How to use restorer method in sinon

Best JavaScript code snippet using sinon

index.test.js

Source:index.test.js Github

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1jest.mock('../util/get_window');2var getWindowModule = require('../util/get_window');3var scrollRestorer = require('../index');4describe('scroll-restorer', function() {5 beforeEach(function() {6 // Mock the window object.7 jest.spyOn(getWindowModule, 'getWindow').mockReturnValue({8 addEventListener: jest.fn(),9 document: {10 body: {11 scrollHeight: 10012 }13 },14 history: {15 replaceState: jest.fn(),16 scrollRestoration: 'foo',17 state: {18 scroll: {19 x: 0,20 y: 021 }22 }23 },24 location: 'foo',25 pageXOffset: 0,26 pageYOffset: 0,27 removeEventListener: jest.fn(),28 replaceState: jest.fn(),29 // We just invoke requestAnimationFrame functions immediately.30 requestAnimationFrame: function(fn) {31 fn();32 },33 scrollTo: jest.fn()34 });35 });36 afterEach(function() {37 getWindowModule.getWindow.mockRestore();38 });39 describe('start', function() {40 it('adds a scroll event listener', function() {41 scrollRestorer.start();42 var addEventListenerArgs = getWindowModule.getWindow().addEventListener43 .mock.calls[0];44 expect(addEventListenerArgs[0]).toBe('scroll');45 });46 it('adds a scroll event listener with passive option enabled', function() {47 scrollRestorer.start();48 var addEventListenerArgs = getWindowModule.getWindow().addEventListener49 .mock.calls[0];50 expect(addEventListenerArgs[2]).toEqual({ passive: true });51 });52 it('adds a popstate event listener when autoRestore option is omitted', function() {53 scrollRestorer.start();54 // We should have attached popstate and scroll event listeners.55 expect(56 getWindowModule.getWindow().addEventListener57 ).toHaveBeenCalledTimes(2);58 // Find the popstate addEventListener call.59 var popStateListenerCall = getWindowModule60 .getWindow()61 .addEventListener.mock.calls.filter(function(callArgs) {62 return callArgs[0] === 'popstate';63 });64 expect(popStateListenerCall.length).toBe(1);65 });66 it('does not add a popstate event listener when autoRestore option is false', function() {67 scrollRestorer.start({ autoRestore: false });68 // We should have attached only a scroll listener.69 expect(70 getWindowModule.getWindow().addEventListener71 ).toHaveBeenCalledTimes(1);72 // We should not have attached a popstate listener.73 var addEventListenerArgs = getWindowModule.getWindow().addEventListener74 .mock.calls[0];75 expect(addEventListenerArgs[0]).not.toBe('popstate');76 });77 it('sets history.scrollRestoration to manual if property exists', function() {78 expect(getWindowModule.getWindow().history.scrollRestoration).toEqual(79 'foo'80 );81 scrollRestorer.start();82 expect(getWindowModule.getWindow().history.scrollRestoration).toEqual(83 'manual'84 );85 });86 it('does not set history.scrollRestoration if property does not exists', function() {87 delete getWindowModule.getWindow().history.scrollRestoration;88 scrollRestorer.start();89 expect(getWindowModule.getWindow().history.scrollRestoration).toEqual(90 undefined91 );92 });93 });94 describe('captureScroll', function() {95 beforeEach(function() {96 jest.useFakeTimers();97 });98 afterEach(function() {99 jest.useRealTimers();100 });101 it('calls #replaceState if the saved offset values have changed', function() {102 // We're pretending that the user scrolled the window by 20px on both axes.103 getWindowModule.getWindow().pageXOffset = 20;104 getWindowModule.getWindow().pageYOffset = 20;105 scrollRestorer.start();106 var addEventListenerArgs = getWindowModule.getWindow().addEventListener107 .mock.calls[0];108 // Let's verify that this is the scroll event listener.109 expect(addEventListenerArgs[0]).toEqual('scroll');110 // Let's invoke the debounced event handler directly.111 addEventListenerArgs[1]();112 // We fake the passage of time to invoke our debounced function.113 jest.runAllTimers();114 // Assert that replaceState was invoked with the "new" scroll offset values.115 expect(116 getWindowModule.getWindow().history.replaceState117 ).toHaveBeenCalledWith(118 { scroll: { x: 