it('Should consider the field valid (tag with non-ASCII characters), characters: false', () => {
        const field = {'tag': 'ÄÄÄ', 'ind1': ' ', 'ind2': ' ', 'subfields': [{'code': 'c', 'value': '20150121'}]};
        // eslint-disable-next-line no-unused-expressions
        expect(Utils.validateField(field, {characters: false})).not.to.throw;
      });