@Test
public void exceptionTranslationWithTranslation() {
MapPersistenceExceptionTranslator mpet1 = new MapPersistenceExceptionTranslator();
RuntimeException in1 = new RuntimeException("in");
InvalidDataAccessApiUsageException out1 = new InvalidDataAccessApiUsageException("out");
InvalidDataAccessApiUsageException out2 = new InvalidDataAccessApiUsageException("out");
mpet1.addTranslation(in1, out1);
ChainedPersistenceExceptionTranslator chainedPet1 = new ChainedPersistenceExceptionTranslator();
assertSame("Should not translate yet", in1, DataAccessUtils.translateIfNecessary(in1, chainedPet1));
chainedPet1.addDelegate(mpet1);
assertSame("Should now translate", out1, DataAccessUtils.translateIfNecessary(in1, chainedPet1));
MapPersistenceExceptionTranslator mpet2 = new MapPersistenceExceptionTranslator();
mpet2.addTranslation(in1, out2);
chainedPet1.addDelegate(mpet2);
assertSame("Should still translate the same due to ordering",
out1, DataAccessUtils.translateIfNecessary(in1, chainedPet1));
ChainedPersistenceExceptionTranslator chainedPet2 = new ChainedPersistenceExceptionTranslator();
chainedPet2.addDelegate(mpet2);
chainedPet2.addDelegate(mpet1);
assertSame("Should translate differently due to ordering",
out2, DataAccessUtils.translateIfNecessary(in1, chainedPet2));
RuntimeException in2 = new RuntimeException("in2");
OptimisticLockingFailureException out3 = new OptimisticLockingFailureException("out2");
assertNull(chainedPet2.translateExceptionIfPossible(in2));
MapPersistenceExceptionTranslator mpet3 = new MapPersistenceExceptionTranslator();
mpet3.addTranslation(in2, out3);
chainedPet2.addDelegate(mpet3);
assertSame(out3, chainedPet2.translateExceptionIfPossible(in2));
}