added forced package imports

lib/zope/interface/tests/test_ro.py

@@ -0,0 +1,115 @@
+##############################################################################
+#
+# Copyright (c) 2014 Zope Foundation and Contributors.
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
+"""Resolution ordering utility tests"""
+import unittest
+
+
+class Test__mergeOrderings(unittest.TestCase):
+
+    def _callFUT(self, orderings):
+        from zope.interface.ro import _mergeOrderings
+        return _mergeOrderings(orderings)
+
+    def test_empty(self):
+        self.assertEqual(self._callFUT([]), [])
+
+    def test_single(self):
+        self.assertEqual(self._callFUT(['a', 'b', 'c']), ['a', 'b', 'c'])
+
+    def test_w_duplicates(self):
+        self.assertEqual(self._callFUT([['a'], ['b', 'a']]), ['b', 'a'])
+
+    def test_suffix_across_multiple_duplicats(self):
+        O1 = ['x', 'y', 'z']
+        O2 = ['q', 'z']
+        O3 = [1, 3, 5]
+        O4 = ['z']
+        self.assertEqual(self._callFUT([O1, O2, O3, O4]),
+                         ['x', 'y', 'q', 1, 3, 5, 'z'])
+
+
+class Test__flatten(unittest.TestCase):
+
+    def _callFUT(self, ob):
+        from zope.interface.ro import _flatten
+        return _flatten(ob)
+
+    def test_w_empty_bases(self):
+        class Foo(object):
+            pass
+        foo = Foo()
+        foo.__bases__ = ()
+        self.assertEqual(self._callFUT(foo), [foo])
+
+    def test_w_single_base(self):
+        class Foo(object):
+            pass
+        self.assertEqual(self._callFUT(Foo), [Foo, object])
+
+    def test_w_bases(self):
+        class Foo(object):
+            pass
+        class Bar(Foo):
+            pass
+        self.assertEqual(self._callFUT(Bar), [Bar, Foo, object])
+
+    def test_w_diamond(self):
+        class Foo(object):
+            pass
+        class Bar(Foo):
+            pass
+        class Baz(Foo):
+            pass
+        class Qux(Bar, Baz):
+            pass
+        self.assertEqual(self._callFUT(Qux),
+                         [Qux, Bar, Foo, object, Baz, Foo, object])
+
+
+class Test_ro(unittest.TestCase):
+
+    def _callFUT(self, ob):
+        from zope.interface.ro import ro
+        return ro(ob)
+
+    def test_w_empty_bases(self):
+        class Foo(object):
+            pass
+        foo = Foo()
+        foo.__bases__ = ()
+        self.assertEqual(self._callFUT(foo), [foo])
+
+    def test_w_single_base(self):
+        class Foo(object):
+            pass
+        self.assertEqual(self._callFUT(Foo), [Foo, object])
+
+    def test_w_bases(self):
+        class Foo(object):
+            pass
+        class Bar(Foo):
+            pass
+        self.assertEqual(self._callFUT(Bar), [Bar, Foo, object])
+
+    def test_w_diamond(self):
+        class Foo(object):
+            pass
+        class Bar(Foo):
+            pass
+        class Baz(Foo):
+            pass
+        class Qux(Bar, Baz):
+            pass
+        self.assertEqual(self._callFUT(Qux),
+                         [Qux, Bar, Baz, Foo, object])