106 lines
3.3 KiB
JavaScript
106 lines
3.3 KiB
JavaScript
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/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @emails oncall+javascript_foundation
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* @flow
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* @format
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*/
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'use strict';
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/* eslint-disable no-unclear-flowtypes */
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declare var jest: any;
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declare var describe: any;
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declare var beforeEach: any;
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declare var expect: any;
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declare var it: any;
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jest.mock('fs');
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const fs = require('fs');
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describe('fs mock', () => {
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beforeEach(() => {
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(fs: $FlowFixMe).mock.clear();
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});
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describe('writeFileSync()', () => {
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it('stores content correctly', () => {
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fs.writeFileSync('/test', 'foobar', 'utf8');
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const content = fs.readFileSync('/test', 'utf8');
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/* $FlowFixMe(>=0.56.0 site=react_native_oss) This comment suppresses an
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* error found when Flow v0.56 was deployed. To see the error delete this
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* comment and run Flow. */
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expect(content).toEqual('foobar');
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});
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it('fails on missing path', () => {
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/* $FlowFixMe(>=0.56.0 site=react_native_oss) This comment suppresses an
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* error found when Flow v0.56 was deployed. To see the error delete this
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* comment and run Flow. */
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expect(() =>
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fs.writeFileSync('/dir/test', 'foobar', 'utf8'),
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).toThrowError('ENOENT: no such file or directory');
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});
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it('properly normalizes paths', () => {
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fs.writeFileSync('/test/foo/../bar/../../tadam', 'beep', 'utf8');
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const content = fs.readFileSync('/glo/../tadam', 'utf8');
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expect(content).toEqual('beep');
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});
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});
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describe('mkdirSync()', () => {
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it('creates folders that we can write files in', () => {
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fs.mkdirSync('/dir', 0o777);
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fs.writeFileSync('/dir/test', 'foobar', 'utf8');
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const content = fs.readFileSync('/dir/test', 'utf8');
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/* $FlowFixMe(>=0.56.0 site=react_native_oss) This comment suppresses an
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* error found when Flow v0.56 was deployed. To see the error delete this
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* comment and run Flow. */
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expect(content).toEqual('foobar');
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});
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it('does not erase directories', () => {
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fs.mkdirSync('/dir', 0o777);
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fs.writeFileSync('/dir/test', 'foobar', 'utf8');
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fs.mkdirSync('/dir', 0o777);
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const content = fs.readFileSync('/dir/test', 'utf8');
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/* $FlowFixMe(>=0.56.0 site=react_native_oss) This comment suppresses an
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* error found when Flow v0.56 was deployed. To see the error delete this
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* comment and run Flow. */
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expect(content).toEqual('foobar');
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});
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});
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describe('createWriteStream()', () => {
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it('writes content', done => {
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const stream = fs.createWriteStream('/test');
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stream.write('hello, ');
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stream.write('world');
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stream.end('!');
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process.nextTick(() => {
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const content = fs.readFileSync('/test', 'utf8');
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expect(content).toEqual('hello, world!');
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done();
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});
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});
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});
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describe('writeSync()', () => {
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it('writes content', () => {
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const fd = fs.openSync('/test', 'w');
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fs.writeSync(fd, 'hello, world!');
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fs.closeSync(fd);
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const content = fs.readFileSync('/test', 'utf8');
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expect(content).toEqual('hello, world!');
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});
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});
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});
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