test_using.py

# Copyright: See the LICENSE file.

"""Tests using factory."""


import collections
import datetime
import os
import sys
import unittest

import factory
from factory import errors

from . import utils

try:
    import django  # noqa: F401
    SKIP_DJANGO = False
except ImportError:
    SKIP_DJANGO = True


class TestObject:
    def __init__(self, one=None, two=None, three=None, four=None, five=None):
        self.one = one
        self.two = two
        self.three = three
        self.four = four
        self.five = five

    def as_dict(self):
        return dict(
            one=self.one,
            two=self.two,
            three=self.three,
            four=self.four,
            five=self.five,
        )


class Dummy:
    def __init__(self, **kwargs):
        self._fields = set(kwargs)
        for k, v in kwargs.items():
            setattr(self, k, v)

    @property
    def as_dict(self):
        return {field: getattr(self, field) for field in self._fields}

    def __repr__(self):
        return '%s(%s)' % (
            self.__class__.__name__,
            ', '.join('%s=%r' % pair for pair in sorted(self.as_dict.items()))
        )


class FakeModel:
    @classmethod
    def create(cls, **kwargs):
        instance = cls(**kwargs)
        instance.id = 1
        return instance

    class FakeModelManager:
        def get_or_create(self, **kwargs):
            defaults = kwargs.pop('defaults', {})
            kwargs.update(defaults)
            instance = FakeModel.create(**kwargs)
            instance.id = 2
            instance._defaults = defaults
            return instance, True

        def create(self, **kwargs):
            instance = FakeModel.create(**kwargs)
            instance.id = 2
            instance._defaults = None
            return instance

        def values_list(self, *args, **kwargs):
            return self

        def order_by(self, *args, **kwargs):
            return [1]

        def using(self, db):
            return self

    objects = FakeModelManager()

    def __init__(self, **kwargs):
        for name, value in kwargs.items():
            setattr(self, name, value)
            self.id = None


class FakeModelFactory(factory.Factory):
    class Meta:
        abstract = True

    @classmethod
    def _create(cls, model_class, *args, **kwargs):
        return model_class.create(**kwargs)


class TestModel(FakeModel):
    pass


class SimpleBuildTestCase(unittest.TestCase):
    """Tests the minimalist 'factory.build/create' functions."""

    def test_build(self):
        obj = factory.build(TestObject, two=2)
        self.assertEqual(obj.one, None)
        self.assertEqual(obj.two, 2)
        self.assertEqual(obj.three, None)
        self.assertEqual(obj.four, None)

    def test_complex(self):
        obj = factory.build(TestObject, two=2, three=factory.LazyAttribute(lambda o: o.two + 1))
        self.assertEqual(obj.one, None)
        self.assertEqual(obj.two, 2)
        self.assertEqual(obj.three, 3)
        self.assertEqual(obj.four, None)

    def test_build_batch(self):
        objs = factory.build_batch(
            TestObject,
            4,
            two=2,
            three=factory.LazyAttribute(lambda o: o.two + 1),
        )

        self.assertEqual(4, len(objs))
        self.assertEqual(4, len(set(objs)))

        for obj in objs:
            self.assertEqual(obj.one, None)
            self.assertEqual(obj.two, 2)
            self.assertEqual(obj.three, 3)
            self.assertEqual(obj.four, None)

    def test_create(self):
        obj = factory.create(FakeModel, foo='bar')
        self.assertEqual(obj.id, None)
        self.assertEqual(obj.foo, 'bar')

    @unittest.skipIf(SKIP_DJANGO, "django tests disabled.")
    def test_create_custom_base(self):
        obj = factory.create(FakeModel, foo='bar', FACTORY_CLASS=factory.django.DjangoModelFactory)
        self.assertEqual(obj.id, 2)
        self.assertEqual(obj.foo, 'bar')

    def test_create_batch(self):
        objs = factory.create_batch(FakeModel, 4, foo='bar')

        self.assertEqual(4, len(objs))
        self.assertEqual(4, len(set(objs)))

        for obj in objs:
            self.assertEqual(obj.id, None)
            self.assertEqual(obj.foo, 'bar')

    @unittest.skipIf(SKIP_DJANGO, "django tests disabled.")
    def test_create_batch_custom_base(self):
        objs = factory.create_batch(
            FakeModel,
            4,
            foo='bar',
            FACTORY_CLASS=factory.django.DjangoModelFactory,
        )

        self.assertEqual(4, len(objs))
        self.assertEqual(4, len(set(objs)))

        for obj in objs:
            self.assertEqual(obj.id, 2)
            self.assertEqual(obj.foo, 'bar')

    def test_stub(self):
        obj = factory.stub(TestObject, three=3)
        self.assertEqual(obj.three, 3)
        self.assertFalse(hasattr(obj, 'two'))

    def test_stub_batch(self):
        objs = factory.stub_batch(FakeModel, 4, foo='bar')

        self.assertEqual(4, len(objs))
        self.assertEqual(4, len(set(objs)))

        for obj in objs:
            self.assertFalse(hasattr(obj, 'id'))
            self.assertEqual(obj.foo, 'bar')

    def test_generate_build(self):
        obj = factory.generate(FakeModel, factory.BUILD_STRATEGY, foo='bar')
        self.assertEqual(obj.id, None)
        self.assertEqual(obj.foo, 'bar')

    def test_generate_create(self):
        obj = factory.generate(FakeModel, factory.CREATE_STRATEGY, foo='bar')
        self.assertEqual(obj.id, None)
        self.assertEqual(obj.foo, 'bar')

    @unittest.skipIf(SKIP_DJANGO, "django tests disabled.")
    def test_generate_create_custom_base(self):
        obj = factory.generate(
            FakeModel,
            factory.CREATE_STRATEGY,
            foo='bar',
            FACTORY_CLASS=factory.django.DjangoModelFactory,
        )
        self.assertEqual(obj.id, 2)
        self.assertEqual(obj.foo, 'bar')

    def test_generate_stub(self):
        obj = factory.generate(FakeModel, factory.STUB_STRATEGY, foo='bar')
        self.assertFalse(hasattr(obj, 'id'))
        self.assertEqual(obj.foo, 'bar')

    def test_generate_batch_build(self):
        objs = factory.generate_batch(FakeModel, factory.BUILD_STRATEGY, 20, foo='bar')

        self.assertEqual(20, len(objs))
        self.assertEqual(20, len(set(objs)))

        for obj in objs:
            self.assertEqual(obj.id, None)
            self.assertEqual(obj.foo, 'bar')

    def test_generate_batch_create(self):
        objs = factory.generate_batch(FakeModel, factory.CREATE_STRATEGY, 20, foo='bar')

        self.assertEqual(20, len(objs))
        self.assertEqual(20, len(set(objs)))

        for obj in objs:
            self.assertEqual(obj.id, None)
            self.assertEqual(obj.foo, 'bar')

    @unittest.skipIf(SKIP_DJANGO, "django tests disabled.")
    def test_generate_batch_create_custom_base(self):
        objs = factory.generate_batch(
            FakeModel,
            factory.CREATE_STRATEGY,
            20,
            foo='bar',
            FACTORY_CLASS=factory.django.DjangoModelFactory,
        )

        self.assertEqual(20, len(objs))
        self.assertEqual(20, len(set(objs)))

        for obj in objs:
            self.assertEqual(obj.id, 2)
            self.assertEqual(obj.foo, 'bar')

    def test_generate_batch_stub(self):
        objs = factory.generate_batch(FakeModel, factory.STUB_STRATEGY, 20, foo='bar')

        self.assertEqual(20, len(objs))
        self.assertEqual(20, len(set(objs)))

        for obj in objs:
            self.assertFalse(hasattr(obj, 'id'))
            self.assertEqual(obj.foo, 'bar')

    def test_simple_generate_build(self):
        obj = factory.simple_generate(FakeModel, False, foo='bar')
        self.assertEqual(obj.id, None)
        self.assertEqual(obj.foo, 'bar')

    def test_simple_generate_create(self):
        obj = factory.simple_generate(FakeModel, True, foo='bar')
        self.assertEqual(obj.id, None)
        self.assertEqual(obj.foo, 'bar')

    @unittest.skipIf(SKIP_DJANGO, "django tests disabled.")
    def test_simple_generate_create_custom_base(self):
        obj = factory.simple_generate(FakeModel, True, foo='bar', FACTORY_CLASS=factory.django.DjangoModelFactory)
        self.assertEqual(obj.id, 2)
        self.assertEqual(obj.foo, 'bar')

    def test_simple_generate_batch_build(self):
        objs = factory.simple_generate_batch(FakeModel, False, 20, foo='bar')

        self.assertEqual(20, len(objs))
        self.assertEqual(20, len(set(objs)))

        for obj in objs:
            self.assertEqual(obj.id, None)
            self.assertEqual(obj.foo, 'bar')

    def test_simple_generate_batch_create(self):
        objs = factory.simple_generate_batch(FakeModel, True, 20, foo='bar')

        self.assertEqual(20, len(objs))
        self.assertEqual(20, len(set(objs)))

        for obj in objs:
            self.assertEqual(obj.id, None)
            self.assertEqual(obj.foo, 'bar')

    @unittest.skipIf(SKIP_DJANGO, "django tests disabled.")
    def test_simple_generate_batch_create_custom_base(self):
        objs = factory.simple_generate_batch(
            FakeModel,
            True,
            20,
            foo='bar',
            FACTORY_CLASS=factory.django.DjangoModelFactory,
        )

        self.assertEqual(20, len(objs))
        self.assertEqual(20, len(set(objs)))

        for obj in objs:
            self.assertEqual(obj.id, 2)
            self.assertEqual(obj.foo, 'bar')

    def test_make_factory(self):
        fact = factory.make_factory(TestObject, two=2, three=factory.LazyAttribute(lambda o: o.two + 1))

        obj = fact.build()
        self.assertEqual(obj.one, None)
        self.assertEqual(obj.two, 2)
        self.assertEqual(obj.three, 3)
        self.assertEqual(obj.four, None)

        obj = fact.build(two=4)
        self.assertEqual(obj.one, None)
        self.assertEqual(obj.two, 4)
        self.assertEqual(obj.three, 5)
        self.assertEqual(obj.four, None)

    def test_build_to_dict(self):
        # We have a generic factory
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = 'one'
            two = factory.LazyAttribute(lambda o: o.one * 2)

