测试山羊中的 Python AttributeError

Question

我刚刚开始处理 Test-Driven Development with Python 并且不理解我得到的 AttributeError，因为它与书中的不同。

运行 selenium 测试的代码是：

from selenium import webdriver
import unittest

class new_visitor_test(unittest.TestCase):

        def set_up(self):
                self.browser = webdriver.Firefox()

        def tear_down(self):
                self.browser.quit()

        def test_can_start_a_list_and_retrieve_it_later(self):
                self.browser.get('http://localhost:8000')

                self.assertIn('To-Do', self.browser.title)
                self.fail('Finish the test!')

if __name__ == '__main__':
        unittest.main(warnings='ignore')

错误应该是：

Traceback (most recent call last):
File "functional_tests.py", line 18, in
test_can_start_a_list_and_retrieve_it_later
self.assertIn('To-Do', self.browser.title)
AssertionError: 'To-Do' not found in 'Welcome to Django'

我得到的错误是：

Traceback (most recent call last):
  File "functional_tests.py", line 13, in test_can_start_a_list_and_retrieve_it_later
    self.browser.get('http://localhost:8000')
AttributeError: 'new_visitor_test' object has no attribute 'browser'

是什么导致了这个错误？

Answer 1

setup方法应该叫setUp()，teardown方法-tearDown()：

class new_visitor_test(unittest.TestCase):
    def setUp(self):
        self.browser = webdriver.Firefox()

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

    def test_can_start_a_list_and_retrieve_it_later(self):
        self.browser.get('http://localhost:8000')

        self.assertIn('To-Do', self.browser.title)
        self.fail('Finish the test!')

方法其实是named correctly in the book。