20, y: 20 } },119 null,120 getWindowModule.getWindow().location121 );122 });123 it('does not call #replaceState if the saved offset values have not changed', function() {124 scrollRestorer.start();125 var addEventListenerArgs = getWindowModule.getWindow().addEventListener126 .mock.calls[0];127 // Let's verify that this is the scroll event listener.128 expect(addEventListenerArgs[0]).toEqual('scroll');129 // Let's invoke the debounced event handler directly.130 addEventListenerArgs[1]();131 // We fake the passage of time to invoke our debounced function.132 jest.runAllTimers();133 expect(134 getWindowModule.getWindow().history.replaceState135 ).not.toHaveBeenCalled();136 });137 });138 describe('getSavedScroll', function() {139 it('returns value from provided input', function() {140 expect(scrollRestorer.getSavedScroll({ state: { scroll: 'foo' } })).toBe(141 'foo'142 );143 });144 it('returns value from window.history when input is not defined', function() {145 expect(scrollRestorer.getSavedScroll()).toEqual({ x: 0, y: 0 });146 });147 it('returns undefined when input.state is undefined', function() {148 expect(scrollRestorer.getSavedScroll({ foo: 'bar' })).toEqual(undefined);149 });150 });151 describe('restoreScroll', function() {152 it('calls #scrollTo with a position retrieved from state in window.history', function() {153 // We're pretending that a scroll position has been saved previously.154 getWindowModule.getWindow().history.state.scroll = { x: 0, y: 20 };155 scrollRestorer.restoreScroll();156 expect(getWindowModule.getWindow().scrollTo).toHaveBeenCalledWith(0, 20);157 });158 it('calls #scrollTo with a position retrieved from a popstate event', function() {159 var popstateEvent = { state: { scroll: { x: 0, y: 40 } } };160 scrollRestorer.restoreScroll(popstateEvent);161 expect(getWindowModule.getWindow().scrollTo).toHaveBeenCalledWith(0, 40);162 });163 it('does not call #scrollTo when unnecessary', function() {164 // We're pretending that the user scrolled the window by 20px on the y axis.165 getWindowModule.getWindow().pageXOffset = 0;166 getWindowModule.getWindow().pageYOffset = 20;167 // We're pretending that the same scroll position has already been saved.168 getWindowModule.getWindow().history.state.scroll = { x: 0, y: 20 };169 scrollRestorer.start();170 scrollRestorer.restoreScroll();171 scrollRestorer.end();172 expect(getWindowModule.getWindow().scrollTo).not.toHaveBeenCalled();173 });174 it('returns early if no saved scroll positions exist', function() {175 getWindowModule.getWindow().requestAnimationFrame = jest.fn();176 scrollRestorer.restoreScroll({ foo: 'bar' });177 expect(178 getWindowModule.getWindow().requestAnimationFrame179 ).not.toHaveBeenCalled();180 });181 });182 describe('end', function() {183 it('removes the scroll event listener with identical arguments', function() {184 scrollRestorer.start();185 scrollRestorer.end();186 var addEventListenerArgs = getWindowModule.getWindow().addEventListener187 .mock.calls[0];188 var removeEventListenerArgs = getWindowModule.getWindow()189 .removeEventListener.mock.calls[0];190 // Let's verify that this is the scroll event listener.191 expect(addEventListenerArgs[0]).toEqual('scroll');192 // Let's verify that our handler function is === when adding and removing.193 expect(addEventListenerArgs[1]).toBe(removeEventListenerArgs[1]);194 expect(addEventListenerArgs).toEqual(removeEventListenerArgs);195 });196 it('removes the popstate event listener with identical arguments', function() {197 scrollRestorer.start({ autoRestore: true });198 scrollRestorer.end();199 var addEventListenerArgs = getWindowModule.getWindow().addEventListener200 .mock.calls[1];201 var removeEventListenerArgs = getWindowModule.getWindow()202 .removeEventListener.mock.calls[1];203 // Let's verify that this is the popstate event listener.204 expect(addEventListenerArgs[0]).toEqual('popstate');205 // Let's verify that our handler function is === when adding and removing.206 expect(addEventListenerArgs[1]).toBe(removeEventListenerArgs[1]);207 expect(addEventListenerArgs).toEqual(removeEventListenerArgs);208 });209 });...

