title: python selenium all test in one session browser
body: <p>I have a question.</p>
  
  <p>I have 10 classes in 10 files and one main class and class with user log.
  I run all tests in the main class. I would like to run 10 at once. At present, the browser opens up to 10 times with each class.
  I would like 10 tests to take place in 1 browser session.
  It is possible? Because I can not do this. Please, help me, thank you! Me login class:</p>
  
  <pre><code>class Login(unittest.TestCase):
  @classmethod
  def setUpClass(cls):
      cls.browser = webdriver.Chrome()
  
  def setUp(self):
      self.browser.get("www")
      username = self.browser.find_element_by_id("username")
      password = self.browser.find_element_by_id("password")
      username.send_keys("aaaa")
      password.send_keys("ssswww")
      self.browser.find_element_by_id("button").click()
  
  def tearDown(self):
      self.browser.get("about:blank")
  
  @classmethod
  def tearDownClass(cls):
      cls.browser.quit()
  </code></pre>