Mongoengine: Unique does not work in pytest and mongomock

[ludusrusso]

I've notice an issue with mongomock and pytest:
mongoengine.errors.NotUniqueError is not raised in my pytest environment, while it works in production with no mongomock db!

class User(LoginDocument):
    id = db.SequenceField(primary_key=True)
    email = db.EmailField(required=True, unique=True)
    password_hash = db.StringField(required=True)

And this test fails:

def test_multiple_email(app, db):
    with pytest.raises(NotUniqueError):
        user1 = User(email="[email protected]", password="")
        user1.save()
        user2 = User(email="[email protected]", password="asd")
        user2.save()

app = <Flask 'server'>
db = <flask_mongoengine.MongoEngine object at 0x10d45a9b0>

    def test_multiple_email(app, db):
        with pytest.raises(NotUniqueError):
            user1 = User(email="[email protected]", password="")
            user1.save()
            user2 = User(email="[email protected]", password="asd")
>           user2.save()
E           Failed: DID NOT RAISE <class 'mongoengine.errors.NotUniqueError'>

[pablopalacios]

Certainly this is a mongomock issue and not a mongoengine one.

[bagerard]

Looks like this can be closed