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ExifRestorer.js

Source:ExifRestorer.js Github

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1//Based on MinifyJpeg2//http://elicon.blog57.fc2.com/blog-entry-206.html3qq.ExifRestorer = (function()4{5 6 var ExifRestorer = {};7 8 ExifRestorer.KEY_STR = "ABCDEFGHIJKLMNOP" +9 "QRSTUVWXYZabcdef" +10 "ghijklmnopqrstuv" +11 "wxyz0123456789+/" +12 "=";13 ExifRestorer.encode64 = function(input)14 {15 var output = "",16 chr1, chr2, chr3 = "",17 enc1, enc2, enc3, enc4 = "",18 i = 0;19 do {20 chr1 = input[i++];21 chr2 = input[i++];22 chr3 = input[i++];23 enc1 = chr1 >> 2;24 enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);25 enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);26 enc4 = chr3 & 63;27 if (isNaN(chr2)) {28 enc3 = enc4 = 64;29 } else if (isNaN(chr3)) {30 enc4 = 64;31 }32 output = output +33 this.KEY_STR.charAt(enc1) +34 this.KEY_STR.charAt(enc2) +35 this.KEY_STR.charAt(enc3) +36 this.KEY_STR.charAt(enc4);37 chr1 = chr2 = chr3 = "";38 enc1 = enc2 = enc3 = enc4 = "";39 } while (i < input.length);40 return output;41 };42 43 ExifRestorer.restore = function(origFileBase64, resizedFileBase64)44 {45 var expectedBase64Header = "data:image/jpeg;base64,";46 if (!origFileBase64.match(expectedBase64Header))47 {48 return resizedFileBase64;49 } 50 51 var rawImage = this.decode64(origFileBase64.replace(expectedBase64Header, ""));52 var segments = this.slice2Segments(rawImage);53 54 var image = this.exifManipulation(resizedFileBase64, segments);55 56 return expectedBase64Header + this.encode64(image);57 58 };59 ExifRestorer.exifManipulation = function(resizedFileBase64, segments)60 {61 var exifArray = this.getExifArray(segments),62 newImageArray = this.insertExif(resizedFileBase64, exifArray),63 aBuffer = new Uint8Array(newImageArray);64 return aBuffer;65 };66 ExifRestorer.getExifArray = function(segments)67 {68 var seg;69 for (var x = 0; x < segments.length; x++)70 {71 seg = segments[x];72 if (seg[0] == 255 & seg[1] == 225) //(ff e1)73 {74 return seg;75 }76 }77 return [];78 };79 ExifRestorer.insertExif = function(resizedFileBase64, exifArray)80 {81 var imageData = resizedFileBase64.replace("data:image/jpeg;base64,", ""),82 buf = this.decode64(imageData),83 separatePoint = buf.indexOf(255,3),84 mae = buf.slice(0, separatePoint),85 ato = buf.slice(separatePoint),86 array = mae;87 array = array.concat(exifArray);88 array = array.concat(ato);89 return array;90 };91 92 ExifRestorer.slice2Segments = function(rawImageArray)93 {94 var head = 0,95 segments = [];96 while (1)97 {98 if (rawImageArray[head] == 255 & rawImageArray[head + 1] == 218){break;}99 if (rawImageArray[head] == 255 & rawImageArray[head + 1] == 216)100 {101 head += 2;102 }103 else104 {105 var length = rawImageArray[head + 2] * 256 + rawImageArray[head + 3],106 endPoint = head + length + 2,107 seg = rawImageArray.slice(head, endPoint);108 segments.push(seg);109 head = endPoint;110 }111 if (head > rawImageArray.length){break;}112 }113 return segments;114 };115 116 ExifRestorer.decode64 = function(input) 117 {118 var output = "",119 chr1, chr2, chr3 = "",120 enc1, enc2, enc3, enc4 = "",121 i = 0,122 buf = [];123 // remove all characters that are not A-Z, a-z, 0-9, +, /, or =124 var base64test = /[^A-Za-z0-9\+\/\=]/g;125 if (base64test.exec(input)) {126 throw new Error("There were invalid base64 characters in the input text. " +127 "Valid base64 characters are A-Z, a-z, 0-9, '+', '/',and '='");128 }129 input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");130 do {131 enc1 = this.KEY_STR.indexOf(input.charAt(i++));132 enc2 = this.KEY_STR.indexOf(input.charAt(i++));133 enc3 = this.KEY_STR.indexOf(input.charAt(i++));134 enc4 = this.KEY_STR.indexOf(input.charAt(i++));135 chr1 = (enc1 << 2) | (enc2 >> 4);136 chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);137 chr3 = ((enc3 & 3) << 6) | enc4;138 buf.push(chr1);139 if (enc3 != 64) {140 buf.push(chr2);141 }142 if (enc4 != 64) {143 buf.push(chr3);144 }145 chr1 = chr2 = chr3 = "";146 enc1 = enc2 = enc3 = enc4 = "";147 } while (i < input.length);148 return buf;149 };150 151 return ExifRestorer;...

