Added printing requirements

zope/interface/tests/test_exceptions.py

@@ -0,0 +1,75 @@
+##############################################################################
+#
+# Copyright (c) 2010 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.
+#
+##############################################################################
+""" zope.interface.exceptions unit tests
+"""
+import unittest
+
+def _makeIface():
+    from zope.interface import Interface
+    class IDummy(Interface):
+        pass
+    return IDummy
+
+class DoesNotImplementTests(unittest.TestCase):
+
+    def _getTargetClass(self):
+        from zope.interface.exceptions import DoesNotImplement
+        return DoesNotImplement
+
+    def _makeOne(self, iface=None):
+        if iface is None:
+            iface = _makeIface()
+        return self._getTargetClass()(iface)
+
+    def test___str__(self):
+        dni = self._makeOne()
+        # XXX The trailing newlines and blank spaces are a stupid artifact.
+        self.assertEqual(str(dni),
+            'An object does not implement interface <InterfaceClass '
+               'zope.interface.tests.test_exceptions.IDummy>\n\n        ')
+
+class BrokenImplementationTests(unittest.TestCase):
+
+    def _getTargetClass(self):
+        from zope.interface.exceptions import BrokenImplementation
+        return BrokenImplementation
+
+    def _makeOne(self, iface=None, name='missing'):
+        if iface is None:
+            iface = _makeIface()
+        return self._getTargetClass()(iface, name)
+
+    def test___str__(self):
+        dni = self._makeOne()
+        # XXX The trailing newlines and blank spaces are a stupid artifact.
+        self.assertEqual(str(dni),
+            'An object has failed to implement interface <InterfaceClass '
+               'zope.interface.tests.test_exceptions.IDummy>\n\n'
+               '        The missing attribute was not provided.\n        ')
+
+class BrokenMethodImplementationTests(unittest.TestCase):
+
+    def _getTargetClass(self):
+        from zope.interface.exceptions import BrokenMethodImplementation
+        return BrokenMethodImplementation
+
+    def _makeOne(self, method='aMethod', mess='I said so'):
+        return self._getTargetClass()(method, mess)
+
+    def test___str__(self):
+        dni = self._makeOne()
+        self.assertEqual(str(dni),
+            'The implementation of aMethod violates its contract\n'
+             '        because I said so.\n        ')
+