import {describe, it, assert} from 'vitest';
import {PlainDateTime} from '@/plain-date-time.js';

type PlainDateTimeToStringParameters = Parameters<typeof PlainDateTime.prototype.toString>[0];

const smallestUnitDateTime = new PlainDateTime(2000, 5, 2, 12, 34, 56, 123);

let testCases: [PlainDateTime, PlainDateTimeToStringParameters, string][] = [
  [new PlainDateTime(1976, 11, 18, 15, 23, 30, 123), undefined, '1976-11-18T15:23:30.123'],
  [new PlainDateTime(1976, 11, 18, 15, 23, 30, 123), {fractionalSecondDigits: 0}, '1976-11-18T15:23:30'],
  [
    new PlainDateTime(1999, 12, 31, 23, 59, 59, 999),
    {roundingMode: 'ceil', fractionalSecondDigits: 3},
    '2000-01-01T00:00:00.000',
  ],
  [
    new PlainDateTime(1999, 12, 31, 23, 59, 59, 999),
    {roundingMode: 'halfExpand', fractionalSecondDigits: 3},
    '2000-01-01T00:00:00.000',
  ],
  [smallestUnitDateTime, {smallestUnit: 'minute'}, '2000-05-02T12:34'],
  [smallestUnitDateTime, {smallestUnit: 'second'}, '2000-05-02T12:34:56'],
  [smallestUnitDateTime, {smallestUnit: 'millisecond'}, '2000-05-02T12:34:56.123'],
];

describe('PlainDateTime#toString', () => {
  it.each(testCases)('%j.toString(%j) === %j', (date, options, expected) => {
    assert.equal(date.toString(options), expected);
  });
});