@Test
public void negativeVeryLong() {

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