        # Now, get a dict out of it
        obj = factory.build(dict, FACTORY_CLASS=TestObjectFactory)
        self.assertEqual({'one': 'one', 'two': 'oneone'}, obj)


class UsingFactoryTestCase(unittest.TestCase):
    def test_attribute(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = 'one'

        test_object = TestObjectFactory.build()
        self.assertEqual(test_object.one, 'one')

    def test_inheriting_model_class(self):
        class TestObjectFactory(factory.Factory, TestObject):
            class Meta:
                model = TestObject

            one = 'one'

        test_object = TestObjectFactory.build()
        self.assertEqual(test_object.one, 'one')

    def test_abstract(self):
        class SomeAbstractFactory(factory.Factory):
            class Meta:
                abstract = True

            one = 'one'

        class InheritedFactory(SomeAbstractFactory):
            class Meta:
                model = TestObject

        test_object = InheritedFactory.build()
        self.assertEqual(test_object.one, 'one')

    def test_sequence(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = factory.Sequence(lambda n: 'one%d' % n)
            two = factory.Sequence(lambda n: 'two%d' % n)

        test_object0 = TestObjectFactory.build()
        self.assertEqual(test_object0.one, 'one0')
        self.assertEqual(test_object0.two, 'two0')

        test_object1 = TestObjectFactory.build()
        self.assertEqual(test_object1.one, 'one1')
        self.assertEqual(test_object1.two, 'two1')

    def test_sequence_custom_begin(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            @classmethod
            def _setup_next_sequence(cls):
                return 42

            one = factory.Sequence(lambda n: 'one%d' % n)
            two = factory.Sequence(lambda n: 'two%d' % n)

        test_object0 = TestObjectFactory.build()
        self.assertEqual('one42', test_object0.one)
        self.assertEqual('two42', test_object0.two)

        test_object1 = TestObjectFactory.build()
        self.assertEqual('one43', test_object1.one)
        self.assertEqual('two43', test_object1.two)

    def test_sequence_override(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = factory.Sequence(lambda n: 'one%d' % n)

        o1 = TestObjectFactory()
        o2 = TestObjectFactory()
        o3 = TestObjectFactory(__sequence=42)
        o4 = TestObjectFactory()

        self.assertEqual('one0', o1.one)
        self.assertEqual('one1', o2.one)
        self.assertEqual('one42', o3.one)
        self.assertEqual('one2', o4.one)

    def test_custom_create(self):
        class TestModelFactory(factory.Factory):
            class Meta:
                model = TestModel

            two = 2

            @classmethod
            def _create(cls, model_class, *args, **kwargs):
                obj = model_class.create(**kwargs)
                obj.properly_created = True
                return obj

        obj = TestModelFactory.create(one=1)
        self.assertEqual(1, obj.one)
        self.assertEqual(2, obj.two)
        self.assertEqual(1, obj.id)
        self.assertTrue(obj.properly_created)

    def test_non_django_create(self):
        class NonDjango:
            def __init__(self, x, y=2):
                self.x = x
                self.y = y

        class NonDjangoFactory(factory.Factory):
            class Meta:
                model = NonDjango

            x = 3

        obj = NonDjangoFactory.create()
        self.assertEqual(3, obj.x)
        self.assertEqual(2, obj.y)

    def test_sequence_batch(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = factory.Sequence(lambda n: 'one%d' % n)
            two = factory.Sequence(lambda n: 'two%d' % n)

        objs = TestObjectFactory.build_batch(20)

        self.assertEqual(20, len(objs))
        self.assertEqual(20, len(set(objs)))
        for i, obj in enumerate(objs):
            self.assertEqual('one%d' % i, obj.one)
            self.assertEqual('two%d' % i, obj.two)

    def test_lazy_attribute(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = factory.LazyAttribute(lambda a: 'abc')
            two = factory.LazyAttribute(lambda a: a.one + ' xyz')

        test_object = TestObjectFactory.build()
        self.assertEqual(test_object.one, 'abc')
        self.assertEqual(test_object.two, 'abc xyz')

    def test_lazy_attribute_sequence(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = factory.LazyAttributeSequence(lambda a, n: 'abc%d' % n)
            two = factory.LazyAttributeSequence(lambda a, n: a.one + ' xyz%d' % n)

        test_object0 = TestObjectFactory.build()
        self.assertEqual(test_object0.one, 'abc0')
        self.assertEqual(test_object0.two, 'abc0 xyz0')

        test_object1 = TestObjectFactory.build()
        self.assertEqual(test_object1.one, 'abc1')
        self.assertEqual(test_object1.two, 'abc1 xyz1')

    def test_lazy_attribute_decorator(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            @factory.lazy_attribute
            def one(a):
                return 'one'

        test_object = TestObjectFactory.build()
        self.assertEqual(test_object.one, 'one')

    def test_self_attribute(self):
        class TmpObj:
            n = 3

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = 'xx'
            two = factory.SelfAttribute('one')
            three = TmpObj()
            four = factory.SelfAttribute('three.n')
            five = factory.SelfAttribute('three.nnn', 5)

        test_object = TestObjectFactory.build(one=1)
        self.assertEqual(1, test_object.two)
        self.assertEqual(3, test_object.three.n)
        self.assertEqual(3, test_object.four)
        self.assertEqual(5, test_object.five)

    def test_self_attribute_parent(self):
        class TestModel2(FakeModel):
            pass

        class TestModelFactory(FakeModelFactory):
            class Meta:
                model = TestModel
            one = 3
            three = factory.SelfAttribute('..bar')

        class TestModel2Factory(FakeModelFactory):
            class Meta:
                model = TestModel2
            bar = 4
            two = factory.SubFactory(TestModelFactory, one=1)

        test_model = TestModel2Factory()
        self.assertEqual(4, test_model.two.three)

    def test_sequence_decorator(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            @factory.sequence
            def one(n):
                return 'one%d' % n

        test_object = TestObjectFactory.build()
        self.assertEqual(test_object.one, 'one0')

    def test_lazy_attribute_sequence_decorator(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            @factory.lazy_attribute_sequence
            def one(a, n):
                return 'one%d' % n

            @factory.lazy_attribute_sequence
            def two(a, n):
                return a.one + ' two%d' % n

        test_object = TestObjectFactory.build()
        self.assertEqual(test_object.one, 'one0')
        self.assertEqual(test_object.two, 'one0 two0')

    def test_build_with_parameters(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = factory.Sequence(lambda n: 'one%d' % n)
            two = factory.Sequence(lambda n: 'two%d' % n)

        test_object0 = TestObjectFactory.build(three='three')
        self.assertEqual(test_object0.one, 'one0')
        self.assertEqual(test_object0.two, 'two0')
        self.assertEqual(test_object0.three, 'three')

        test_object1 = TestObjectFactory.build(one='other')
        self.assertEqual(test_object1.one, 'other')
        self.assertEqual(test_object1.two, 'two1')

    def test_create(self):
        class TestModelFactory(FakeModelFactory):
            class Meta:
                model = TestModel

            one = 'one'

        test_model = TestModelFactory.create()
        self.assertEqual(test_model.one, 'one')
        self.assertTrue(test_model.id)

    def test_create_batch(self):
        class TestModelFactory(FakeModelFactory):
            class Meta:
                model = TestModel

            one = 'one'

        objs = TestModelFactory.create_batch(20, two=factory.Sequence(int))

        self.assertEqual(20, len(objs))
        self.assertEqual(20, len(set(objs)))

        for i, obj in enumerate(objs):
            self.assertEqual('one', obj.one)
            self.assertEqual(i, obj.two)
            self.assertTrue(obj.id)

    def test_generate_build(self):
        class TestModelFactory(FakeModelFactory):
            class Meta:
                model = TestModel

            one = 'one'

        test_model = TestModelFactory.generate(factory.BUILD_STRATEGY)
        self.assertEqual(test_model.one, 'one')
        self.assertFalse(test_model.id)

    def test_generate_create(self):
        class TestModelFactory(FakeModelFactory):
            class Meta:
                model = TestModel

            one = 'one'

        test_model = TestModelFactory.generate(factory.CREATE_STRATEGY)
        self.assertEqual(test_model.one, 'one')
        self.assertTrue(test_model.id)

    def test_generate_stub(self):
        class TestModelFactory(FakeModelFactory):
            class Meta:
                model = TestModel

            one = 'one'

        test_model = TestModelFactory.generate(factory.STUB_STRATEGY)
        self.assertEqual(test_model.one, 'one')
        self.assertFalse(hasattr(test_model, 'id'))

    def test_generate_batch_build(self):
        class TestModelFactory(FakeModelFactory):
            class Meta:
                model = TestModel

            one = 'one'

        objs = TestModelFactory.generate_batch(factory.BUILD_STRATEGY, 20, two='two')

        self.assertEqual(20, len(objs))
        self.assertEqual(20, len(set(objs)))

        for i, obj in enumerate(objs):
            self.assertEqual('one', obj.one)
            self.assertEqual('two', obj.two)
            self.assertFalse(obj.id)

    def test_generate_batch_create(self):
        class TestModelFactory(FakeModelFactory):
            class Meta:
                model = TestModel

            one = 'one'

        objs = TestModelFactory.generate_batch(factory.CREATE_STRATEGY, 20, two='two')

        self.assertEqual(20, len(objs))
        self.assertEqual(20, len(set(objs)))

        for i, obj in enumerate(objs):
            self.assertEqual('one', obj.one)
            self.assertEqual('two', obj.two)
            self.assertTrue(obj.id)

    def test_generate_batch_stub(self):
        class TestModelFactory(FakeModelFactory):
            class Meta:
                model = TestModel

            one = 'one'

        objs = TestModelFactory.generate_batch(factory.STUB_STRATEGY, 20, two='two')

        self.assertEqual(20, len(objs))
        self.assertEqual(20, len(set(objs)))

        for i, obj in enumerate(objs):
            self.assertEqual('one', obj.one)
            self.assertEqual('two', obj.two)
            self.assertFalse(hasattr(obj, 'id'))

