From 8563a98022b8b3e855bf036a57aad4fd86319eff Mon Sep 17 00:00:00 2001
From: Raphaël Barrois <raphael.barrois@polytechnique.org>
Date: Fri, 6 Jan 2012 23:39:33 +0100
Subject: Add factory.build(), factory.create(), factory.stub() methods.
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Those are shortcuts for writing a full Factory class.

Signed-off-by: Raphaël Barrois <raphael.barrois@polytechnique.org>
---
 factory/__init__.py |  4 ++++
 factory/base.py     | 42 +++++++++++++++++++++++++++++++-----------
 tests/test_base.py  | 21 +++++++++++++++++++++
 3 files changed, 56 insertions(+), 11 deletions(-)

diff --git a/factory/__init__.py b/factory/__init__.py
index efc0001..f2652f2 100644
--- a/factory/__init__.py
+++ b/factory/__init__.py
@@ -28,6 +28,10 @@ from base import (
     StubFactory,
     DjangoModelFactory,
 
+    build,
+    create,
+    stub,
+
     BUILD_STRATEGY,
     CREATE_STRATEGY,
     STUB_STRATEGY,
diff --git a/factory/base.py b/factory/base.py
index 3f3261b..80c49ca 100644
--- a/factory/base.py
+++ b/factory/base.py
@@ -156,17 +156,18 @@ class FactoryMetaClass(BaseFactoryMetaClass):
         if FACTORY_CLASS_DECLARATION in attrs:
             return attrs[FACTORY_CLASS_DECLARATION]
 
-        factory_module = sys.modules[attrs['__module__']]
-        if class_name.endswith('Factory'):
-            # Try a module lookup
-            used_auto_discovery = True
-            associated_class_name = class_name[:-len('Factory')]
-            if associated_class_name:
-                # Class name was longer than just 'Factory'.
-                try:
-                    return getattr(factory_module, associated_class_name)
-                except AttributeError:
-                    pass
+        if '__module__' in attrs:
+            factory_module = sys.modules[attrs['__module__']]
+            if class_name.endswith('Factory'):
+                # Try a module lookup
+                used_auto_discovery = True
+                associated_class_name = class_name[:-len('Factory')]
+                if associated_class_name:
+                    # Class name was longer than just 'Factory'.
+                    try:
+                        return getattr(factory_module, associated_class_name)
+                    except AttributeError:
+                        pass
 
         # Unable to guess a good option; return the inherited class.
         if inherited is not None:
@@ -439,3 +440,22 @@ class DjangoModelFactory(Factory):
                 ).order_by('-id')[0]
         except IndexError:
             return 1
+
+
+def _make_factory(klass, **kwargs):
+    factory_name = '%sFactory' % klass.__name__
+    kwargs[FACTORY_CLASS_DECLARATION] = klass
+    factory_class = type(Factory).__new__(type(Factory), factory_name, (Factory,), kwargs)
+    factory_class.__name__ = '%sFactory' % klass.__name__
+    factory_class.__doc__ = 'Auto-generated factory for class %s' % klass
+    return factory_class
+
+
+def build(klass, **kwargs):
+    return _make_factory(klass, **kwargs).build()
+
+def create(klass, **kwargs):
+    return _make_factory(klass, **kwargs).create()
+
+def stub(klass, **kwargs):
+    return _make_factory(klass, **kwargs).stub()
diff --git a/tests/test_base.py b/tests/test_base.py
index 01855c3..5855682 100644
--- a/tests/test_base.py
+++ b/tests/test_base.py
@@ -55,6 +55,27 @@ class SafetyTestCase(unittest.TestCase):
         self.assertRaises(RuntimeError, base.BaseFactory)
 
 
+class SimpleBuildTestCase(unittest.TestCase):
+    """Tests the minimalist 'factory.build/create' functions."""
+
+    def test_build(self):
+        obj = base.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_create(self):
+        obj = base.create(FakeDjangoModel, foo='bar')
+        self.assertEqual(obj.id, 1)
+        self.assertEqual(obj.foo, 'bar')
+
+    def test_stub(self):
+        obj = base.stub(TestObject, three=3)
+        self.assertEqual(obj.three, 3)
+        self.assertFalse(hasattr(obj, 'two'))
+
+
 class FactoryTestCase(unittest.TestCase):
     def testAttribute(self):
         class TestObjectFactory(base.Factory):
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