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327 lines
12 KiB
Python
327 lines
12 KiB
Python
import gzip
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import os
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import struct
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import tempfile
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import unittest
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from io import BytesIO, StringIO, TextIOWrapper
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from django.core.files import File
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from django.core.files.base import ContentFile
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from django.core.files.move import file_move_safe
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from django.core.files.temp import NamedTemporaryFile
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from django.core.files.uploadedfile import SimpleUploadedFile, UploadedFile
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from django.test import mock
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from django.utils import six
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from django.utils._os import upath
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try:
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from PIL import Image
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except ImportError:
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Image = None
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else:
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from django.core.files import images
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class FileTests(unittest.TestCase):
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def test_unicode_uploadedfile_name(self):
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uf = UploadedFile(name='¿Cómo?', content_type='text')
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self.assertIs(type(repr(uf)), str)
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def test_unicode_file_name(self):
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f = File(None, 'djángö')
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self.assertIs(type(repr(f)), str)
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def test_context_manager(self):
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orig_file = tempfile.TemporaryFile()
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base_file = File(orig_file)
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with base_file as f:
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self.assertIs(base_file, f)
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self.assertFalse(f.closed)
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self.assertTrue(f.closed)
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self.assertTrue(orig_file.closed)
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def test_namedtemporaryfile_closes(self):
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"""
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The symbol django.core.files.NamedTemporaryFile is assigned as
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a different class on different operating systems. In
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any case, the result should minimally mock some of the API of
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tempfile.NamedTemporaryFile from the Python standard library.
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"""
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tempfile = NamedTemporaryFile()
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self.assertTrue(hasattr(tempfile, "closed"))
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self.assertFalse(tempfile.closed)
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tempfile.close()
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self.assertTrue(tempfile.closed)
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def test_file_mode(self):
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# Should not set mode to None if it is not present.
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# See #14681, stdlib gzip module crashes if mode is set to None
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file = SimpleUploadedFile("mode_test.txt", b"content")
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self.assertFalse(hasattr(file, 'mode'))
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gzip.GzipFile(fileobj=file)
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def test_file_iteration(self):
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"""
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File objects should yield lines when iterated over.
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Refs #22107.
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"""
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file = File(BytesIO(b'one\ntwo\nthree'))
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self.assertEqual(list(file), [b'one\n', b'two\n', b'three'])
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def test_file_iteration_windows_newlines(self):
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"""
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#8149 - File objects with \r\n line endings should yield lines
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when iterated over.
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"""
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f = File(BytesIO(b'one\r\ntwo\r\nthree'))
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self.assertEqual(list(f), [b'one\r\n', b'two\r\n', b'three'])
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def test_file_iteration_mac_newlines(self):
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"""
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#8149 - File objects with \r line endings should yield lines
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when iterated over.
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"""
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f = File(BytesIO(b'one\rtwo\rthree'))
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self.assertEqual(list(f), [b'one\r', b'two\r', b'three'])
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def test_file_iteration_mixed_newlines(self):
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f = File(BytesIO(b'one\rtwo\nthree\r\nfour'))
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self.assertEqual(list(f), [b'one\r', b'two\n', b'three\r\n', b'four'])
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def test_file_iteration_with_unix_newline_at_chunk_boundary(self):
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f = File(BytesIO(b'one\ntwo\nthree'))
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# Set chunk size to create a boundary after \n:
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# b'one\n...
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# ^
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f.DEFAULT_CHUNK_SIZE = 4
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self.assertEqual(list(f), [b'one\n', b'two\n', b'three'])
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def test_file_iteration_with_windows_newline_at_chunk_boundary(self):
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f = File(BytesIO(b'one\r\ntwo\r\nthree'))
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# Set chunk size to create a boundary between \r and \n:
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# b'one\r\n...
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# ^
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f.DEFAULT_CHUNK_SIZE = 4
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self.assertEqual(list(f), [b'one\r\n', b'two\r\n', b'three'])
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def test_file_iteration_with_mac_newline_at_chunk_boundary(self):
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f = File(BytesIO(b'one\rtwo\rthree'))
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# Set chunk size to create a boundary after \r:
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# b'one\r...
