384 / 478
self
.
assertEqual
(
response
,
mock_redirect
.
return_value
)
mock_redirect
.
assert_called_once_with
(
mock_form
.
save
.
return_value
)
#
The mocked
form.save
function is returning an object, which we expect our
view to be able to use.
Identifying Implicit Contracts
It’s worth reviewing each of the tests in
NewListViewUnitTest
and seeing what each
mock is saying about the implicit contract:
lists/tests/test_views.py.
def
test_passes_POST_data_to_NewListForm
(
self
,
mockNewListForm
):
[
...
]
mockNewListForm
.
assert_called_once_with
(
data
=
self
.
request
.
POST
)
#
def
test_saves_form_with_owner_if_form_valid
(
self
,
mockNewListForm
):
mock_form
=
mockNewListForm
.
return_value
mock_form
.
is_valid
.
return_value
=
True
#
new_list2
(
self
.
request
)
mock_form
.
save
.
assert_called_once_with
(
owner
=
self
.
request
.
user
)
#
def
test_does_not_save_if_form_invalid
(
self
,
mockNewListForm
):
[
...
]
mock_form
.
is_valid
.
return_value
=
False
#
[
...
]
@patch
(
'lists.views.redirect'
)
def
test_redirects_to_form_returned_object_if_form_valid
(
self
,
mock_redirect
,
mockNewListForm
):
[
...
]
mock_redirect
.
assert_called_once_with
(
mock_form
.
save
.
return_value
)
#
def
test_renders_home_template_with_form_if_form_invalid
(
[
...
]
We need to be able to initialise our form by passing it a POST request as data.
It should have an
is_valid()
function which returns True or False
appropriately, based on the input data.
The form should have a
.save
method which will accept a
request.user
, which
may or may not be a logged-in user, and deal with it appropriately.
The form’s
.save
method should return a new list object, for our view to redirect
the user to.
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|
Chapter 19: Test Isolation, and “Listening to Your Tests”