Test-Driven Development with Python, 3rd Edition

Chapter 26. The Token Social Bit, the Page Pattern, and an Exercise for the Reader

Are jokes about how “everything has to be social now” slightly old hat? Yes, Harry; they were old hat 10 years ago when you started writing this book, and they’re positively prehistoric now. Irregardless, let’s say lists are often better shared. We should allow our users to collaborate on their lists with other users.

Along the way, we’ll improve our FTs by starting to implement something called the “page object pattern”. Then, rather than showing you explicitly what to do, I’m going to let you write your unit tests and application code by yourself. Don’t worry; you won’t be totally on your own! I’ll give an outline of the steps to take, as well as some hints and tips.

But still—​if you haven’t already, this is the chapter where you get a chance to spread your wings. Enjoy!

An FT with Multiple Users, and addCleanup

Let’s get started—​we’ll need two users for this FT:

src/functional_tests/test_sharing.py (ch26l001)

from selenium import webdriver
from selenium.webdriver.common.by import By

from .base import FunctionalTest


def quit_if_possible(browser):
    try:
        browser.quit()
    except:
        pass


class SharingTest(FunctionalTest):
    def test_can_share_a_list_with_another_user(self):
        # Edith is a logged-in user
        self.create_pre_authenticated_session("[e-mail]")
        edith_browser = self.browser
        self.addCleanup(lambda: quit_if_possible(edith_browser))

        # Her friend Onesiphorus is also hanging out on the lists ...