# -*- coding: utf-8 -*- # Copyright (c) 2011-2013 Raphaël Barrois # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. """Tests using factory.""" import functools import os import sys import warnings import factory from .compat import is_python2, unittest from . import tools class TestObject(object): 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 class FakeModel(object): @classmethod def create(cls, **kwargs): instance = cls(**kwargs) instance.id = 1 return instance class FakeModelManager(object): def get_or_create(self, **kwargs): kwargs.update(kwargs.pop('defaults', {})) instance = FakeModel.create(**kwargs) instance.id = 2 return instance, True def values_list(self, *args, **kwargs): return self def order_by(self, *args, **kwargs): return [1] objects = FakeModelManager() def __init__(self, **kwargs): for name, value in kwargs.items(): setattr(self, name, value) self.id = None class FakeModelFactory(factory.Factory): ABSTRACT_FACTORY = True @classmethod def _create(cls, target_class, *args, **kwargs): return target_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') def test_create_custom_base(self): obj = factory.create(FakeModel, foo='bar', FACTORY_CLASS=factory.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') def test_create_batch_custom_base(self): objs = factory.create_batch(FakeModel, 4, foo='bar', FACTORY_CLASS=factory.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') def test_generate_create_custom_base(self): obj = factory.generate(FakeModel, factory.CREATE_STRATEGY, foo='bar', FACTORY_CLASS=factory.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') def test_generate_batch_create_custom_base(self): objs = factory.generate_batch(FakeModel, factory.CREATE_STRATEGY, 20, foo='bar', FACTORY_CLASS=factory.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') def test_simple_generate_create_custom_base(self): obj = factory.simple_generate(FakeModel, True, foo='bar', FACTORY_CLASS=factory.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') def test_simple_generate_batch_create_custom_base(self): objs = factory.simple_generate_batch(FakeModel, True, 20, foo='bar', FACTORY_CLASS=factory.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) class UsingFactoryTestCase(unittest.TestCase): def test_attribute(self): class TestObjectFactory(factory.Factory): FACTORY_FOR = TestObject one = 'one' test_object = TestObjectFactory.build() self.assertEqual(test_object.one, 'one') def test_inheritance(self): @factory.use_strategy(factory.BUILD_STRATEGY) class TestObjectFactory(factory.Factory, TestObject): FACTORY_FOR = TestObject one = 'one' test_object = TestObjectFactory() self.assertEqual(test_object.one, 'one') def test_abstract(self): class SomeAbstractFactory(factory.Factory): ABSTRACT_FACTORY = True one = 'one' class InheritedFactory(SomeAbstractFactory): FACTORY_FOR = TestObject test_object = InheritedFactory.build() self.assertEqual(test_object.one, 'one') def test_sequence(self): class TestObjectFactory(factory.Factory): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = TestModel two = 2 @classmethod def _create(cls, target_class, *args, **kwargs): obj = target_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(object): def __init__(self, x, y=2): self.x = x self.y = y class NonDjangoFactory(factory.Factory): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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(object): n = 3 class TestObjectFactory(factory.Factory): FACTORY_FOR = 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): FACTORY_FOR = TestModel one = 3 three = factory.SelfAttribute('..bar') class TestModel2Factory(FakeModelFactory): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = TestObject one = 'one' two = factory.LazyAttribute(lambda a: a.one + ' two') class TestObjectFactory2(TestObjectFactory): FACTORY_FOR = 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_inheritance_with_inherited_class(self): class TestObjectFactory(factory.Factory): FACTORY_FOR = 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): FACTORY_FOR = TestObject one = 'one' class TestOtherFactory(factory.Factory): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = TestObject @staticmethod def alt_create(**kwargs): return kwargs self.assertEqual(TestObjectFactory.alt_create(foo=1), {"foo": 1}) def test_arg_parameters(self): class TestObject(object): def __init__(self, *args, **kwargs): self.args = args self.kwargs = kwargs class TestObjectFactory(factory.Factory): FACTORY_FOR = TestObject FACTORY_ARG_PARAMETERS = ('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_hidden_args(self): class TestObject(object): def __init__(self, *args, **kwargs): self.args = args self.kwargs = kwargs class TestObjectFactory(factory.Factory): FACTORY_FOR = TestObject FACTORY_HIDDEN_ARGS = ('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_hidden_args_and_arg_parameters(self): class TestObject(object): def __init__(self, *args, **kwargs): self.args = args self.kwargs = kwargs class TestObjectFactory(factory.Factory): FACTORY_FOR = TestObject FACTORY_HIDDEN_ARGS = ('x', 'z') FACTORY_ARG_PARAMETERS = ('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(object): def __init__(self, *args, **kwargs): self.args = args self.kwargs = kwargs class TestObjectFactory(factory.Factory): FACTORY_FOR = TestObject FACTORY_ARG_PARAMETERS = ('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(object): 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): FACTORY_FOR = TestObject FACTORY_ARG_PARAMETERS = ('one', 'two') one = 1 two = 2 three = 3 @classmethod def _create(cls, target_class, *args, **kwargs): return target_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(object): def __init__(self, *args, **kwargs): self.args = args self.kwargs = kwargs class TestObjectFactory(factory.Factory): FACTORY_FOR = 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) class SubFactoryTestCase(unittest.TestCase): def test_sub_factory(self): class TestModel2(FakeModel): pass class TestModelFactory(FakeModelFactory): FACTORY_FOR = TestModel one = 3 class TestModel2Factory(FakeModelFactory): FACTORY_FOR = 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): FACTORY_FOR = TestModel class TestModel2Factory(FakeModelFactory): FACTORY_FOR = TestModel2 two = factory.SubFactory(TestModelFactory, one=factory.Sequence(lambda n: 'x%dx' % n), two=factory.LazyAttribute( lambda o: '%s%s' % (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_and_sequence(self): class TestObject(object): def __init__(self, **kwargs): for k, v in kwargs.items(): setattr(self, k, v) class TestObjectFactory(factory.Factory): FACTORY_FOR = TestObject one = factory.Sequence(lambda n: int(n)) class WrappingTestObjectFactory(factory.Factory): FACTORY_FOR = 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(object): def __init__(self, **kwargs): for k, v in kwargs.items(): setattr(self, k, v) class TestObjectFactory(factory.Factory): FACTORY_FOR = TestObject class OtherTestObject(object): def __init__(self, **kwargs): for k, v in kwargs.items(): setattr(self, k, v) class WrappingTestObjectFactory(factory.Factory): FACTORY_FOR = 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_nested_sub_factory(self): """Test nested sub-factories.""" class TestObject(object): def __init__(self, **kwargs): for k, v in kwargs.items(): setattr(self, k, v) class TestObjectFactory(factory.Factory): FACTORY_FOR = TestObject class WrappingTestObjectFactory(factory.Factory): FACTORY_FOR = TestObject wrapped = factory.SubFactory(TestObjectFactory) wrapped_bis = factory.SubFactory(TestObjectFactory, one=1) class OuterWrappingTestObjectFactory(factory.Factory): FACTORY_FOR = 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(object): def __init__(self, **kwargs): for k, v in kwargs.items(): setattr(self, k, v) class TestObjectFactory(factory.Factory): FACTORY_FOR = TestObject two = 'two' class WrappingTestObjectFactory(factory.Factory): FACTORY_FOR = TestObject wrapped = factory.SubFactory(TestObjectFactory) friend = factory.LazyAttribute(lambda o: o.wrapped.two.four + 1) class OuterWrappingTestObjectFactory(factory.Factory): FACTORY_FOR = 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_sub_factory_and_inheritance(self): """Test inheriting from a factory with subfactories, overriding.""" class TestObject(object): def __init__(self, **kwargs): for k, v in kwargs.items(): setattr(self, k, v) class TestObjectFactory(factory.Factory): FACTORY_FOR = TestObject two = 'two' class WrappingTestObjectFactory(factory.Factory): FACTORY_FOR = 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(object): def __init__(self, a, b): self.a = a self.b = b class SideA(object): def __init__(self, inner_from_a): self.inner_from_a = inner_from_a class SideB(object): def __init__(self, inner_from_b): self.inner_from_b = inner_from_b class OuterMost(object): 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): FACTORY_FOR = InnerMost a = 15 b = 20 class SideAFactory(factory.Factory): FACTORY_FOR = SideA inner_from_a = factory.SubFactory(InnerMostFactory, a=20) class SideBFactory(factory.Factory): FACTORY_FOR = SideB inner_from_b = factory.SubFactory(InnerMostFactory, b=15) class OuterMostFactory(factory.Factory): FACTORY_FOR = 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): FACTORY_FOR = TestModel one = 3 two = factory.ContainerAttribute(lambda obj, containers: len(containers or []), strict=False) class TestModel2Factory(FakeModelFactory): FACTORY_FOR = 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): FACTORY_FOR = TestModel one = 3 two = factory.ContainerAttribute(lambda obj, containers: len(containers or []), strict=True) class TestModel2Factory(FakeModelFactory): FACTORY_FOR = 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) self.assertRaises(TypeError, TestModelFactory.build) def test_function_container_attribute(self): class TestModel2(FakeModel): pass