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one thing at a time. While our application only supports one list, this is the only URL
that makes sense. We’re still moving forwards, in that we’ll have a different URL for our
list and our home page, which is a step along the way to a more REST-ful design. Later,
when we have multiple lists, it will be easy to change.
Another way of thinking about it is as a problem-solving technique:
our new URL design is currently not implemented, so it works for 0
items. Ultimately, we want to solve for
n
items, but solving for 1 item
is a good step along the way.
Running the unit tests gives us an expected fail:
$
python3 manage.py test lists
[...]
AssertionError: '/' != '/lists/the-only-list-in-the-world/'
We can go adjust our
home_page
view in
lists/views.py
:
lists/views.py.
def
home_page
(
request
):
if
request
.
method
==
'POST'
:
Item
.
objects
.
create
(
text
=
request
.
POST
[
'item_text'
])
return
redirect
(
'/lists/the-only-list-in-the-world/'
)
items
=
Item
.
objects
.
all
()
return
render
(
request
,
'home.html'
, {
'items'
:
items
})
Of course, that will now totally break the functional tests, because there is no such URL
on our site yet. Sure enough, if you run them, you’ll find they fail just after trying to
submit the first item, saying that they can’t find the list table; it’s because URL
/the-only-
list-in-the-world/
doesn’t exist yet!
self.check_for_row_in_list_table('1: Buy peacock feathers')
[...]
selenium.common.exceptions.NoSuchElementException: Message: 'Unable to locate
element: {"method":"id","selector":"id_list_table"}' ; Stacktrace:
So, let’s build a special URL for our one and only list.
Testing Views, Templates, and URLs Together with the
Django Test Client
In previous chapters we’ve used unit tests that check the URL resolution explicitly, that
test view functions by actually calling them, and that check that views render templates
correctly too. Django actually provides us with a little tool that can do all three at once,
which we’ll use now.
Testing Views, Templates, and URLs Together with the Django Test Client
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