ng2-pipes/src/app/pipes/math/pow.spec.ts

Useful angular2 pipes

import {PowerPipe} from "./pow";

describe('PowerPipe', () => {
  let pipe: PowerPipe;

  beforeEach(() => {
    pipe = new PowerPipe();
  });

  it('should return power of a given number', () => {
    expect(pipe.transform(3)).toEqual(9);
    expect(pipe.transform(3, 3)).toEqual(27);
    expect(pipe.transform(9)).toEqual(81);
    expect(pipe.transform(9, 4)).toEqual(6561);
  });
});