@Test
public void positiveVeryLong() {

    BigIntegerConverter converter = new BigIntegerConverter();
    BigInteger bigInteger = converter.convertToObject("1234567890987654321234567890987654321234567890987654321",
            Locale.GERMAN);
    assertEquals("1234567890987654321234567890987654321234567890987654321", bigInteger.toString());
}