How to test AngularJS directive?
Table of Contents
How to test AngularJS directive?
If a directive creates its own scope and you want to test against it, you can get access to that directive’s scope by doing var directiveScope = myElement. children(). scope() – It will get the element’s child (the directive itself), and get the scope for that. For testing timeouts, you can use $timeout.
How to do unit testing in AngularJS?
Testing in AngularJS is achieved by using the karma framework, a framework which has been developed by Google itself. The karma framework is installed using the node package manager. The key modules which are required to be installed for basic testing are karma, karma-chrome-launcher ,karma-jasmine, and karma-cli.
How to write directive in AngularJS?
In addition to all the built-in AngularJS directives, you can create your own directives. New directives are created by using the . directive function. To invoke the new directive, make an HTML element with the same tag name as the new directive….You can invoke a directive by using:
- Element name.
- Attribute.
- Class.
- Comment.
What is attrs in AngularJS?
Using attrs you are able to access the attributes defined in your html tag like So in this case you will have access to the symbol and readonly attributes.
How do I test a promise in AngularJS?
Unit-test promise-based code in Angularjs
- when markAsDone is called it should call tasksService. removeAndGetNext.
- when tasksService. removeAndGetNext is done it should change location (invoke goTo )
What is Angular unit testing?
Angular component testing means to check the quality and performance of your components. Angular component testing can be done manually by running the application yourself and checking to see if a component’s behavior is working as expected.
What is attr in Angular?
Attribute binding in Angular helps you set values for attributes directly. With attribute binding, you can improve accessibility, style your application dynamically, and manage multiple CSS classes or styles simultaneously.
What is $observe in AngularJS?
$observe() is a method on the Attributes object, and as such, it can only be used to observe/watch the value change of a DOM attribute. It is only used/called inside directives. Use $observe when you need to observe/watch a DOM attribute that contains interpolation (i.e., {{}}’s).
What is $q in AngularJS?
$q is integrated with the $rootScope. Scope Scope model observation mechanism in AngularJS, which means faster propagation of resolution or rejection into your models and avoiding unnecessary browser repaints, which would result in flickering UI. Q has many more features than $q, but that comes at a cost of bytes.
What is the best unit test framework for Angular?
5 Best Unit Testing Tools for Angular and ReactJS
- Karma. Karma is one of the most effective JavaScript command-line tools that can be used to spawn web servers.
- Jest.
- Mocha.
- Selenium Webdriver.
- Jasmine.
What is custom directive in AngularJS?
Custom directives are used in AngularJS to extend the functionality of HTML. Custom directives are defined using “directive” function. A custom directive simply replaces the element for which it is activated.
How can I use jQuery in Angular?
How To Install And Use jQuery In Angular
- Create an Angular project setup using the below commands or however you create your Angular app.
- Now, we must install jquery in our Angular app.
- In jQuery module, jquery.
- Now, we will write integartion on App.component.html.
- We need to declare to jQuery symbol in app.
What is scope in AngularJS directive?
Scope in a Directive Well, all of the directives have a scope associated with them. This scope object is used for accessing the variables and functions defined in the AngularJS controllers, and the controller and link functions of the directive.
What is the difference between Digest () and apply ()?
One difference between the two is how they are called. $digest() gets called without any arguments. $apply() takes a function that it will execute before doing any updates.
