Best JavaScript code snippet using sinon
spy_test.js
Source:spy_test.js  
...1192                var spy = sinon.spy();1193                var callback = sinon.spy();1194                spy(1, 2, callback);1195                spy(3, 4, callback);1196                spy.callArg(2);1197                assert(callback.calledTwice);1198                assert(callback.alwaysCalledWith());1199            },1200            "throws if argument at index is not a function": function () {1201                var spy = sinon.spy();1202                spy();1203                assert.exception(function () {1204                    spy.callArg(1);1205                }, "TypeError");1206            },1207            "throws if spy was not yet invoked": function () {1208                var spy = sinon.spy();1209                try {1210                    spy.callArg(0);1211                    throw new Error();1212                } catch (e) {1213                    assert.equals(e.message, "spy cannot call arg since it was not yet invoked.");1214                }1215            },1216            "includes spy name in error message": function () {1217                var api = { someMethod: function () {} };1218                var spy = sinon.spy(api, "someMethod");1219                try {1220                    spy.callArg(0);1221                    throw new Error();1222                } catch (e) {1223                    assert.equals(e.message, "someMethod cannot call arg since it was not yet invoked.");1224                }1225            },1226            "throws if index is not a number": function () {1227                var spy = sinon.spy();1228                spy();1229                assert.exception(function () {1230                    spy.callArg("");1231                }, "TypeError");1232            },1233            "passs additional arguments": function () {1234                var spy = sinon.spy();1235                var callback = sinon.spy();1236                var array = [];1237                var object = {};1238                spy(callback);1239                spy.callArg(0, "abc", 123, array, object);1240                assert(callback.calledWith("abc", 123, array, object));1241            }1242        },1243        "callArgOn": {1244            "is function": function () {1245                var spy = sinon.spy();1246                assert.isFunction(spy.callArgOn);1247            },1248            "invokes argument at index for all calls": function () {1249                var spy = sinon.spy();1250                var callback = sinon.spy();1251                var thisObj = { name1: "value1", name2: "value2" };1252                spy(1, 2, callback);1253                spy(3, 4, callback);1254                spy.callArgOn(2, thisObj);1255                assert(callback.calledTwice);1256                assert(callback.alwaysCalledWith());1257                assert(callback.alwaysCalledOn(thisObj));1258            },1259            "throws if argument at index is not a function": function () {1260                var spy = sinon.spy();1261                var thisObj = { name1: "value1", name2: "value2" };1262                spy();1263                assert.exception(function () {1264                    spy.callArgOn(1, thisObj);1265                }, "TypeError");1266            },1267            "throws if spy was not yet invoked": function () {1268                var spy = sinon.spy();1269                var thisObj = { name1: "value1", name2: "value2" };1270                try {1271                    spy.callArgOn(0, thisObj);1272                    throw new Error();1273                } catch (e) {1274                    assert.equals(e.message, "spy cannot call arg since it was not yet invoked.");1275                }1276            },1277            "includes spy name in error message": function () {1278                var api = { someMethod: function () {} };1279                var spy = sinon.spy(api, "someMethod");1280                var thisObj = { name1: "value1", name2: "value2" };1281                try {1282                    spy.callArgOn(0, thisObj);1283                    throw new Error();1284                } catch (e) {1285                    assert.equals(e.message, "someMethod cannot call arg since it was not yet invoked.");1286                }1287            },1288            "throws if index is not a number": function () {1289                var spy = sinon.spy();1290                var thisObj = { name1: "value1", name2: "value2" };1291                spy();1292                assert.exception(function () {1293                    spy.callArg("", thisObj);1294                }, "TypeError");1295            },1296            "pass additional arguments": function () {1297                var spy = sinon.spy();1298                var callback = sinon.spy();1299                var array = [];1300                var object = {};1301                var thisObj = { name1: "value1", name2: "value2" };1302                spy(callback);1303                spy.callArgOn(0, thisObj, "abc", 123, array, object);1304                assert(callback.calledWith("abc", 123, array, object));1305                assert(callback.calledOn(thisObj));1306            }1307        },...Using AI Code Generation
