Updated comments
Added ScriptRegistered constraint
Updated MetaboxExists constraint class name
Added assertScriptExists()
Implemented wp_enqueue_scripts
Added unit test
Modified admin_enqueue_scripts
Implemented wp_register_script for this so as to decouple from model
Implemented unit tests
Added wp_enqueue_scripts hook
Implemented unit test
Added test_Actions
This test asserts that appropriate actions and filters are hooked
Fixed incorrect parameter passing
Code cleanup
Added error messages to tests
Removed unnecessary parameters for  get_scripts()
Removed unnecessary parameters for  get_admin_scripts()
Removed unused parameters
Added missing open bracket
Added action hooks
admin_enqueue_scripts
add_meta_boxes 
Added tests
testActionExistsAddMetaBoxes
testActionExistsAdminEnqueueScripts
Added assertion
Ensure _txtdomain property is properly set by __construct()
Rename testConstructor()
Removed actions called by Base_Model
Fixed type in comments