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import pickle
from django.core.exceptions import ValidationError
from django.core.files.uploadedfile import SimpleUploadedFile
from django.forms import FileField
from django.test import SimpleTestCase
class FileFieldTest(SimpleTestCase):
def test_filefield_1(self):
f = FileField()
with self.assertRaisesMessage(ValidationError, "'This field is required.'"):
f.clean("")
with self.assertRaisesMessage(ValidationError, "'This field is required.'"):
f.clean("", "")
self.assertEqual("files/test1.pdf", f.clean("", "files/test1.pdf"))
with self.assertRaisesMessage(ValidationError, "'This field is required.'"):
f.clean(None)
with self.assertRaisesMessage(ValidationError, "'This field is required.'"):
f.clean(None, "")
self.assertEqual("files/test2.pdf", f.clean(None, "files/test2.pdf"))
no_file_msg = "'No file was submitted. Check the encoding type on the form.'"
file = SimpleUploadedFile(None, b"")
file._name = ""
with self.assertRaisesMessage(ValidationError, no_file_msg):
f.clean(file)
with self.assertRaisesMessage(ValidationError, no_file_msg):
f.clean(file, "")
self.assertEqual("files/test3.pdf", f.clean(None, "files/test3.pdf"))
with self.assertRaisesMessage(ValidationError, no_file_msg):
f.clean("some content that is not a file")
with self.assertRaisesMessage(
ValidationError, "'The submitted file is empty.'"
):
f.clean(SimpleUploadedFile("name", None))
with self.assertRaisesMessage(
ValidationError, "'The submitted file is empty.'"
):
f.clean(SimpleUploadedFile("name", b""))
self.assertEqual(
SimpleUploadedFile,
type(f.clean(SimpleUploadedFile("name", b"Some File Content"))),
)
self.assertIsInstance(
f.clean(
SimpleUploadedFile(
"我隻氣墊船裝滿晒鱔.txt", "मेरी मँडराने वाली नाव सर्पमीनों से भरी ह".encode()
)
),
SimpleUploadedFile,
)
self.assertIsInstance(
f.clean(
SimpleUploadedFile("name", b"Some File Content"), "files/test4.pdf"
),
SimpleUploadedFile,
)
def test_filefield_2(self):
f = FileField(max_length=5)
with self.assertRaisesMessage(
ValidationError,
"'Ensure this filename has at most 5 characters (it has 18).'",
):
f.clean(SimpleUploadedFile("test_maxlength.txt", b"hello world"))
self.assertEqual("files/test1.pdf", f.clean("", "files/test1.pdf"))
self.assertEqual("files/test2.pdf", f.clean(None, "files/test2.pdf"))
self.assertIsInstance(
f.clean(SimpleUploadedFile("name", b"Some File Content")),
SimpleUploadedFile,
)
def test_filefield_3(self):
f = FileField(allow_empty_file=True)
self.assertIsInstance(
f.clean(SimpleUploadedFile("name", b"")), SimpleUploadedFile
)
def test_filefield_changed(self):
"""
The value of data will more than likely come from request.FILES. The
value of initial data will likely be a filename stored in the database.
Since its value is of no use to a FileField it is ignored.
"""
f = FileField()
# No file was uploaded and no initial data.
self.assertFalse(f.has_changed("", None))
# A file was uploaded and no initial data.
self.assertTrue(
f.has_changed("", {"filename": "resume.txt", "content": "My resume"})
)
# A file was not uploaded, but there is initial data
self.assertFalse(f.has_changed("resume.txt", None))
# A file was uploaded and there is initial data (file identity is not dealt
# with here)
self.assertTrue(
f.has_changed(
"resume.txt", {"filename": "resume.txt", "content": "My resume"}
)
)
def test_disabled_has_changed(self):
f = FileField(disabled=True)
self.assertIs(f.has_changed("x", "y"), False)
def test_file_picklable(self):
self.assertIsInstance(pickle.loads(pickle.dumps(FileField())), FileField)
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