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# -*- coding: utf-8 -*-
# ******************************************************************************
#
# Copyright (C) 2010 Olivier Tilloy <olivier@tilloy.net>
#
# This file is part of the pyexiv2 distribution.
#
# pyexiv2 is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# pyexiv2 is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with pyexiv2; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301 USA.
#
# Author: Olivier Tilloy <olivier@tilloy.net>
#
# ******************************************************************************
from pyexiv2.metadata import ImageMetadata
import unittest
import testutils
import os
import tempfile
from testutils import EMPTY_JPG_DATA
class TestUserCommentReadWrite(unittest.TestCase):
checksums = {
'usercomment-ascii.jpg': 'ad29ac65fb6f63c8361aaed6cb02f8c7',
'usercomment-unicode-ii.jpg': '13b7cc09129a8677f2cf18634f5abd3c',
'usercomment-unicode-mm.jpg': '7addfed7823c556ba489cd4ab2037200',
}
def _read_image(self, filename):
filepath = testutils.get_absolute_file_path(os.path.join('data', filename))
self.assert_(testutils.CheckFileSum(filepath, self.checksums[filename]))
m = ImageMetadata(filepath)
m.read()
return m
def _expected_raw_value(self, endianness, value):
from pyexiv2 import __exiv2_version__
if __exiv2_version__ >= '0.20':
return value
else:
encodings = {'ii': 'utf-16le', 'mm': 'utf-16be'}
return value.decode('utf-8').encode(encodings[endianness])
def test_read_ascii(self):
m = self._read_image('usercomment-ascii.jpg')
tag = m['Exif.Photo.UserComment']
self.assertEqual(tag.raw_value, 'charset="Ascii" deja vu')
self.assertEqual(tag.value, u'deja vu')
def test_read_unicode_little_endian(self):
m = self._read_image('usercomment-unicode-ii.jpg')
tag = m['Exif.Photo.UserComment']
self.assertEqual(tag.raw_value, 'charset="Unicode" %s' % self._expected_raw_value('ii', 'déjà vu'))
self.assertEqual(tag.value, u'déjà vu')
def test_read_unicode_big_endian(self):
m = self._read_image('usercomment-unicode-mm.jpg')
tag = m['Exif.Photo.UserComment']
self.assertEqual(tag.raw_value, 'charset="Unicode" %s' % self._expected_raw_value('mm', 'déjà vu'))
self.assertEqual(tag.value, u'déjà vu')
def test_write_ascii(self):
m = self._read_image('usercomment-ascii.jpg')
tag = m['Exif.Photo.UserComment']
tag.value = 'foo bar'
self.assertEqual(tag.raw_value, 'charset="Ascii" foo bar')
self.assertEqual(tag.value, u'foo bar')
def test_write_unicode_over_ascii(self):
m = self._read_image('usercomment-ascii.jpg')
tag = m['Exif.Photo.UserComment']
tag.value = u'déjà vu'
self.assertEqual(tag.raw_value, 'déjà vu')
self.assertEqual(tag.value, u'déjà vu')
def test_write_unicode_little_endian(self):
m = self._read_image('usercomment-unicode-ii.jpg')
tag = m['Exif.Photo.UserComment']
tag.value = u'DÉJÀ VU'
self.assertEqual(tag.raw_value, 'charset="Unicode" %s' % self._expected_raw_value('ii', 'DÉJÀ VU'))
self.assertEqual(tag.value, u'DÉJÀ VU')
def test_write_unicode_big_endian(self):
m = self._read_image('usercomment-unicode-mm.jpg')
tag = m['Exif.Photo.UserComment']
tag.value = u'DÉJÀ VU'
self.assertEqual(tag.raw_value, 'charset="Unicode" %s' % self._expected_raw_value('mm', 'DÉJÀ VU'))
self.assertEqual(tag.value, u'DÉJÀ VU')
class TestUserCommentAdd(unittest.TestCase):
def setUp(self):
# Create an empty image file
fd, self.pathname = tempfile.mkstemp(suffix='.jpg')
os.write(fd, EMPTY_JPG_DATA)
os.close(fd)
def tearDown(self):
os.remove(self.pathname)
def _test_add_comment(self, value):
metadata = ImageMetadata(self.pathname)
metadata.read()
key = 'Exif.Photo.UserComment'
metadata[key] = value
metadata.write()
metadata = ImageMetadata(self.pathname)
metadata.read()
self.assert_(key in metadata.exif_keys)
tag = metadata[key]
self.assertEqual(tag.value, value)
def test_add_comment_ascii(self):
self._test_add_comment('deja vu')
def test_add_comment_unicode(self):
self._test_add_comment(u'déjà vu')
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