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Learning Angular

You're reading from   Learning Angular A no-nonsense beginner's guide to building web applications with Angular 10 and TypeScript

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Product type Paperback
Published in Sep 2020
Publisher Packt
ISBN-13 9781839210662
Length 430 pages
Edition 3rd Edition
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Authors (2):
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Aristeidis Bampakos Aristeidis Bampakos
Author Profile Icon Aristeidis Bampakos
Aristeidis Bampakos
Pablo Deeleman Pablo Deeleman
Author Profile Icon Pablo Deeleman
Pablo Deeleman
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Toc

Table of Contents (19) Chapters Close

Preface 1. Section 1: Getting Started with Angular
2. Chapter 1: Building Your First Angular App FREE CHAPTER 3. Chapter 2: Introduction to TypeScript 4. Section 2: Components – the Basic Building Blocks of an Angular App
5. Chapter 3: Component Interaction and Inter-Communication 6. Chapter 4: Enhance Components with Pipes and Directives 7. Chapter 5: Structure an Angular App 8. Chapter 6: Enrich Components with Asynchronous Data Services 9. Section 3: User Experience and Testability
10. Chapter 7: Navigate through Components with Routing 11. Chapter 8: Orchestrating Validation Experiences in Forms 12. Chapter 9: Introduction to Angular Material 13. Chapter 10: Giving Motion to Components with Animations 14. Chapter 11: Unit test an Angular App 15. Section 4: Deployment and Practice
16. Chapter 12: Bringing an Angular App to Production 17. Chapter 13: Develop a Real-World Angular App 18. Other Books You May Enjoy

Testing components

You may have noticed that every time we used the Angular CLI to scaffold a new Angular app or generate an Angular artifact, it would also create some test files for us.

Test files in the Angular CLI contain the word spec in their filename so that it is easier for the Karma runner to find and run them. Mainly, the filename of a test is the same as the Angular artifact that is testing followed by the suffix .spec.ts. For example, the test file for the main component of an Angular app, app.component.ts, would be app.component.spec.ts and would reside in the same path as the component file.

Important Note

We should think about an Angular artifact and its corresponding test as one thing. When we change the logic of the artifact, we need to modify the unit test as well. Placing unit test files together with their Angular artifacts makes it easier for us to remember and edit both of them. It also helps us when we need to do some refactoring to our code, such as...

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