'Test get_worksheet_by_name()'

def test_get_worksheet_by_name05(self):

    fh = StringIO()
    workbook = Workbook()
    workbook._set_filehandle(fh)
    exp = None
    got = workbook.get_worksheet_by_name('Sheet    5')
    workbook.fileclosed = 1
    self.assertEqual(got, exp)
