Join the 1-day Testing & QA Summit featuring 15+ Expert Speakers.Register for FREE! Join TestMu Conference

How to use isNonExistentProperty method in sinon

Best JavaScript code snippet using sinon

stub.js

Source:stub.js

...55    if (isEsModule(object)) {56        throw new TypeError("ES Modules cannot be stubbed");57    }58    throwOnFalsyObject.apply(null, arguments);59    if (isNonExistentProperty(object, property)) {60        throw new TypeError("Cannot stub non-existent property " + valueToString(property));61    }62    var actualDescriptor = getPropertyDescriptor(object, property);63    var isObjectOrFunction = typeof object === "object" || typeof object === "function";64    var isStubbingEntireObject = typeof property === "undefined" && isObjectOrFunction;65    var isCreatingNewStub = !object && typeof property === "undefined";66    var isStubbingNonFuncProperty =67        isObjectOrFunction &&68        typeof property !== "undefined" &&69        (typeof actualDescriptor === "undefined" || typeof actualDescriptor.value !== "function");70    if (isStubbingEntireObject) {71        return walkObject(stub, object);72    }73    if (isCreatingNewStub) {...

is-non-existent-property.js

Source:is-non-existent-property.js

...3 * @param {*} object4 * @param {String} property5 * @returns whether a prop exists in the prototype chain6 */7function isNonExistentProperty(object, property) {8    return object && typeof property !== "undefined" && !(property in object);9}...

Using AI Code Generation

1var chai = require('chai');2var sinon = require('sinon');3var sinonChai = require('sinon-chai');4chai.use(sinonChai);5chai.should();6var obj = {7    method: function () {8        return 'test';9    }10};11describe('sinon-chai', function () {12    it('should work', function () {13        var spy = sinon.spy(obj, 'method');14        obj.method();15        spy.should.have.been.calledOnce;16        spy.should.have.been.calledWith();17        spy.should.have.been.calledOn(obj);18        spy.should.have.returned('test');19        spy.should.have.been.calledBefore(sinon.stub());20        spy.should.have.been.calledAfter(sinon.stub());21        spy.should.have.been.calledImmediatelyBefore(sinon.stub());22        spy.should.have.been.calledImmediatelyAfter(sinon.stub());23        spy.should.have.been.calledWithNew();24        spy.should.have.been.calledWithExactly();25        spy.should.have.been.calledWithMatch();26        spy.should.have.been.calledWithExactlyMatch();27        spy.should.have.been.calledWithExactlyMatch();28        spy.should.have.been.calledOnceWithExactly();29        spy.should.have.been.calledOnceWithMatch();30        spy.should.have.been.calledOnceWithExactlyMatch();31        spy.should.have.been.calledTwice();32        spy.should.have.been.calledThrice();33        spy.should.have.been.calledOn(sinon.stub());

Using AI Code Generation

1var obj = {foo: 'bar'};2assert.isNonExistentProperty(obj, 'foo');3assert.isNonExistentProperty(obj, 'bar');4assert.isNonExistentProperty(obj, 'baz');5var obj = {foo: 'bar'};6assert.isNonExistentProperty(obj, 'foo');7assert.isNonExistentProperty(obj, 'bar');8assert.isNonExistentProperty(obj, 'baz');9var obj = {foo: 'bar'};10assert.isNonExistentProperty(obj, 'foo');11assert.isNonExistentProperty(obj, 'bar');12assert.isNonExistentProperty(obj, 'baz');13var obj = {foo: 'bar'};14assert.isNonExistentProperty(obj, 'foo');15assert.isNonExistentProperty(obj, 'bar');16assert.isNonExistentProperty(obj, 'baz');17var obj = {foo: 'bar'};18assert.isNonExistentProperty(obj, 'foo');19assert.isNonExistentProperty(obj, 'bar');20assert.isNonExistentProperty(obj, 'baz');21var obj = {foo: 'bar'};22assert.isNonExistentProperty(obj, 'foo');23assert.isNonExistentProperty(obj, 'bar');24assert.isNonExistentProperty(obj, 'baz');25var obj = {foo: 'bar'};26assert.isNonExistentProperty(obj, 'foo');27assert.isNonExistentProperty(obj, 'bar');28assert.isNonExistentProperty(obj, 'baz');29var obj = {foo: 'bar'};30assert.isNonExistentProperty(obj, 'foo');31assert.isNonExistentProperty(obj, 'bar');32assert.isNonExistentProperty(obj, 'baz');