    def test_simple_generate_build(self):
        class TestModelFactory(FakeModelFactory):
            class Meta:
                model = TestModel

            one = 'one'

        test_model = TestModelFactory.simple_generate(False)
        self.assertEqual(test_model.one, 'one')
        self.assertFalse(test_model.id)

    def test_simple_generate_create(self):
        class TestModelFactory(FakeModelFactory):
            class Meta:
                model = TestModel

            one = 'one'

        test_model = TestModelFactory.simple_generate(True)
        self.assertEqual(test_model.one, 'one')
        self.assertTrue(test_model.id)

    def test_simple_generate_batch_build(self):
        class TestModelFactory(FakeModelFactory):
            class Meta:
                model = TestModel

            one = 'one'

        objs = TestModelFactory.simple_generate_batch(False, 20, two='two')

        self.assertEqual(20, len(objs))
        self.assertEqual(20, len(set(objs)))

        for i, obj in enumerate(objs):
            self.assertEqual('one', obj.one)
            self.assertEqual('two', obj.two)
            self.assertFalse(obj.id)

    def test_simple_generate_batch_create(self):
        class TestModelFactory(FakeModelFactory):
            class Meta:
                model = TestModel

            one = 'one'

        objs = TestModelFactory.simple_generate_batch(True, 20, two='two')

        self.assertEqual(20, len(objs))
        self.assertEqual(20, len(set(objs)))

        for i, obj in enumerate(objs):
            self.assertEqual('one', obj.one)
            self.assertEqual('two', obj.two)
            self.assertTrue(obj.id)

    def test_stub_batch(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = 'one'
            two = factory.LazyAttribute(lambda a: a.one + ' two')
            three = factory.Sequence(lambda n: int(n))

        objs = TestObjectFactory.stub_batch(
            20,
            one=factory.Sequence(lambda n: str(n)),
        )

        self.assertEqual(20, len(objs))
        self.assertEqual(20, len(set(objs)))

        for i, obj in enumerate(objs):
            self.assertEqual(str(i), obj.one)
            self.assertEqual('%d two' % i, obj.two)
            self.assertEqual(i, obj.three)

    def test_inheritance(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = 'one'
            two = factory.LazyAttribute(lambda a: a.one + ' two')

        class TestObjectFactory2(TestObjectFactory):
            class Meta:
                model = TestObject

            three = 'three'
            four = factory.LazyAttribute(lambda a: a.three + ' four')

        test_object = TestObjectFactory2.build()
        self.assertEqual(test_object.one, 'one')
        self.assertEqual(test_object.two, 'one two')
        self.assertEqual(test_object.three, 'three')
        self.assertEqual(test_object.four, 'three four')

        test_object_alt = TestObjectFactory.build()
        self.assertEqual(None, test_object_alt.three)

    def test_override_inherited(self):
        """Overriding inherited declarations"""
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = 'one'

        class TestObjectFactory2(TestObjectFactory):
            one = 'two'

        test_object = TestObjectFactory2.build()
        self.assertEqual('two', test_object.one)

    def test_override_inherited_deep(self):
        """Overriding inherited declarations"""
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = 'one'

        class TestObjectFactory2(TestObjectFactory):
            one = 'two'

        class TestObjectFactory3(TestObjectFactory2):
            pass

        test_object = TestObjectFactory3.build()
        self.assertEqual('two', test_object.one)

    def test_inheritance_and_sequences(self):
        """Sequence counters should be kept within an inheritance chain."""
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = factory.Sequence(lambda n: n)

        class TestObjectFactory2(TestObjectFactory):
            class Meta:
                model = TestObject

        to1a = TestObjectFactory()
        self.assertEqual(0, to1a.one)
        to2a = TestObjectFactory2()
        self.assertEqual(1, to2a.one)
        to1b = TestObjectFactory()
        self.assertEqual(2, to1b.one)
        to2b = TestObjectFactory2()
        self.assertEqual(3, to2b.one)

    def test_inheritance_sequence_inheriting_objects(self):
        """Sequence counters are kept with inheritance, incl. misc objects."""
        class TestObject2(TestObject):
            pass

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = factory.Sequence(lambda n: n)

        class TestObjectFactory2(TestObjectFactory):
            class Meta:
                model = TestObject2

        to1a = TestObjectFactory()
        self.assertEqual(0, to1a.one)
        to2a = TestObjectFactory2()
        self.assertEqual(1, to2a.one)
        to1b = TestObjectFactory()
        self.assertEqual(2, to1b.one)
        to2b = TestObjectFactory2()
        self.assertEqual(3, to2b.one)

    def test_inheritance_sequence_unrelated_objects(self):
        """Sequence counters are kept with inheritance, unrelated objects.

        See issue https://github.com/FactoryBoy/factory_boy/issues/93

        Problem: sequence counter is somewhat shared between factories
        until the "slave" factory has been called.
        """

        class TestObject2:
            def __init__(self, one):
                self.one = one

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = factory.Sequence(lambda n: n)

        class TestObjectFactory2(TestObjectFactory):
            class Meta:
                model = TestObject2

        to1a = TestObjectFactory()
        self.assertEqual(0, to1a.one)
        to2a = TestObjectFactory2()
        self.assertEqual(0, to2a.one)
        to1b = TestObjectFactory()
        self.assertEqual(1, to1b.one)
        to2b = TestObjectFactory2()
        self.assertEqual(1, to2b.one)

    def test_inheritance_with_inherited_class(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = 'one'
            two = factory.LazyAttribute(lambda a: a.one + ' two')

        class TestFactory(TestObjectFactory):
            three = 'three'
            four = factory.LazyAttribute(lambda a: a.three + ' four')

        test_object = TestFactory.build()
        self.assertEqual(test_object.one, 'one')
        self.assertEqual(test_object.two, 'one two')
        self.assertEqual(test_object.three, 'three')
        self.assertEqual(test_object.four, 'three four')

    def test_dual_inheritance(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = 'one'

        class TestOtherFactory(factory.Factory):
            class Meta:
                model = TestObject
            two = 'two'
            four = 'four'

        class TestFactory(TestObjectFactory, TestOtherFactory):
            three = 'three'

        obj = TestFactory.build(two=2)
        self.assertEqual('one', obj.one)
        self.assertEqual(2, obj.two)
        self.assertEqual('three', obj.three)
        self.assertEqual('four', obj.four)

    def test_class_method_accessible(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            @classmethod
            def alt_create(cls, **kwargs):
                return kwargs

        self.assertEqual(TestObjectFactory.alt_create(foo=1), {"foo": 1})

    def test_static_method_accessible(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            @staticmethod
            def alt_create(**kwargs):
                return kwargs

        self.assertEqual(TestObjectFactory.alt_create(foo=1), {"foo": 1})

    def test_inline_args(self):
        class TestObject:
            def __init__(self, *args, **kwargs):
                self.args = args
                self.kwargs = kwargs

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
                inline_args = ('x', 'y')

            x = 1
            y = 2
            z = 3
            t = 4

        obj = TestObjectFactory.build(x=42, z=5)
        self.assertEqual((42, 2), obj.args)
        self.assertEqual({'z': 5, 't': 4}, obj.kwargs)

    def test_exclude(self):
        class TestObject:
            def __init__(self, *args, **kwargs):
                self.args = args
                self.kwargs = kwargs

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
                exclude = ('x', 'z')

            x = 1
            y = 2
            z = 3
            t = 4

        obj = TestObjectFactory.build(x=42, z=5)
        self.assertEqual((), obj.args)
        self.assertEqual({'y': 2, 't': 4}, obj.kwargs)

    def test_exclude_and_inline_args(self):
        class TestObject:
            def __init__(self, *args, **kwargs):
                self.args = args
                self.kwargs = kwargs

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
                exclude = ('x', 'z')
                inline_args = ('y',)

            x = 1
            y = 2
            z = 3
            t = 4

        obj = TestObjectFactory.build(x=42, z=5)
        self.assertEqual((2,), obj.args)
        self.assertEqual({'t': 4}, obj.kwargs)


class NonKwargParametersTestCase(unittest.TestCase):
    def test_build(self):
        class TestObject:
            def __init__(self, *args, **kwargs):
                self.args = args
                self.kwargs = kwargs

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
                inline_args = ('one', 'two',)

            one = 1
            two = 2
            three = 3

        obj = TestObjectFactory.build()
        self.assertEqual((1, 2), obj.args)
        self.assertEqual({'three': 3}, obj.kwargs)

    def test_create(self):
        class TestObject:
            def __init__(self, *args, **kwargs):
                self.args = None
                self.kwargs = None

            @classmethod
            def create(cls, *args, **kwargs):
                inst = cls()
                inst.args = args
                inst.kwargs = kwargs
                return inst

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
                inline_args = ('one', 'two')

            one = 1
            two = 2
            three = 3

            @classmethod
            def _create(cls, model_class, *args, **kwargs):
                return model_class.create(*args, **kwargs)

        obj = TestObjectFactory.create()
        self.assertEqual((1, 2), obj.args)
        self.assertEqual({'three': 3}, obj.kwargs)


class KwargAdjustTestCase(unittest.TestCase):
    """Tests for the _adjust_kwargs method."""

    def test_build(self):
        class TestObject:
            def __init__(self, *args, **kwargs):
                self.args = args
                self.kwargs = kwargs

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            @classmethod
            def _adjust_kwargs(cls, **kwargs):
                kwargs['foo'] = len(kwargs)
                return kwargs

        obj = TestObjectFactory.build(x=1, y=2, z=3)
        self.assertEqual({'x': 1, 'y': 2, 'z': 3, 'foo': 3}, obj.kwargs)
        self.assertEqual((), obj.args)

    def test_rename(self):
        class TestObject:
            def __init__(self, attributes=None):
                self.attributes = attributes

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
                rename = {'attributes_': 'attributes'}

            attributes_ = 42

        obj = TestObjectFactory.build()
        self.assertEqual(42, obj.attributes)

    def test_rename_non_existent_kwarg(self):
        # see https://github.com/FactoryBoy/factory_boy/issues/504
        class TestObject:
            def __init__(self, attributes=None):
                self.attributes = attributes