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restorer.js

Source:restorer.js Github

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1"use strict";2/*3This file is part of the ONLINE WARBAND CREATOR (https://github.com/suppenhuhn79/sbhowc)4Copyright 2021 Christoph Zager5Licensed unter the GNU Affero General Public License, Version 36See the full license text at https://www.gnu.org/licenses/agpl-3.0.en.html7 */8var restorer = {};9restorer.sort =10{11 field: "last-modified",12 direction: 113};14restorer.show = function ()15{16 owc.ui.showBluebox(document.getElementById("restorer"));17 restorer.listStoredData();18};19restorer.close = () => owc.ui.sweepVolatiles();20restorer.getSelectedPid = function ()21{22 let selectedItem = document.getElementById("restorer-table-frame").querySelector(".selected");23 return (!!selectedItem) ? selectedItem.getAttribute("data-id") : null;24};25restorer.storageItemClick = function (clickEvent)26{27 let selectedItem = document.getElementById("restorer-table-frame").querySelector(".selected");28 if (!!selectedItem)29 {30 selectedItem.classList.remove("selected");31 };32 clickEvent.target.closest("tr[data-id]").classList.add("selected");33};34restorer.restoreClick = function (clickEvent)35{36 let selectedPid = restorer.getSelectedPid();37 if (!!selectedPid)38 {39 restorer.close();40 let warbandCode = JSON.parse(localStorage.getItem(selectedPid)).data;41 owc.importWarband(warbandCode);42 /* unselect everything in document, some browsers interpret a dblclk as intend to select anything */43 if (typeof window.getSelection === "function")44 {45 window.getSelection().removeAllRanges();46 }47 else if (typeof document.selection === "funtion")48 {49 document.selection.empty();50 };51 };52};53restorer.discardClick = function (clickEvent)54{55 clickEvent.stopPropagation();56 let selectedPid = restorer.getSelectedPid();57 if (!!selectedPid)58 {59 localStorage.removeItem(selectedPid);60 let deletedBubble = document.getElementById("deletedBubble");61 deletedBubble.style.left = Math.floor(document.querySelector("#restorer input[value=\"discard\"]").getBoundingClientRect().x - document.getElementById("restorer").getBoundingClientRect().x) + "px";62 owc.ui.showNotification(deletedBubble);63 restorer.listStoredData();64 };65};66restorer.tableheaderClick = function (clickEvent)67{68 let sortField = clickEvent.target.getAttribute("data-sortfield");69 if (restorer.sort.field === sortField)70 {71 restorer.sort.direction = restorer.sort.direction * -1;72 }73 else74 {75 restorer.sort.field = sortField;76 restorer.sort.direction = 1;77 };78 restorer.listStoredData();79};80restorer.listStoredData = function ()81{82 function _naturalPast(pastDate)83 {84 const wordings = ["just now", "{{n}} minutes ago", "{{6}} hours ago"];85 const dayWordings = ["today", "yesterday", "two days ago"];86 let result = "";87 let now = new Date();88 let maxHours = Number(/\{{2}(\d+)\}{2}/.exec(wordings[2])[1]);89 let secondsDiff = (now.getTime() - pastDate.getTime()) / 1000;90 let diff =91 {92 minutes: secondsDiff / 60,93 hours: secondsDiff / 60 / 60,94 days: Math.floor((Date.UTC(now.getFullYear(), now.getMonth(), now.getDate()) - Date.UTC(pastDate.getFullYear(), pastDate.getMonth(), pastDate.getDate())) / (1000 * 60 * 60 * 24))95 };96 if (secondsDiff < 60)97 {98 result = wordings[0];99 }100 else if (diff.minutes < 60)101 {102 result = wordings[1].replace(/\{{2}.\}{2}/, Math.floor(diff.minutes));103 }104 else if (diff.hours < maxHours)105 {106 result = wordings[2].replace(/\{{2}.\}{2}/, Math.floor(diff.hours));107 }108 else if (diff.days < dayWordings.length)109 {110 result = dayWordings[diff.days] + " " + pastDate.toIsoFormatText("HN");111 }112 else113 {114 result = pastDate.toIsoFormatText();115 };116 return result;117 };118 function _getLocalStorageData()119 {120 let result = [];121 for (let key in localStorage)122 {123 if (/^(?=\D*\d)[\d\w]{6}$/.test(key) === true)124 {125 let storedData = JSON.parse(localStorage[key]);126 let lastModifiedDate = new Date().fromIsoString(storedData.date);127 result.push(128 {129 pid: key,130 'warband-name': storedData.title,131 'figure-count': storedData["figure-count"],132 points: storedData.points,133 'last-modified': lastModifiedDate,134 'last-modified-text': _naturalPast(lastModifiedDate)135 }136 );137 };138 };139 switch (restorer.sort.field)140 {141 case "warband-name":142 result.sort((a, b) => (a["warband-name"].localeCompare(b["warband-name"]) * restorer.sort.direction));143 break;144 default:145 result.sort((a, b) => (((a[restorer.sort.field] < b[restorer.sort.field]) ? 1 : -1) * restorer.sort.direction));146 };147 return result;148 };149 let refNode = document.getElementById("restorer-table-frame");150 let variables =151 {152 'cached-warbands': _getLocalStorageData()153 };154 const thresholdWidth = 400;155 let snippetName = (Number(document.body.clientWidth) <= thresholdWidth) ? "table-frame-small" : "table-frame-normal";156 owc.ui.setElementContent(refNode, pageSnippets.restorer[snippetName].produce(restorer, variables));...

