825 lines
25 KiB
JavaScript
825 lines
25 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, '__esModule', {
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value: true
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});
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exports.spyOn = exports.mocked = exports.fn = exports.ModuleMocker = void 0;
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function _jestUtil() {
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const data = require('jest-util');
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_jestUtil = function () {
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return data;
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};
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return data;
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}
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/**
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* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
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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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/* eslint-disable local/ban-types-eventually, local/prefer-rest-params-eventually */
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const MOCK_CONSTRUCTOR_NAME = 'mockConstructor';
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const FUNCTION_NAME_RESERVED_PATTERN = /[\s!-/:-@[-`{-~]/;
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const FUNCTION_NAME_RESERVED_REPLACE = new RegExp(
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FUNCTION_NAME_RESERVED_PATTERN.source,
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'g'
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);
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const RESERVED_KEYWORDS = new Set([
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'arguments',
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'await',
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'break',
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'case',
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'catch',
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'class',
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'const',
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'continue',
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'debugger',
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'default',
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'delete',
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'do',
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'else',
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'enum',
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'eval',
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'export',
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'extends',
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'false',
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'finally',
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'for',
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'function',
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'if',
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'implements',
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'import',
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'in',
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'instanceof',
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'interface',
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'let',
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'new',
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'null',
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'package',
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'private',
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'protected',
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'public',
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'return',
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'static',
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'super',
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'switch',
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'this',
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'throw',
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'true',
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'try',
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'typeof',
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'var',
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'void',
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'while',
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'with',
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'yield'
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]);
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function matchArity(fn, length) {
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let mockConstructor;
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switch (length) {
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case 1:
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mockConstructor = function (_a) {
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return fn.apply(this, arguments);
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};
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break;
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case 2:
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mockConstructor = function (_a, _b) {
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return fn.apply(this, arguments);
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};
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break;
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case 3:
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mockConstructor = function (_a, _b, _c) {
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return fn.apply(this, arguments);
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};
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break;
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case 4:
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mockConstructor = function (_a, _b, _c, _d) {
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return fn.apply(this, arguments);
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};
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break;
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case 5:
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mockConstructor = function (_a, _b, _c, _d, _e) {
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return fn.apply(this, arguments);
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};
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break;
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case 6:
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mockConstructor = function (_a, _b, _c, _d, _e, _f) {
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return fn.apply(this, arguments);
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};
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break;
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case 7:
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mockConstructor = function (_a, _b, _c, _d, _e, _f, _g) {
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return fn.apply(this, arguments);
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};
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break;
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case 8:
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mockConstructor = function (_a, _b, _c, _d, _e, _f, _g, _h) {
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return fn.apply(this, arguments);
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};
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break;
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case 9:
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mockConstructor = function (_a, _b, _c, _d, _e, _f, _g, _h, _i) {
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return fn.apply(this, arguments);
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};
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break;
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default:
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mockConstructor = function () {
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return fn.apply(this, arguments);
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};
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break;
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}
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return mockConstructor;
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}
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function getObjectType(value) {
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return Object.prototype.toString.apply(value).slice(8, -1);
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}
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function getType(ref) {
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const typeName = getObjectType(ref);
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if (
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typeName === 'Function' ||
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typeName === 'AsyncFunction' ||
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typeName === 'GeneratorFunction' ||
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typeName === 'AsyncGeneratorFunction'
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) {
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return 'function';
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} else if (Array.isArray(ref)) {
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return 'array';
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} else if (typeName === 'Object') {
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return 'object';
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} else if (
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typeName === 'Number' ||
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typeName === 'String' ||
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typeName === 'Boolean' ||
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typeName === 'Symbol'
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) {
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return 'constant';
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} else if (
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typeName === 'Map' ||
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typeName === 'WeakMap' ||
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typeName === 'Set'
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) {
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return 'collection';
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} else if (typeName === 'RegExp') {
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return 'regexp';
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} else if (ref === undefined) {
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return 'undefined';
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} else if (ref === null) {
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return 'null';
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} else {
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return null;
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}
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}
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function isReadonlyProp(object, prop) {
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if (
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prop === 'arguments' ||
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prop === 'caller' ||
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prop === 'callee' ||
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prop === 'name' ||
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prop === 'length'
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) {
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const typeName = getObjectType(object);
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return (
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typeName === 'Function' ||
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typeName === 'AsyncFunction' ||
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typeName === 'GeneratorFunction' ||
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typeName === 'AsyncGeneratorFunction'
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);
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}
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if (
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prop === 'source' ||
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prop === 'global' ||
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prop === 'ignoreCase' ||
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prop === 'multiline'
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) {
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return getObjectType(object) === 'RegExp';
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}
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return false;
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}
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class ModuleMocker {
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_environmentGlobal;
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_mockState;
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_mockConfigRegistry;
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_spyState;
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_invocationCallCounter;
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/**
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* @see README.md
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* @param global Global object of the test environment, used to create
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* mocks
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*/
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constructor(global) {
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this._environmentGlobal = global;
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this._mockState = new WeakMap();
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this._mockConfigRegistry = new WeakMap();
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this._spyState = new Set();
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this._invocationCallCounter = 1;
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}
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_getSlots(object) {
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if (!object) {
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return [];
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}
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const slots = new Set();
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const EnvObjectProto = this._environmentGlobal.Object.prototype;
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const EnvFunctionProto = this._environmentGlobal.Function.prototype;
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const EnvRegExpProto = this._environmentGlobal.RegExp.prototype;
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// Also check the builtins in the current context as they leak through
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// core node modules.
