Changed the inheritance model to remove types

The inheritance model has changed, we no longer need to store an array of
`types` with the model we can just use the classname in `_cls`.

See the upgrade docs for information on how to upgrade
MongoEngine/mongoengine#148

tests/document/class_methods.py

@@ -0,0 +1,183 @@
+# -*- coding: utf-8 -*-
+from __future__ import with_statement
+import unittest
+
+from mongoengine import *
+
+from mongoengine.queryset import NULLIFY
+from mongoengine.connection import get_db
+
+__all__ = ("ClassMethodsTest", )
+
+
+class ClassMethodsTest(unittest.TestCase):
+
+    def setUp(self):
+        connect(db='mongoenginetest')
+        self.db = get_db()
+
+        class Person(Document):
+            name = StringField()
+            age = IntField()
+
+            non_field = True
+
+            meta = {"allow_inheritance": True}
+
+        self.Person = Person
+
+    def tearDown(self):
+        for collection in self.db.collection_names():
+            if 'system.' in collection:
+                continue
+            self.db.drop_collection(collection)
+
+    def test_definition(self):
+        """Ensure that document may be defined using fields.
+        """
+        self.assertEqual(['age', 'name', 'id'], self.Person._fields.keys())
+        self.assertEqual([IntField, StringField, ObjectIdField],
+                        [x.__class__ for x in self.Person._fields.values()])
+
+    def test_get_db(self):
+        """Ensure that get_db returns the expected db.
+        """
+        db = self.Person._get_db()
+        self.assertEqual(self.db, db)
+
+    def test_get_collection_name(self):
+        """Ensure that get_collection_name returns the expected collection
+        name.
+        """
+        collection_name = 'person'
+        self.assertEqual(collection_name, self.Person._get_collection_name())
+
+    def test_get_collection(self):
+        """Ensure that get_collection returns the expected collection.
+        """
+        collection_name = 'person'
+        collection = self.Person._get_collection()
+        self.assertEqual(self.db[collection_name], collection)
+
+    def test_drop_collection(self):
+        """Ensure that the collection may be dropped from the database.
+        """
+        collection_name = 'person'
+        self.Person(name='Test').save()
+        self.assertTrue(collection_name in self.db.collection_names())
+
+        self.Person.drop_collection()
+        self.assertFalse(collection_name in self.db.collection_names())
+
+    def test_register_delete_rule(self):
+        """Ensure that register delete rule adds a delete rule to the document
+        meta.
+        """
+        class Job(Document):
+            employee = ReferenceField(self.Person)
+
+        self.assertEqual(self.Person._meta.get('delete_rules'), None)
+
+        self.Person.register_delete_rule(Job, 'employee', NULLIFY)
+        self.assertEqual(self.Person._meta['delete_rules'],
+                         {(Job, 'employee'): NULLIFY})
+
+    def test_collection_naming(self):
+        """Ensure that a collection with a specified name may be used.
+        """
+
+        class DefaultNamingTest(Document):
+            pass
+        self.assertEqual('default_naming_test',
+                         DefaultNamingTest._get_collection_name())
+
+        class CustomNamingTest(Document):
+            meta = {'collection': 'pimp_my_collection'}
+
+        self.assertEqual('pimp_my_collection',
+                         CustomNamingTest._get_collection_name())
+
+        class DynamicNamingTest(Document):
+            meta = {'collection': lambda c: "DYNAMO"}
+        self.assertEqual('DYNAMO', DynamicNamingTest._get_collection_name())
+
+        # Use Abstract class to handle backwards compatibility
+        class BaseDocument(Document):
+            meta = {
+                'abstract': True,
+                'collection': lambda c: c.__name__.lower()
+            }
+
+        class OldNamingConvention(BaseDocument):
+            pass
+        self.assertEqual('oldnamingconvention',
+                         OldNamingConvention._get_collection_name())
+
+        class InheritedAbstractNamingTest(BaseDocument):
+            meta = {'collection': 'wibble'}
+        self.assertEqual('wibble',
+                         InheritedAbstractNamingTest._get_collection_name())
+
+        # Mixin tests
+        class BaseMixin(object):
+            meta = {
+                'collection': lambda c: c.__name__.lower()
+            }
+
+        class OldMixinNamingConvention(Document, BaseMixin):
+            pass
+        self.assertEqual('oldmixinnamingconvention',
+                          OldMixinNamingConvention._get_collection_name())
+
+        class BaseMixin(object):
+            meta = {
+                'collection': lambda c: c.__name__.lower()
+            }
+
+        class BaseDocument(Document, BaseMixin):
+            meta = {'allow_inheritance': True}
+
+        class MyDocument(BaseDocument):
+            pass
+
+        self.assertEqual('basedocument', MyDocument._get_collection_name())
+
+    def test_custom_collection_name_operations(self):
+        """Ensure that a collection with a specified name is used as expected.
+        """
+        collection_name = 'personCollTest'
+
+        class Person(Document):
+            name = StringField()
+            meta = {'collection': collection_name}
+
+        Person(name="Test User").save()
+        self.assertTrue(collection_name in self.db.collection_names())
+
+        user_obj = self.db[collection_name].find_one()
+        self.assertEqual(user_obj['name'], "Test User")
+
+        user_obj = Person.objects[0]
+        self.assertEqual(user_obj.name, "Test User")
+
+        Person.drop_collection()
+        self.assertFalse(collection_name in self.db.collection_names())
+
+    def test_collection_name_and_primary(self):
+        """Ensure that a collection with a specified name may be used.
+        """
+
+        class Person(Document):
+            name = StringField(primary_key=True)
+            meta = {'collection': 'app'}
+
+        Person(name="Test User").save()
+
+        user_obj = Person.objects.first()
+        self.assertEqual(user_obj.name, "Test User")
+
+        Person.drop_collection()
+
+
+if __name__ == '__main__':
+    unittest.main()