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Using AI Code Generation

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1var sinon = require('sinon');2var assert = require('assert');3var myObj = {4 myMethod: function () {5 console.log('myMethod was called');6 }7};8var spy = sinon.spy(myObj, 'myMethod');9myObj.myMethod();10assert(spy.called);11spy.restore();12myObj.myMethod();13assert(!spy.called);

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Using AI Code Generation

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1var sinon = require('sinon');2var obj = {3 method: function () {}4};5var spy = sinon.spy(obj, "method");6obj.method(42);7obj.method.restore();8obj.method(42);

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Using AI Code Generation

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1var sinon = require('sinon');2var chai = require('chai');3var expect = chai.expect;4describe('Restorer', function () {5 it('should restore the stubbed method', function () {6 var stub = sinon.stub(console, 'log');7 console.log('hello');8 expect(stub.calledOnce).to.be.true;9 stub.restore();10 console.log('hello');11 expect(stub.calledTwice).to.be.false;12 });13});14var sinon = require('sinon');15var chai = require('chai');16var expect = chai.expect;17describe('Restorer', function () {18 it('should restore the stubbed method', function () {19 var stub = sinon.stub(console, 'log');20 console.log('hello');21 expect(stub.calledOnce).to.be.true;22 stub.restore();23 console.log('hello');24 expect(stub.calledTwice).to.be.false;25 });26});27var sinon = require('sinon');28var chai = require('chai');29var expect = chai.expect;30describe('Restorer', function () {31 it('should restore the stubbed method', function () {32 var stub = sinon.stub(console, 'log');33 console.log('hello');34 expect(stub.calledOnce).to.be.true;35 stub.restore();36 console.log('hello');37 expect(stub.calledTwice).to.be.false;38 });39});40var sinon = require('sinon');41var chai = require('chai');42var expect = chai.expect;43describe('Restorer', function () {44 it('should restore the stubbed method', function () {45 var stub = sinon.stub(console, 'log');46 console.log('hello');47 expect(stub.calledOnce).to.be.true;48 stub.restore();49 console.log('hello');50 expect(stub.calledTwice).to.be.false;51 });52});53var sinon = require('sinon');54var chai = require('chai');55var expect = chai.expect;56describe('Restorer', function () {57 it('should restore the stubbed method', function () {58 var stub = sinon.stub(console, 'log');59 console.log('

