1..9
# ::get() ::set()
ok 1 - ::get() returns the value of key config
ok 2 - ::get() takes a default value as its second argument
# ::has()
ok 3 - ::has() returns false if the key config does not exist
ok 4 - ::has() returns true if the key config exists
# ::add()
ok 5 - ::add() adds an array of config parameters
ok 6 - ::add() adds an array of config parameters
ok 7 - ::add() adds an array of config parameters
# ::getAll()
ok 8 - ::getAll() returns all config parameters
# ::clear()
ok 9 - ::clear() removes all config parameters
# Looks like everything went fine.