python - 异常 : Failed to start new browser session: Error while launching browser Selenium in Python

Question

在 Python 中运行基本的 Selenium 测试脚本时出现以下错误:

======================================================================
ERROR: test_untitled (__main__.TestTesting)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "TestTesting.py", line 15, in setUp
    self.selenium.start()
  File "/usr/lib/python2.6/dist-packages/selenium.py", line 166, in start
    result = self.get_string("getNewBrowserSession", [self.browserStartCommand, self.browserURL])
  File "/usr/lib/python2.6/dist-packages/selenium.py", line 195, in get_string
    result = self.do_command(verb, args)
  File "/usr/lib/python2.6/dist-packages/selenium.py", line 191, in do_command
    raise Exception, data
Exception: Failed to start new browser session: Error while launching browser

----------------------------------------------------------------------
Ran 1 test in 20.427s

FAILED (errors=1)

代码是从 Selenium IDE(firefox 插件)生成的，所以我不确定它为什么不起作用。我的猜测是某种配置不正确，但我不确定。这是我的代码:

from selenium import selenium

class TestTesting(unittest.TestCase):
    def setUp(self):
        self.verificationErrors = []
        self.selenium = selenium("localhost", 4444, "*firefox", "http://www.google.com/")
        self.selenium.start()

    def test_untitled(self):
        sel = self.selenium
        sel.open("/firefox?client=firefox-a&rls=org.mozilla:en-US:official")
        sel.type("sf", "test")
        sel.click("btnG")
        sel.wait_for_page_to_load("30000")

    def tearDown(self):
        self.selenium.stop()
        self.assertEqual([], self.verificationErrors)

if __name__ == "__main__":
    unittest.main()

服务器在 Ubuntu 上运行。

我怎样才能避免这个错误？

Answer 1

我要解决的问题是未设置 Firefox 的显示。所以我需要执行以下语句:

export DISPLAY=:0

就在我启动 Selenium 服务器之前。这解决了问题，但出现了一个新问题。