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Using AI Code Generation

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1var sinon = require('sinon');2var assert = require('assert');3var myObj = {4 method: function () {5 console.log("Method called");6 }7};8var stub = sinon.stub(myObj, "method");9stub();10stub.restore();11stub();12var sinon = require('sinon');13var assert = require('assert');14var myObj = {15 method: function () {16 console.log("Method called");17 }18};19var stub = sinon.stub(myObj, "method");20stub();21stub.restore();22stub();23var sinon = require('sinon');24var assert = require('assert');25var myObj = {26 method: function () {27 console.log("Method called");28 }29};30var stub = sinon.stub(myObj, "method");31stub();32stub.restore();33stub();34var sinon = require('sinon');35var assert = require('assert');36var myObj = {37 method: function () {38 console.log("Method called");39 }40};41var stub = sinon.stub(myObj, "method");42stub();43stub.restore();44stub();45var sinon = require('sinon');46var assert = require('assert');47var myObj = {48 method: function () {49 console.log("Method called");50 }51};52var stub = sinon.stub(myObj, "method");53stub();54stub.restore();55stub();56var sinon = require('sinon');57var assert = require('assert');58var myObj = {59 method: function () {60 console.log("Method called");61 }62};63var stub = sinon.stub(myObj, "method");64stub();65stub.restore();66stub();67var sinon = require('sinon');68var assert = require('assert');69var myObj = {70 method: function ()

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Using AI Code Generation

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1const sinon = require('sinon');2const fs = require('fs');3const readFile = sinon.stub(fs, 'readFile');4readFile.withArgs('hello.txt').yields(null, 'Hello');5readFile.withArgs('goodbye.txt').yields(null, 'Goodbye');6sinon.fake.restore();7const sinon = require('sinon');8const fs = require('fs');9const readFile = sinon.stub(fs, 'readFile');10readFile.withArgs('hello.txt').yields(null, 'Hello');11readFile.withArgs('goodbye.txt').yields(null, 'Goodbye');12sinon.fake.restore();13const sinon = require('sinon');14const fs = require('fs');15const readFile = sinon.stub(fs, 'readFile');16readFile.withArgs('hello.txt').yields(null, 'Hello');17readFile.withArgs('goodbye.txt').yields(null, 'Goodbye');18sinon.fake.restore();19const sinon = require('sinon');20const fs = require('fs');21const readFile = sinon.stub(fs, 'readFile');22readFile.withArgs('hello.txt').yields(null, 'Hello');23readFile.withArgs('goodbye.txt').yields(null, 'Goodbye');24sinon.fake.restore();25const sinon = require('sinon');26const fs = require('fs');27const readFile = sinon.stub(fs, 'readFile');28readFile.withArgs('hello.txt').yields(null, 'Hello');29readFile.withArgs('goodbye.txt').yields(null, 'Goodbye');30sinon.fake.restore();31const sinon = require('sinon');32const fs = require('fs');33const readFile = sinon.stub(fs, 'readFile');

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Using AI Code Generation

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1const sinon = require('sinon');2const assert = require('assert');3const {getUsers} = require('./user');4describe('getUsers', () => {5 it('should return users', () => {6 const stub = sinon.stub().returns([1, 2, 3]);7 const users = getUsers(stub);8 assert.deepEqual(users, [1, 2, 3]);9 });10 it('should call callback', () => {11 const stub = sinon.stub().returns([1, 2, 3]);12 getUsers(stub);13 assert(stub.calledOnce);14 });15});

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Using AI Code Generation

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1const sinon = require('sinon');2const assert = require('assert');3const { EventEmitter } = require('events');4const { once } = require('events');5const emitter = new EventEmitter();6const stub = sinon.stub().resolves(42);7emitter.on('foo', stub);8emitter.emit('foo', 'bar');9assert(stub.calledOnceWith('bar'));10const sinon = require('sinon');11const assert = require('assert');12const { EventEmitter } = require('events');13const { once } = require('events');14const emitter = new EventEmitter();15const stub = sinon.stub().resolves(42);16emitter.on('foo', stub);17emitter.emit('foo', 'bar');18assert(stub.calledOnceWith('bar'));19stub.restore();

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