Fixed LP #419119: return None when the browser has no contents instea…

…d of

raising an exception.

Backport r103586

CHANGES.txt

@@ -7,6 +7,9 @@ CHANGES
 
 - Fixed Python2.7 compatibility in Browser.handleErrors.
 
+- Fixed LP #419119: return None when the browser has no contents instead of
+  raising an exception.
+
 - Fix tests on Python 2.7
 
 3.6.0a2 (2009-01-31)

src/zope/testbrowser/browser.py

@@ -198,6 +198,8 @@ def contents(self):
         if self._contents is not None:
             return self._contents
         response = self.mech_browser.response()
+        if response is None:
+            return None
         old_location = response.tell()
         response.seek(0)
         self._contents = response.read()

src/zope/testbrowser/tests.py

@@ -304,6 +304,19 @@ def test_file_upload():
 
     """
 
+def test_new_instance_no_contents_should_not_fail(self):
+    """
+
+    When first instantiated, the browser has no contents.
+    (Regression test for <http://bugs.launchpad.net/zope3/+bug/419119>)
+
+    >>> browser = Browser()
+    >>> print browser.contents
+    None
+
+    """
+
+
 
 def test_strip_linebreaks_from_textarea(self):
     """