Support the Jinja2 finalize option

pyramid_jinja2/settings.py

@@ -149,6 +149,11 @@ def sget(name, default=None):
     # should newstyle gettext calls be enabled?
     opts['newstyle'] = asbool(sget('newstyle', False))
 
+    # Do we have a finalize function?
+    finalize = sget('finalize')
+    if finalize is not None:
+        opts['finalize'] = maybe_dotted(finalize)
+
     # add custom jinja2 filters
     opts['filters'] = parse_named_assetspecs(sget('filters', ''), maybe_dotted)
 

pyramid_jinja2/tests/test_settings.py

@@ -143,6 +143,14 @@ def test_most_settings(self):
         self.assertEqual(opts['autoescape'], False)
         self.assertEqual(opts['cache_size'], 300)
         self.assertEqual(opts['gettext'].domain, 'pyramid_jinja2')
+        self.assertFalse('finalize' in opts)
+
+    def test_finalize(self):
+        settings = {
+            'j2.finalize': 'pyramid_jinja2.tests.test_settings._fake_finalize',
+        }
+        opts = self._callFUT(settings, 'j2.')
+        self.assertTrue(opts['finalize'] is _fake_finalize)
 
     def test_strict_undefined(self):
         from jinja2 import StrictUndefined
@@ -161,3 +169,8 @@ def test_default_undefined(self):
         settings = {'j2.undefined': ''}
         opts = self._callFUT(settings, 'j2.')
         self.assertEqual(opts['undefined'], Undefined)
+
+
+# This is just a fake top level name that we can pass into maybe_dotted that
+# will resolve.
+_fake_finalize = object()