Unit Testing from within Play-Module (JPA, eclipse PersistenceProvider) - testing

Question

My application is based on playframework and contains multiple modules.
The database interaction is handled trough JPA (<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>)
My task is to cover one of these modules with unit-tests.
Unfortunately running the "play test" command with unit tests provied on module-level results in the following Exception:
javax.persistence.PersistenceException: No Persistence provider for EntityManager named defaultPersistenceUnit
Persistence-Provider is defined globaly (outside of the Module) in conf/META-INF/persistence.xml
copying the global persistence.xml to the module doesn't fix the issue.
Placing the tests outside of the module (in global test directory) and execute them works flawless presuming that there are no other tests within modules.
Can someone explain me why the Error comes up? Is there any way to have working JPA-capable tests on module level?
Thanks in advance
Urs

Answer 1

I had the same problem running JUnit tests from my play application in Eclipse.
To solve this issue you need to make the folder conf available to the all project.
Project Properties-> Java Build Path ->Source
Add Folder and choose the conf folder.

Answer 2

I checked your code. I think don't need another persistence.xml. Can you try these solutions in play module:
#Test()
public void empty() {
running(fakeApplication(), new Runnable() {
public void run() {
JPA.withTransaction(new play.libs.F.Callback0() {
public void invoke() {
Object o = new Object(someAttrib);
o.save();
assertThat(o).isNotNull();
}
});
}
});
}
Or:
#Before
public void setUpIntegrationTest() {
FakeApplication app = fakeApplication();
start(app);
em = app.getWrappedApplication().plugin(JPAPlugin.class).get().em("default");
JPA.bindForCurrentThread(em);
}
These codes are from this page. I don't test it!
Please modify your code to:
#BeforeClass
public static void setUp() {
FakeApplication app = fakeApplication(inMemoryDatabase());
start(app);
em = app.getWrappedApplication().plugin(JPAPlugin.class).get().em("default");
JPA.bindForCurrentThread(em);
}
Please try it!