# GM Java <-> Erlang Tests The core Java libraries are all written as transform functions over data. There is little point, therefore, in obsessing over "unit tests" and "regression testing" of Java code in Java when we have cannonical code in Erlang. The purpose of this utility is to instead test the Java libraries agains the Erlang libraries directly. ## How to run In the current directory simply run `zx runlocal` and reports will be placed in the `reports/` directory. To run a specific test suite run `zx runlocal [module names]`. To list module names, run `zx runlocal list`.