README.md

Angular Unit Testing Project

This project was generated with Angular CLI. It's purpose is to demonstrate different ways of testing classes, services and components in Angular. The project itself is just a plain CLI-project. It doesn't do much, except for showing some components that you write tests for in the workshops.

This project belongs to the course Angular Fundamentals / Advanced by Peter Kassenaar.

Running unit tests

Run ng test to execute the unit tests via Karma.

Open the various *.spec.ts-files and (un)comment the specific, provided tests to see them in action.

Suggested order

1. See src/app/shared/model/00-person.model.ts|spec.ts for testing of a simple class.
2. See src/app/shared/services/*.service.ts|spec.ts for testing of a services, async behavior and mocking async services.
3. See src/app/city/city.component.ts|*.spec.ts for testing of a simple component using fixtures and debugElement.
4. See src/app/input/input.component.ts|*.spec.ts for testing of a component using @Input().
5. See src/app/output/output.component.ts|*.spec.ts for testing of a component using @Output().
6. See src/app/card/card.component.ts|*.spec for testing strategies with mocking of nested components

Workshops

• Study 10-car.model.ts and create a test suite for it.
• Study 10-car.service.ts and create a test suite for it, using TestBed.configureTestingModule()
• Study 11-car.remote.service.ts and create a test suite for it, using MockBackend and MockResponse.
• The *.spec.ts-files are already available, but write the tests yourself.

You can run the project with ng serve or npm start to see its simple output

• Study car.component.ts and create a test suite for it.
• Test wether the component is correctly created.
• Test if this.cars[] is constructed after initialisation. Expect the length of the array to be 2.
• Test wether the @Output() event is called when clicking on a car.
• Create an @Input property for the component yourself and test it.

Extra links (Cypress)

• End to End (e2e) – Angular Testing – Protractor vs Cypress: https://techblog.fexcofts.com/2018/09/24/end-to-end-e2e-angular-testing-protractor-vs-cypress/
• Unit testing Angular components with Cypress - https://medium.com/joolsoftware/unittesting-angular-components-with-cypress-202a38d9f81a
• Useful Online book on Angular Testing: Testing Angular, https://testing-angular.com/introduction/#introduction