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const ObjectProto = Object.prototype;
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const FunctionProto = Function.prototype;
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const RegExpProto = RegExp.prototype;
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// Properties of Object.prototype, Function.prototype and RegExp.prototype
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// are never reported as slots
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while (
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object != null &&
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object !== EnvObjectProto &&
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object !== EnvFunctionProto &&
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object !== EnvRegExpProto &&
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object !== ObjectProto &&
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object !== FunctionProto &&
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object !== RegExpProto
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) {
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const ownNames = Object.getOwnPropertyNames(object);
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for (let i = 0; i < ownNames.length; i++) {
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const prop = ownNames[i];
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if (!isReadonlyProp(object, prop)) {
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const propDesc = Object.getOwnPropertyDescriptor(object, prop);
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if ((propDesc !== undefined && !propDesc.get) || object.__esModule) {
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slots.add(prop);
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}
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}
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}
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object = Object.getPrototypeOf(object);
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}
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return Array.from(slots);
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}
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_ensureMockConfig(f) {
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let config = this._mockConfigRegistry.get(f);
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if (!config) {
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config = this._defaultMockConfig();
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this._mockConfigRegistry.set(f, config);
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}
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return config;
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}
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_ensureMockState(f) {
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let state = this._mockState.get(f);
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if (!state) {
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state = this._defaultMockState();
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this._mockState.set(f, state);
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}
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if (state.calls.length > 0) {
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state.lastCall = state.calls[state.calls.length - 1];
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}
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return state;
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}
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_defaultMockConfig() {
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return {
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mockImpl: undefined,
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mockName: 'jest.fn()',
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specificMockImpls: [],
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specificReturnValues: []
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};
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}
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_defaultMockState() {
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return {
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calls: [],
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contexts: [],
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instances: [],
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invocationCallOrder: [],
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results: []
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};
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}
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_makeComponent(metadata, restore) {
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if (metadata.type === 'object') {
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return new this._environmentGlobal.Object();
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} else if (metadata.type === 'array') {
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return new this._environmentGlobal.Array();
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} else if (metadata.type === 'regexp') {
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return new this._environmentGlobal.RegExp('');
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} else if (
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metadata.type === 'constant' ||
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metadata.type === 'collection' ||
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metadata.type === 'null' ||
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metadata.type === 'undefined'
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) {
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return metadata.value;
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} else if (metadata.type === 'function') {
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const prototype =
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(metadata.members &&
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metadata.members.prototype &&
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metadata.members.prototype.members) ||
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{};
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const prototypeSlots = this._getSlots(prototype);
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// eslint-disable-next-line @typescript-eslint/no-this-alias
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const mocker = this;
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const mockConstructor = matchArity(function (...args) {
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const mockState = mocker._ensureMockState(f);
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const mockConfig = mocker._ensureMockConfig(f);
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mockState.instances.push(this);
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mockState.contexts.push(this);
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mockState.calls.push(args);
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// Create and record an "incomplete" mock result immediately upon
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// calling rather than waiting for the mock to return. This avoids
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// issues caused by recursion where results can be recorded in the
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// wrong order.
