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import { describe, expect, it } from 'vitest';
import { arabicToRoman } from './roman-numeral-converter.service';
describe('roman-numeral-converter', () => {
describe('arabicToRoman', () => {
it('should convert numbers lower than 1 to empty string', () => {
expect(arabicToRoman(-100)).toEqual('');
expect(arabicToRoman(-42)).toEqual('');
expect(arabicToRoman(-26)).toEqual('');
expect(arabicToRoman(-10)).toEqual('');
expect(arabicToRoman(0)).toEqual('');
expect(arabicToRoman(0.5)).toEqual('');
expect(arabicToRoman(0.9)).toEqual('');
});
it('should convert numbers greater than 3999 to empty string', () => {
expect(arabicToRoman(3999.1)).toEqual('');
expect(arabicToRoman(4000)).toEqual('');
expect(arabicToRoman(10000)).toEqual('');
});
it('should convert floating points number to the lower integer in roman version', () => {
expect(arabicToRoman(1.1)).toEqual('I');
expect(arabicToRoman(1.9)).toEqual('I');
expect(arabicToRoman(17.6)).toEqual('XVII');
expect(arabicToRoman(29.999)).toEqual('XXIX');
});
it('should convert positive integers to roman numbers', () => {
expect(arabicToRoman(1)).toEqual('I');
expect(arabicToRoman(2)).toEqual('II');
expect(arabicToRoman(3)).toEqual('III');
expect(arabicToRoman(4)).toEqual('IV');
expect(arabicToRoman(5)).toEqual('V');
expect(arabicToRoman(6)).toEqual('VI');
expect(arabicToRoman(7)).toEqual('VII');
expect(arabicToRoman(8)).toEqual('VIII');
expect(arabicToRoman(9)).toEqual('IX');
expect(arabicToRoman(10)).toEqual('X');
expect(arabicToRoman(11)).toEqual('XI');
expect(arabicToRoman(12)).toEqual('XII');
expect(arabicToRoman(13)).toEqual('XIII');
expect(arabicToRoman(14)).toEqual('XIV');
expect(arabicToRoman(15)).toEqual('XV');
expect(arabicToRoman(16)).toEqual('XVI');
expect(arabicToRoman(17)).toEqual('XVII');
expect(arabicToRoman(18)).toEqual('XVIII');
expect(arabicToRoman(19)).toEqual('XIX');
expect(arabicToRoman(20)).toEqual('XX');
expect(arabicToRoman(21)).toEqual('XXI');
expect(arabicToRoman(24)).toEqual('XXIV');
expect(arabicToRoman(28)).toEqual('XXVIII');
expect(arabicToRoman(29)).toEqual('XXIX');
expect(arabicToRoman(30)).toEqual('XXX');
expect(arabicToRoman(40)).toEqual('XL');
expect(arabicToRoman(50)).toEqual('L');
expect(arabicToRoman(60)).toEqual('LX');
expect(arabicToRoman(70)).toEqual('LXX');
expect(arabicToRoman(80)).toEqual('LXXX');
expect(arabicToRoman(90)).toEqual('XC');
expect(arabicToRoman(100)).toEqual('C');
expect(arabicToRoman(200)).toEqual('CC');
expect(arabicToRoman(300)).toEqual('CCC');
expect(arabicToRoman(400)).toEqual('CD');
expect(arabicToRoman(500)).toEqual('D');
expect(arabicToRoman(600)).toEqual('DC');
expect(arabicToRoman(700)).toEqual('DCC');
expect(arabicToRoman(800)).toEqual('DCCC');
expect(arabicToRoman(900)).toEqual('CM');
expect(arabicToRoman(999)).toEqual('CMXCIX');
expect(arabicToRoman(1000)).toEqual('M');
expect(arabicToRoman(2000)).toEqual('MM');
});
});
});
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