Example
Given a pipe that reverse a string
import { Pipe, PipeTransform } from '@angular/core';
@Pipe({ name: 'reverse' })
export class ReversePipe implements PipeTransform {
transform(value: string): string {
return value.split('').reverse().join('');
}
}
It can be tested configuring the spec file like this
import { TestBed, inject } from '@angular/core/testing';
import { ReversePipe } from './reverse.pipe';
describe('ReversePipe', () => {
beforeEach(() => {
TestBed.configureTestingModule({
providers: [ReversePipe],
});
});
it('should be created', inject([ReversePipe], (reversePipe: ReversePipe) => {
expect(reversePipe).toBeTruthy();
}));
it('should reverse a string', inject([ReversePipe], (reversePipe: ReversePipe) => {
expect(reversePipe.transform('abc')).toEqual('cba');
}));
});
