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# -*- coding: utf-8 -*-
from __future__ import unicode_literals
from io import BytesIO
import os
import gzip
import tempfile
import unittest
import zlib
from django.core.exceptions import ImproperlyConfigured
from django.core.files import File
from django.core.files.move import file_move_safe
from django.core.files.base import ContentFile
from django.core.files.uploadedfile import SimpleUploadedFile, UploadedFile
from django.core.files.temp import NamedTemporaryFile
from django.utils._os import upath
from django.utils import six
try:
from django.utils.image import Image
from django.core.files import images
except ImproperlyConfigured:
Image = None
class FileTests(unittest.TestCase):
def test_unicode_uploadedfile_name(self):
uf = UploadedFile(name='¿Cómo?', content_type='text')
self.assertIs(type(repr(uf)), str)
def test_unicode_file_name(self):
f = File(None, 'djángö')
self.assertIs(type(repr(f)), str)
def test_context_manager(self):
orig_file = tempfile.TemporaryFile()
base_file = File(orig_file)
with base_file as f:
self.assertIs(base_file, f)
self.assertFalse(f.closed)
self.assertTrue(f.closed)
self.assertTrue(orig_file.closed)
def test_namedtemporaryfile_closes(self):
"""
The symbol django.core.files.NamedTemporaryFile is assigned as
a different class on different operating systems. In
any case, the result should minimally mock some of the API of
tempfile.NamedTemporaryFile from the Python standard library.
"""
tempfile = NamedTemporaryFile()
self.assertTrue(hasattr(tempfile, "closed"))
self.assertFalse(tempfile.closed)
tempfile.close()
self.assertTrue(tempfile.closed)
def test_file_mode(self):
# Should not set mode to None if it is not present.
# See #14681, stdlib gzip module crashes if mode is set to None
file = SimpleUploadedFile("mode_test.txt", b"content")
self.assertFalse(hasattr(file, 'mode'))
gzip.GzipFile(fileobj=file)
def test_file_iteration(self):
"""
File objects should yield lines when iterated over.
Refs #22107.
"""
file = File(BytesIO(b'one\ntwo\nthree'))
self.assertEqual(list(file), [b'one\n', b'two\n', b'three'])
class NoNameFileTestCase(unittest.TestCase):
"""
Other examples of unnamed files may be tempfile.SpooledTemporaryFile or
urllib.urlopen()
"""
def test_noname_file_default_name(self):
self.assertEqual(File(BytesIO(b'A file with no name')).name, None)
def test_noname_file_get_size(self):
self.assertEqual(File(BytesIO(b'A file with no name')).size, 19)
class ContentFileTestCase(unittest.TestCase):
def test_content_file_default_name(self):
self.assertEqual(ContentFile(b"content").name, None)
def test_content_file_custom_name(self):
"""
Test that the constructor of ContentFile accepts 'name' (#16590).
"""
name = "I can have a name too!"
self.assertEqual(ContentFile(b"content", name=name).name, name)
def test_content_file_input_type(self):
"""
Test that ContentFile can accept both bytes and unicode and that the
retrieved content is of the same type.
"""
self.assertIsInstance(ContentFile(b"content").read(), bytes)
if six.PY3:
self.assertIsInstance(ContentFile("español").read(), six.text_type)
else:
self.assertIsInstance(ContentFile("español").read(), bytes)
class DimensionClosingBug(unittest.TestCase):
"""
Test that get_image_dimensions() properly closes files (#8817)
"""
@unittest.skipUnless(Image, "Pillow/PIL not installed")
def test_not_closing_of_files(self):
"""
Open files passed into get_image_dimensions() should stay opened.
"""
empty_io = BytesIO()
try:
images.get_image_dimensions(empty_io)
finally:
self.assertTrue(not empty_io.closed)
@unittest.skipUnless(Image, "Pillow/PIL not installed")
def test_closing_of_filenames(self):
"""
get_image_dimensions() called with a filename should closed the file.
"""
# We need to inject a modified open() builtin into the images module
# that checks if the file was closed properly if the function is
# called with a filename instead of an file object.
# get_image_dimensions will call our catching_open instead of the
# regular builtin one.
class FileWrapper(object):
_closed = []
def __init__(self, f):
self.f = f
def __getattr__(self, name):
return getattr(self.f, name)
def close(self):
self._closed.append(True)
self.f.close()
def catching_open(*args):
return FileWrapper(open(*args))
images.open = catching_open
try:
images.get_image_dimensions(os.path.join(os.path.dirname(upath(__file__)), "test1.png"))
finally:
del images.open
self.assertTrue(FileWrapper._closed)
class InconsistentGetImageDimensionsBug(unittest.TestCase):
"""
Test that get_image_dimensions() works properly after various calls
using a file handler (#11158)
"""
@unittest.skipUnless(Image, "Pillow/PIL not installed")
def test_multiple_calls(self):
"""
Multiple calls of get_image_dimensions() should return the same size.
"""
img_path = os.path.join(os.path.dirname(upath(__file__)), "test.png")
with open(img_path, 'rb') as fh:
image = images.ImageFile(fh)
image_pil = Image.open(fh)
size_1 = images.get_image_dimensions(image)
size_2 = images.get_image_dimensions(image)
self.assertEqual(image_pil.size, size_1)
self.assertEqual(size_1, size_2)
@unittest.skipUnless(Image, "Pillow/PIL not installed")
def test_bug_19457(self):
"""
Regression test for #19457
get_image_dimensions fails on some pngs, while Image.size is working good on them
"""
img_path = os.path.join(os.path.dirname(upath(__file__)), "magic.png")
try:
size = images.get_image_dimensions(img_path)
except zlib.error:
self.fail("Exception raised from get_image_dimensions().")
with open(img_path, 'rb') as fh:
self.assertEqual(size, Image.open(fh).size)
class FileMoveSafeTests(unittest.TestCase):
def test_file_move_overwrite(self):
handle_a, self.file_a = tempfile.mkstemp(dir=os.environ['DJANGO_TEST_TEMP_DIR'])
handle_b, self.file_b = tempfile.mkstemp(dir=os.environ['DJANGO_TEST_TEMP_DIR'])
# file_move_safe should raise an IOError exception if destination file exists and allow_overwrite is False
self.assertRaises(IOError, lambda: file_move_safe(self.file_a, self.file_b, allow_overwrite=False))
# should allow it and continue on if allow_overwrite is True
self.assertIsNone(file_move_safe(self.file_a, self.file_b, allow_overwrite=True))
os.close(handle_a)
os.close(handle_b)
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