@Test
public void testEqualsContract() {
IBAN x = IBAN.parse(VALID_IBAN);
IBAN y = IBAN.parse(VALID_IBAN);
IBAN z = IBAN.parse(VALID_IBAN);
assertFalse("No object equals null", x.equals(null));
assertTrue("An object equals itself", x.equals(x));
assertTrue("Equality is symmetric", x.equals(y) && y.equals(x));
assertTrue("Equality is transitive", x.equals(y) && y.equals(z) && x.equals(z));
assertEquals("Equal objects have the same hash code", x.hashCode(), y.hashCode());
}
@Test
public void parseShouldRejectChecksumFailure() {
try {
IBAN.parse(INVALID_IBAN);
fail("Invalid input should have been rejected for checksum mismatch.");
} catch (WrongChecksumException e) {
assertThat(e.getFailedInput(), is(INVALID_IBAN));
}
}
@Test(expected = IllegalArgumentException.class)
public void parseShouldRejectTrailingWhitespace() {
IBAN.parse(VALID_IBAN + ' ');
}
@Test(expected = UnknownCountryCodeException.class)
public void parseShouldRejectUnknownCountryCode() {
IBAN.parse("UU345678345543234");
}
@Test(expected = IllegalArgumentException.class)
public void parseShouldRejectLeadingWhitespace() {
IBAN.parse(" " + VALID_IBAN);
}
@Test(expected = IllegalArgumentException.class)
public void parseShouldRejectInvalidInput() {
IBAN.parse("Shenanigans!");
}
@Test(expected = IllegalArgumentException.class)
public void parseShouldRejectNull() {
IBAN.parse(null);
}
@Test
public void getCheckDigitsShouldReturnTheCheckDigits() {
assertThat(IBAN.parse(VALID_IBAN).getCheckDigits(), is("91"));
}
@Test
public void getCountryCodeShouldReturnTheCountryCode() {
assertThat(IBAN.parse(VALID_IBAN).getCountryCode(), is("NL"));
}