forked from jestjs/jest
/
integration.test.js
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/
integration.test.js
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/**
* Copyright (c) Facebook, Inc. and its affiliates. 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';
import React from 'react';
import Unmocked from '../__test_modules__/Unmocked';
import Mocked from '../__test_modules__/Mocked';
import a from '../__test_modules__/a';
import b from '../__test_modules__/b';
import c from '../__test_modules__/c';
import d from '../__test_modules__/d';
import f from '../__test_modules__/f';
import jestBackticks from '../__test_modules__/jestBackticks';
// The virtual mock call below will be hoisted above this `require` call.
const virtualModule = require('virtual-module');
// These will all be hoisted above imports
jest.unmock('react');
jest.deepUnmock('../__test_modules__/Unmocked');
jest.unmock('../__test_modules__/c').unmock('../__test_modules__/d');
let e;
(function () {
const _getJestObj = 42;
e = require('../__test_modules__/e').default;
// hoisted to the top of the function scope
jest.unmock('../__test_modules__/e');
})();
jest.mock('../__test_modules__/f', () => {
if (!global.CALLS) {
global.CALLS = 0;
}
global.CALLS++;
return {
_isMock: true,
fn: () => {
// The `jest.mock` transform will allow require, built-ins and globals.
const path = require('path');
const array = new Array(3);
array[0] = path.sep;
return jest.fn(() => array);
},
};
});
jest.mock(`../__test_modules__/jestBackticks`);
jest.mock('virtual-module', () => 'kiwi', {virtual: true});
// This has types that should be ignored by the out-of-scope variables check.
jest.mock('has-flow-types', () => (props: {children: unknown}) => 3, {
virtual: true,
});
// These will not be hoisted
jest.unmock('../__test_modules__/a').dontMock('../__test_modules__/b');
// eslint-disable-next-line no-useless-concat
jest.unmock('../__test_modules__/' + 'a');
jest.dontMock('../__test_modules__/Mocked');
{
const jest = {unmock: () => {}};
// Would error (used before initialization) if hoisted to the top of the scope
jest.unmock('../__test_modules__/a');
}
// This must not throw an error
const myObject = {mock: () => {}};
myObject.mock('apple', 27);
// Variable names prefixed with `mock` (ignore case) should not throw as out-of-scope
const MockMethods = () => {};
jest.mock('../__test_modules__/g', () => MockMethods);
describe('babel-plugin-jest-hoist', () => {
it('does not throw during transform', () => {
const object = {};
object.__defineGetter__('foo', () => 'bar');
expect(object.foo).toEqual('bar');
});
it('hoists react unmock call before imports', () => {
expect(typeof React).toEqual('object');
expect(React.isValidElement.mock).toBe(undefined);
});
it('hoists unmocked modules before imports', () => {
expect(Unmocked._isMockFunction).toBe(undefined);
expect(new Unmocked().isUnmocked).toEqual(true);
expect(c._isMockFunction).toBe(undefined);
expect(c()).toEqual('unmocked');
expect(d._isMockFunction).toBe(undefined);
expect(d()).toEqual('unmocked');
expect(e._isMock).toBe(undefined);
expect(e()).toEqual('unmocked');
});
it('hoists mock call with 2 arguments', () => {
const path = require('path');
expect(f._isMock).toBe(true);
const mockFn = f.fn();
expect(mockFn()).toEqual([path.sep, undefined, undefined]);
});
it('only executes the module factories once', () => {
jest.resetModules();
global.CALLS = 0;
require('../__test_modules__/f');
expect(global.CALLS).toEqual(1);
require('../__test_modules__/f');
expect(global.CALLS).toEqual(1);
delete global.CALLS;
});
it('does not hoist dontMock calls before imports', () => {
expect(Mocked._isMockFunction).toBe(true);
expect(new Mocked().isMocked).toEqual(undefined);
expect(a._isMockFunction).toBe(true);
expect(a()).toEqual(undefined);
expect(b._isMockFunction).toBe(true);
expect(b()).toEqual(undefined);
});
it('requires modules that also call jest.mock', () => {
require('../mockFile');
const mock = require('../banana');
expect(mock).toEqual('apple');
});
it('works with virtual modules', () => {
expect(virtualModule).toBe('kiwi');
});
it('works if the file name is mocked via backticks and defined in the "__mocks__" directory', () => {
expect(jestBackticks.name).toBe('backticks-with-jest');
});
});