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214 lines
8.1 KiB
Python
214 lines
8.1 KiB
Python
import os
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import pickle
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import sys
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import tempfile
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import unittest
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from pathlib import Path
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from django.core.exceptions import FieldError, SuspiciousFileOperation
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from django.core.files import File, 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 import IntegrityError, models
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from django.test import TestCase, override_settings
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from django.test.utils import isolate_apps
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from django.utils.version import PY311
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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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@unittest.skipIf(sys.platform == "win32", "Crashes with OSError on Windows.")
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def test_save_without_name(self):
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with tempfile.NamedTemporaryFile(suffix=".txt") as tmp:
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document = Document.objects.create(myfile="something.txt")
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document.myfile = File(tmp)
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msg = f"Detected path traversal attempt in '{tmp.name}'"
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with self.assertRaisesMessage(SuspiciousFileOperation, msg):
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document.save()
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def test_save_content_file_without_name(self):
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d = Document()
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d.myfile = ContentFile(b"")
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msg = "File for myfile must have the name attribute specified to be saved."
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with self.assertRaisesMessage(FieldError, msg) as cm:
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d.save()
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if PY311:
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self.assertEqual(
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cm.exception.__notes__, ["Pass a 'name' argument to ContentFile."]
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)
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def test_delete_content_file(self):
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file = ContentFile(b"", name="foo")
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d = Document.objects.create(myfile=file)
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d.myfile.delete()
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self.assertIsNone(d.myfile.name)
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msg = "The 'myfile' attribute has no file associated with it."
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with self.assertRaisesMessage(ValueError, msg):
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getattr(d.myfile, "file")
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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(
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sys.platform == "win32", "Windows doesn't support moving open files."
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)
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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(
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"something.txt", "text/plain", 0, "UTF-8"
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) 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(
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os.path.exists(tmp_file_path), "Temporary file still exists"
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)
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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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def test_media_root_pathlib(self):
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with tempfile.TemporaryDirectory() as tmp_dir:
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with override_settings(MEDIA_ROOT=Path(tmp_dir)):
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with TemporaryUploadedFile(
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"foo.txt", "text/plain", 1, "utf-8"
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) as tmp_file:
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document = Document.objects.create(myfile=tmp_file)
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self.assertIs(
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document.myfile.storage.exists(
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os.path.join("unused", "foo.txt")
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),
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True,
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)
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def test_pickle(self):
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with tempfile.TemporaryDirectory() as tmp_dir:
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with override_settings(MEDIA_ROOT=Path(tmp_dir)):
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with open(__file__, "rb") as fp:
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file1 = File(fp, name="test_file.py")
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document = Document(myfile="test_file.py")
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document.myfile.save("test_file.py", file1)
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try:
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dump = pickle.dumps(document)
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loaded_document = pickle.loads(dump)
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self.assertEqual(document.myfile, loaded_document.myfile)
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self.assertEqual(
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document.myfile.url,
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loaded_document.myfile.url,
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)
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self.assertEqual(
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document.myfile.storage,
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loaded_document.myfile.storage,
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)
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self.assertEqual(
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document.myfile.instance,
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loaded_document.myfile.instance,
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)
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self.assertEqual(
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document.myfile.field,
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loaded_document.myfile.field,
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)
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myfile_dump = pickle.dumps(document.myfile)
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loaded_myfile = pickle.loads(myfile_dump)
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self.assertEqual(document.myfile, loaded_myfile)
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self.assertEqual(document.myfile.url, loaded_myfile.url)
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self.assertEqual(
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document.myfile.storage,
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loaded_myfile.storage,
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)
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self.assertEqual(
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document.myfile.instance,
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loaded_myfile.instance,
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)
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self.assertEqual(document.myfile.field, loaded_myfile.field)
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finally:
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document.myfile.delete()
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@isolate_apps("model_fields")
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def test_abstract_filefield_model(self):
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"""
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FileField.model returns the concrete model for fields defined in an
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abstract model.
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"""
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class AbstractMyDocument(models.Model):
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myfile = models.FileField(upload_to="unused")
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class Meta:
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abstract = True
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class MyDocument(AbstractMyDocument):
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pass
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document = MyDocument(myfile="test_file.py")
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self.assertEqual(document.myfile.field.model, MyDocument)
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