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const mockResult = {
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type: 'incomplete',
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value: undefined
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};
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mockState.results.push(mockResult);
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mockState.invocationCallOrder.push(mocker._invocationCallCounter++);
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// Will be set to the return value of the mock if an error is not thrown
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let finalReturnValue;
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// Will be set to the error that is thrown by the mock (if it throws)
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let thrownError;
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// Will be set to true if the mock throws an error. The presence of a
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// value in `thrownError` is not a 100% reliable indicator because a
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// function could throw a value of undefined.
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let callDidThrowError = false;
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try {
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// The bulk of the implementation is wrapped in an immediately
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// executed arrow function so the return value of the mock function
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// can be easily captured and recorded, despite the many separate
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// return points within the logic.
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finalReturnValue = (() => {
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if (this instanceof f) {
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// This is probably being called as a constructor
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prototypeSlots.forEach(slot => {
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// Copy prototype methods to the instance to make
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// it easier to interact with mock instance call and
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// return values
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if (prototype[slot].type === 'function') {
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// @ts-expect-error no index signature
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const protoImpl = this[slot];
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// @ts-expect-error no index signature
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this[slot] = mocker.generateFromMetadata(prototype[slot]);
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// @ts-expect-error no index signature
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this[slot]._protoImpl = protoImpl;
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}
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});
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// Run the mock constructor implementation
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const mockImpl = mockConfig.specificMockImpls.length
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? mockConfig.specificMockImpls.shift()
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: mockConfig.mockImpl;
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return mockImpl && mockImpl.apply(this, arguments);
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}
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// If mockImplementationOnce()/mockImplementation() is last set,
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// implementation use the mock
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let specificMockImpl = mockConfig.specificMockImpls.shift();
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if (specificMockImpl === undefined) {
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specificMockImpl = mockConfig.mockImpl;
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}
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if (specificMockImpl) {
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return specificMockImpl.apply(this, arguments);
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}
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// Otherwise use prototype implementation
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if (f._protoImpl) {
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return f._protoImpl.apply(this, arguments);
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}
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return undefined;
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})();
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} catch (error) {
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// Store the thrown error so we can record it, then re-throw it.
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thrownError = error;
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callDidThrowError = true;
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throw error;
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} finally {
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// Record the result of the function.
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// NOTE: Intentionally NOT pushing/indexing into the array of mock
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// results here to avoid corrupting results data if mockClear()
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// is called during the execution of the mock.
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// @ts-expect-error reassigning 'incomplete'
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mockResult.type = callDidThrowError ? 'throw' : 'return';
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mockResult.value = callDidThrowError ? thrownError : finalReturnValue;
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}
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return finalReturnValue;
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}, metadata.length || 0);
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const f = this._createMockFunction(metadata, mockConstructor);
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f._isMockFunction = true;
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f.getMockImplementation = () => this._ensureMockConfig(f).mockImpl;
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if (typeof restore === 'function') {
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this._spyState.add(restore);
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}
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this._mockState.set(f, this._defaultMockState());
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this._mockConfigRegistry.set(f, this._defaultMockConfig());
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Object.defineProperty(f, 'mock', {
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configurable: false,
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enumerable: true,
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get: () => this._ensureMockState(f),
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set: val => this._mockState.set(f, val)
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});
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f.mockClear = () => {
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this._mockState.delete(f);
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return f;
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};
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f.mockReset = () => {
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f.mockClear();
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this._mockConfigRegistry.delete(f);
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return f;
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};
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f.mockRestore = () => {
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f.mockReset();
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return restore ? restore() : undefined;
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};
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f.mockReturnValueOnce = value =>
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// next function call will return this value or default return value
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f.mockImplementationOnce(() => value);
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f.mockResolvedValueOnce = value =>
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f.mockImplementationOnce(() =>
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this._environmentGlobal.Promise.resolve(value)
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);
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f.mockRejectedValueOnce = value =>
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f.mockImplementationOnce(() =>
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this._environmentGlobal.Promise.reject(value)
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);
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f.mockReturnValue = value =>
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// next function call will return specified return value or this one
