date.util.spec.ts

import { registerLocaleData } from '@angular/common';
import localeDe from '@angular/common/locales/de';
import { format } from 'date-fns';
import { de } from 'date-fns/locale';
import { formatForDatabase, formatFullDate, formatFullDateWithTimeAndDay, formatFullDateWithTimeWithoutSeconds, formatToPrettyDate, formatWithoutYear } from './date.util';

registerLocaleData(localeDe);

describe('Date Util', () => {

	const dateToFormat: Date = new Date('1010-01-01:01:01:01');

	describe('formatForDatabase()', () => {
		it('should return correct date string with Date object', () => {
			const formattedDate: string = formatForDatabase(dateToFormat);

			expect(formattedDate).toEqual('1010-01-01');
		})
	})

	it('should return full date with hour and minutes', () => {
		const formattedDate: string = formatFullDateWithTimeWithoutSeconds(dateToFormat);

		expect(formattedDate).toEqual('01.01.10 01:01');
	})

	it('should return name of day, full date, hour, minute and seconds', () => {
		const formattedDate: string = formatFullDateWithTimeAndDay(dateToFormat);

		expect(formattedDate).toEqual('Montag, 01.01.1010, 01:01:01');
	})

	it('should return full date', () => {
		const formattedDate: string = formatFullDate(dateToFormat);

		expect(formattedDate).toEqual('01.01.1010');
	})

	it('should return day and name of month', () => {
		const formattedDate: string = formatWithoutYear(dateToFormat);

		expect(formattedDate).toEqual('01. Jan.');
	})

	describe('formatToPrettyDate()', () => {
		it('should format date without year', () => {
			const today: Date = new Date();
			const day: string = format(today, 'dd');
			const month: string = format(today, 'MMMM',  {locale: de});

			const result: string = formatToPrettyDate(today);

			expect(result).toEqual(`${day}. ${month}`);
		})

		it('should format date without year', () => {
			const result: string = formatToPrettyDate(dateToFormat);

			expect(result).toEqual('01.01.1010');
		})
	})

})