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
                rename = {'form_attributes': 'attributes'}

        try:
            TestObjectFactory()
        except KeyError:
            self.fail('should not raise KeyError for missing renamed attributes')


class MaybeTestCase(unittest.TestCase):
    def test_simple_maybe(self):
        class DummyFactory(factory.Factory):
            class Meta:
                model = Dummy

            # Undeclared: key = None
            both = factory.Maybe('key', 1, 2)
            yes = factory.Maybe('key', 1)
            no = factory.Maybe('key', no_declaration=2)
            none = factory.Maybe('key')

        obj_default = DummyFactory.build()
        obj_true = DummyFactory.build(key=True)
        obj_false = DummyFactory.build(key=False)

        self.assertEqual(dict(both=2, no=2), obj_default.as_dict)
        self.assertEqual(dict(key=True, both=1, yes=1), obj_true.as_dict)
        self.assertEqual(dict(key=False, both=2, no=2), obj_false.as_dict)

    def test_declarations(self):
        class DummyFactory(factory.Factory):
            class Meta:
                model = Dummy

            a = 0
            b = 1

            # biggest = 'b' if .b > .a else 'a'
            biggest = factory.Maybe(factory.LazyAttribute(lambda o: o.a < o.b), 'b', 'a')
            # max_value = .b if .b > .a else .a = max(.a, .b)
            max_value = factory.Maybe(
                factory.LazyAttribute(lambda o: o.a < o.b),
                factory.SelfAttribute('b'),
                factory.SelfAttribute('a'),
            )

        obj_ordered = DummyFactory.build(a=1, b=2)
        obj_equal = DummyFactory.build(a=3, b=3)
        obj_reverse = DummyFactory.build(a=5, b=4)

        self.assertEqual(dict(a=1, b=2, biggest='b', max_value=2, ), obj_ordered.as_dict)
        self.assertEqual(dict(a=3, b=3, biggest='a', max_value=3, ), obj_equal.as_dict)
        self.assertEqual(dict(a=5, b=4, biggest='a', max_value=5, ), obj_reverse.as_dict)

    def test_post_generation(self):

        # Helpers
        @factory.post_generation
        def square(obj, *args, **kwargs):
            obj.value *= obj.value

        @factory.post_generation
        def quintuple(obj, *args, **kwargs):
            obj.value *= 5

        @factory.post_generation
        def double(obj, *args, **kwargs):
            obj.value *= 2

        @factory.post_generation
        def decrement(obj, *args, **kwargs):
            obj.value -= 1

        class DummyFactory(factory.Factory):
            class Meta:
                model = Dummy

            value = 0
            square_it = factory.Maybe('square', square)
            quintuple_it = factory.Maybe('quintuple', quintuple)
            adjust_nums = factory.Maybe(
                factory.LazyAttribute(lambda o: o.value % 2 == 0),
                double,
                decrement,
            )

        obj_untouched = DummyFactory.build(value=4)
        obj_squared = DummyFactory.build(value=5, square=True)
        obj_combined = DummyFactory.build(value=6, square=True, quintuple=True)

        self.assertEqual(4 * 2, obj_untouched.value)
        self.assertEqual(5 ** 2 - 1, obj_squared.value)
        self.assertEqual(6 ** 2 * 5 * 2, obj_combined.value)


class TraitTestCase(unittest.TestCase):
    def test_traits(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            class Params:
                even = factory.Trait(two=True, four=True)
                odd = factory.Trait(one=True, three=True, five=True)

        obj1 = TestObjectFactory()
        self.assertEqual(
            obj1.as_dict(),
            dict(one=None, two=None, three=None, four=None, five=None),
        )

        obj2 = TestObjectFactory(even=True)
        self.assertEqual(
            obj2.as_dict(),
            dict(one=None, two=True, three=None, four=True, five=None),
        )

        obj3 = TestObjectFactory(odd=True)
        self.assertEqual(
            obj3.as_dict(),
            dict(one=True, two=None, three=True, four=None, five=True),
        )

        obj4 = TestObjectFactory(even=True, odd=True)
        self.assertEqual(
            obj4.as_dict(),
            dict(one=True, two=True, three=True, four=True, five=True),
        )

        obj5 = TestObjectFactory(odd=True, two=True)
        self.assertEqual(
            obj5.as_dict(),
            dict(one=True, two=True, three=True, four=None, five=True),
        )

    def test_post_generation_traits(self):
        @factory.post_generation
        def compute(obj, _create, _value, power=2, **kwargs):
            obj.value = obj.value ** power

        class DummyFactory(factory.Factory):
            class Meta:
                model = Dummy

            value = 3

            class Params:
                exponentiate = factory.Trait(apply_exponent=compute)

        base = DummyFactory.build()
        self.assertEqual(dict(value=3), base.as_dict)

        exp = DummyFactory.build(exponentiate=True)
        self.assertEqual(dict(value=9), exp.as_dict)

        higher = DummyFactory.build(exponentiate=True, apply_exponent__power=4)
        self.assertEqual(dict(value=81), higher.as_dict)

    def test_traits_inheritance(self):
        """A trait can be set in an inherited class."""
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            class Params:
                even = factory.Trait(two=True, four=True)
                odd = factory.Trait(one=True, three=True, five=True)

        class EvenObjectFactory(TestObjectFactory):
            even = True

        # Simple call
        obj1 = EvenObjectFactory()
        self.assertEqual(
            obj1.as_dict(),
            dict(one=None, two=True, three=None, four=True, five=None),
        )

        # Force-disable it
        obj2 = EvenObjectFactory(even=False)
        self.assertEqual(
            obj2.as_dict(),
            dict(one=None, two=None, three=None, four=None, five=None),
        )

    def test_traits_override_params(self):
        """Override a Params value in a trait"""
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = factory.LazyAttribute(lambda o: o.zero + 1)

            class Params:
                zero = 0
                plus_one = factory.Trait(zero=1)

        obj = TestObjectFactory(plus_one=True)
        self.assertEqual(obj.one, 2)

    def test_traits_override(self):
        """Override a trait in a subclass."""
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            class Params:
                even = factory.Trait(two=True, four=True)
                odd = factory.Trait(one=True, three=True, five=True)

        class WeirdMathFactory(TestObjectFactory):
            class Params:
                # Here, one is even.
                even = factory.Trait(two=True, four=True, one=True)

        obj = WeirdMathFactory(even=True)
        self.assertEqual(
            obj.as_dict(),
            dict(one=True, two=True, three=None, four=True, five=None),
        )

    def test_traits_chaining(self):
        """Use a trait to enable other traits."""
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            class Params:
                even = factory.Trait(two=True, four=True)
                odd = factory.Trait(one=True, three=True, five=True)
                full = factory.Trait(even=True, odd=True)
                override = factory.Trait(even=True, two=False)

        # Setting "full" should enable all fields.
        obj = TestObjectFactory(full=True)
        self.assertEqual(
            obj.as_dict(),
            dict(one=True, two=True, three=True, four=True, five=True),
        )

        # Does it break usual patterns?
        obj1 = TestObjectFactory()
        self.assertEqual(
            obj1.as_dict(),
            dict(one=None, two=None, three=None, four=None, five=None),
        )

        obj2 = TestObjectFactory(even=True)
        self.assertEqual(
            obj2.as_dict(),
            dict(one=None, two=True, three=None, four=True, five=None),
        )

        obj3 = TestObjectFactory(odd=True)
        self.assertEqual(
            obj3.as_dict(),
            dict(one=True, two=None, three=True, four=None, five=True),
        )

        # Setting override should override two and set it to False
        obj = TestObjectFactory(override=True)
        self.assertEqual(
            obj.as_dict(),
            dict(one=None, two=False, three=None, four=True, five=None),
        )

    def test_prevent_cyclic_traits(self):

        with self.assertRaises(errors.CyclicDefinitionError):
            class TestObjectFactory(factory.Factory):
                class Meta:
                    model = TestObject

                class Params:
                    a = factory.Trait(b=True, one=True)
                    b = factory.Trait(a=True, two=True)

    def test_deep_traits(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

        class WrapperFactory(factory.Factory):
            class Meta:
                model = TestObject

            class Params:
                deep_one = factory.Trait(
                    one=1,
                    two__one=2,
                )

            two = factory.SubFactory(TestObjectFactory)

        wrapper = WrapperFactory(deep_one=True)
        self.assertEqual(1, wrapper.one)
        self.assertEqual(2, wrapper.two.one)

    def test_traits_and_postgeneration(self):
        """A trait parameter should be resolved before post_generation hooks.

        See https://github.com/FactoryBoy/factory_boy/issues/466.
        """
        PRICES = {}

        Pizza = collections.namedtuple('Pizza', ['style', 'toppings'])

        class PizzaFactory(factory.Factory):
            class Meta:
                model = Pizza

            class Params:
                fancy = factory.Trait(
                    toppings=['eggs', 'ham', 'extra_cheese'],
                    pricing__extra=10,
                )

            pricing__extra = 0
            toppings = ['tomato', 'cheese']
            style = 'margharita'

            @factory.post_generation
            def pricing(self, create, extracted, base_price=5, extra=0, **kwargs):
                PRICES[base_price + extra] = self

        p = PizzaFactory.build()
        self.assertEqual({5: p}, PRICES)


class SubFactoryTestCase(unittest.TestCase):
    def test_sub_factory(self):
        class TestModel2(FakeModel):
            pass

        class TestModelFactory(FakeModelFactory):
            class Meta:
                model = TestModel
            one = 3

        class TestModel2Factory(FakeModelFactory):
            class Meta:
                model = TestModel2
            two = factory.SubFactory(TestModelFactory, one=1)

        test_model = TestModel2Factory(two__one=4)
        self.assertEqual(4, test_model.two.one)
        self.assertEqual(1, test_model.id)
        self.assertEqual(1, test_model.two.id)

    def test_sub_factory_with_lazy_fields(self):
        class TestModel2(FakeModel):
            pass

        class TestModelFactory(FakeModelFactory):
            class Meta:
                model = TestModel

        class TestModel2Factory(FakeModelFactory):
            class Meta:
                model = TestModel2
            two = factory.SubFactory(
                TestModelFactory,
                one=factory.Sequence(lambda n: 'x%dx' % n),
                two=factory.LazyAttribute(lambda o: f'{o.one}{o.one}'),
            )

        test_model = TestModel2Factory(one=42)
        self.assertEqual('x0x', test_model.two.one)
        self.assertEqual('x0xx0x', test_model.two.two)

    def test_sub_factory_with_lazy_fields_access_factory_parent(self):
        class TestModel2(FakeModel):
            pass

        class TestModelFactory(FakeModelFactory):
            class Meta:
                model = TestModel
            one = 3

        class TestModel2Factory(FakeModelFactory):
            class Meta:
                model = TestModel2
            one = 'parent'
            child = factory.SubFactory(
                TestModelFactory,
                one=factory.LazyAttribute(lambda o: '%s child' % o.factory_parent.one),
            )

        test_model = TestModel2Factory()
        self.assertEqual('parent child', test_model.child.one)

    def test_sub_factory_and_sequence(self):
        class TestObject:
            def __init__(self, **kwargs):
                for k, v in kwargs.items():
                    setattr(self, k, v)

