Add tests to CommonTools.
Add tests to CommonTools.


Former-commit-id: 783bb27fd3631b378a23cc37391686af6811deeb
kmuzalewska/j-pet-framework,kmuzalewska/j-pet-framework,kmuzalewska/j-pet-framework,kmuzalewska/j-pet-framework,kmuzalewska/j-pet-framework