class TestModelFactory(FakeModelFactory): FACTORY_FOR = TestModel one = 3 @factory.container_attribute def two(self, containers): if containers: return len(containers) return 42 class TestModel2Factory(FakeModelFactory): FACTORY_FOR = 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(42, obj.two) class IteratorTestCase(unittest.TestCase): def test_iterator(self): class TestObjectFactory(factory.Factory): FACTORY_FOR = TestObject one = factory.Iterator(range(10, 30)) objs = TestObjectFactory.build_batch(20) for i, obj in enumerate(objs): self.assertEqual(i + 10, obj.one) @unittest.skipUnless(is_python2, "Scope bleeding fixed in Python3+") @tools.disable_warnings def test_iterator_list_comprehension_scope_bleeding(self): class TestObjectFactory(factory.Factory): FACTORY_FOR = TestObject one = factory.Iterator([j * 3 for j in range(5)]) # Scope bleeding: j will end up in TestObjectFactory's scope. self.assertRaises(TypeError, TestObjectFactory.build) @tools.disable_warnings def test_iterator_list_comprehension_protected(self): class TestObjectFactory(factory.Factory): FACTORY_FOR = 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): FACTORY_FOR = TestObject @factory.iterator def one(): for i in range(10, 50): yield i objs = TestObjectFactory.build_batch(20) for i, obj in enumerate(objs): self.assertEqual(i + 10, obj.one) class BetterFakeModelManager(object): 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 values_list(self, *args, **kwargs): return self def order_by(self, *args, **kwargs): return [1] class BetterFakeModel(object): @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 class DjangoModelFactoryTestCase(unittest.TestCase): def test_simple(self): class FakeModelFactory(factory.DjangoModelFactory): FACTORY_FOR = 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.DjangoModelFactory): FACTORY_FOR = MyFakeModel FACTORY_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.DjangoModelFactory): FACTORY_FOR = MyFakeModel FACTORY_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.DjangoModelFactory): FACTORY_FOR = MyFakeModel FACTORY_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.DjangoModelFactory): FACTORY_FOR = MyFakeModel FACTORY_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) class PostGenerationTestCase(unittest.TestCase): def test_post_generation(self): class TestObjectFactory(factory.Factory): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = TestObject bar = factory.PostGeneration(my_lambda) obj = TestObjectFactory.build(bar=42, bar__foo=13) def test_post_generation_method_call(self): calls = [] class TestObject(object): 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): FACTORY_FOR = 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_related_factory(self): class TestRelatedObject(object): 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): FACTORY_FOR = TestRelatedObject one = 1 two = factory.LazyAttribute(lambda o: o.one + 1) class TestObjectFactory(factory.Factory): FACTORY_FOR = TestObject one = 3 two = 2 three = factory.RelatedFactory(TestRelatedObjectFactory, 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(object): 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): FACTORY_FOR = TestRelatedObject one = 1 two = factory.LazyAttribute(lambda o: o.one + 1) class TestObjectFactory(factory.Factory): FACTORY_FOR = 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) 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 DictTestCase(unittest.TestCase): def test_empty_dict(self): class TestObjectFactory(factory.Factory): FACTORY_FOR = TestObject one = factory.Dict({}) o = TestObjectFactory() self.assertEqual({}, o.one) def test_naive_dict(self): class TestObjectFactory(factory.Factory): FACTORY_FOR = TestObject one = factory.Dict({'a': 1}) o = TestObjectFactory() self.assertEqual({'a': 1}, o.one) def test_sequence_dict(self): class TestObjectFactory(factory.Factory): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = TestObject one = factory.List([]) o = TestObjectFactory() self.assertEqual([], o.one) def test_naive_list(self): class TestObjectFactory(factory.Factory): FACTORY_FOR = TestObject one = factory.List([1]) o = TestObjectFactory() self.assertEqual([1], o.one) def test_sequence_list(self): class TestObjectFactory(factory.Factory): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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): FACTORY_FOR = 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) class DjangoModelFactoryTestCase(unittest.TestCase): def test_sequence(self): class TestModelFactory(factory.DjangoModelFactory): FACTORY_FOR = TestModel a = factory.Sequence(lambda n: 'foo_%s' % n) o1 = TestModelFactory() o2 = TestModelFactory() self.assertEqual('foo_2', o1.a) self.assertEqual('foo_3', o2.a) o3 = TestModelFactory.build() o4 = TestModelFactory.build() self.assertEqual('foo_4', o3.a) self.assertEqual('foo_5', o4.a) if __name__ == '__main__': unittest.main()