1var sinon = require('sinon');2var myObj = {3    myMethod: function (callback) {4        callback();5    }6};7var spy = sinon.spy(myObj, "myMethod");8myObj.myMethod(function () {9    console.log('callback called');10});11spy.callArg(0);12var sinon = require('sinon');13var myObj = {14    myMethod: function (callback) {15        callback();16    }17};18var spy = sinon.spy(myObj, "myMethod");19myObj.myMethod(function () {20    console.log('callback called');21});22spy.callArgWith(0, 1, 2, 3);23var sinon = require('sinon');24var myObj = {25    myMethod: function (callback) {26        callback();27    }28};29var spy = sinon.spy(myObj, "myMethod");30myObj.myMethod(function () {31    console.log('callback called');32});33spy.callArgOn(0, myObj, 1, 2, 3);34var sinon = require('sinon');35var myObj = {36    myMethod: function (callback) {37        callback();38    }39};40var spy = sinon.spy(myObj, "myMethod");41myObj.myMethod(function () {42    console.log('callback called');43});44spy.callArgOnWith(0, myObj, 1, 2, 3);45var sinon = require('sinon');46var myObj = {47    myMethod: function (callback) {48        callback();49    }50};51var spy = sinon.spy(myObj, "myMethod");52myObj.myMethod(function () {53    console.log('callback called');54});55spy.callArgWith(0, 1, 2, 3);Using AI Code Generation
1var sinon = require('sinon');2var assert = require('assert');3var myObj = {4    myFunc: function (cb) {5        cb();6    }7};8var spy = sinon.spy(myObj, 'myFunc');9myObj.myFunc(function () {10    console.log('callback called');11});12spy.callArg(0);13assert(spy.calledOnce);14assert(spy.calledWithExactly(sinon.match.func));15var spy = sinon.spy(myObj, 'myFunc');16myObj.myFunc(function (a, b) {17    console.log(a, b);18});19spy.callArgWith(0, 1, 2);20assert(spy.calledOnce);21assert(spy.calledWithExactly(sinon.match.func));22var spy = sinon.spy(myObj, 'myFunc');23myObj.myFunc(function (a, b) {24    console.log(this, a, b);25});26spy.callArgOnWith(0, { name: 'John' }, 1, 2);27assert(spy.calledOnce);28assert(spy.calledWithExactly(sinon.match.func));Using AI Code Generation
1var sinon = require('sinon');2var assert = require('assert');3var myObj = {4    myMethod: function (callback) {5        callback();6    }7};8var spy = sinon.spy(myObj, 'myMethod');9assert(spy.returnValues[0] === undefinedUsing AI Code Generation
1var sinon = require('sinon');2var expect = require('chai').expect;3var EventEmitter = require('events').EventEmitter;4describe('A spy', function() {5    var spy, emitter;6    beforeEach(function() {7        spy = sinon.spy();8        emitter = new EventEmitter();9    });10    it('should be called when an event is emitted', function() {11        emitter.on('foo', spy);12        emitter.emit('foo');13        expect(spy.called).to.be.true;14    });15    it('should be called with the right arguments', function() {16        emitter.on('foo', spy);17        emitter.emit('foo', 'bar', 'baz');18        expect(spy.calledWith('bar', 'baz')).to.be.true;19    });20    it('should be able to call the original method', function() {21        emitter.on('foo', spy);22        emitter.emit('foo');23        spy.restore();24        expect(spy.called).to.be.false;25    });26    it('should be able to call the original method with the right arguments', function() {27        emitter.on('foo', spy);28        emitter.emit('foo', 'bar', 'baz');29        spy.restore();30        emitter.emit('foo', 'bar', 'baz');31        expect(spy.calledWith('bar', 'baz')).to.be.true;32    });33    it('should be able to call the original method with the right context', function() {34        var obj = {35        };36        emitter.on('foo', obj.foo);37        emitter.emit('foo');38        spy.restore();39        emitter.emit('foo');40        expect(spy.calledOn(obj)).to.be.true;41    });42    it('should be able to call the original method with the right context and arguments', function() {43        var obj = {44        };45        emitter.on('foo', obj.foo);46        emitter.emit('foo', 'bar', 'baz');47        spy.restore();48        emitter.emit('foo', 'bar', 'baz');49        expect(spy.calledOn(obj)).to.be.true;50        expect(spy.calledWith('bar', 'baz')).to.be.true;51    });52    it('should be able to call the original method with the right context and arguments', function() {53        var obj = {54        };55        emitter.on('foo', obj.foo);56        emitter.emit('foo', 'bar', 'baz');57        spy.restore();Using AI Code Generation
1var sinon = require('sinon');2var assert = require('assert');3var myModule = require('./myModule');4var myModuleInstance = new myModule();5var myCallback = sinon.spy();6myModuleInstance.myMethod(myCallback);7assert(myCallback.calledOnce);8assert(myCallback.calledWith('foo', 'bar'));9var myModule = function() {10};11myModule.prototype.myMethod = function(callback) {12    callback('foo', 'bar');13};14module.exports = myModule;15var sinon = require('sinon');16var assert = require('assert');17var myModule = require('./myModule');18var myModuleInstance = new myModule();19var myCallback = sinon.spy();20myModuleInstance.myMethod(myCallback);21assert(myCallback.calledOnce);22assert(myCallback.calledWith('foo', 'bar'));23var myModule = function() {24};25myModule.prototype.myMethod = function(callback) {26    callback('foo', 'bar');27};28module.exports = myModule;29var sinon = require('sinon');30var assert = require('assert');31var myModule = require('./myModule');32var myModuleInstance = new myModule();33var myCallback = sinon.spy();34myModuleInstance.myMethod(myCallback);35assert(myCallback.calledOnce);36assert(myCallback.calledWith('foo', 'bar'));37var myModule = function() {38};39myModule.prototype.myMethod = function(callback) {40    callback('foo', 'bar');41};42module.exports = myModule;43var sinon = require('sinon');44var assert = require('assert');45var myModule = require('./myModule');46var myModuleInstance = new myModule();47var myCallback = sinon.spy();48myModuleInstance.myMethod(myCallback);49assert(myCallback.calledOnce);50assert(myCallback.calledWith('foo', 'bar'));51var myModule = function() {52};53myModule.prototype.myMethod = function(callback) {54    callback('foo', 'bar');55};56module.exports = myModule;Using AI Code Generation
