Question

我正在尝试使用不同的setUp方法运行相同的测试用例。我尝试过使用nosetests并参数化，但似乎它不支持参数化setUp方法。这是我正在尝试做的一个例子：

...
from nose_parameterized import parameterized

class Example(unittest.TestCase):

    @parameterized.expand(['device1', 'device2'])
    def setUp(self, device):
        desired_caps = {}
        desired_caps['key1'] = device
        desired_caps['key2'] = 'constant value'

    self.driver = webdriver.Remote(url, desired_caps)

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

    def test_app_launch(self):
        # assert something

错误是：TypeError: setUp() takes exactly 2 arguments (1 given)。

有没有其他方法如何参数化setUp方法？我也研究了测鼻仪发生器，但它似乎也没办法。

Answer 1

使用类属性：

class Example(unittest.TestCase):

    # change before running tests
    device = None

    # make sure device is initialized
    def setUpClass(cls):
        if not cls.device:
            raise Exception("Please initialize device before running tests")

    def setUp(self):
        # consider moving to 'setUpClass'
        desired_caps = {}
        desired_caps['key1'] = Example.device
        desired_caps['key2'] = 'constant value'

    self.driver = webdriver.Remote(url, desired_caps)

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

    def test_app_launch(self):
        # assert something

分别对每个设备运行测试。您的代码建议可以将更多内容移动到setUpClass方法。

Answer 2

所以我的方法是设置一个基本测试，其中包含设备必须通过的所有测试。然后你必须使用他们自己的附加setUps从deviceTest继承的deviceTests，这将是特定于设备的。

# this is the base test. Everything that is not specific to the device is set up here. It also contains all the testCases.
import unittest
class deviceTest( unittest.TestCase ):

  def setUp( self ):
    '''
    General setUp here
    '''
    self.desired_caps = {}
    self.desired_caps['key2'] = 'constant value'

  def testWorkflow( self ):
    '''
    Here come the tests that the devices have to pass
    '''

class device1Test( deviceTest ):

  def setUp( self ):
    '''
    device1 specific setup
    '''
    #also run general setUp    
    deviceTest.setUp( self )
    self.desired_caps['key1'] = device
    self.driver = webdriver.Remote(url, desired_caps)


class device2Test( deviceTest ):

  def setUp( self ):
    '''
    device2 specific setup
    '''
    #also run general setUp
    deviceTest.setUp( self )
    self.desired_caps['key1'] = device
    self.driver = webdriver.Remote(url, desired_caps)


if __name__ == '__main__':
  suite = unittest.defaultTestLoader.loadTestsFromTestCase( device1Test )
  suite.addTest( unittest.defaultTestLoader.loadTestsFromTestCase(device2Test ) )
  unittest.TextTestRunner( verbosity = 2 ).run( suite )

Answer 3

我只是在测试中使用参数化插件，并调出自定义设置和拆解方法，将设备参数作为测试的一部分传递给它们。使用unittest的setUp()几乎没有什么魔力，看起来你无论如何都在滥用它。

如何参数化python unittest setUp方法？

3 个答案: