add other unit test (issue #58)
add other unit test (issue #58)

This version introduces multiple enhancements:

added some complete test, test empty methods

Details of additions/deletions below:
--------------------------------------------------------------

Modified:   Test/CollectionTest.php
            -- Added --
                testReturnCollectionWithDataPreparation test data preparation when collection return some elements
                testElementCRUD
                testElementCRUDWithOriginalData
                testIndexRecalculation
                testAddDataWithOriginalDataCheck
            -- Updated --
                testArrayAccessToCollectionPages added some logic

chajr/class-kernel,chajr/class-kernel,bluetree-service/collection,bluetree-service/data,bluetree-service/container