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f.mockImplementation(() => value);
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f.mockResolvedValue = value =>
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f.mockImplementation(() =>
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this._environmentGlobal.Promise.resolve(value)
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);
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f.mockRejectedValue = value =>
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f.mockImplementation(() =>
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this._environmentGlobal.Promise.reject(value)
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);
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f.mockImplementationOnce = fn => {
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// next function call will use this mock implementation return value
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// or default mock implementation return value
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const mockConfig = this._ensureMockConfig(f);
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mockConfig.specificMockImpls.push(fn);
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return f;
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};
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f.withImplementation = withImplementation.bind(this);
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function withImplementation(fn, callback) {
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// Remember previous mock implementation, then set new one
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const mockConfig = this._ensureMockConfig(f);
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const previousImplementation = mockConfig.mockImpl;
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mockConfig.mockImpl = fn;
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const returnedValue = callback();
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if ((0, _jestUtil().isPromise)(returnedValue)) {
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return returnedValue.then(() => {
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mockConfig.mockImpl = previousImplementation;
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});
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} else {
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mockConfig.mockImpl = previousImplementation;
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}
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}
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f.mockImplementation = fn => {
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// next function call will use mock implementation return value
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const mockConfig = this._ensureMockConfig(f);
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mockConfig.mockImpl = fn;
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return f;
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};
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f.mockReturnThis = () =>
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f.mockImplementation(function () {
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return this;
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});
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f.mockName = name => {
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if (name) {
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const mockConfig = this._ensureMockConfig(f);
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mockConfig.mockName = name;
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}
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return f;
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};
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f.getMockName = () => {
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const mockConfig = this._ensureMockConfig(f);
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return mockConfig.mockName || 'jest.fn()';
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};
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if (metadata.mockImpl) {
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f.mockImplementation(metadata.mockImpl);
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}
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return f;
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} else {
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const unknownType = metadata.type || 'undefined type';
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throw new Error(`Unrecognized type ${unknownType}`);
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}
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}
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_createMockFunction(metadata, mockConstructor) {
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let name = metadata.name;
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if (!name) {
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return mockConstructor;
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}
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// Preserve `name` property of mocked function.
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const boundFunctionPrefix = 'bound ';
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let bindCall = '';
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// if-do-while for perf reasons. The common case is for the if to fail.
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if (name && name.startsWith(boundFunctionPrefix)) {
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do {
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name = name.substring(boundFunctionPrefix.length);
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// Call bind() just to alter the function name.
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bindCall = '.bind(null)';
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} while (name && name.startsWith(boundFunctionPrefix));
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}
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// Special case functions named `mockConstructor` to guard for infinite loops
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if (name === MOCK_CONSTRUCTOR_NAME) {
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return mockConstructor;
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}
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if (
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// It's a syntax error to define functions with a reserved keyword as name
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RESERVED_KEYWORDS.has(name) ||
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// It's also a syntax error to define functions with a name that starts with a number
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/^\d/.test(name)
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) {
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name = `$${name}`;
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}
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// It's also a syntax error to define a function with a reserved character
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// as part of it's name.
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if (FUNCTION_NAME_RESERVED_PATTERN.test(name)) {
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name = name.replace(FUNCTION_NAME_RESERVED_REPLACE, '$');
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}
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const body =
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`return function ${name}() {` +
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` return ${MOCK_CONSTRUCTOR_NAME}.apply(this,arguments);` +
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`}${bindCall}`;
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const createConstructor = new this._environmentGlobal.Function(
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MOCK_CONSTRUCTOR_NAME,
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body
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);
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return createConstructor(mockConstructor);
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}
|
|
_generateMock(metadata, callbacks, refs) {
|
|
// metadata not compatible but it's the same type, maybe problem with
|
|
// overloading of _makeComponent and not _generateMock?
|
|
// @ts-expect-error - unsure why TSC complains here?
|
|
const mock = this._makeComponent(metadata);
|
|
if (metadata.refID != null) {
|
|
refs[metadata.refID] = mock;
|
|
}
|
|
this._getSlots(metadata.members).forEach(slot => {
|
|
const slotMetadata = (metadata.members && metadata.members[slot]) || {};
|
|
if (slotMetadata.ref != null) {
|
|
callbacks.push(
|
|
(function (ref) {
|
|
return () => (mock[slot] = refs[ref]);
|
|
})(slotMetadata.ref)
|
|
);
|
|
} else {
|
|
mock[slot] = this._generateMock(slotMetadata, callbacks, refs);
|
|
}
|
|
});
|
|
if (
|
|
metadata.type !== 'undefined' &&
|
|
metadata.type !== 'null' &&
|
|
mock.prototype &&
|
|
typeof mock.prototype === 'object'
|
|
) {
|
|
mock.prototype.constructor = mock;
|
|
}
|
|
return mock;
|
|
}
|
|
|
|
/**
|
|
* @see README.md
|
|
* @param metadata Metadata for the mock in the schema returned by the
|
|
* getMetadata method of this module.