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = factory.Sequence(lambda n: int(n))

        class WrappingTestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            wrapped = factory.SubFactory(TestObjectFactory)

        wrapping = WrappingTestObjectFactory.build()
        self.assertEqual(0, wrapping.wrapped.one)
        wrapping = WrappingTestObjectFactory.build()
        self.assertEqual(1, wrapping.wrapped.one)

    def test_sub_factory_overriding(self):
        class TestObject:
            def __init__(self, **kwargs):
                for k, v in kwargs.items():
                    setattr(self, k, v)

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

        class OtherTestObject:
            def __init__(self, **kwargs):
                for k, v in kwargs.items():
                    setattr(self, k, v)

        class WrappingTestObjectFactory(factory.Factory):
            class Meta:
                model = OtherTestObject

            wrapped = factory.SubFactory(TestObjectFactory, two=2, four=4)
            wrapped__two = 4
            wrapped__three = 3

        wrapping = WrappingTestObjectFactory.build()
        self.assertEqual(wrapping.wrapped.two, 4)
        self.assertEqual(wrapping.wrapped.three, 3)
        self.assertEqual(wrapping.wrapped.four, 4)

    def test_sub_factory_deep_overrides(self):
        Author = collections.namedtuple('Author', ['name', 'country'])
        Book = collections.namedtuple('Book', ['title', 'author'])
        Chapter = collections.namedtuple('Chapter', ['book', 'number'])

        class AuthorFactory(factory.Factory):
            class Meta:
                model = Author
            name = "John"
            country = 'XX'

        class BookFactory(factory.Factory):
            class Meta:
                model = Book
            title = "The mighty adventures of nobody."
            author = factory.SubFactory(AuthorFactory)

        class ChapterFactory(factory.Factory):
            class Meta:
                model = Chapter
            book = factory.SubFactory(BookFactory)
            number = factory.Sequence(lambda n: n)
            book__author__country = factory.LazyAttribute(lambda o: 'FR')

        chapter = ChapterFactory()
        self.assertEqual('FR', chapter.book.author.country)

    def test_nested_sub_factory(self):
        """Test nested sub-factories."""

        class TestObject:
            def __init__(self, **kwargs):
                for k, v in kwargs.items():
                    setattr(self, k, v)

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

        class WrappingTestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            wrapped = factory.SubFactory(TestObjectFactory)
            wrapped_bis = factory.SubFactory(TestObjectFactory, one=1)

        class OuterWrappingTestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            wrap = factory.SubFactory(WrappingTestObjectFactory, wrapped__two=2)

        outer = OuterWrappingTestObjectFactory.build()
        self.assertEqual(outer.wrap.wrapped.two, 2)
        self.assertEqual(outer.wrap.wrapped_bis.one, 1)

    def test_nested_sub_factory_with_overridden_sub_factories(self):
        """Test nested sub-factories, with attributes overridden with subfactories."""

        class TestObject:
            def __init__(self, **kwargs):
                for k, v in kwargs.items():
                    setattr(self, k, v)

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            two = 'two'

        class WrappingTestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            wrapped = factory.SubFactory(TestObjectFactory)
            friend = factory.LazyAttribute(lambda o: o.wrapped.two.four + 1)

        class OuterWrappingTestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            wrap = factory.SubFactory(
                WrappingTestObjectFactory,
                wrapped__two=factory.SubFactory(TestObjectFactory, four=4),
            )

        outer = OuterWrappingTestObjectFactory.build()
        self.assertEqual(outer.wrap.wrapped.two.four, 4)
        self.assertEqual(outer.wrap.friend, 5)

    def test_nested_subfactory_with_override(self):
        """Tests replacing a SubFactory field with an actual value."""

        # The test class
        class TestObject:
            def __init__(self, two='one', wrapped=None):
                self.two = two
                self.wrapped = wrapped

        # Innermost factory
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            two = 'two'

        # Intermediary factory
        class WrappingTestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            wrapped = factory.SubFactory(TestObjectFactory)
            wrapped__two = 'three'

        obj = TestObject(two='four')
        outer = WrappingTestObjectFactory(wrapped=obj)
        self.assertEqual(obj, outer.wrapped)
        self.assertEqual('four', outer.wrapped.two)

    def test_deep_nested_subfactory(self):
        counter = iter(range(100))

        class Node:
            def __init__(self, label, child=None):
                self.id = next(counter)
                self.label = label
                self.child = child

        class LeafFactory(factory.Factory):
            class Meta:
                model = Node
            label = 'leaf'

        class BranchFactory(factory.Factory):
            class Meta:
                model = Node
            label = 'branch'
            child = factory.SubFactory(LeafFactory)

        class TreeFactory(factory.Factory):
            class Meta:
                model = Node
            label = 'tree'
            child = factory.SubFactory(BranchFactory)
            child__child__label = 'magic-leaf'

        leaf = LeafFactory()
        # Magic corruption did happen here once:
        # forcing child__child=X while another part already set another value
        # on child__child__label meant that the value passed for child__child
        # was merged into the factory's inner declaration dict.
        mtree_1 = TreeFactory(child__child=leaf)
        mtree_2 = TreeFactory()

        self.assertEqual(0, mtree_1.child.child.id)
        self.assertEqual('leaf', mtree_1.child.child.label)
        self.assertEqual(1, mtree_1.child.id)
        self.assertEqual('branch', mtree_1.child.label)
        self.assertEqual(2, mtree_1.id)
        self.assertEqual('tree', mtree_1.label)
        self.assertEqual(3, mtree_2.child.child.id)
        self.assertEqual('magic-leaf', mtree_2.child.child.label)
        self.assertEqual(4, mtree_2.child.id)
        self.assertEqual('branch', mtree_2.child.label)
        self.assertEqual(5, mtree_2.id)
        self.assertEqual('tree', mtree_2.label)

    def test_sub_factory_and_inheritance(self):
        """Test inheriting from a factory with subfactories, overriding."""
        class TestObject:
            def __init__(self, **kwargs):
                for k, v in kwargs.items():
                    setattr(self, k, v)

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            two = 'two'

        class WrappingTestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            wrapped = factory.SubFactory(TestObjectFactory)
            friend = factory.LazyAttribute(lambda o: o.wrapped.two + 1)

        class ExtendedWrappingTestObjectFactory(WrappingTestObjectFactory):
            wrapped__two = 4

        wrapping = ExtendedWrappingTestObjectFactory.build()
        self.assertEqual(wrapping.wrapped.two, 4)
        self.assertEqual(wrapping.friend, 5)

    def test_diamond_sub_factory(self):
        """Tests the case where an object has two fields with a common field."""
        class InnerMost:
            def __init__(self, a, b):
                self.a = a
                self.b = b

        class SideA:
            def __init__(self, inner_from_a):
                self.inner_from_a = inner_from_a

        class SideB:
            def __init__(self, inner_from_b):
                self.inner_from_b = inner_from_b

        class OuterMost:
            def __init__(self, foo, side_a, side_b):
                self.foo = foo
                self.side_a = side_a
                self.side_b = side_b

        class InnerMostFactory(factory.Factory):
            class Meta:
                model = InnerMost
            a = 15
            b = 20

        class SideAFactory(factory.Factory):
            class Meta:
                model = SideA
            inner_from_a = factory.SubFactory(InnerMostFactory, a=20)

        class SideBFactory(factory.Factory):
            class Meta:
                model = SideB
            inner_from_b = factory.SubFactory(InnerMostFactory, b=15)

        class OuterMostFactory(factory.Factory):
            class Meta:
                model = OuterMost

            foo = 30
            side_a = factory.SubFactory(
                SideAFactory,
                inner_from_a__a=factory.ContainerAttribute(
                    lambda obj, containers: containers[1].foo * 2,
                )
            )
            side_b = factory.SubFactory(
                SideBFactory,
                inner_from_b=factory.ContainerAttribute(
                    lambda obj, containers: containers[0].side_a.inner_from_a,
                )
            )

        outer = OuterMostFactory.build()
        self.assertEqual(outer.foo, 30)
        self.assertEqual(outer.side_a.inner_from_a, outer.side_b.inner_from_b)
        self.assertEqual(outer.side_a.inner_from_a.a, outer.foo * 2)
        self.assertEqual(outer.side_a.inner_from_a.b, 20)

        outer = OuterMostFactory.build(side_a__inner_from_a__b=4)
        self.assertEqual(outer.foo, 30)
        self.assertEqual(outer.side_a.inner_from_a, outer.side_b.inner_from_b)
        self.assertEqual(outer.side_a.inner_from_a.a, outer.foo * 2)
        self.assertEqual(outer.side_a.inner_from_a.b, 4)

    def test_nonstrict_container_attribute(self):
        class TestModel2(FakeModel):
            pass

        class TestModelFactory(FakeModelFactory):
            class Meta:
                model = TestModel
            one = 3
            two = factory.ContainerAttribute(lambda obj, containers: len(containers or []), strict=False)

        class TestModel2Factory(FakeModelFactory):
            class Meta:
                model = TestModel2
            one = 1
            two = factory.SubFactory(TestModelFactory, one=1)

        obj = TestModel2Factory.build()
        self.assertEqual(1, obj.one)
        self.assertEqual(1, obj.two.one)
        self.assertEqual(1, obj.two.two)

        obj = TestModelFactory()
        self.assertEqual(3, obj.one)
        self.assertEqual(0, obj.two)

    def test_strict_container_attribute(self):
        class TestModel2(FakeModel):
            pass

        class TestModelFactory(FakeModelFactory):
            class Meta:
                model = TestModel
            sample_int = 3
            container_len = factory.ContainerAttribute(lambda obj, containers: len(containers or []), strict=True)

        class TestModel2Factory(FakeModelFactory):
            class Meta:
                model = TestModel2
            sample_int = 1
            descendant = factory.SubFactory(TestModelFactory, sample_int=1)

        obj = TestModel2Factory.build()
        self.assertEqual(1, obj.sample_int)
        self.assertEqual(1, obj.descendant.sample_int)
        self.assertEqual(1, obj.descendant.container_len)

        with self.assertRaises(TypeError):
            TestModelFactory.build()

    def test_function_container_attribute(self):
        class TestModel2(FakeModel):
            pass

        class TestModelFactory(FakeModelFactory):
            class Meta:
                model = TestModel
            sample_int = 3

