Other changes include:
- the tests now load the extension just built, instead of the one installed
- adds a gemspec file, that replaces the old Rakefile, to build the gem
- Rakefile is now used for running the tests, passing the name of the database to test against as a task argument
- when installing the gem a warning is printed if INFORMIXDIR is not set and exits, instead of trying to guess and failing miserably
You'll need to have the test-unit gem installed in order to run the tests.