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# ^
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f.DEFAULT_CHUNK_SIZE = 4
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self.assertEqual(list(f), [b'one\r', b'two\r', b'three'])
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def test_file_iteration_with_text(self):
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f = File(StringIO('one\ntwo\nthree'))
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self.assertEqual(list(f), ['one\n', 'two\n', 'three'])
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def test_readable(self):
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with tempfile.TemporaryFile() as temp, File(temp, name='something.txt') as test_file:
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self.assertTrue(test_file.readable())
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self.assertFalse(test_file.readable())
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def test_writable(self):
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with tempfile.TemporaryFile() as temp, File(temp, name='something.txt') as test_file:
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self.assertTrue(test_file.writable())
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self.assertFalse(test_file.writable())
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with tempfile.TemporaryFile('rb') as temp, File(temp, name='something.txt') as test_file:
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self.assertFalse(test_file.writable())
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def test_seekable(self):
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with tempfile.TemporaryFile() as temp, File(temp, name='something.txt') as test_file:
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self.assertTrue(test_file.seekable())
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self.assertFalse(test_file.seekable())
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def test_io_wrapper(self):
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content = "vive l'été\n"
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with tempfile.TemporaryFile() as temp, File(temp, name='something.txt') as test_file:
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test_file.write(content.encode('utf-8'))
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test_file.seek(0)
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wrapper = TextIOWrapper(test_file, 'utf-8', newline='\n')
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self.assertEqual(wrapper.read(), content)
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# The following seek() call is required on Windows Python 2 when
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# switching from reading to writing.
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wrapper.seek(0, 2)
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wrapper.write(content)
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wrapper.seek(0)
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self.assertEqual(wrapper.read(), content * 2)
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test_file = wrapper.detach()
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test_file.seek(0)
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self.assertEqual(test_file.read(), (content * 2).encode('utf-8'))
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class NoNameFileTestCase(unittest.TestCase):
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"""
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Other examples of unnamed files may be tempfile.SpooledTemporaryFile or
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urllib.urlopen()
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"""
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def test_noname_file_default_name(self):
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self.assertIsNone(File(BytesIO(b'A file with no name')).name)
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def test_noname_file_get_size(self):
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self.assertEqual(File(BytesIO(b'A file with no name')).size, 19)
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class ContentFileTestCase(unittest.TestCase):
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def test_content_file_default_name(self):
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self.assertIsNone(ContentFile(b"content").name)
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def test_content_file_custom_name(self):
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"""
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The constructor of ContentFile accepts 'name' (#16590).
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"""
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name = "I can have a name too!"
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self.assertEqual(ContentFile(b"content", name=name).name, name)
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def test_content_file_input_type(self):
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"""
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ContentFile can accept both bytes and unicode and that the
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retrieved content is of the same type.
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"""
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self.assertIsInstance(ContentFile(b"content").read(), bytes)
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self.assertIsInstance(ContentFile("español").read(), six.text_type)
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class DimensionClosingBug(unittest.TestCase):
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"""
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get_image_dimensions() properly closes files (#8817)
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"""
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@unittest.skipUnless(Image, "Pillow not installed")
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def test_not_closing_of_files(self):
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"""
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Open files passed into get_image_dimensions() should stay opened.
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"""
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empty_io = BytesIO()
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try:
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images.get_image_dimensions(empty_io)
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finally:
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self.assertTrue(not empty_io.closed)
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@unittest.skipUnless(Image, "Pillow not installed")
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def test_closing_of_filenames(self):
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"""
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get_image_dimensions() called with a filename should closed the file.
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"""
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# We need to inject a modified open() builtin into the images module
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# that checks if the file was closed properly if the function is
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# called with a filename instead of an file object.
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# get_image_dimensions will call our catching_open instead of the
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# regular builtin one.
