Angular Unit Testing

Level : Advanced
Mentor: Shailendra Chauhan
Duration : 00:03:30

Unit Testing

Unit testing in Angular involves testing individual units of code, such as components, services, and pipes, in isolation to ensure they work as expected.


ng test

Integration Testing

Integration testing in Angular verifies the interactions between different units of an application, ensuring they work together correctly.


ng test --include="**/*.integration.spec.ts"

Tools and Technologies

Angular development often relies on tools and technologies like Angular CLI, TypeScript, RxJS, and Angular Material for building robust and scalable web applications.

Writing First Test Case

Writing the first test case in Angular is a crucial step in setting up a testing environment for your application.

Isolated Testing

Isolated testing in Angular involves testing components, services, or other units of code in isolation, using mock dependencies when necessary.


Pipes in Angular are used to transform data before displaying it in the template. Testing pipes ensures that data transformation is done correctly.


Angular services are responsible for providing shared functionality across an application. Testing services ensures they perform their tasks accurately.


Components are the building blocks of Angular applications. Testing components ensures that they render correctly and respond to user interactions as expected.

Integration Testing (Service)

Integration testing for services in Angular checks how they interact with other parts of the application and external dependencies.

Integration Testing (Component)

Integration testing for components in Angular ensures that they function correctly in conjunction with their templates and any child components.


An Angular Router is used for navigating between different views or components in an application. Testing routing ensures proper navigation behavior.

Component With Form

Testing components with forms in Angular involves verifying the functionality of forms, form controls, and their interaction with the component logic.

Directive Testing

Directives in Angular allow you to manipulate the DOM. Testing directives ensure they apply the desired behavior to the elements they are attached to.

Code Coverage

Code coverage tools help you determine which parts of your codebase are covered by tests. Angular projects can use tools like Istanbul to measure code coverage.


Debugging in Angular involves using tools like browser developer tools, Angular CLI's debugging features, and various debugging techniques to identify and fix issues in your application.
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