The repository says that there is a test suite that I should be able to run with ant test, but this doesn't work. How do I run the test suite?

Initial investigation:

In a recent change, the ant task in build.xml for running the tests was renamed to ant-test to distinguish it from gradle tasks. gradle test isn't setup to run this task yet. When I try to run ant ant-test, I get an error, saying that modbuild.xml doesn't have ant-test. The generated modbuild.xml has a test task, so it's likely just a matter of running the correct modbuild.xml task from build.xml.