This version of SchemeUnit is largely backwards compatible with version 2 but there are significant changes to the underlying model, justifying incrementing the major version number. These changes are best explained in The Philosophy of SchemeUnit.
There are a few omissions in this release, that will hopefully be corrected in later minor version releases:
There is no graphical UI, and in particular no integration with DrScheme.
The semantics of are not the desired ones. In particular, only checks and test cases have their evaluation delayed by a test suite; other expressions will be evaluated before the suite is constructed. This won’t affect tests written in the version 2 style. In particular this doesn’t effect test suites that contain other test suites; they continue to work in the expected way. However people incrementally developing tests from plain checks to test suites might be surprised. I’m hoping that few enough people will do this that no-one will notice before it’s fixed.