            @factory.container_attribute
            def container_len(self, containers):
                if containers:
                    return len(containers)
                return 42

        class TestModel2Factory(FakeModelFactory):
            class Meta:
                model = TestModel2
            sample_int = 1
            descendant = factory.SubFactory(TestModelFactory, sample_int=1)

        obj = TestModel2Factory.build()
        self.assertEqual(1, obj.sample_int)
        self.assertEqual(1, obj.descendant.sample_int)
        self.assertEqual(1, obj.descendant.container_len)

        obj = TestModelFactory()
        self.assertEqual(3, obj.sample_int)
        self.assertEqual(42, obj.container_len)


class IteratorTestCase(unittest.TestCase):

    def test_iterator(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = factory.Iterator(range(10, 30))

        objs = TestObjectFactory.build_batch(20)

        for i, obj in enumerate(objs):
            self.assertEqual(i + 10, obj.one)

    @utils.disable_warnings
    def test_iterator_list_comprehension_protected(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = factory.Iterator([_j * 3 for _j in range(5)])

        # Scope bleeding : _j will end up in TestObjectFactory's scope.
        # But factory_boy ignores it, as a protected variable.
        objs = TestObjectFactory.build_batch(20)

        for i, obj in enumerate(objs):
            self.assertEqual(3 * (i % 5), obj.one)

    def test_iterator_decorator(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            @factory.iterator
            def one():
                yield from range(10, 50)

        objs = TestObjectFactory.build_batch(20)

        for i, obj in enumerate(objs):
            self.assertEqual(i + 10, obj.one)

    def test_iterator_late_loading(self):
        """Ensure that Iterator doesn't unroll on class creation.

        This allows, for Django objects, to call:
        foo = factory.Iterator(models.MyThingy.objects.all())
        """
        class DBRequest:
            def __init__(self):
                self.ready = False

            def __iter__(self):
                if not self.ready:
                    raise ValueError("Not ready!!")
                return iter([1, 2, 3])

        # calling __iter__() should crash
        req1 = DBRequest()
        with self.assertRaises(ValueError):
            iter(req1)

        req2 = DBRequest()

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = factory.Iterator(req2)

        req2.ready = True
        obj = TestObjectFactory()
        self.assertEqual(1, obj.one)

    def test_iterator_time_manipulation(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            @factory.iterator
            def one():
                now = datetime.datetime.now()
                yield now + datetime.timedelta(hours=1)
                yield now + datetime.timedelta(hours=2)

        obj1, obj2, obj3 = TestObjectFactory.create_batch(3)
        # Timers should be t+1H, t+2H, t+1H, t+2H, etc.
        self.assertEqual(datetime.timedelta(hours=1), obj2.one - obj1.one)
        self.assertEqual(obj1.one, obj3.one)


class BetterFakeModelManager:
    def __init__(self, keys, instance):
        self.keys = keys
        self.instance = instance

    def get_or_create(self, **kwargs):
        defaults = kwargs.pop('defaults', {})
        if kwargs == self.keys:
            return self.instance, False
        kwargs.update(defaults)
        instance = FakeModel.create(**kwargs)
        instance.id = 2
        return instance, True

    def using(self, db):
        return self


class BetterFakeModel:
    @classmethod
    def create(cls, **kwargs):
        instance = cls(**kwargs)
        instance.id = 1
        return instance

    def __init__(self, **kwargs):
        for name, value in kwargs.items():
            setattr(self, name, value)
            self.id = None


@unittest.skipIf(SKIP_DJANGO, "django tests disabled.")
class DjangoModelFactoryTestCase(unittest.TestCase):
    def test_simple(self):
        class FakeModelFactory(factory.django.DjangoModelFactory):
            class Meta:
                model = FakeModel

        obj = FakeModelFactory(one=1)
        self.assertEqual(1, obj.one)
        self.assertEqual(2, obj.id)

    def test_existing_instance(self):
        prev = BetterFakeModel.create(x=1, y=2, z=3)
        prev.id = 42

        class MyFakeModel(BetterFakeModel):
            objects = BetterFakeModelManager({'x': 1}, prev)

        class MyFakeModelFactory(factory.django.DjangoModelFactory):
            class Meta:
                model = MyFakeModel
                django_get_or_create = ('x',)
            x = 1
            y = 4
            z = 6

        obj = MyFakeModelFactory()
        self.assertEqual(prev, obj)
        self.assertEqual(1, obj.x)
        self.assertEqual(2, obj.y)
        self.assertEqual(3, obj.z)
        self.assertEqual(42, obj.id)

    def test_existing_instance_complex_key(self):
        prev = BetterFakeModel.create(x=1, y=2, z=3)
        prev.id = 42

        class MyFakeModel(BetterFakeModel):
            objects = BetterFakeModelManager({'x': 1, 'y': 2, 'z': 3}, prev)

        class MyFakeModelFactory(factory.django.DjangoModelFactory):
            class Meta:
                model = MyFakeModel
                django_get_or_create = ('x', 'y', 'z')
            x = 1
            y = 4
            z = 6

        obj = MyFakeModelFactory(y=2, z=3)
        self.assertEqual(prev, obj)
        self.assertEqual(1, obj.x)
        self.assertEqual(2, obj.y)
        self.assertEqual(3, obj.z)
        self.assertEqual(42, obj.id)

    def test_new_instance(self):
        prev = BetterFakeModel.create(x=1, y=2, z=3)
        prev.id = 42

        class MyFakeModel(BetterFakeModel):
            objects = BetterFakeModelManager({'x': 1}, prev)

        class MyFakeModelFactory(factory.django.DjangoModelFactory):
            class Meta:
                model = MyFakeModel
                django_get_or_create = ('x',)
            x = 1
            y = 4
            z = 6

        obj = MyFakeModelFactory(x=2)
        self.assertNotEqual(prev, obj)
        self.assertEqual(2, obj.x)
        self.assertEqual(4, obj.y)
        self.assertEqual(6, obj.z)
        self.assertEqual(2, obj.id)

    def test_new_instance_complex_key(self):
        prev = BetterFakeModel.create(x=1, y=2, z=3)
        prev.id = 42

        class MyFakeModel(BetterFakeModel):
            objects = BetterFakeModelManager({'x': 1, 'y': 2, 'z': 3}, prev)

        class MyFakeModelFactory(factory.django.DjangoModelFactory):
            class Meta:
                model = MyFakeModel
                django_get_or_create = ('x', 'y', 'z')
            x = 1
            y = 4
            z = 6

        obj = MyFakeModelFactory(y=2, z=4)
        self.assertNotEqual(prev, obj)
        self.assertEqual(1, obj.x)
        self.assertEqual(2, obj.y)
        self.assertEqual(4, obj.z)
        self.assertEqual(2, obj.id)

    def test_sequence(self):
        class TestModelFactory(factory.django.DjangoModelFactory):
            class Meta:
                model = TestModel

            a = factory.Sequence(lambda n: 'foo_%s' % n)

        o1 = TestModelFactory()
        o2 = TestModelFactory()

        self.assertEqual('foo_0', o1.a)
        self.assertEqual('foo_1', o2.a)

        o3 = TestModelFactory.build()
        o4 = TestModelFactory.build()

        self.assertEqual('foo_2', o3.a)
        self.assertEqual('foo_3', o4.a)

    def test_no_get_or_create(self):
        class TestModelFactory(factory.django.DjangoModelFactory):
            class Meta:
                model = TestModel

            a = factory.Sequence(lambda n: 'foo_%s' % n)

        o = TestModelFactory()
        self.assertEqual(None, o._defaults)
        self.assertEqual('foo_0', o.a)
        self.assertEqual(2, o.id)

    def test_get_or_create(self):
        class TestModelFactory(factory.django.DjangoModelFactory):
            class Meta:
                model = TestModel
                django_get_or_create = ('a', 'b')

            a = factory.Sequence(lambda n: 'foo_%s' % n)
            b = 2
            c = 3
            d = 4

        o = TestModelFactory()
        self.assertEqual({'c': 3, 'd': 4}, o._defaults)
        self.assertEqual('foo_0', o.a)
        self.assertEqual(2, o.b)
        self.assertEqual(3, o.c)
        self.assertEqual(4, o.d)
        self.assertEqual(2, o.id)

    def test_full_get_or_create(self):
        """Test a DjangoModelFactory with all fields in get_or_create."""
        class TestModelFactory(factory.django.DjangoModelFactory):
            class Meta:
                model = TestModel
                django_get_or_create = ('a', 'b', 'c', 'd')

            a = factory.Sequence(lambda n: 'foo_%s' % n)
            b = 2
            c = 3
            d = 4

        o = TestModelFactory()
        self.assertEqual({}, o._defaults)
        self.assertEqual('foo_0', o.a)
        self.assertEqual(2, o.b)
        self.assertEqual(3, o.c)
        self.assertEqual(4, o.d)
        self.assertEqual(2, o.id)


class PostGenerationTestCase(unittest.TestCase):
    def test_post_generation(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = 1

