What is karma config js file in angular?

Karma is the foundation of our testing workflow. It brings together our other testing tools to define the framework we want to use, the environment to test under, the specific actions we want to perform, etc. In order to do this Karma relies on a configuration file named by default karma. conf. js.

What is karma configuration file in angular?

Karma is a task runner for our tests. It uses a configuration file in order to set the startup file, the reporters, the testing framework, the browser among other things. The rest of the dependencies are mainly reporters for our tests, tools to use karma and jasmine and browser launchers.

What is karma config js file?

The Karma configuration file can be written in JavaScript or CoffeeScript and is loaded as a regular Node. js module. Within the configuration file, the configuration code is put together by setting module. exports to point to a function which accepts one argument: the configuration object. // an example karma.

What is karma Conf JS in angular?

The karma. conf. js file is a partial Karma configuration file. The CLI constructs the full runtime configuration in memory, based on application structure specified in the angular.

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How do I create a karma configuration file?

Generating the config file. The configuration file can be generated using karma init : $ karma init my. conf.

What is TestBed angular?

The TestBed is the first and largest of the Angular testing utilities. It creates an Angular testing module — a @NgModule class — that you configure with the configureTestingModule method to produce the module environment for the class you want to test.

What is the difference between karma and Jasmine?

Jasmine can be classified as a tool in the “Javascript Testing Framework” category, while Karma is grouped under “Browser Testing”. “Can also be used for tdd ” is the primary reason why developers consider Jasmine over the competitors, whereas “Test Runner” was stated as the key factor in picking Karma.

How do I run Karma config?

js configuration file. For example, to run or debug tests in Headless Chrome, type –browsers ChromeHeadless in the Karma options field. See Automated testing with Headless Chrome for details. To see all the available CLI options, type karma start –help in the Terminal Alt+F12 .

How do I change karma version?

In changing the version manually in package. json you will tell npm to install that version (or higher) but it won’t actually be installed until you run the npm install/update. If you want to install a different package or version from what’s declared in your package.

How do I know if I have karma installed?

To verify whether the installation was successful, just run “karma –version” and you should see the current version number.

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How do I install karma?

Open the Terminal and start the karma.conf.js generation wizard by typing one of the following depending on your operating system:

  1. For macOS and Linux: ./node_modules/karma/bin/karma init.
  2. For Windows: npm install -g karma-cli. karma init.

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What is protractor in angular?

Protractor is an end-to-end testing framework for AngularJS applications and works as a solution integrator – combining powerful tools and technologies such as NodeJS, Selenium, webDriver, Jasmine, Cucumber and Mocha. It has a bunch of customizations from Selenium to easily create tests for AngularJS applications.

What is karma test runner?

Karma is a test runner for JavaScript that runs on Node. js. … Using Karma to run tests using one of many popular JavaScript testing suites (Jasmine, Mocha, QUnit, etc.) and have those tests executed not only in the browsers of your choice, but also on the platform of your choice (desktop, phone, tablet.)

What is karma preprocessor?

Preprocessors in Karma allow you to do some work with your files before they get served to the browser. These are configured in the preprocessors block of the configuration file: preprocessors: { ‘**/*.

Why is karma so slow?

The problem is that Chrome starves any minimised or secondary tabs (switched tabs) of CPU cycles. Therefore, if you minimise the browser instance running the karma server, or just switch to a different tab, then the karma server is severely starved of CPU and the tests take a long time to complete.

How do I run a single spec file on Karma?

Running a Karma Test Case for a Single Spec File / Single module

  1. Add the Spec name in the test. ts file under the src folder. ​x. import ‘zone.js/dist/zone-testing’; import { getTestBed } from ‘@angular/core/testing’ …
  2. Run ng test –code-coverage. Now Karma and Jasmine will check only Test-Demo. Spec. ts.
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