Added printing requirements

zope/event/__init__.py

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+##############################################################################
+#
+# Copyright (c) 2004 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.
+#
+##############################################################################
+""" Base event system implementation
+
+"""
+
+#: Applications may register for notification of events by appending a
+#: callable to the ``subscribers`` list.
+#: 
+#: Each subscriber takes a single argument, which is the event object
+#: being published.
+#:
+#: Exceptions raised by subscribers will be propagated.
+subscribers = []
+
+def notify(event):
+    """ Notify all subscribers of ``event``.
+    """
+    for subscriber in subscribers:
+        subscriber(event)

zope/event/tests.py

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+##############################################################################
+#
+# Copyright (c) 2004 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.
+#
+##############################################################################
+""" Test the event system
+"""
+import unittest
+
+class Test_notify(unittest.TestCase):
+
+    def setUp(self):
+        from zope.event import subscribers
+        self._old_subscribers = subscribers[:]
+        subscribers[:] = []
+
+    def tearDown(self):
+        from zope.event import subscribers
+        subscribers[:] = self._old_subscribers
+
+    def _callFUT(self, event):
+        from zope.event import notify
+        notify(event)
+
+    def test_empty(self):
+        event = object()
+        self._callFUT(event)
+
+    def test_not_empty(self):
+        from zope.event import subscribers
+        dummy = []
+        subscribers.append(dummy.append)
+        event = object()
+        self._callFUT(event)
+        self.assertEqual(dummy, [event])
+
+def test_suite():
+    return unittest.TestSuite((
+        unittest.makeSuite(Test_notify),
+        ))