Raise app exceptions without rendering response if wsgi.handleErrors …

…is False

src/ZPublisher/WSGIPublisher.py

@@ -142,6 +142,11 @@ def transaction_pubevents(request, response, tm=transaction.manager):
         # Create new exc_info with the upgraded exception.
         exc_info = (exc_type, exc, sys.exc_info()[2])
 
+        # Raise exception from app if handle-errors is False
+        # (set by zope.testbrowser in some cases)
+        if not request.environ.get('wsgi.handleErrors', True):
+            reraise(*exc_info)
+
         if isinstance(exc, Unauthorized):
             # _unauthorized modifies the response in-place. If this hook
             # is used, an exception view for Unauthorized has to merge

src/ZPublisher/tests/test_WSGIPublisher.py

@@ -517,6 +517,17 @@ def testRedirectExceptionView(self):
         headers = dict(headers)
         self.assertEqual(headers['Location'], 'http://localhost:9/')
 
+    def testHandleErrorsFalseBypassesExceptionResponse(self):
+        from AccessControl import Unauthorized
+        environ = self._makeEnviron(**{
+            'wsgi.handleErrors': False,
+        })
+        start_response = DummyCallable()
+        _publish = DummyCallable()
+        _publish._raise = Unauthorized('argg')
+        with self.assertRaises(Unauthorized):
+            self._callFUT(environ, start_response, _publish)
+
 
 class TestLoadApp(unittest.TestCase):