From 70412551c545e94b27bef468cd248fce7a9cdd96 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rapha=C3=ABl=20Barrois?= <raphael.barrois@polytechnique.org>
Date: Sun, 2 Nov 2014 16:32:16 +0100
Subject: Add tests for self-referential models (See #173).

---
 tests/cyclic/self_ref.py | 37 +++++++++++++++++++++++++++++++++++++
 tests/test_using.py      | 17 +++++++++++++++++
 2 files changed, 54 insertions(+)
 create mode 100644 tests/cyclic/self_ref.py

diff --git a/tests/cyclic/self_ref.py b/tests/cyclic/self_ref.py
new file mode 100644
index 0000000..f18c989
--- /dev/null
+++ b/tests/cyclic/self_ref.py
@@ -0,0 +1,37 @@
+# -*- 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.
+
+"""Helper to test circular factory dependencies."""
+
+import factory
+
+class TreeElement(object):
+    def __init__(self, name, parent):
+        self.parent = parent
+        self.name = name
+
+
+class TreeElementFactory(factory.Factory):
+    class Meta:
+        model = TreeElement
+
+    name = factory.Sequence(lambda n: "tree%s" % n)
+    parent = factory.SubFactory('tests.cyclic.self_ref.TreeElementFactory')
diff --git a/tests/test_using.py b/tests/test_using.py
index f18df4d..8d78789 100644
--- a/tests/test_using.py
+++ b/tests/test_using.py
@@ -1938,6 +1938,23 @@ class CircularTestCase(unittest.TestCase):
         self.assertIsNone(b.foo.bar.foo.bar)
 
 
+class SelfReferentialTests(unittest.TestCase):
+    def test_no_parent(self):
+        from .cyclic import self_ref
+
+        obj = self_ref.TreeElementFactory(parent=None)
+        self.assertIsNone(obj.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):
-- 
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