def test_processors(self):
# *_request / *_response methods get called appropriately
o = OpenerDirector()
meth_spec = [
[("http_request", "return request"),
("http_response", "return response")],
[("http_request", "return request"),
("http_response", "return response")],
]
handlers = add_ordered_mock_handlers(o, meth_spec)
req = Request("http://example.com/")
r = o.open(req)
# processor methods are called on *all* handlers that define them,
# not just the first handler that handles the request
calls = [(handlers[0], "http_request"), (handlers[1], "http_request"),
(handlers[0], "http_response"),
(handlers[1], "http_response")]
for i, (handler, name, args, kwds) in enumerate(o.calls):
if i < 2:
# *_request
self.assertEqual((handler, name), calls[i])
self.assertEqual(len(args), 1)
self.assertTrue(isinstance(args[0], Request))
else:
# *_response
self.assertEqual((handler, name), calls[i])
self.assertEqual(len(args), 2)
self.assertTrue(isinstance(args[0], Request))
# response from opener.open is None, because there's no
# handler that defines http_open to handle it
self.assertTrue(args[1] is None
or isinstance(args[1], MockResponse))
def test_http_error(self):
# XXX http_error_default
# http errors are a special case
o = OpenerDirector()
meth_spec = [
[("http_open", "error 302")],
[("http_error_400", "raise"), "http_open"],
[("http_error_302", "return response"), "http_error_303",
"http_error"],
[("http_error_302")],
]
handlers = add_ordered_mock_handlers(o, meth_spec)
class Unknown:
def __eq__(self, other):
return True
req = Request("http://example.com/")
r = o.open(req)
assert len(o.calls) == 2
calls = [(handlers[0], "http_open", (req, )),
(handlers[2], "http_error_302", (req, Unknown(), 302, "", {}))
]
for expected, got in zip(calls, o.calls):
handler, method_name, args = expected
self.assertEqual((handler, method_name), got[:2])
self.assertEqual(args, got[2])
def test_handled(self):
# handler returning non-None means no more handlers will be called
o = OpenerDirector()
meth_spec = [
["http_open", "ftp_open", "http_error_302"],
["ftp_open"],
[("http_open", "return self")],
[("http_open", "return self")],
]
handlers = add_ordered_mock_handlers(o, meth_spec)
req = Request("http://example.com/")
r = o.open(req)
# Second .http_open() gets called, third doesn't, since second returned
# non-None. Handlers without .http_open() never get any methods called
# on them.
# In fact, second mock handler defining .http_open() returns self
# (instead of response), which becomes the OpenerDirector's return
# value.
self.assertEqual(r, handlers[2])
calls = [(handlers[0], "http_open"), (handlers[2], "http_open")]
for expected, got in zip(calls, o.calls):
handler, name, args, kwds = got
self.assertEqual((handler, name), expected)
self.assertEqual(args, (req, ))
def test_proxy(self):
o = OpenerDirector()
ph = urllib.request.ProxyHandler(dict(http="proxy.example.com:3128"))
o.add_handler(ph)
meth_spec = [[("http_open", "return response")]]
handlers = add_ordered_mock_handlers(o, meth_spec)
req = Request("http://acme.example.com/")
self.assertEqual(req.get_host(), "acme.example.com")
r = o.open(req)
self.assertEqual(req.get_host(), "proxy.example.com:3128")
self.assertEqual([(handlers[0], "http_open")],
[tup[0:2] for tup in o.calls])
def test_handler_order(self):
o = OpenerDirector()
handlers = []
for meths, handler_order in [
([("http_open", "return self")], 500),
(["http_open"], 0),
]:
class MockHandlerSubclass(MockHandler):
pass
h = MockHandlerSubclass(meths)
h.handler_order = handler_order
handlers.append(h)
o.add_handler(h)
r = o.open("http://example.com/")
# handlers called in reverse order, thanks to their sort order
self.assertEqual(o.calls[0][0], handlers[1])
self.assertEqual(o.calls[1][0], handlers[0])