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97 lines
3.4 KiB
Python
97 lines
3.4 KiB
Python
import os
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import sys
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import unittest
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from django.core.files import temp
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from django.core.files.base import ContentFile
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from django.core.files.uploadedfile import TemporaryUploadedFile
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from django.db.utils import IntegrityError
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from django.test import TestCase, override_settings
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from .models import Document
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class FileFieldTests(TestCase):
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def test_clearable(self):
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"""
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FileField.save_form_data() will clear its instance attribute value if
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passed False.
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"""
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d = Document(myfile='something.txt')
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self.assertEqual(d.myfile, 'something.txt')
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field = d._meta.get_field('myfile')
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field.save_form_data(d, False)
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self.assertEqual(d.myfile, '')
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def test_unchanged(self):
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"""
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FileField.save_form_data() considers None to mean "no change" rather
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than "clear".
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"""
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d = Document(myfile='something.txt')
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self.assertEqual(d.myfile, 'something.txt')
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field = d._meta.get_field('myfile')
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field.save_form_data(d, None)
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self.assertEqual(d.myfile, 'something.txt')
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def test_changed(self):
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"""
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FileField.save_form_data(), if passed a truthy value, updates its
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instance attribute.
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"""
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d = Document(myfile='something.txt')
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self.assertEqual(d.myfile, 'something.txt')
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field = d._meta.get_field('myfile')
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field.save_form_data(d, 'else.txt')
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self.assertEqual(d.myfile, 'else.txt')
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def test_delete_when_file_unset(self):
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"""
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Calling delete on an unset FileField should not call the file deletion
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process, but fail silently (#20660).
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"""
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d = Document()
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d.myfile.delete()
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def test_refresh_from_db(self):
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d = Document.objects.create(myfile='something.txt')
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d.refresh_from_db()
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self.assertIs(d.myfile.instance, d)
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def test_defer(self):
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Document.objects.create(myfile='something.txt')
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self.assertEqual(Document.objects.defer('myfile')[0].myfile, 'something.txt')
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def test_unique_when_same_filename(self):
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"""
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A FileField with unique=True shouldn't allow two instances with the
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same name to be saved.
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"""
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Document.objects.create(myfile='something.txt')
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with self.assertRaises(IntegrityError):
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Document.objects.create(myfile='something.txt')
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@unittest.skipIf(sys.platform.startswith('win'), "Windows doesn't support moving open files.")
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# The file's source and destination must be on the same filesystem.
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@override_settings(MEDIA_ROOT=temp.gettempdir())
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def test_move_temporary_file(self):
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"""
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The temporary uploaded file is moved rather than copied to the
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destination.
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"""
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with TemporaryUploadedFile('something.txt', 'text/plain', 0, 'UTF-8') as tmp_file:
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tmp_file_path = tmp_file.temporary_file_path()
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Document.objects.create(myfile=tmp_file)
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self.assertFalse(os.path.exists(tmp_file_path), 'Temporary file still exists')
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def test_open_returns_self(self):
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"""
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FieldField.open() returns self so it can be used as a context manager.
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"""
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d = Document.objects.create(myfile='something.txt')
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# Replace the FileField's file with an in-memory ContentFile, so that
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# open() doesn't write to disk.
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d.myfile.file = ContentFile(b'', name='bla')
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self.assertEqual(d.myfile, d.myfile.open())
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