it('0, 210 bemenetre 0', () => {    
    assert.throws(() => {
      calcWeight(0, 210)
    }, Error);
  })

  it('0, 210 bemenetre 0', () => {    
    let error;
    try {
      calcWeight(0, 210)
    } catch (err) {
      error = err;
    }
    assert.ok(error);
    assert.equal(error.message, 'Érvénytelen paraméter');