Question

The test that fails when tested together with mvn test (or through the ide) is called EmpiricalTest.

If I test the file alone it goes through, but not otherwise. Why could that be?

You can checkout the Maven source code (to test) from here.

This is how I make sure the database is ‘blank’ before each test:

abstract public class PersistenceTest {

@Before
public void setUp() {
    db.destroy();
    assertIsEmpty(MUser.class);
    assertIsEmpty(Meaning.class);
    assertIsEmpty(Expression.class);
}

private <Entity> void assertIsEmpty(final Class<Entity> entityClass){
    final List<Entity> all = db.getAll(entityClass);
    Assert.assertTrue(all.isEmpty());
}

and the test that fails:

public class EmpiricalTest extends PersistenceTest {

Answer 1

It got to do with the id automatically assigned. The PU creates a SEQUENCE table, and although I empty the database from my entities, I don’t actually drop that table. So when I’m testing EmpiricalTest alone the sequence starts as expected from 1, while when testing together the test is executed later and starts with a higher, unexpected number.

This leads to this question.