All the test cases are written using Microsoft unit test framework included in VS2008. The test cases are migrated from POI 3.x. Since there are a lot of test cases included in POI 3.x source code, it's not necessary for me to write
test cases to test the POI classes.
If almost 50% test cases are passed, alpha version is released.
If more than 80% test cases are passed, beta version is released.
If more than 95% test cases are passed, stable version is released.
To make sure the version is really stable, a release candidate (RC) may be released before the stable version is released.