Tips for creating basic Jasmine and Karma tests for an Angular application to add an object to an array of objects

I have developed a basic Angular project for managing employee data and I'm looking to test the addProduct function. Can someone guide me on how to write a test case for this scenario? I am not using a service, just a simple push operation. Any assistance would be greatly appreciated.

public products = [{
     name:"iPhone 12",
     quantity:5
  },
  {
     name:"Samsung TV",
     quantity:1 
  }];

  addProduct(name: string,quantity:number) {

      var item = {name:name, quantity:quantity};
      this.products.push(item);

  }
javascriptangulartypescriptjasminekarma-jasmine

Answer №1

@shashank Vivek, I really appreciate your input. The code snippet below proved to be successful for me when testing the functionality of adding a product. It allowed us to verify whether the new product was successfully added to the existing array of objects.

it('should be created', () => {
  component.products.length = 2;
  component.addproduct("test",1);  
  expect(component.products.length).toBe(3);
  expect(component.products[2].name).toBe("test");
});

Answer №2

If you want to test out these functions, give this code block a try:


it('should be created', () => {
  component.products.length = 2;
  component.addproduct("test",1);  
  expect(component.products.length).toBe(3);
  expect(component.products[2].name).toBe("test");
});

Since Angular testing may be new to you, I highly suggest checking out this article that provides additional resources in the last paragraph.

This read will certainly simplify testing for you, making it easy yet efficient.

Enjoy Testing!

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Changing text on a button with JavaScript toggle functionality: A step-by-step guide

I am looking to implement a feature where I can hide and show overflow content in a div. When I click on the expand button, it expands the content. However, I want this button to toggle and change text as well. Thank you! function descriptionHeightMo ...

javascriptjqueryhtmlcss

Determining the scroll position of a JQuery Mobile collapsible set upon expansion

I am utilizing jQueryMobile (v1.4.0) collapsible set / accordions to showcase a list of elements along with their content, which can be seen in this jsFiddle. <div id="List" data-role="collapsible-set"> <div data-role="collapsible" data-conte ...

javascriptjquery-mobilemobilescrolljquery-mobile-collapsible

Sorting arrays in JavaScript can become tricky when dealing with arrays that contain values from two different arrays

When working with two arrays in JavaScript that are received from PHP, I combine them into a single array. Each element in these arrays contains a created_at value (from Laravel), and I want to sort these elements by their created_at values. The issue ari ...

javascriptarraysvue.js

Repeating every other item in a list using ng-repeat in AngularJS

Using AngularJS version 1.5.3 In my view, I have a list of items that I want to display. After every two items, I would like to show a new div below the first one. <div class="col text-center" ng-repeat="event in weekDay.events"> &nbsp;& ...

javascriptangularjsangularjs-ng-repeat

Analyzing the DOM content loading time for web pages generated using AJAX technology

When analyzing website performance, I rely on window.performance.timing. However, this method falls short when it comes to measuring the performance of webpages loaded through ajax calls. For instance, websites built with frameworks like angularjs often lo ...

javascriptajax

Configuring Firefox settings in Nightwatch

Is there a way to set Firefox preferences in nightwatch? I am trying to achieve the same thing in Java using nightwatch. To set Firefox preferences in nightwatch, you can use the following code snippet: FirefoxProfile profile = new FirefoxProfile(); prof ...

javascriptfirefoxseleniumselenium-webdrivernightwatch.js

Populate input fields in HTML using Angular 4

Within my angular 4 project, I am facing the challenge of setting a value in an input field and in a MatSelect without relying on any binding. Here is the HTML structure: <div class="row search-component"> <div class="col-md-5 no-padding-rig ...

angulartypescript

Mastering checkbox selection in Angular reactive formsLearn how to effortlessly manage the checked status of

I am struggling with setting the checked status of a checkbox control within an Angular reactive form. My goal is to change the value based on the checked status, but it seems like the value is controlling the status instead. For instance, I want the for ...

angularangular-reactive-forms

What is the method for retrieving the fixed information?

I am currently working on a project that involves creating a course-rating API. We have been given a completed angular application to work with, and our task is to set up the routes without making any changes to the Angular app. One of the initial tasks a ...

javascriptangularjsnode.jsmongodbexpress

Creating an infinite loop animation using GSAP in React results in a jarring interruption instead of a smooth and seamless transition

I'm currently developing a React project where I am aiming to implement an infinite loop animation using GSAP. The concept involves animating a series of elements from the bottom left corner to the top right corner. The idea is for the animation to sm ...

javascriptreactjsanimationnext.jsgsap

Fetching from the same origin results in a null comparison issue due to HTTP CORS restrictions

Encountering an issue where a simple same-origin fetch("fetch.xml") call fails, resulting in a console error message Access to fetch at 'http://127.0.0.1:8000/fetch.xml' from origin 'null' has been blocked by CORS policy: Th ...

javascripthttpcors

Troubleshooting Issue with Ionic's UI Router

Recently, I created a basic Ionic app to gain a better understanding of UI router functionality. To my surprise, when I ran the app, nothing appeared on the screen. Additionally, the developer tools in Google Chrome did not show any errors or information. ...

javascripthtmlangularjsionic-framework

One-way communication between two clients using Socket.io

While working on a basic socket.io application using React and Express, I've encountered an issue where two clients are facing difficulties in sending data to each other. For instance: Player 1 connects to the server followed by Player 2. Player 1 ...

javascriptnode.jsreactjsexpresssocket.io

`Is there a way to maintain my AWS Amplify login credentials while executing Cypress tests?`

At the moment, I am using a beforeEach() function to log Cypress in before each test. However, this setup is causing some delays. Is there a way for me to keep the user logged in between tests? My main objective is to navigate through all the pages as the ...

typescriptcypressaws-amplify

Tips for modifying environment variables for development and production stages

I am looking to deploy a React app along with a Node server on Heroku. It seems that using create-react-app should allow me to determine if I'm in development or production by using process.env.NODE_ENV. However, I always seem to get "development" ev ...

javascriptnode.jsreactjsenvironment-variables

What steps should I take to incorporate this feature into my Meteor project?

After successfully installing the type.js package, I discovered that the code works fine when directly executed in the console. Here is the code snippet: $(function(){ $(".typedelement").typed({ strings: ["You don&apo ...

javascriptjquerymeteor

Organizing elements in a javascript array by their attributes using AngularJS

Picture this scenario: a collection of different wines: [ { "name":"wine A", "category":[ "red", "merlot" ] }, { "name":"wine B", "category":[ "white", "chardonnay" ...

javascriptarraysangularjsjsongrouping

Transferring an array of interfaces between Angular 2 components

Encountering issues with passing an Array of data between components using @Input. Here is the code snippet: public ngOnInit() { this.applications = new Array<ApplicationEntryInterface>(); (...) let shortTermData = new ShortTermApplicationAdapte ...

arraysangulartypescriptinterface

Receive live feedback from shell_exec command as it runs

I have been working on a PHP-scripted web page that takes the filename of a previously uploaded JFFS2 image on the server. The goal is to flash a partition with this image and display the results. Previously, I had used the following code: $tmp = shell_ex ...

phpjavascriptajaxbash

several javascript onclick event listeners for manipulating the DOM

I am currently experimenting with d3 and attempting to create a simple webpage to showcase my d3 examples for future reference. The page displays the output of the d3 code (specifically, the force layout from Mike Bostock) and then embeds the correspondin ...

javascriptjquery