5
我有以下測試用例。請注意,下面的測試用例不是 試圖測試任何東西,只是試圖展示我遇到的掛起問題 。爲什麼我的Python單元測試線程掛起測試用例?
import http.server
import urllib.request
import threading
import unittest
class FooTest(unittest.TestCase):
def setUp(self):
print('---- setup start')
self.httpd = http.server.HTTPServer(('', 8080), http.server.SimpleHTTPRequestHandler)
thread = threading.Thread(target=self.httpd.serve_forever)
thread.start()
print('---- setup complete')
def tearDown(self):
print('---- teardown start')
self.httpd.shutdown()
print('---- teardown complete')
def test1(self):
print('---- test1 start')
print(threading.current_thread())
urllib.request.urlopen('http://127.0.0.1:8080/foo')
print('---- test1 complete')
def test2(self):
print('---- test2 start')
print(threading.current_thread())
urllib.request.urlopen('http://127.0.0.1:8080/foo')
print('---- test2 complete')
if __name__ == '__main__':
unittest.main()
我希望在嘗試執行這個測試用例時發生2個錯誤。相反, 測試用例會在以下輸出之後掛起。
C:\lab>python foo.py -v
test1 (__main__.FooTest) ... ---- setup start
---- setup complete
---- test1 start
<_MainThread(MainThread, started 12980)>
127.0.0.1 - - [24/Mar/2014 21:53:57] code 404, message File not found
127.0.0.1 - - [24/Mar/2014 21:53:57] "GET /foo HTTP/1.1" 404 -
---- teardown start
---- teardown complete
ERROR
test2 (__main__.FooTest) ... ---- setup start
---- setup complete
---- test2 start
<_MainThread(MainThread, started 12980)>
如果我從代碼中刪除test2
,那麼我期待只有1個錯誤,並確保足夠 我看到它。
C:\lab>python foo.py -v
test1 (__main__.FooTest) ... ---- setup start
---- setup complete
---- test1 start
<_MainThread(MainThread, started 15720)>
127.0.0.1 - - [24/Mar/2014 21:55:12] code 404, message File not found
127.0.0.1 - - [24/Mar/2014 21:55:12] "GET /foo HTTP/1.1" 404 -
---- teardown start
---- teardown complete
ERROR
======================================================================
ERROR: test1 (__main__.FooTest)
----------------------------------------------------------------------
Traceback (most recent call last):
File "foo.py", line 22, in test1
urllib.request.urlopen('http://127.0.0.1:8080/foo')
File "C:\Python34\lib\urllib\request.py", line 153, in urlopen
return opener.open(url, data, timeout)
File "C:\Python34\lib\urllib\request.py", line 461, in open
response = meth(req, response)
File "C:\Python34\lib\urllib\request.py", line 574, in http_response
'http', request, response, code, msg, hdrs)
File "C:\Python34\lib\urllib\request.py", line 499, in error
return self._call_chain(*args)
File "C:\Python34\lib\urllib\request.py", line 433, in _call_chain
result = func(*args)
File "C:\Python34\lib\urllib\request.py", line 582, in http_error_default
raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 404: File not found
----------------------------------------------------------------------
Ran 1 test in 0.032s
FAILED (errors=1)
爲什麼測試用例會掛起,如果有2個測試出錯?
你的回答可以解決我的問題。謝謝。你能幫我理解爲什麼我的帖子中提到的問題不會出現在這個代碼中:https://gist.github.com/anonymous/9744045這似乎是在做一個平面模塊而不是單元測試測試案件? –
每個測試都是'FooTest'的新實例(print'id(self)'以確認這一點),所以前面的'HTTPServer'不會被垃圾收集。在gist中更改代碼以使用'httpd1'和'httpd2',或者只保留對'sock = httpd.socket'的引用。這應該讓它掛起。 – eryksun
謝謝。將變量更改爲'httpd1'和'httpd2'的確會導致代碼掛起。你知道爲什麼http://docs.python.org/3.4/library/socketserver.html沒有提到這個'server_close'方法嗎? –