How can I bind a DataSource to an InitialContext for JUnit testing? [duplicate]

Answer 1

I found that example to be wrong as well. This worked for me.

ic.createSubcontext("java:comp");
ic.createSubcontext("java:comp/env");
ic.createSubcontext("java:comp/env/jdbc");

final PGSimpleDataSource ds = new PGSimpleDataSource();
ds.setUrl("jdbc:postgresql://localhost:5432/mydb");
ds.setUser("postgres");
ds.setPassword("pg");

ic.bind("java:comp/env/jdbc/mydb", ds);

The difference you'll note is that the '/' after 'java:' in each of the contexts is wrong and shouldn't be there.

Answer 2

When I last tried something like this a few years ago, I finally gave up and refactored: at that point, you could NOT create a DataSource outside of a container. Maybe you can, now, maybe someone's mocked something up.

Still, that smells... You shouldn't have ANY "business logic" code directly dependent on DataSources or JNDI lookups or such. That's all plumbing to be wired together outside your code.

How flexible is your design? If your code under test is directly dependent on a DataSource (or even obtains its own Connection), refactor it. Injecting a Connection will let you can test all you like with plain old JDBC, even using an in-memory implementation, and save you from having to prop up a lot of unnecessary (for the test, anyway) infrastructure to do it.