Fail the test if an exception is caught.
@Test
public void testGetBalanceForPerson() {
// creating mock person
Person person1 = mock(Person.class);
when(person1.getId()).thenReturn("mockedId");
// calling method under test
try {
myClass.getBalanceForPerson(person1);
} catch(Exception e) {
fail("Should not have thrown any exception");
}
}