it('should print empty string if no string given', () => { print(); print(''); expect(output.write).to.have.callCount(2); expect(output.write).to.have.been.calledWithMatch(''); expect(output.write).to.have.been.calledWithMatch(''); });
it('should return a `thenAddNewLine` helper', () => { expect(print().thenAddNewLine).to.not.be.undefined; });