You can create a TPTP JUnit test in one of two ways: manually or from an existing JUnit test case.
TPTP JUnit Tests can be created manually or as a result of importing existing JUnit tests outside TPTP into a TPTP JUnit Test. They should be created manually if they are to exploit the TPTP JUnit Test behavior feature.
If you have JUnit tests outside of TPTP, these can be imported into a TPTP JUnit test.