import { addition, subtraction } from '../utils';

test('utils', () => {
  expect(typeof addition).toBe('function');
  expect(typeof subtraction).toBe('function');
});

test('utils addition', () => {
  expect(addition(1, 1)).toBe(2);
  expect(addition(1, -1)).toBe(0);
});

test('utils subtraction', () => {
  expect(subtraction(1, 1)).toBe(0);
  expect(subtraction(10, 1)).toBe(9);
});