import { $q } from './PromiseUtils';
import { expect } from 'chai';
import { Mock, IMock, It, Times } from 'typemoq';

describe('PromiseUtils', () => {
  describe('$q', () => {
    describe('when', () => {
      it('can resolve with a value', () =>
        expect($q.when('test')).to.eventually.deep.equal('test')
      );
    });

    describe('reject', () => {
      it('can reject a promise with a reason', () =>
        expect($q.reject('error')).to.be.rejectedWith('error')
      );

      it('can reject a promise without a reason', () =>
        expect($q.reject()).to.have.been.rejected
      );
    });

    describe('all', () => {
      it('can resolve multiple promises into one promise', () => {
        const promises = {
          a: Promise.resolve('test'),
          b: Promise.resolve(7)
        };

        return expect($q.all(promises)).to.eventually.deep.equal({ a: 'test', b: 7 });
      });

      it('can handle promise rejections', () => {
        const promises = {
          a: Promise.resolve('test'),
          b: Promise.reject('error')
        };

        return expect($q.all(promises)).to.be.rejectedWith('error');
      });
    });
  });
});