Looking to calculate the code coverage of my Angular 2 code. Wondering if there are any plugins available for VS Code or WebStorm that can assist with this. My unit testing is done using Jasmine and Karma.
Looking to calculate the code coverage of my Angular 2 code. Wondering if there are any plugins available for VS Code or WebStorm that can assist with this. My unit testing is done using Jasmine and Karma.
To view comprehensive test coverage statistics in Angular CLI, simply enter the following command at the bottom of your command prompt window:
ng test --code-coverage
Result:
https://i.stack.imgur.com/2wo3O.png
If you wish to see the individual test coverage of components, follow these steps:
npm install --save-dev karma-teamcity-reporterAdd
require('karma-teamcity-reporter')ng test --code-coverage --reporters=teamcity,coverage-istanbulNote that the list of reporters is comma-separated, with the addition of a new reporter, teamcity.
After running this command, navigate to the coverage folder in your directory and open index.html for a graphical representation of test coverage.
https://i.stack.imgur.com/luaq2.png
In addition, you can specify the desired coverage threshold in karma.conf.js as follows:
coverageIstanbulReporter: {
reports: ['html', 'lcovonly'],
fixWebpackSourcePaths:true,
thresholds:{
statements:90,
lines:90,
branches:90,
functions: 90
}
},
To begin, start by installing the necessary dependencies.
npm install karma karma-jasmine karma-chrome-launcher karma-jasmine-html-reporter karma-coverage-istanbul-reporter
Next, execute the ng test command.
ng test --code-coverage
Afterwards, run the server to view your coverage report.
http-server -c-1 -o -p 9875 ./coverage
You'll see a display similar to this:
https://i.stack.imgur.com/FfNdx.png
If you're interested, I've written a blog post on this topic here.
This one had me stumped for a while. After some trial and error, I finally found the solution:
ng test --code-coverage
Just double-check that your karma.conf.js file includes a specified reporter (I personally prefer 'coverage-istanbul')
For example: reporters: ['coverage-istanbul']
You'll find the coverage report in a folder named 'coverage' at the root of your directory.
Running ng test with code coverage enabled:
Alternatively, you can run ng test with additional reporters for TeamCity and Istanbul coverage:
ng test --code-coverage --reporters=teamcity,coverage-istanbul
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