|
|
*/
|
|
generateFromMetadata(metadata) {
|
|
const callbacks = [];
|
|
const refs = {};
|
|
const mock = this._generateMock(metadata, callbacks, refs);
|
|
callbacks.forEach(setter => setter());
|
|
return mock;
|
|
}
|
|
|
|
/**
|
|
* @see README.md
|
|
* @param component The component for which to retrieve metadata.
|
|
*/
|
|
getMetadata(component, _refs) {
|
|
const refs = _refs || new Map();
|
|
const ref = refs.get(component);
|
|
if (ref != null) {
|
|
return {
|
|
ref
|
|
};
|
|
}
|
|
const type = getType(component);
|
|
if (!type) {
|
|
return null;
|
|
}
|
|
const metadata = {
|
|
type
|
|
};
|
|
if (
|
|
type === 'constant' ||
|
|
type === 'collection' ||
|
|
type === 'undefined' ||
|
|
type === 'null'
|
|
) {
|
|
metadata.value = component;
|
|
return metadata;
|
|
} else if (type === 'function') {
|
|
// @ts-expect-error component is a function so it has a name, but not
|
|
// necessarily a string: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#function_names_in_classes
|
|
const componentName = component.name;
|
|
if (typeof componentName === 'string') {
|
|
metadata.name = componentName;
|
|
}
|
|
if (this.isMockFunction(component)) {
|
|
metadata.mockImpl = component.getMockImplementation();
|
|
}
|
|
}
|
|
metadata.refID = refs.size;
|
|
refs.set(component, metadata.refID);
|
|
let members = null;
|
|
// Leave arrays alone
|
|
if (type !== 'array') {
|
|
// @ts-expect-error component is object
|
|
this._getSlots(component).forEach(slot => {
|
|
if (
|
|
type === 'function' &&
|
|
this.isMockFunction(component) &&
|
|
slot.match(/^mock/)
|
|
) {
|
|
return;
|
|
}
|
|
// @ts-expect-error no index signature
|
|
const slotMetadata = this.getMetadata(component[slot], refs);
|
|
if (slotMetadata) {
|
|
if (!members) {
|
|
members = {};
|
|
}
|
|
members[slot] = slotMetadata;
|
|
}
|
|
});
|
|
}
|
|
if (members) {
|
|
metadata.members = members;
|
|
}
|
|
return metadata;
|
|
}
|
|
isMockFunction(fn) {
|
|
return fn != null && fn._isMockFunction === true;
|
|
}
|
|
fn(implementation) {
|
|
const length = implementation ? implementation.length : 0;
|
|
const fn = this._makeComponent({
|
|
length,
|
|
type: 'function'
|
|
});
|
|
if (implementation) {
|
|
fn.mockImplementation(implementation);
|
|
}
|
|
return fn;
|
|
}
|
|
// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
|
|
spyOn(object, methodKey, accessType) {
|
|
if (typeof object !== 'object' && typeof object !== 'function') {
|
|
throw new Error(
|
|
`Cannot spyOn on a primitive value; ${this._typeOf(object)} given`
|
|
);
|
|
}
|
|
if (!object) {
|
|
throw new Error(
|
|
`spyOn could not find an object to spy upon for ${String(methodKey)}`
|
|
);
|
|
}
|
|
if (!methodKey) {
|
|
throw new Error('No property name supplied');
|
|
}
|
|
if (accessType) {
|
|
return this._spyOnProperty(object, methodKey, accessType);
|
|
}
|
|
const original = object[methodKey];
|
|
if (!this.isMockFunction(original)) {
|
|
if (typeof original !== 'function') {
|
|
throw new Error(
|
|
`Cannot spy the ${String(
|
|
methodKey
|
|
)} property because it is not a function; ${this._typeOf(
|
|
original
|
|
)} given instead`
|
|
);
|
|
}
|
|
const isMethodOwner = Object.prototype.hasOwnProperty.call(
|
|
object,
|
|
methodKey
|
|
);
|
|
let descriptor = Object.getOwnPropertyDescriptor(object, methodKey);
