add new rule and test
add new rules and test
add new rule and test
add new rule and test
add new rules and tests
fix test for Alpha attribute
change test
added engine
Merge pull request #419 from mimmi20/issue-416

Fixes #416
Merge pull request #420 from mimmi20/issue-417

Fixes #417
Merge pull request #421 from mimmi20/issue-418

Fixes #418
Merge pull request #422 from mimmi20/issue-414

Fixes #414
Merge pull request #423 from mimmi20/issue-415

Fixes #415
Merge pull request #407 from mimmi20/remove-duplicate-tests

Remove duplicate tests
update from master