def test_add_remove_counter(self):
"""Tests adding and removing a counter from a collection"""
insmgr = CounterCollection('test_namespace', description=u'test')
ctr = NumericValueCounter('a_counter')
atr = NumericValueCounter('b_counter')
insmgr.add(ctr)
insmgr.add(atr)
self.assertRaises(ObjectExists, insmgr.add, ctr)
self.assertEquals(insmgr.description, u'test')
insmgr.remove(ctr)
self.assertRaises(ObjectNotExists, insmgr.remove, ctr)
c_atr = insmgr.get('b_counter')
self.assertEquals(c_atr, atr)
self.assertRaises(ObjectNotExists, insmgr.get, 'c_counter')
self.assertEquals(insmgr.get()[0], atr)
self.assertEquals(len(insmgr.get()), 1)
