position = position + bytesWritten;
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} catch (e) {
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callback(Error('invalid argument'));
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return;
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}
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callback(null, bytesWritten, buffer);
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},
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);
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fs.close.mockImplementation((fd, callback = noop) => {
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try {
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fd.buffer = fs.position = undefined;
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} catch (e) {
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callback(Error('invalid argument'));
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return;
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}
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callback(null);
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});
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let filesystem;
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fs.createReadStream.mockImplementation(filepath => {
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if (!filepath.startsWith('/')) {
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throw Error('Cannot open file ' + filepath);
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}
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const parts = filepath.split('/').slice(1);
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let file = filesystem;
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for (const part of parts) {
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file = file[part];
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if (!file) {
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break;
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}
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}
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if (typeof file !== 'string') {
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throw Error('Cannot open file ' + filepath);
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}
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return new stream.Readable({
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read() {
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this.push(file, 'utf8');
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this.push(null);
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},
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});
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});
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fs.createWriteStream.mockImplementation(file => {
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let node;
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try {
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node = getToNode(dirname(file));
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} finally {
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if (typeof node === 'object') {
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const writeStream = new stream.Writable({
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write(chunk) {
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this.__chunks.push(chunk);
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},
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});
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writeStream.__file = file;
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writeStream.__chunks = [];
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writeStream.end = jest.fn(writeStream.end);
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fs.createWriteStream.mock.returned.push(writeStream);
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return writeStream;
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} else {
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throw new Error('Cannot open file ' + file);
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}
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}
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});
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fs.createWriteStream.mock.returned = [];
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fs.__setMockFilesystem = object => (filesystem = object);
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const watcherListByPath = new Map();
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fs.watch.mockImplementation((filename, options, listener) => {
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if (options.recursive) {
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throw new Error('recursive watch not implemented');
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}
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let watcherList = watcherListByPath.get(filename);
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if (watcherList == null) {
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watcherList = [];
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watcherListByPath.set(filename, watcherList);
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}
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const fsWatcher = new EventEmitter();
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fsWatcher.on('change', listener);
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fsWatcher.close = () => {
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watcherList.splice(watcherList.indexOf(fsWatcher), 1);
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fsWatcher.close = () => {
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throw new Error('FSWatcher is already closed');
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};
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};
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watcherList.push(fsWatcher);
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});
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fs.__triggerWatchEvent = (eventType, filename) => {
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const directWatchers = watcherListByPath.get(filename) || [];
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directWatchers.forEach(wtc => wtc.emit('change', eventType));
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const dirPath = path.dirname(filename);
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const dirWatchers = watcherListByPath.get(dirPath) || [];
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dirWatchers.forEach(wtc =>
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wtc.emit('change', eventType, path.relative(dirPath, filename)),
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);
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};
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function getToNode(filepath) {
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// Ignore the drive for Windows paths.
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if (filepath.match(/^[a-zA-Z]:\\/)) {
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filepath = filepath.substring(2);
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}
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if (filepath.endsWith(path.sep)) {
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filepath = filepath.slice(0, -1);
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}
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const parts = filepath.split(/[\/\\]/);
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if (parts[0] !== '') {
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throw new Error('Make sure all paths are absolute.');
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}
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let node = filesystem;
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parts.slice(1).forEach(part => {
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if (node && node.SYMLINK) {
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node = getToNode(node.SYMLINK);
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}
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node = node[part];
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if (node == null) {
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const err = new Error('ENOENT: no such file or directory');
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err.code = 'ENOENT';
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throw err;
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}
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});
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return node;
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}
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module.exports = fs;
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@ -10,4 +10,4 @@
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'use strict';
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module.exports = require('./fs');
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module.exports = require('fs');
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@ -10,7 +10,9 @@
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'use strict';
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jest.mock('fs').mock('../../lib/TransformCaching');
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jest
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.mock('fs', () => new (require('metro-memory-fs'))())
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.mock('../../lib/TransformCaching');
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const AssetModule = require('../AssetModule');
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const DependencyGraphHelpers = require('../DependencyGraph/DependencyGraphHelpers');
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@ -22,7 +24,9 @@ describe('AssetModule:', () => {
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const defaults = {file: '/arbitrary.png'};
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beforeEach(() => {
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fs.__setMockFilesystem({root: {'image.png': 'png data'}});
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fs.reset();
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fs.mkdirSync('/root');
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fs.writeFileSync('/root/image.png', 'png data');
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});
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it('is an asset', () => {
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@ -11,7 +11,7 @@
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'use strict';
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jest
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.mock('fs')
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.mock('fs', () => new (require('metro-memory-fs'))())
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.mock('graceful-fs')
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.mock('../ModuleCache')
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.mock('../DependencyGraph/DependencyGraphHelpers')
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@ -29,16 +29,16 @@ const packageJson = JSON.stringify({
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description: "A require('foo') story",
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});
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function mockFS(rootChildren) {
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fs.__setMockFilesystem({root: rootChildren});
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}
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function mockPackageFile() {
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mockFS({'package.json': packageJson});
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fs.reset();
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fs.mkdirSync('/root');
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fs.writeFileSync('/root/package.json', packageJson);
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}
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function mockIndexFile(indexJs) {
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mockFS({'index.js': indexJs});
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fs.reset();
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fs.mkdirSync('/root');
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fs.writeFileSync('/root/index.js', indexJs);
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}
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describe('Module', () => {
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