python web自动化测试中失败截图方法汇总
在使用web自动化测试中,用例失败则自动截图的网上也有,但实际能落地的却没看到,现总结在在实际应用中失败截图的几种方法:
一、使用unittest框架截图方法:
1、在tearDown中写入截图的功能,如下:
import sys
class SeleniumTest(unittest2.TestCase): ... def tearDown(self): if sys.exc_info()[0]: test_method_name = self._testMethodName self.driver.save_screenshot("Screenshots/%s.png" % test_method_name) super(SeleniumTest, self).tearDown()
注意,self._testMethodName是unittest特有的,在其它框架中不使用
在测试中,如果用例失败,就会自动以对应的测试函数名为文件名截图存储
2、自定义函数,重写unittest中的run方法:
class ScreenShotUtil: "Screenshot Utility Class" @staticmethod def take_screenshot(webdriver, file_name="error.png"): """ @param webdriver: WebDriver. @type webdriver: WebDriver @param file_name: Name to label this screenshot. @type file_name: str """ if isinstance(webdriver, remote.webdriver.WebDriver): # Get Screenshot over the wire as base64 base64_data = webdriver.get_screenshot_as_base64() screenshot_data = base64.decodestring(base64_data) screenshot_file = open(filename, "w") screenshot_file.write(screenshot_data) screenshot_file.close() else: webdriver.save_screenshot(filename)
在引中unittest时,重写run方法:
... class ScreenCaptureTestCase(unittest.TestCase): ... # Defining an init method so we can pass it a webdriver. def __init__(self, methodName='runTest', webdriver=None, screenshot_util=None): super(WDBaseTest, self).__init__(methodName) if webdriver_provider == None: self._webdriver = WebDriverSingleton.get_instance() else: self._webdriver = webdriver if screenshot_util == None: self._screenshot_util = WebScreenShotUtil else: self._screenshot_util = screenshot_util ... def run(self, result=None): """ 这里重写run方法 """ orig_result = result if result is None: result = self.defaultTestResult() startTestRun = getattr(result, 'startTestRun', None) if startTestRun is not None: startTestRun() ... more pyunit code ... except self.failureException: # Insert our Take Screenshot on test failure code. fname = str(self).replace("(", "").replace(")", "").replace(" ", "_") fmt='%y-%m-%d_%H.%M.%S_.PNG' filename = datetime.datetime.now().strftime(fmt) self._screenshot_util.take_screenshot(self._webdriver, filename) result.addFailure(self, sys.exc_info()) ... more pyunit code... except: # Do the same thing again for errors. fname = str(self).replace("(", "").replace(")", "").replace(" ", "_") fmt='%y-%m-%d_%H.%M.%S_.PNG' filename = datetime.datetime.now().strftime(fmt) self._screenshot_util.take_screenshot(self._webdriver, filename) result.addError(self, sys.exc_info()) ...
完成后,测试时,失败则会已时间来截图,当然你也可以将filename按你喜好定义
二、nose框架失败截图
nose框架是unittest的优化,在实际使用中可以继承unittest.TestCase的方法后继续使用一中的方法1,如果没导入unittest.TestCase时,也可以使用方法1,但要作小改动,如下:
1、tearDown写截图
class SeleniumTest(unittest2.TestCase): ... def tearDown(self): if sys.exc_info()[0]: test_method_name = test_names = [n for n in dir(self) if n.startswith('test_')][0] #注意了,这里与unittest的不一样 self.driver.save_screenshot("Screenshots/%s.png" % test_method_name) super(SeleniumTest, self).tearDown()
2、修改nose源码,未完待续
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