在 python 中简化 selenium 输出

Question

我想让 selenium 为我目前保存到输出日志的 selenium 测试输出一个更简单和直接的输出

======================================================================
ERROR: test3_AnswerTest (__main__.Test)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "test.py", line 98, in test3_FashionTest
    driver.find_element_by_xpath("//a[contains(.,'Answer')]").click()
  File "/usr/lib/python2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 230, in find_element_by_xpath
    return self.find_element(by=By.XPATH, value=xpath)
  File "/usr/lib/python2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 662, in find_element
    {'using': by, 'value': value})['value']
  File "/usr/lib/python2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 173, in execute
    self.error_handler.check_response(response)
  File "/usr/lib/python2.7/site-packages/selenium/webdriver/remote/errorhandler.py", line 166, in check_response
    raise exception_class(message, screen, stacktrace)
NoSuchElementException: Message: Error Message => 'Unable to find element with xpath '//a[contains(.,'Ass')]''
 caused by Request => {"headers":{"Accept":"application/json","Accept-Encoding":"identity","Connection":"close","Content-Length":"106","Content-Type":"application/json;charset=UTF-8","Host":"10.0.0.100:49044","User-Agent":"Python-urllib/2.7"},"httpVersion":"1.1","method":"POST","post":"{\"using\": \"xpath\", \"sessionId\": \"fd4e8db0-a0c6-11e4-9624-f33660aa508e\", \"value\": \"//a[contains(.,'Ass')]\"}","url":"/element","urlParsed":{"anchor":"","query":"","file":"element","directory":"/","path":"/element","relative":"/element","port":"","host":"","password":"","user":"","userInfo":"","authority":"","protocol":"","source":"/element","queryKey":{},"chunks":["element"]},"urlOriginal":"/session/fd4e8db0-a0c6-11e4-9624-f33660aa508e/element"}
Screenshot: available via screen

是否可以将此输出简化为这样的内容？

NoSuchElementException: Message: Error Message => 'Unable to find element with xpath '//a[contains(.,'Answer')]''

当前错误信息是

Traceback (most recent call last):
NoSuchElementException: Message: Error Message => 'Unable to find element with xpath '//a[contains(.,'Answer')]''
 caused by Request => {"headers":{"Accept":"application/json","Accept-Encoding":"identity","Connection":"close","Content-Length":"106","Content-Type":"application/json;charset=UTF-8","Host":"10.0.0.100:49044","User-Agent":"Python-urllib/2.7"},"httpVersion":"1.1","method":"POST","post":"{\"using\": \"xpath\", \"sessionId\": \"12e538b0-a0e3-11e4-af45-ff6a851f3fb0\", \"value\": \"//a[contains(.,'Ass')]\"}","url":"/element","urlParsed":{"anchor":"","query":"","file":"element","directory":"/","path":"/element","relative":"/element","port":"","host":"","password":"","user":"","userInfo":"","authority":"","protocol":"","source":"/element","queryKey":{},"chunks":["element"]},"urlOriginal":"/session/12e538b0-a0e3-11e4-af45-ff6a851f3fb0/element"}
Screenshot: available via screen

Answer 1

测试期间出现错误，这是错误回溯。

您可以做的是：

设置sys.tracebacklimit = 0

When this variable is set to an integer value, it determines the maximum number of levels of traceback information printed when an unhandled exception occurs. The default is 1000. When set to 0 or less, all traceback information is suppressed and only the exception type and value are printed.

拥有自己的 selenium webdriver 错误处理程序 以清除 selenium 错误回溯（tracebacklimit 不会影响它 - 您需要像这样手动执行）

工作示例：

import unittest
import sys

from selenium import webdriver
from selenium.common.exceptions import NoSuchElementException
from selenium.webdriver.remote.errorhandler import ErrorHandler


class MyHandler(ErrorHandler):
    def check_response(self, response):
        try:
            super(MyHandler, self).check_response(response)
        except NoSuchElementException as e:
            e.stacktrace = None
            # PhantomJS specific line:
            e.msg = json.loads(e.msg)['errorMessage']
            raise


class MyTestCase(unittest.TestCase):
    def setUp(self):
        self.driver = webdriver.Firefox()
        self.driver.error_handler = MyHandler()

    def test(self):
        self.driver.get("http://google.com")
        self.driver.find_element_by_id('illegal')

    def tearDown(self):
        self.driver.quit()


if __name__ == "__main__":
    sys.tracebacklimit = 0
    unittest.main()

这是控制台上的内容：

$ python test.py
E
======================================================================
ERROR: test (__main__.MyTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
NoSuchElementException: Message: u'Unable to locate element: {"method":"id","selector":"illegal"}' 

----------------------------------------------------------------------
Ran 1 test in 5.401s

FAILED (errors=1)

在 python 中简化 selenium 输出

Simplify selenium output in python

python

selenium

xpath

exception-handling

selenium-webdriver