|
|
let proto = Object.getPrototypeOf(object);
|
|
while (!descriptor && proto !== null) {
|
|
descriptor = Object.getOwnPropertyDescriptor(proto, methodKey);
|
|
proto = Object.getPrototypeOf(proto);
|
|
}
|
|
let mock;
|
|
if (descriptor && descriptor.get) {
|
|
const originalGet = descriptor.get;
|
|
mock = this._makeComponent(
|
|
{
|
|
type: 'function'
|
|
},
|
|
() => {
|
|
descriptor.get = originalGet;
|
|
Object.defineProperty(object, methodKey, descriptor);
|
|
}
|
|
);
|
|
descriptor.get = () => mock;
|
|
Object.defineProperty(object, methodKey, descriptor);
|
|
} else {
|
|
mock = this._makeComponent(
|
|
{
|
|
type: 'function'
|
|
},
|
|
() => {
|
|
if (isMethodOwner) {
|
|
object[methodKey] = original;
|
|
} else {
|
|
delete object[methodKey];
|
|
}
|
|
}
|
|
);
|
|
// @ts-expect-error overriding original method with a Mock
|
|
object[methodKey] = mock;
|
|
}
|
|
mock.mockImplementation(function () {
|
|
return original.apply(this, arguments);
|
|
});
|
|
}
|
|
return object[methodKey];
|
|
}
|
|
_spyOnProperty(obj, propertyKey, accessType) {
|
|
let descriptor = Object.getOwnPropertyDescriptor(obj, propertyKey);
|
|
let proto = Object.getPrototypeOf(obj);
|
|
while (!descriptor && proto !== null) {
|
|
descriptor = Object.getOwnPropertyDescriptor(proto, propertyKey);
|
|
proto = Object.getPrototypeOf(proto);
|
|
}
|
|
if (!descriptor) {
|
|
throw new Error(`${String(propertyKey)} property does not exist`);
|
|
}
|
|
if (!descriptor.configurable) {
|
|
throw new Error(`${String(propertyKey)} is not declared configurable`);
|
|
}
|
|
if (!descriptor[accessType]) {
|
|
throw new Error(
|
|
`Property ${String(
|
|
propertyKey
|
|
)} does not have access type ${accessType}`
|
|
);
|
|
}
|
|
const original = descriptor[accessType];
|
|
if (!this.isMockFunction(original)) {
|
|
if (typeof original !== 'function') {
|
|
throw new Error(
|
|
`Cannot spy the ${String(
|
|
propertyKey
|
|
)} property because it is not a function; ${this._typeOf(
|
|
original
|
|
)} given instead`
|
|
);
|
|
}
|
|
descriptor[accessType] = this._makeComponent(
|
|
{
|
|
type: 'function'
|
|
},
|
|
() => {
|
|
// @ts-expect-error: mock is assignable
|
|
descriptor[accessType] = original;
|
|
Object.defineProperty(obj, propertyKey, descriptor);
|
|
}
|
|
);
|
|
descriptor[accessType].mockImplementation(function () {
|
|
// @ts-expect-error - wrong context
|
|
return original.apply(this, arguments);
|
|
});
|
|
}
|
|
Object.defineProperty(obj, propertyKey, descriptor);
|
|
return descriptor[accessType];
|
|
}
|
|
clearAllMocks() {
|
|
this._mockState = new WeakMap();
|
|
}
|
|
resetAllMocks() {
|
|
this._mockConfigRegistry = new WeakMap();
|
|
this._mockState = new WeakMap();
|
|
}
|
|
restoreAllMocks() {
|
|
this._spyState.forEach(restore => restore());
|
|
this._spyState = new Set();
|
|
}
|
|
_typeOf(value) {
|
|
return value == null ? `${value}` : typeof value;
|
|
}
|
|
mocked(source, _options) {
|
|
return source;
|
|
}
|
|
}
|
|
exports.ModuleMocker = ModuleMocker;
|
|
const JestMock = new ModuleMocker(globalThis);
|
|
const fn = JestMock.fn.bind(JestMock);
|
|
exports.fn = fn;
|
|
const spyOn = JestMock.spyOn.bind(JestMock);
|
|
exports.spyOn = spyOn;
|
|
const mocked = JestMock.mocked.bind(JestMock);
|
|
exports.mocked = mocked;
|