python unittest 执行结果Ran 0 tests

在shell中运行如下脚本:

# -*- coding:utf-8 -*-

__author__ = 'wenbin'

import unittest
import time
from selenium import webdriver
from selenium.webdriver.common.keys import Keys


class BaiduSearch(unittest.TestCase):

    def setUp(self):
        self.driver = webdriver.Chrome()
        self.driver.maximize_window()
        self.url = 'https://www.baidu.com'

    def baidu_search(self):
        driver = self.driver
        driver.get(self.url)
        self.driver.implicitly_wait(5)
        try:
            assert u"百度一下，你就知道" in driver.title  
            print 'Title检查正确'
        except Exception as e:
            print ('Title检查失败：', format(e))

        elm = driver.find_element_by_xpath('//*[@id="kw"]')
        elm.clear()
        elm.send_keys(u'陈大发')  
        time.sleep(2)
        elm.send_keys(Keys.RETURN)
        # page = driver.page_source
        # print page

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

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

执行结果:

Ran 0 tests in 0.000s

OK

原因：unittest提供了全局的main()方法，使得一个单元测试模块变成可以直接运行的测试脚本，main()方法使用TestLoader类来搜索所有包含在模块中以“test”命名开头的测试方法，并自动执行它们
解决方法：将方法名“baidu_search”改为“test_baidu_search”即可