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class FileWrapper(object):
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_closed = []
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def __init__(self, f):
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self.f = f
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def __getattr__(self, name):
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return getattr(self.f, name)
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def close(self):
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self._closed.append(True)
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self.f.close()
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def catching_open(*args):
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return FileWrapper(open(*args))
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images.open = catching_open
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try:
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images.get_image_dimensions(os.path.join(os.path.dirname(upath(__file__)), "test1.png"))
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finally:
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del images.open
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self.assertTrue(FileWrapper._closed)
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class InconsistentGetImageDimensionsBug(unittest.TestCase):
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"""
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get_image_dimensions() works properly after various calls
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using a file handler (#11158)
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"""
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@unittest.skipUnless(Image, "Pillow not installed")
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def test_multiple_calls(self):
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"""
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Multiple calls of get_image_dimensions() should return the same size.
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"""
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img_path = os.path.join(os.path.dirname(upath(__file__)), "test.png")
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with open(img_path, 'rb') as fh:
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image = images.ImageFile(fh)
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image_pil = Image.open(fh)
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size_1 = images.get_image_dimensions(image)
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size_2 = images.get_image_dimensions(image)
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self.assertEqual(image_pil.size, size_1)
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self.assertEqual(size_1, size_2)
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@unittest.skipUnless(Image, "Pillow not installed")
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def test_bug_19457(self):
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"""
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Regression test for #19457
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get_image_dimensions fails on some pngs, while Image.size is working good on them
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"""
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img_path = os.path.join(os.path.dirname(upath(__file__)), "magic.png")
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size = images.get_image_dimensions(img_path)
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with open(img_path, 'rb') as fh:
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self.assertEqual(size, Image.open(fh).size)
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@unittest.skipUnless(Image, "Pillow not installed")
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class GetImageDimensionsTests(unittest.TestCase):
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def test_invalid_image(self):
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"""
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get_image_dimensions() should return (None, None) for the dimensions of
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invalid images (#24441).
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brokenimg.png is not a valid image and it has been generated by:
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$ echo "123" > brokenimg.png
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"""
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img_path = os.path.join(os.path.dirname(upath(__file__)), "brokenimg.png")
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with open(img_path, 'rb') as fh:
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size = images.get_image_dimensions(fh)
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self.assertEqual(size, (None, None))
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def test_valid_image(self):
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"""
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get_image_dimensions() should catch struct.error while feeding the PIL
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Image parser (#24544).
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Emulates the Parser feed error. Since the error is raised on every feed
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attempt, the resulting image size should be invalid: (None, None).
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"""
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img_path = os.path.join(os.path.dirname(upath(__file__)), "test.png")
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with mock.patch('PIL.ImageFile.Parser.feed', side_effect=struct.error):
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with open(img_path, 'rb') as fh:
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size = images.get_image_dimensions(fh)
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self.assertEqual(size, (None, None))
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class FileMoveSafeTests(unittest.TestCase):
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def test_file_move_overwrite(self):
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handle_a, self.file_a = tempfile.mkstemp()
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handle_b, self.file_b = tempfile.mkstemp()
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# file_move_safe should raise an IOError exception if destination file exists and allow_overwrite is False
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with self.assertRaises(IOError):
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file_move_safe(self.file_a, self.file_b, allow_overwrite=False)
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# should allow it and continue on if allow_overwrite is True
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self.assertIsNone(file_move_safe(self.file_a, self.file_b, allow_overwrite=True))
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os.close(handle_a)
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os.close(handle_b)
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class SpooledTempTests(unittest.TestCase):
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def test_in_memory_spooled_temp(self):
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with tempfile.SpooledTemporaryFile() as temp:
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temp.write(b"foo bar baz quux\n")
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django_file = File(temp, name="something.txt")
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self.assertEqual(django_file.size, 17)
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def test_written_spooled_temp(self):
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with tempfile.SpooledTemporaryFile(max_size=4) as temp:
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temp.write(b"foo bar baz quux\n")
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django_file = File(temp, name="something.txt")
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self.assertEqual(django_file.size, 17)
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