python-tdd-book-src/src/lists/tests.py

from django.test import TestCase
from django.urls import resolve
from django.http import HttpRequest

from lists.views import home_page

class HomePageTest(TestCase):

    def test_root_url_resolves_to_home_page_view(self):
        found = resolve('/')
        self.assertEqual(found.func, home_page)

    def test_home_page_returns_correct_html(self):
        """
        1. Instead of manually creating HttpRequest object and calling view function to get response, pass in URL to `self.client.get()` and get response directly
        3. `.assertTemplateUsed` is the test method that Django Test Case provides. it checks whether template was used to render a response
        """

        response = self.client.get('/') #1
        self.assertTemplateUsed(response, 'home.html') #3