import { expect } from 'chai';

import {
  getTimestamp, getFormattedTimestamp, getCtDbTimestamp, combineClDescriptions,
} from './ctfe_utils';

describe('ctfe_utils', () => {
  // This makes the tests deterministic w.r.t. the computer's timezone.
  const originalDateToLocaleString = Date.prototype.toLocaleString;
  before(() => { Date.prototype.toLocaleString = Date.prototype.toUTCString; });
  after(() => { Date.prototype.toLocaleString = originalDateToLocaleString; });

  // All dates are arbitrary.
  it('converts CT DB int date to JS Date', async () => {
    const date = getTimestamp(20200513095930);
    expect(date.getUTCFullYear()).to.equal(2020);
    // Month is 0 indexed in JS even though date(day) is not.
    expect(date.getUTCMonth()).to.equal(4);
    expect(date.getUTCDate()).to.equal(13);
    expect(date.getUTCHours()).to.equal(9);
    expect(date.getUTCMinutes()).to.equal(59);
    expect(date.getUTCSeconds()).to.equal(30);
  });

  it('converts CT DB int date to human readable string', async () => {
    const date_string = getFormattedTimestamp(20200513095930);
    expect(date_string).to.equal('Wed, 13 May 2020 09:59:30 GMT');
  });

  it('converts a JS Date to a CT DB int date', async () => {
    const date = new Date('December 31, 1975, 23:15:30 GMT+11:00');
    const db_date = getCtDbTimestamp(date);
    expect(db_date).to.equal('19751231121530');
  });

  it('combines CL descriptions', async () => {
    const result = combineClDescriptions(['foo', 'bar', '', '', 'baz']);
    expect(result).to.equal('Testing foo and bar and baz');
  });
});