runtime_module_directories.test.js

/**
 * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 */

'use strict';

const path = require('path');

const moduleDirectories = ['module_dir'];

let createRuntime;
let rootDir;

describe('Runtime', () => {
  beforeEach(() => {
    rootDir = path.resolve(path.dirname(__filename), 'test_root');
    createRuntime = require('createRuntime');
  });

  it('uses configured moduleDirectories', () =>
    createRuntime(__filename, {
      moduleDirectories,
    }).then(runtime => {
      const exports = runtime.requireModule(
        runtime.__mockRootPath,
        'module_dir_module',
      );
      expect(exports).toBeDefined();
    }));

  it('resolves packages', () =>
    createRuntime(__filename, {
      moduleDirectories,
    }).then(runtime => {
      const exports = runtime.requireModule(
        runtime.__mockRootPath,
        'my-module',
      );
      expect(exports.isNodeModule).toEqual(true);
    }));

  it('finds closest module from moduleDirectories', () =>
    createRuntime(__filename, {moduleDirectories}).then(runtime => {
      const exports = runtime.requireModule(
        path.join(rootDir, 'subdir2', 'my_module.js'),
        'module_dir_module',
      );
      expect(exports.modulePath).toEqual(
        'subdir2/module_dir/module_dir_module.js',
      );
    }));

  it('only checks the configured directories', () =>
    createRuntime(__filename, {
      moduleDirectories,
    }).then(runtime => {
      expect(() => {
        runtime.requireModule(runtime.__mockRootPath, 'not-a-haste-package');
      }).toThrow(
        new Error("Cannot find module 'not-a-haste-package' from 'root.js'"),
      );
    }));
});