1var spy = sinon.spy();2spy(function() { console.log('Hello'); });3spy.callArg(0);4var spy = sinon.spy();5spy(function() { console.log('Hello'); });6spy.callArgOn(0, null);7var spy = sinon.spy();8spy(function() { console.log('Hello'); });9spy.callArgWith(0, 'Hello');10var spy = sinon.spy();11spy(function() { console.log('Hello'); });12spy.callArgOnWith(0, null, 'Hello');13var spy = sinon.spy();14spy(function() { console.log('Hello'); });15spy.callThrough();16var spy = sinon.spy();17spy(function() { console.log('Hello'); });18spy.callFake(function() { console.log('Hello World'); });19var spy = sinon.spy();20spy(function() { console.log('Hello'); });21spy.callFake(function() { console.loUsing AI Code Generation
1var sinon = require('sinon');2var assert = require('assert');3var myModule = require('./myModule');4var myModuleObj = new myModule();5var callback = sinon.spy();6myModuleObj.myMethod('test', callback);7assert(callback.called);8assert(callback.calledWith('test'));9assert(callback.calledWith('test', 'test2'));10assert(callback.calledWith('test', 'test2', 'test3'));11assert(callback.calledWith('test', 'test2', 'test3', 'test4'));12assert(callback.calledWith('test', 'test2', 'test3', 'test4', 'test5'));13module.exports = function() {14    this.myMethod = function(a, callback) {15        callback(a, 'test2', 'test3', 'test4', 'test5');16    }17}18var sinon = require('sinon');19var assert = require('assert');20var chai = require('chai');21var expect = chai.expect;22var express = require('express');23var app = express();24var router = express.Router();25var routes = require('./routes')(router);26app.use('/', routes);27var req = {};28var res = {Using AI Code Generation
1var sinon = require('sinon');2var assert = require('assert');3describe('test', function() {4    it('test', function() {5        var callback = sinon.spy();6        var callback2 = sinon.spy();7        var callback3 = sinon.spy();8        var callback4 = sinon.spy();9        var callback5 = sinon.spy();10        var callback6 = sinon.spy();11        var callback7 = sinon.spy();12        var callback8 = sinon.spy();13        var callback9 = sinon.spy();14        var callback10 = sinon.spy();15        var callback11 = sinon.spy();16        var callback12 = sinon.spy();17        var callback13 = sinon.spy();18        var callback14 = sinon.spy();19        var callback15 = sinon.spy();20        var callback16 = sinon.spy();21        var callback17 = sinon.spy();22        var callback18 = sinon.spy();23        var callback19 = sinon.spy();24        var callback20 = sinon.spy();25        var callback21 = sinon.spy();26        var callback22 = sinon.spy();27        var callback23 = sinon.spy();28        var callback24 = sinon.spy();29        var callback25 = sinon.spy();30        var callback26 = sinon.spy();31        var callback27 = sinon.spy();32        var callback28 = sinon.spy();33        var callback29 = sinon.spy();34        var callback30 = sinon.spy();35        var callback31 = sinon.spy();36        var callback32 = sinon.spy();37        var callback33 = sinon.spy();38        var callback34 = sinon.spy();39        var callback35 = sinon.spy();40        var callback36 = sinon.spy();41        var callback37 = sinon.spy();42        var callback38 = sinon.spy();43        var callback39 = sinon.spy();44        var callback40 = sinon.spy();45        var callback41 = sinon.spy();46        var callback42 = sinon.spy();47        var callback43 = sinon.spy();48        var callback44 = sinon.spy();49        var callback45 = sinon.spy();50        var callback46 = sinon.spy();51        var callback47 = sinon.spy();52        var callback48 = sinon.spy();53        var callback49 = sinon.spy();54        var callback50 = sinon.spy();55        var callback51 = sinon.spy();56        var callback52 = sinon.spy();57        var callback53 = sinon.spy();58        var callback54 = sinon.spy();59        var callback55 = sinon.spy();60        var callback56 = sinon.spy();61        var callback57 = sinon.spy();Using AI Code Generation
1describe('test', function() {2    it('should call the callback', function() {3        var callback = sinon.spy();4        callback('test');5        expect(callback.calledWith('test')).to.be.true;6    });7});8describe('test', function() {9    it('should call the callback', function() {10        var callback = sinon.spy();11        callback('test');12        expect(callback.calledWith('test')).to.be.true;13    });14});15describe('test', function() {16    it('should call the callback', function() {17        var callback = sinon.spy();18        callback('test');19        expect(callback.calledWith('test')).to.be.true;20    });21});22describe('test', function() {23    it('should call the callback', function() {24        var callback = sinon.spy();25        callback('test');26        expect(callback.calledWith('test')).to.be.true;27    });28});Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.
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