Make sure ZCML works with a test case.

CHANGES.rst

@@ -8,6 +8,7 @@ Changes
 
 - Drop support for Python 2.6.
 
+- Fix configuring the package via its included ZCML on Python 3.
 
 2.0.0 (2014-12-24)
 --------------------

src/zope/mimetype/configure.txt

@@ -0,0 +1,19 @@
+Package configuration
+=====================
+
+The ``zope.mimetype`` package provides a ZCML file that configures some
+adapters and utilities and a couple of views:
+
+  >>> from zope.configuration.xmlconfig import XMLConfig
+  >>> import zope.mimetype
+
+  >>> len(list(zope.component.getGlobalSiteManager().registeredUtilities()))
+  0
+
+  >>> XMLConfig('configure.zcml', zope.mimetype)()
+
+  >>> len(list(zope.component.getGlobalSiteManager().registeredUtilities())) >= 760
+  True
+
+  >>> len(list(zope.component.getGlobalSiteManager().registeredAdapters()))
+  107

src/zope/mimetype/configure.zcml

@@ -2,6 +2,9 @@
     xmlns="http://namespaces.zope.org/zope"
     i18n_domain="zope.mimetype">
 
+  <include package="zope.component" file="meta.zcml" />
+  <include package="zope.mimetype" file="meta.zcml" />
+
   <mimeTypes
       module=".mtypes"
       file="types.csv"

src/zope/mimetype/tests.py

@@ -91,10 +91,15 @@ def test_suite():
                 setUp=testing.setUp, tearDown=testing.tearDown,
                 checker=checker),
         doctest.DocFileSuite(
-            'codec.txt',
-            optionflags=doctest.NORMALIZE_WHITESPACE|doctest.ELLIPSIS,
-            checker=checker,
-            ),
+                'codec.txt',
+                optionflags=doctest.NORMALIZE_WHITESPACE|doctest.ELLIPSIS,
+                checker=checker,
+        ),
+        doctest.DocFileSuite(
+                'configure.txt',
+                setUp=testing.setUp, tearDown=testing.tearDown,
+                checker=checker
+        ),
         ))
 
 if __name__ == '__main__':

src/zope/mimetype/zcml.py

@@ -55,7 +55,7 @@ def mimeTypesDirective(_context, file, module):
     directory = os.path.dirname(file)
     data = mtypes.read(file)
     provides = interfaces.IContentTypeInterface
-    for name, info in data.iteritems():
+    for name, info in data.items():
         iface = getattr(module, name, None)
         if iface is None:
             # create missing interface