接收属性错误＆＃39; FirefoxBinary＆＃39;对象没有属性＆＃39; _get_firefox_output＆＃39;

Question

星期三，我的代码工作了。我今天回来了，我的代码不再有效。没人触及它，不包括我自己。我收到以下错误消息：

'FirefoxBinary' object has no attribute '_get_firefox_output'

我正在使用Selenium / Python的SST框架。我的代码没有直接调用browser.py文件，因为我只调用actions，cases和config。我已经卸载并重新安装了SST和Firefox，结果相同。

这是我的代码：

import unittest
from sst.actions import *
from sst import cases, config

class TestMyTest(cases.SSTTestCase):

   def test_mytestcase_home_page(self):
        config.results_directory = "C:/Users/Brenda/test/SST-Test-Project/results"
        go_to('http://www.myhomepage.com')
        assert_title_contains('My Home Page')
        take_screenshot(filename='home_page.png',add_timestamp=True)
        assert_element(tag='a', text='Log in')

我已将Firefox从34.0.5降级为32.我正在运行python 2.7.8。我也在运行SST 0.2.4。完整的回溯错误消息是：

C:\Python27\python.exe C:/Users/Brenda/test/SST-Test-Project/MySSTTest.py
E
======================================================================
ERROR: test_mytestcase_home_page (__main__.TestMyTest)
----------------------------------------------------------------------
_StringException: Traceback (most recent call last):
  File "C:\Python27\lib\site-packages\sst\cases.py", line 75, in setUp
    self.start_browser()
  File "C:\Python27\lib\site-packages\sst\cases.py", line 102, in start_browser
    self._start_browser()
  File "C:\Python27\lib\site-packages\sst\cases.py", line 95, in _start_browser
    self.browser = self.browser_factory.browser()
  File "C:\Python27\lib\site-packages\sst\browsers.py", line 211, in browser
    return self.webdriver_class(self.profile)
  File "C:\Python27\lib\site-packages\sst\browsers.py", line 183, in __init__
    firefox_profile, FirefoxBinary(), timeout, capabilities, proxy)
  File "C:\Python27\lib\site-packages\selenium\webdriver\firefox\webdriver.py", line 59, in      __init__
    self.binary, timeout),
  File "C:\Python27\lib\site-packages\selenium\webdriver\firefox\extension_connection.py", line 47, in __init__
    self.binary.launch_browser(self.profile)
  File "C:\Python27\lib\site-packages\selenium\webdriver\firefox\firefox_binary.py", line 66, in launch_browser
    self._wait_until_connectable()
  File "C:\Python27\lib\site-packages\sst\browsers.py", line 172, in _wait_until_connectable
    % (self._get_firefox_output(),))
AttributeError: 'FirefoxBinary' object has no attribute '_get_firefox_output'

Answer 1

^{（取自Learn to Read the Source, Luke）}

在探索selenium python绑定的源代码之后，我发现在selenium 2.44中_get_firefox_output()类中没有FirefoxBinary方法可用。与contained it：

的版本2.43相对

def _get_firefox_output(self):
    return self.process.communicate()[0]

def _wait_until_connectable(self):
    """Blocks until the extension is connectable in the firefox."""
    count = 0
    while not utils.is_connectable(self.profile.port):
        if self.process.poll() is not None:
            # Browser has exited
            raise WebDriverException("The browser appears to have exited "
                  "before we could connect. The output was: %s" %
                  self._get_firefox_output())
        if count == 30:
            self.kill()
            raise WebDriverException("Can't load the profile. Profile "
                  "Dir: %s Firefox output: %s" % (
                      self.profile.path, self._get_firefox_output()))
        count += 1
        time.sleep(1)
    return True

换句话说， SST 0.2.4与硒2.44 不兼容。将selenium降级为2.43。

Answer 2

嗯......这里还有其他事情发生。不是真的答案，但是......请看下面突出显示的代码。

我已经sst==0.2.4在我的Mac上使用selenium==2.44.0进行了测试，但只有@ alecxe的答案（回到selenium==2.43.0非常感谢）让我的测试工作在我们的无头CI测试机器上。两者都在Python 2.7.6; Firefox 34

Mac测试

$ sst-run -x -d mytests
starting virtual display...Tests running...
    DEBUG:SST:Starting browser (attempt: 1)
    DEBUG:SST:Cannot connect to process 7424 with port: 53449, count 1
    DEBUG:SST:Cannot connect to process 7424 with port: 53449, count 2
    DEBUG:SST:Browser started: firefox
    DEBUG:SST:Going to... http://www.ubuntu.com/
    DEBUG:SST:Waiting for 'get_element'
    DEBUG:SST:Stopping browser
mytests.foo ... OK (3.487 secs)
Ran 1 test in 3.487s
OK
stopping virtual display...
(selenium-simple-test)iainhouston@iain-macbook:~/Documents/web/PyProjects/selenium-simple-test
$ pip freeze
    argparse==1.3.0
    extras==0.0.3
    junitxml==0.7
    python-mimeparse==0.1.4
    python-subunit==1.0.0
    selenium==2.44.0
    six==1.9.0
    sst==0.2.4
    testtools==1.5.0
    unittest2==0.8.0
    wsgiref==0.1.2

Ubuntu无头服务器测试

以前，我Found existing installation: selenium 2.44.0获得AttributeError: 'FirefoxBinary' object has no attribute '_get_firefox_output';在pip install selenium==2.43测试工作之后。

(testENV)iain@jude:~/selenium_simple_test$ sst-run -x -d mytests
starting virtual display...Tests running...
    DEBUG:SST:Starting browser (attempt: 1)
    DEBUG:SST:Cannot connect to process 4023 with port: 42899, count 1
    DEBUG:SST:Cannot connect to process 4023 with port: 42899, count 2
    DEBUG:SST:Cannot connect to process 4023 with port: 42899, count 3
    DEBUG:SST:Cannot connect to process 4023 with port: 42899, count 4
    DEBUG:SST:Browser started: firefox
    DEBUG:SST:Going to... http://www.ubuntu.com
    DEBUG:SST:Waiting for 'get_element'
    DEBUG:SST:Stopping browser
mytests.tests ... OK (5.951 secs)
Ran 1 test in 5.951s
OK
stopping virtual display...
(testENV)iain@jude:~/selenium_simple_test$ pip freeze
    argparse==1.2.1
    extras==0.0.3
    junitxml==0.7
    python-mimeparse==0.1.4
    python-subunit==1.0.0
    selenium==2.43.0
    six==1.9.0
    sst==0.2.4
    testtools==1.5.0
    unittest2==0.8.0
    wsgiref==0.1.2