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from django.test import TestCase
from .models import Document
class FileFieldTests(TestCase):
def test_clearable(self):
"""
FileField.save_form_data() will clear its instance attribute value if
passed False.
"""
d = Document(myfile='something.txt')
self.assertEqual(d.myfile, 'something.txt')
field = d._meta.get_field('myfile')
field.save_form_data(d, False)
self.assertEqual(d.myfile, '')
def test_unchanged(self):
"""
FileField.save_form_data() considers None to mean "no change" rather
than "clear".
"""
d = Document(myfile='something.txt')
self.assertEqual(d.myfile, 'something.txt')
field = d._meta.get_field('myfile')
field.save_form_data(d, None)
self.assertEqual(d.myfile, 'something.txt')
def test_changed(self):
"""
FileField.save_form_data(), if passed a truthy value, updates its
instance attribute.
"""
d = Document(myfile='something.txt')
self.assertEqual(d.myfile, 'something.txt')
field = d._meta.get_field('myfile')
field.save_form_data(d, 'else.txt')
self.assertEqual(d.myfile, 'else.txt')
def test_delete_when_file_unset(self):
"""
Calling delete on an unset FileField should not call the file deletion
process, but fail silently (#20660).
"""
d = Document()
d.myfile.delete()
def test_refresh_from_db(self):
d = Document.objects.create(myfile='something.txt')
d.refresh_from_db()
self.assertIs(d.myfile.instance, d)
def test_defer(self):
Document.objects.create(myfile='something.txt')
self.assertEqual(Document.objects.defer('myfile')[0].myfile, 'something.txt')
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