Tests: added Python test with not iterable object.

test/python/close/wsgi.py

@@ -5,6 +5,7 @@ class application:
 
     def __iter__(self):
         self.start('200', [(('Content-Length', '0'))])
+        yield b''
 
     def close(self):
         self.environ['wsgi.errors'].write('Close called.')

test/python/close_error/wsgi.py

@@ -5,6 +5,7 @@ class application:
 
     def __iter__(self):
         self.start('200', [(('!', '0'))])
+        yield b''
 
     def close(self):
         self.environ['wsgi.errors'].write('Close called.')

test/python/not_iterable/wsgi.py

@@ -0,0 +1,7 @@
+class application:
+    def __init__(self, environ, start_response):
+        self.environ = environ
+        self.start = start_response
+
+    def __iter__(self):
+        self.start('200', [(('Content-Length', '0'))])

test/test_python_application.py

@@ -227,5 +227,16 @@ class TestUnitPythonApplication(unit.TestUnitApplicationPython):
         self.assertIsNotNone(self.search_in_log(r'Close called\.'),
             'close error')
 
+    def test_python_application_not_iterable(self):
+        self.load('not_iterable')
+
+        self.get(raw_resp=True)
+
+        self.stop()
+
+        self.assertIsNotNone(self.search_in_log(
+            r'\[error\].+the application returned not an iterable object'),
+            'not iterable')
+
 if __name__ == '__main__':
     unittest.main()