[JUnit] Consider adding unit tests for API

[Ali-RS]

Please add a unit test for testing the functionality provided by API and the expected exceptions for example when manipulating a buffer after release.

[pavly-gerges]

Hi @Ali-RS, I am willing to introduce jme-alloc to the upcoming JME release as a replacement for the lwjgl-2 and the current Android allocators, Would this issue help us to better profile jme-alloc?