add unit tests (issue #7)
add unit tests (issue #7)

This version introduces multiple enhancements:

added new part of tests and modified validation test

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

Modified:   Test/ObjectTest.php
            -- Added --
                testAccessToDataByAttributes check access and setup data by object attributes
                testDisplayObjectAsString check echoing of object with separator changing
            -- Updated --
                testDataValidation moved at top of test and added checking validation by closures
                testAccessToDataAsArray added test for object single element

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