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final GregorianCalendar calendar = new GregorianCalendar();
final XMLGregorianCalendar dt;
try {
    dt = DatatypeFactory.newInstance().newXMLGregorianCalendar(calendar);
} catch (DatatypeConfigurationException e) {
throw new IllegalArgumentException(e);
} return dt;
Smile
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MoonMaker
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    Does this answer your question? [Try catch in a JUnit test](https://stackoverflow.com/questions/31423643/try-catch-in-a-junit-test) – Smile May 13 '20 at 09:13
  • Please provide additional explanation what you want to achieve (not only a piece of code). – SternK May 13 '20 at 09:35

1 Answers1

0

You can write a Junit4 libraries to test the IllegalArgumentException.class exception as below assuming your method signature is XMLGregorianCalendar getCalendar()

@Test(expected = IllegalArgumentException.class)
public void whenExceptionThrown_thenExpectationSatisfied() {
    getCalendar();
}

XMLGregorianCalendar getCalendar() {
        final GregorianCalendar calendar = new GregorianCalendar();
        final XMLGregorianCalendar dt;
        try {
            dt = DatatypeFactory.newInstance().newXMLGregorianCalendar(calendar);
        } catch (DatatypeConfigurationException e) {
            throw new IllegalArgumentException(e);
        }
        return dt;
    }

For Junit 5

@Test
void testGetCalendar() {
  Assertions.assertThrows(IllegalArgumentException.class, () -> {
    getCalendar();
  });

}
QuickSilver
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  • does expected work for Junit5? as it would be amazing to use 5. – MoonMaker May 13 '20 at 10:06
  • yes updated my ans with Junit5 test code @MoonMaker – QuickSilver May 13 '20 at 10:09
  • Read this doc (https://howtodoinjava.com/junit5/expected-exception-example/) and got the same answer , but is complaining about org.opentest4j.AssertionFailedError: Expected java.lang.IllegalArgumentException to be thrown, but nothing was thrown: – MoonMaker May 13 '20 at 10:26
  • @Test public void whenExceptionThrown_thenExpectationSatisfied() { Assertions.assertThrows(IllegalArgumentException.class, () -> { service.getDateAndTime(); }); } – MoonMaker May 13 '20 at 10:26
  • your test method is expect an error but getCalendar will never throw an error so you have got the exception – QuickSilver May 13 '20 at 10:40