||A simple exception sub-class used throughout Dewdrop to make it easy to
distinguish exceptions thrown by Dewdrop itself from those thrown by other
||A mock adapter that uses a mock wpdb connection with no actual
connection to the database. Can be used when testing to ensure certain
methods are called when you expecte them to be without actually hitting
the MySQL database directly.
||A mock wpdb class that doesn't ever interact with the DB directly. It
simply lets you detect when certain methods are called during testing
to ensure application logic is functioning as expected.