text: import {toNumber, invertNumber} from '../../../src/helper/number';
  
  describe('.toNumber()', () => {
    it('should correctly convert passed value into number', () => {
      expect(toNumber(-100)).toBe(-100);
      expect(toNumber(-1)).toBe(-1);
      expect(toNumber(19)).toBe(19);
      expect(toNumber(19.9)).toBe(19.9);
      expect(toNumber(0.9)).toBe(0.9);
      expect(toNumber('0.9')).toBe(0.9);
      expect(toNumber('0')).toBe(0);
      expect(toNumber('-10')).toBe(-10);
      expect(toNumber(' -10 ')).toBe(-10);
      expect(isNaN(toNumber('foo'))).toBe(true);
    });
  });
  
  describe('.invertNumber()', () => {
    it('should correctly invert number', () => {
      expect(invertNumber(-100)).toBe(100);
      expect(invertNumber(-1)).toBe(1);
      expect(invertNumber(19)).toBe(-19);
      expect(invertNumber(19.9)).toBe(-19.9);
      expect(invertNumber(0.9)).toBe(-0.9);
      expect(invertNumber('0.9')).toBe(-0.9);
      expect(invertNumber('0')).toBe(0);
      expect(invertNumber('-10')).toBe(10);
      expect(invertNumber(' -10 ')).toBe(10);
      expect(isNaN(invertNumber('foo'))).toBe(true);
    });
  });
  