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Used assertRaisesMessage() to test Django's error messages.

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Mads Jensen 2017-05-28 21:37:21 +02:00 • committed by Tim Graham
parent 38988f289f
commit a51c4de194
69 changed files with 448 additions and 173 deletions
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24
tests/prefetch_related/tests.py
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@ -199,14 +199,22 @@ class PrefetchRelatedTests(TestCase):
def test_attribute_error(self):
qs = Reader.objects.all().prefetch_related('books_read__xyz')
with self.assertRaises(AttributeError) as cm:
msg = (
"Cannot find 'xyz' on Book object, 'books_read__xyz' "
"is an invalid parameter to prefetch_related()"
)
with self.assertRaisesMessage(AttributeError, msg) as cm:
list(qs)
self.assertIn('prefetch_related', str(cm.exception))
def test_invalid_final_lookup(self):
qs = Book.objects.prefetch_related('authors__name')
with self.assertRaises(ValueError) as cm:
msg = (
"'authors__name' does not resolve to an item that supports "
"prefetching - this is an invalid parameter to prefetch_related()."
)
with self.assertRaisesMessage(ValueError, msg) as cm:
list(qs)
self.assertIn('prefetch_related', str(cm.exception))
@ -337,14 +345,22 @@ class CustomPrefetchTests(TestCase):
def test_ambiguous(self):
# Ambiguous: Lookup was already seen with a different queryset.
with self.assertRaises(ValueError):
msg = (
"'houses' lookup was already seen with a different queryset. You "
"may need to adjust the ordering of your lookups."
)
with self.assertRaisesMessage(ValueError, msg):
self.traverse_qs(
Person.objects.prefetch_related('houses__rooms', Prefetch('houses', queryset=House.objects.all())),
[['houses', 'rooms']]
)
# Ambiguous: Lookup houses_lst doesn't yet exist when performing houses_lst__rooms.
with self.assertRaises(AttributeError):
msg = (
"Cannot find 'houses_lst' on Person object, 'houses_lst__rooms' is "
"an invalid parameter to prefetch_related()"
)
with self.assertRaisesMessage(AttributeError, msg):
self.traverse_qs(
Person.objects.prefetch_related(
'houses_lst__rooms',