Using AI Code Generation

1var sinon = require('sinon');2var obj = {3  method: function() {}4};5sinon.stub(obj, "method");6delete stub.isSinonProxy;7function stub(object, property, func) {8    var wrapper = function () {9        return wrapper.invoke(func, this, arguments);10    };11    if (typeof property !== "undefined" && typeof object !== "undefined") {12        var method = object[property];13        wrapper.displayName = property;14        wrapper.toString = function toString() {15            return method.toString();16        };17        wrapper.restore = function restore() {18            object[property] = method;19        };20        wrapper.invoke = function invoke(func, thisValue, args) {21            return (func || method).apply(thisValue, args);22        };23        wrapper.property = property;24        wrapper.object = object;25        object[property] = wrapper;26    } else {27        wrapper.restore = function restore() {28            throw new Error("Cannot restore unstubbed function");29        };30        wrapper.invoke = function invoke(func, thisValue, args) {31            return (func || function () {}).apply(thisValue, args);32        };33    }34    delete wrapper.isSinonProxy;35    return wrapper;36}37function stub(object, property, func) {38    var wrapper = function () {39        return wrapper.invoke(func, this, arguments);40    };41    if (typeof property !== "undefined" && typeof object !== "undefined") {42        var method = object[property];43        wrapper.displayName = property;44        wrapper.toString = function toString() {45            return method.toString();46        };47        wrapper.restore = function restore() {

Using AI Code Generation

1var sinon = require('sinon');2var assert = require('assert');3var obj = { foo: 'bar' };4var spy = sinon.spy(obj, 'foo');5assert.ok(spy.isSinonProxy);6assert.ok(spy.isNonExistentProperty);7spy.restore();8assert.ok(!spy.isSinonProxy);9assert.ok(!spy.isNonExistentProperty);

Using AI Code Generation

1var sinon = require('sinon');2var obj = { foo: 'bar' };3var spy = sinon.spy();4obj.baz = spy;5obj.baz();6console.log(spy.always

Using AI Code Generation

1var sinon = require('sinon');2var obj = {3    method: function() {}4};5sinon.stub(obj, "method").returns(42);6sinon.stub(obj, "method").returns(43);7sinon.stub(obj, "method").returns(44);8var stub = sinon.stub(obj, "method");9stub.returns(42);10stub.returns(43);11stub.returns(44);12var sinon = require('sinon');13var obj = {14    method: function() {}15};16sinon.stub(obj, "method").returns(42);17sinon.stub(obj, "method").returns(43);18sinon.stub(obj, "method").returns(44);19var stub = sinon.stub(obj, "method");20stub.returns(42);21stub.returns(43);22stub.returns(44);23var obj = {24    method: function() {}25};26sinon.stub(obj, "method").returns(42);27sinon.stub(obj, "method").returns(43);28sinon.stub(obj, "method").returns(44);29var stub = sinon.stub(obj, "method");30stub.returns(42);31stub.returns(43);32stub.returns(44);33var obj = {34    method: function() {}35};36sinon.stub(obj, "method").returns(42);37sinon.stub(obj, "method").returns(43);38sinon.stub(obj, "method").returns(44);39var stub = sinon.stub(obj, "method");40stub.returns(42);41stub.returns(43);42stub.returns(44);

Using AI Code Generation

1var sinon = require('sinon');2var myFunc = function(){3  return 'Hello World';4}5var spy = sinon.spy(myFunc);6spy();7console.log(spy.calledWith('Hello World',

Automation Testing Tutorials

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.