[FEATURE] Test case for grid definition retrieval
[FEATURE] Test case for Providers
[BUGFIX] Incorrect extension name in test case class names
[TASK] Add test cases for Provider to return template path set
[TASK] Add more test cases to Provider test suite
[TASK] Remove superfluous require_once statement in test case
[TASK] Add FlexForm XML testing fixture container
[FEATURE] Test suite for hook subscriber executions
[TASK] Remove two unused functions discovered by code coverage check
[TASK] Add a very basic Default.html fallback Layout
[TASK] Add a few fixtures to template test fixture collection
[FEATURE] View test suite
[TASK] Improve hook subscriber test suite