            @factory.post_generation
            def incr_one(self, _create, _increment):
                self.one += 1

        obj = TestObjectFactory.build()
        self.assertEqual(2, obj.one)
        self.assertFalse(hasattr(obj, 'incr_one'))

        obj = TestObjectFactory.build(one=2)
        self.assertEqual(3, obj.one)
        self.assertFalse(hasattr(obj, 'incr_one'))

    def test_post_generation_hook(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = 1

            @factory.post_generation
            def incr_one(self, _create, _increment):
                self.one += 1
                return 42

            @classmethod
            def _after_postgeneration(cls, obj, create, results):
                obj.create = create
                obj.results = results

        obj = TestObjectFactory.build()
        self.assertEqual(2, obj.one)
        self.assertFalse(obj.create)
        self.assertEqual({'incr_one': 42}, obj.results)

    def test_post_generation_extraction(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = 1

            @factory.post_generation
            def incr_one(self, _create, increment=1):
                self.one += increment

        obj = TestObjectFactory.build(incr_one=2)
        self.assertEqual(3, obj.one)
        self.assertFalse(hasattr(obj, 'incr_one'))

        obj = TestObjectFactory.build(one=2, incr_one=2)
        self.assertEqual(4, obj.one)
        self.assertFalse(hasattr(obj, 'incr_one'))

    def test_post_generation_extraction_lambda(self):

        def my_lambda(obj, create, extracted, **kwargs):
            self.assertTrue(isinstance(obj, TestObject))
            self.assertFalse(create)
            self.assertEqual(extracted, 42)
            self.assertEqual(kwargs, {'foo': 13})

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            bar = factory.PostGeneration(my_lambda)

        TestObjectFactory.build(bar=42, bar__foo=13)

    def test_post_generation_override_with_extra(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = 1

            @factory.post_generation
            def incr_one(self, _create, override, **extra):
                multiplier = extra.get('multiplier', 1)
                if override is None:
                    override = 1
                self.one += override * multiplier

        obj = TestObjectFactory.build()
        self.assertEqual(1 + 1 * 1, obj.one)
        obj = TestObjectFactory.build(incr_one=2)
        self.assertEqual(1 + 2 * 1, obj.one)
        obj = TestObjectFactory.build(incr_one__multiplier=4)
        self.assertEqual(1 + 1 * 4, obj.one)
        obj = TestObjectFactory.build(incr_one=2, incr_one__multiplier=5)
        self.assertEqual(1 + 2 * 5, obj.one)

        # Passing extras through inherited params
        class OtherTestObjectFactory(TestObjectFactory):
            class Params:
                incr_one__multiplier = 4

        obj = OtherTestObjectFactory.build()
        self.assertEqual(1 + 1 * 4, obj.one)

    def test_post_generation_method_call(self):
        class TestObject:
            def __init__(self, one=None, two=None):
                self.one = one
                self.two = two
                self.extra = None

            def call(self, *args, **kwargs):
                self.extra = (args, kwargs)

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            one = 3
            two = 2
            post_call = factory.PostGenerationMethodCall('call', one=1)

        obj = TestObjectFactory.build()
        self.assertEqual(3, obj.one)
        self.assertEqual(2, obj.two)
        self.assertEqual(((), {'one': 1}), obj.extra)

        obj = TestObjectFactory.build(post_call__one=2, post_call__two=3)
        self.assertEqual(3, obj.one)
        self.assertEqual(2, obj.two)
        self.assertEqual(((), {'one': 2, 'two': 3}), obj.extra)

    def test_post_generation_extraction_declaration(self):
        LIBRARY = {}

        Book = collections.namedtuple('Book', ['author'])

        class BookFactory(factory.Factory):
            class Meta:
                model = Book

            author = factory.Faker('name')
            register__reference = factory.Sequence(lambda n: n)

            @factory.post_generation
            def register(self, create, extracted, reference=0, **kwargs):
                LIBRARY[reference] = self

        book = BookFactory.build()
        self.assertEqual({0: book}, LIBRARY)


class RelatedFactoryTestCase(unittest.TestCase):
    def test_related_factory(self):
        class TestRelatedObject:
            def __init__(self, obj=None, one=None, two=None):
                obj.related = self
                self.one = one
                self.two = two
                self.three = obj

        class TestRelatedObjectFactory(factory.Factory):
            class Meta:
                model = TestRelatedObject
            one = 1
            two = factory.LazyAttribute(lambda o: o.one + 1)

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            one = 3
            two = 2
            three = factory.RelatedFactory(
                TestRelatedObjectFactory,
                factory_related_name='obj',
            )

        obj = TestObjectFactory.build()
        # Normal fields
        self.assertEqual(3, obj.one)
        self.assertEqual(2, obj.two)
        # RelatedFactory was built
        self.assertIsNone(obj.three)
        self.assertIsNotNone(obj.related)
        self.assertEqual(1, obj.related.one)
        self.assertEqual(2, obj.related.two)
        # RelatedFactory was passed "parent" object
        self.assertEqual(obj, obj.related.three)

        obj = TestObjectFactory.build(three__one=3)
        # Normal fields
        self.assertEqual(3, obj.one)
        self.assertEqual(2, obj.two)
        # RelatedFactory was build
        self.assertIsNone(obj.three)
        self.assertIsNotNone(obj.related)
        # three__one was correctly parse
        self.assertEqual(3, obj.related.one)
        self.assertEqual(4, obj.related.two)
        # RelatedFactory received "parent" object
        self.assertEqual(obj, obj.related.three)

    def test_related_factory_no_name(self):
        relateds = []

        class TestRelatedObject:
            def __init__(self, obj=None, one=None, two=None):
                relateds.append(self)
                self.one = one
                self.two = two
                self.three = obj

        class TestRelatedObjectFactory(factory.Factory):
            class Meta:
                model = TestRelatedObject
            one = 1
            two = factory.LazyAttribute(lambda o: o.one + 1)

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            one = 3
            two = 2
            three = factory.RelatedFactory(TestRelatedObjectFactory)

        obj = TestObjectFactory.build()
        # Normal fields
        self.assertEqual(3, obj.one)
        self.assertEqual(2, obj.two)
        # RelatedFactory was built
        self.assertIsNone(obj.three)
        self.assertEqual(1, len(relateds))
        related = relateds[0]
        self.assertEqual(1, related.one)
        self.assertEqual(2, related.two)
        self.assertIsNone(related.three)

        obj = TestObjectFactory.build(three__one=3)
        # Normal fields
        self.assertEqual(3, obj.one)
        self.assertEqual(2, obj.two)
        # RelatedFactory was build
        self.assertIsNone(obj.three)
        self.assertEqual(2, len(relateds))

        related = relateds[1]
        self.assertEqual(3, related.one)
        self.assertEqual(4, related.two)

    def test_related_factory_selfattribute(self):
        class TestRelatedObject:
            def __init__(self, obj=None, one=None, two=None):
                obj.related = self
                self.one = one
                self.two = two
                self.three = obj

        class TestRelatedObjectFactory(factory.Factory):
            class Meta:
                model = TestRelatedObject
            one = 1
            two = factory.LazyAttribute(lambda o: o.one + 1)

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            one = 3
            two = 2
            three = factory.RelatedFactory(
                TestRelatedObjectFactory,
                factory_related_name='obj',
                two=factory.SelfAttribute('obj.two'),
            )

        obj = TestObjectFactory.build(two=4)
        self.assertEqual(3, obj.one)
        self.assertEqual(4, obj.two)
        self.assertEqual(1, obj.related.one)
        self.assertEqual(4, obj.related.two)

    def test_parameterized_related_factory(self):
        class TestRelatedObject:
            def __init__(self, obj=None, one=None, two=None):
                obj.related = self
                self.one = one
                self.two = two
                self.related = obj

        class TestRelatedObjectFactory(factory.Factory):
            class Meta:
                model = TestRelatedObject
            one = 1
            two = factory.LazyAttribute(lambda o: o.one + 1)

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            class Params:
                blah = 1

            one = 3
            two = 2
            three = factory.RelatedFactory(
                TestRelatedObjectFactory,
                factory_related_name='obj',
            )
            three__two = factory.SelfAttribute('..blah')

        obj = TestObjectFactory.build()
        self.assertEqual(3, obj.one)
        self.assertEqual(2, obj.two)
        self.assertEqual(1, obj.related.one)
        self.assertEqual(1, obj.related.two)

        obj2 = TestObjectFactory.build(blah='blah')
        self.assertEqual('blah', obj2.related.two)


class RelatedListFactoryTestCase(unittest.TestCase):
    def test_related_factory_list_of_varying_size(self):
        # Create our list of expected "related object counts"
        related_list_sizes = [5, 5, 4, 4, 3, 3, 2, 2, 1, 1]
        RELATED_LIST_SIZE = lambda: related_list_sizes.pop()

        class TestRelatedObject:
            def __init__(self, obj=None, one=None, two=None):
                # Mock out the 'List of Related Objects' generated by RelatedFactoryList
                if hasattr(obj, 'related_list'):
                    obj.related_list.append(self)
                else:
                    obj.related_list = [self]
                self.one = one
                self.two = two
                self.three = obj

        class TestRelatedObjectFactoryList(factory.Factory):
            class Meta:
                model = TestRelatedObject
            one = 1
            two = factory.LazyAttribute(lambda o: o.one + 1)

