@Test
public void testToPlain() throws Exception {
assertEquals("", IBAN.toPlain(""));
assertEquals("12", IBAN.toPlain("12"));
assertEquals("12", IBAN.toPlain("1 2"));
assertEquals("1234", IBAN.toPlain("1234"));
assertEquals("1234", IBAN.toPlain("1 2 3 4"));
assertEquals("12345", IBAN.toPlain("12345"));
assertEquals("12345", IBAN.toPlain("1234 5"));
assertEquals("12345678", IBAN.toPlain("12345678"));
assertEquals("12345678", IBAN.toPlain("1234 5678"));
assertEquals("123456789", IBAN.toPlain("123456789"));
assertEquals("123456789", IBAN.toPlain("1234 5678 9"));
}
