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import os
from io import UnsupportedOperation
from pilkit.exceptions import UnknownFormat, UnknownExtension
from pilkit.lib import Image
from pilkit.utils import (extension_to_format, format_to_extension, FileWrapper,
save_image, prepare_image, quiet)
from mock import Mock, patch
from nose.tools import eq_, raises, ok_
from tempfile import NamedTemporaryFile
from .utils import create_image
def test_extension_to_format():
eq_(extension_to_format('.jpeg'), 'JPEG')
eq_(extension_to_format('.rgba'), 'SGI')
def test_format_to_extension_no_init():
eq_(format_to_extension('PNG'), '.png')
eq_(format_to_extension('ICO'), '.ico')
@raises(UnknownFormat)
def test_unknown_format():
format_to_extension('TXT')
@raises(UnknownExtension)
def test_unknown_extension():
extension_to_format('.txt')
def test_default_extension():
"""
Ensure default extensions are honored.
Since PIL's ``Image.EXTENSION`` lists ``'.jpe'`` before the more common
JPEG extensions, it would normally be the extension we'd get for that
format. ``pilkit.utils.DEFAULT_EXTENSIONS`` is our way of specifying which
extensions we'd prefer, and this tests to make sure it's working.
"""
eq_(format_to_extension('JPEG'), '.jpg')
@raises(AttributeError)
def test_filewrapper():
class K(object):
def fileno(self):
raise UnsupportedOperation
FileWrapper(K()).fileno()
def test_save_with_filename():
"""
Test that ``save_image`` accepts filename strings (not just file objects).
This is a test for GH-8.
"""
im = create_image()
outfile = NamedTemporaryFile()
save_image(im, outfile.name, 'JPEG')
outfile.close()
def test_format_normalization():
"""
Make sure formats are normalized by ``prepare_image()``.
See https://github.com/matthewwithanm/django-imagekit/issues/262
"""
im = Image.new('RGBA', (100, 100))
ok_('transparency' in prepare_image(im, 'gIF')[1])
def test_quiet():
"""
Make sure the ``quiet`` util doesn't error if devnull is unwriteable.
See https://github.com/matthewwithanm/django-imagekit/issues/294
"""
mocked = Mock(side_effect=OSError)
with patch.object(os, 'open', mocked):
with quiet():
pass
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