def test__find_notequal_by_value(self):
        bob = {'_id': 1, 'name': 'bob', 'sheepness': {'sometimes': True}}
        sam = {'_id': 2, 'name': 'sam', 'sheepness': {'sometimes': True}}
        a_goat = {'_id': 3, 'goatness': 'very', 'sheepness': {}}
        self.cmp.do.insert([bob, sam, a_goat])
        self.cmp.compare_ignore_order.find({'goatness': None})
        self.cmp.compare_ignore_order.find({'sheepness.sometimes': None})
Test searching for None.
dataset/ETHPy150Open vmalloc/mongomock/tests/test__mongomock.py/MongoClientCollectionTest.test__find_notequal_by_value