promise-kata-socratesat.js

// 75: Promise - basics 
// To do: make all tests pass, leave the assert lines unchanged!

function succeedingApiCall() {
  return Promise.resolve('200');
}

function failingApiCall() {
  return Promise.reject('500');
}

function succeedingGpsFetch() {
  return Promise.resolve('Gps');
}

function failingGpsFetch() {
  return Promise.reject('Gps Error');
}

function clockInWithoutGps(apiCall) {
  return apiCall();
}

function clockInWithGps(fetchGps, apiCall) {
  return fetchGps()
    .then((gps) => {
      return [apiCall(), Promise.resolve(gps)];
    })
    .then((results) => Promise.all(results))
    .then((results) => results.join('+'));
}

describe('clock in without gps', () => {
  it('sends a timestamp, and server acknolages', () => {
    return clockInWithoutGps(succeedingApiCall)
      .then((response) => assert.equal(response, '200'))
  });
  
  it('sends a timestap, and server doesn\'t respond', (done) => {
    clockInWithoutGps(failingApiCall)
      .then(() => assert(false))
      .catch((response) => assert.equal(response, '500'))
      .then(done);
  });
});

describe('clock in with gps', () => {
  it('doesn\'t send the timestamp if gps fails', () => {
    let wasCalled = false;
    function apiCall() { assert(false) }
    
    return clockInWithGps(failingGpsFetch, apiCall)
      .then(() => assert(false))
      .catch((response) => {
        assert.equal(wasCalled, false);
        assert.equal(response, 'Gps Error');
      });
  });
  
  it('sends timestamp and gps, and server acknowledges', () => {
    return clockInWithGps(succeedingGpsFetch, succeedingApiCall)
      .then((response) => assert.equal(response, '200+Gps'))
  });
});