问题
I'm having an issue with running unit tests using selenium and the PhantomJS driver. It seems to be related to resource contention for stderr/stdout in the PhantomJS process. The error is:
$ python -m unittest selenium_failure.SeleniumTestCase
[]
[{u'timestamp': 1395857498698, u'message': u'{"log":{"version":"1.2","creator":{"name":"PhantomJS","version":"1.9.7"},"pages":[{"startedDateTime":"2014-03-26T18:11:38.347Z","id":"https://www.google.com/","title":"Google","pageTimings":{"onLoad":294}}],"entries":[{"startedDateTime":"2014-03-26T18:11:38.344Z","time":127,"request":{"method":"GET","url":"https://www.google.com/","httpVersion":"HTTP/1.1","cookies":[],"headers":[{"name":"User-Agent","value":"Mozilla/5.0 (Macintosh; Intel Mac OS X) AppleWebKit/534.34 (KHTML, like Gecko) PhantomJS/1.9.7 Safari/534.34"},{"name":"Accept","value":"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"}],"queryString":[],"headersSize":-1,"bodySize":-1},"response":{"status":200,"statusText":"OK","httpVersion":"HTTP/1.1","cookies":[],"headers":[{"name":"Date","value":"Wed, 26 Mar 2014 18:11:37 GMT"},{"name":"Expires","value":"-1"},{"name":"Cache-Control","value":"private, max-age=0"},{"name":"Content-Type","value":"text/html; charset=UTF-8"},{"name":"Set-Cookie",E
======================================================================
ERROR: test_that_something_fails (selenium_failure.SeleniumTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
File "selenium_failure.py", line 16, in test_that_something_fails
print repr(self.selenium.get_log('har'))
IOError: [Errno 35] Resource temporarily unavailable
----------------------------------------------------------------------
Ran 1 test in 2.398s
FAILED (errors=1)
More detailed gist here: https://gist.github.com/lucaswiman/9788422
import unittest
import logging
from selenium.webdriver import phantomjs
import sys
class SeleniumTestCase(unittest.TestCase):
def setUp(self):
self.selenium = phantomjs.webdriver.WebDriver()
def tearDown(self):
self.selenium.quit()
def test_that_something_fails(self):
self.selenium.get('https://www.google.com')
print repr(self.selenium.get_log('browser'))
print repr(self.selenium.get_log('har'))
raise AssertionError()
The error is reproducible with that gist on OS X, but not on Ubuntu 12.04. I believe it's not specific to OS X, since I've seen a similar error for our integration tests on running on Ubuntu, though I haven't been able to reproduce it in an isolated form.
- Python 2.7.6
- selenium==2.35.0
- phantomjs@1.9.7
回答1:
Fixed! A coworker pointed me to this related issue: http://trac.edgewall.org/ticket/2066#comment:1 I modified the patch there to make sys.__stderr__ and sys.__stdout__ have the block flag. Calling that function immediately after the instantiation of the phantomjs WebDriver allowed the stderr to be sent to stderr.
来源：https://stackoverflow.com/questions/22669734/ioerror-errno-35-resource-temporarily-unavailable-with-phantomjs-python-s