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            one = 3
            two = 2
            # RELATED_LIST_SIZE is a lambda, this allows flexibility, as opposed
            # to creating "n" related objects for every parent object...
            three = factory.RelatedFactoryList(TestRelatedObjectFactoryList,
                                               'obj',
                                               size=RELATED_LIST_SIZE)
            # Create 5 TestObjectFactories: Each with 1, 2, ... 5 related objs
        for related_list_size in reversed(related_list_sizes[1::2]):
            obj = TestObjectFactory.build()
            # Normal fields
            self.assertEqual(3, obj.one)
            self.assertEqual(2, obj.two)
            # RelatedFactory was built
            self.assertIsNone(obj.three)
            self.assertIsNotNone(obj.related_list)

            for related_obj in obj.related_list:
                self.assertEqual(1, related_obj.one)
                self.assertEqual(2, related_obj.two)
            # Each RelatedFactory in the RelatedFactoryList was passed the "parent" object
            self.assertEqual(related_list_size, len(obj.related_list))
            # obj.related is the list of TestRelatedObject(s)
            for related_obj in obj.related_list:
                self.assertEqual(obj, related_obj.three)

            obj = TestObjectFactory.build(three__one=3)
            # Normal fields
            self.assertEqual(3, obj.one)
            self.assertEqual(2, obj.two)
            # RelatedFactory was build
            self.assertIsNone(obj.three)
            self.assertIsNotNone(obj.related_list)
            # three__one was correctly parse
            for related_obj in obj.related_list:
                self.assertEqual(3, related_obj.one)
                self.assertEqual(4, related_obj.two)
            # Each RelatedFactory in RelatedFactoryList received "parent" object
            self.assertEqual(related_list_size, len(obj.related_list))
            for related_obj in obj.related_list:
                self.assertEqual(obj, related_obj.three)

    def test_related_factory_list_of_static_size(self):
        RELATED_LIST_SIZE = 4

        class TestRelatedObject:
            def __init__(self, obj=None, one=None, two=None):
                # Mock out the 'List of Related Objects' generated by RelatedFactoryList
                if hasattr(obj, 'related_list'):
                    obj.related_list.append(self)
                else:
                    obj.related_list = [self]

                self.one = one
                self.two = two
                self.three = obj

        class TestRelatedObjectFactoryList(factory.Factory):
            class Meta:
                model = TestRelatedObject
            one = 1
            two = factory.LazyAttribute(lambda o: o.one + 1)

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            one = 3
            two = 2
            three = factory.RelatedFactoryList(TestRelatedObjectFactoryList, 'obj',
                                               size=RELATED_LIST_SIZE)

        obj = TestObjectFactory.build()
        # Normal fields
        self.assertEqual(3, obj.one)
        self.assertEqual(2, obj.two)
        # RelatedFactory was built
        self.assertIsNone(obj.three)
        self.assertIsNotNone(obj.related_list)

        for related_obj in obj.related_list:
            self.assertEqual(1, related_obj.one)
            self.assertEqual(2, related_obj.two)
        # Each RelatedFactory in the RelatedFactoryList was passed the "parent" object
        self.assertEqual(RELATED_LIST_SIZE, len(obj.related_list))
        # obj.related is the list of TestRelatedObject(s)
        for related_obj in obj.related_list:
            self.assertEqual(obj, related_obj.three)

        obj = TestObjectFactory.build(three__one=3)
        # Normal fields
        self.assertEqual(3, obj.one)
        self.assertEqual(2, obj.two)
        # RelatedFactory was build
        self.assertIsNone(obj.three)
        self.assertIsNotNone(obj.related_list)
        # three__one was correctly parse
        for related_obj in obj.related_list:
            self.assertEqual(3, related_obj.one)
            self.assertEqual(4, related_obj.two)
        # Each RelatedFactory in RelatedFactoryList received "parent" object
        self.assertEqual(RELATED_LIST_SIZE, len(obj.related_list))
        for related_obj in obj.related_list:
            self.assertEqual(obj, related_obj.three)


class RelatedFactoryExtractionTestCase(unittest.TestCase):
    def setUp(self):
        self.relateds = []

        class TestRelatedObject:
            def __init__(subself, obj):
                self.relateds.append(subself)
                subself.obj = obj
                obj.related = subself

        class TestRelatedObjectFactory(factory.Factory):
            class Meta:
                model = TestRelatedObject

        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            one = factory.RelatedFactory(
                TestRelatedObjectFactory,
                factory_related_name='obj',
            )

        self.TestRelatedObject = TestRelatedObject
        self.TestRelatedObjectFactory = TestRelatedObjectFactory
        self.TestObjectFactory = TestObjectFactory

    def test_no_extraction(self):
        o = self.TestObjectFactory()
        self.assertEqual(1, len(self.relateds))
        rel = self.relateds[0]
        self.assertEqual(o, rel.obj)
        self.assertEqual(rel, o.related)

    def test_passed_value(self):
        o = self.TestObjectFactory(one=42)
        self.assertEqual([], self.relateds)
        self.assertFalse(hasattr(o, 'related'))

    def test_passed_none(self):
        o = self.TestObjectFactory(one=None)
        self.assertEqual([], self.relateds)
        self.assertFalse(hasattr(o, 'related'))


class CircularTestCase(unittest.TestCase):
    def test_example(self):
        sys.path.insert(0, os.path.abspath(os.path.dirname(__file__)))

        from .cyclic import foo
        f = foo.FooFactory.build(bar__foo=None)
        self.assertEqual(42, f.x)
        self.assertEqual(13, f.bar.y)
        self.assertIsNone(f.bar.foo)

        from .cyclic import bar
        b = bar.BarFactory.build(foo__bar__foo__bar=None)
        self.assertEqual(13, b.y)
        self.assertEqual(42, b.foo.x)
        self.assertEqual(13, b.foo.bar.y)
        self.assertEqual(42, b.foo.bar.foo.x)
        self.assertIsNone(b.foo.bar.foo.bar)


class RepeatableRandomSeedFakerTests(unittest.TestCase):
    def test_same_seed_is_used_between_fuzzy_and_faker_generators(self):
        class StudentFactory(factory.Factory):
            one = factory.fuzzy.FuzzyDecimal(4.0)
            two = factory.Faker('name')
            three = factory.Faker('name', locale='it')
            four = factory.Faker('name')

            class Meta:
                model = TestObject

        seed = 1000
        factory.random.reseed_random(seed)
        students_1 = (StudentFactory(), StudentFactory())

        factory.random.reseed_random(seed)
        students_2 = (StudentFactory(), StudentFactory())

        self.assertEqual(students_1[0].one, students_2[0].one)
        self.assertEqual(students_1[0].two, students_2[0].two)
        self.assertEqual(students_1[0].three, students_2[0].three)
        self.assertEqual(students_1[0].four, students_2[0].four)


class SelfReferentialTests(unittest.TestCase):
    def test_no_parent(self):
        from .cyclic import self_ref

        obj = self_ref.TreeElementFactory(parent__parent__parent=None)
        self.assertIsNone(obj.parent.parent.parent)

    def test_deep(self):
        from .cyclic import self_ref

        obj = self_ref.TreeElementFactory(parent__parent__parent__parent=None)
        self.assertIsNotNone(obj.parent)
        self.assertIsNotNone(obj.parent.parent)
        self.assertIsNotNone(obj.parent.parent.parent)
        self.assertIsNone(obj.parent.parent.parent.parent)


class DictTestCase(unittest.TestCase):
    def test_empty_dict(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            one = factory.Dict({})

        o = TestObjectFactory()
        self.assertEqual({}, o.one)

    def test_naive_dict(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            one = factory.Dict({'a': 1})

        o = TestObjectFactory()
        self.assertEqual({'a': 1}, o.one)

    def test_sequence_dict(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            one = factory.Dict({'a': factory.Sequence(lambda n: n + 2)})

        o1 = TestObjectFactory()
        o2 = TestObjectFactory()

        self.assertEqual({'a': 2}, o1.one)
        self.assertEqual({'a': 3}, o2.one)

    def test_dict_override(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            one = factory.Dict({'a': 1})

        o = TestObjectFactory(one__a=2)
        self.assertEqual({'a': 2}, o.one)

    def test_dict_extra_key(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            one = factory.Dict({'a': 1})

        o = TestObjectFactory(one__b=2)
        self.assertEqual({'a': 1, 'b': 2}, o.one)

    def test_dict_merged_fields(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            two = 13
            one = factory.Dict({
                'one': 1,
                'two': 2,
                'three': factory.SelfAttribute('two'),
            })

        o = TestObjectFactory(one__one=42)
        self.assertEqual({'one': 42, 'two': 2, 'three': 2}, o.one)

    def test_nested_dicts(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            one = 1
            two = factory.Dict({
                'one': 3,
                'two': factory.SelfAttribute('one'),
                'three': factory.Dict({
                    'one': 5,
                    'two': factory.SelfAttribute('..one'),
                    'three': factory.SelfAttribute('...one'),
                }),
            })

        o = TestObjectFactory()
        self.assertEqual(1, o.one)
        self.assertEqual({
            'one': 3,
            'two': 3,
            'three': {
                'one': 5,
                'two': 3,
                'three': 1,
            },
        }, o.two)


class ListTestCase(unittest.TestCase):
    def test_empty_list(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            one = factory.List([])

        o = TestObjectFactory()
        self.assertEqual([], o.one)

    def test_naive_list(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            one = factory.List([1])

        o = TestObjectFactory()
        self.assertEqual([1], o.one)

    def test_long_list(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            one = factory.List(list(range(100)))

        o = TestObjectFactory()
        self.assertEqual(list(range(100)), o.one)

    def test_sequence_list(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            one = factory.List([factory.Sequence(lambda n: n + 2)])

        o1 = TestObjectFactory()
        o2 = TestObjectFactory()

        self.assertEqual([2], o1.one)
        self.assertEqual([3], o2.one)

    def test_list_override(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            one = factory.List([1])

        o = TestObjectFactory(one__0=2)
        self.assertEqual([2], o.one)

    def test_list_extra_key(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            one = factory.List([1])

        o = TestObjectFactory(one__1=2)
        self.assertEqual([1, 2], o.one)

    def test_list_merged_fields(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject
            two = 13
            one = factory.List([
                1,
                2,
                factory.SelfAttribute('1'),
            ])

        o = TestObjectFactory(one__0=42)
        self.assertEqual([42, 2, 2], o.one)

    def test_nested_lists(self):
        class TestObjectFactory(factory.Factory):
            class Meta:
                model = TestObject

            one = 1
            two = factory.List([
                3,
                factory.SelfAttribute('0'),
                factory.List([
                    5,
                    factory.SelfAttribute('..0'),
                    factory.SelfAttribute('...one'),
                ]),
            ])

        o = TestObjectFactory()
        self.assertEqual(1, o.one)
        self.assertEqual([
            3,
            3,
            [
                5,
                3,
                1,
            ],
        ], o.two)