UT Params and Query Params in Angular 15

Angular 15 introduces new features for working with unit testing (UT) params and query params. These features add more granularity and control to unit testing in Angular applications.

UT Params

UT params refer to the parameters that are passed to a unit test in Angular. These parameters can be used to configure and customize the behavior of the test, allowing for more targeted and specific testing scenarios.

Example


describe('MyComponent', () => {
it('should do something based on the UT param', () => {
const fixture = TestBed.createComponent(MyComponent);
const component = fixture.componentInstance;
const utParam = 'someValue';

component.doSomething(utParam);

expect(component.something).toBe('someExpectedResult');
});
});


Query Params

Query params, on the other hand, refer to the parameters that are sent as part of a URL query string. In Angular, these query params can be accessed and manipulated within the application using the ActivatedRoute service. This allows for dynamic navigation and content rendering based on the query params.

Example


import { ActivatedRoute } from '@angular/router';

// ...

constructor(private route: ActivatedRoute) {
this.route.queryParams.subscribe(params => {
console.log(params['param1']);
console.log(params['param2']);
});
}


Angular Unit Testing

When it comes to unit testing in Angular, the ability to work with UT and query params provides developers with powerful tools for writing comprehensive and effective tests. By leveraging these features, developers can ensure that their components and services are thoroughly tested under a variety of conditions and scenarios.

Overall, UT params and query params are valuable additions to the Angular framework, enhancing the capabilities and flexibility of unit testing in Angular applications.