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# -*- coding: utf-8 -*-
# ******************************************************************************
#
# Copyright (C) 2009 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>
#
# ******************************************************************************
import unittest
from pyexiv2 import ImageMetadata, ExifTag, IptcTag, XmpTag
import datetime
class ImageMock(object):
def __init__(self, filename):
self.filename = filename
self.read = False
self.written = False
self.tags = {'exif': {}, 'iptc': {}, 'xmp': {}}
def readMetadata(self):
self.read = True
def writeMetadata(self):
self.written = True
def exifKeys(self):
return self.tags['exif'].keys()
def getExifTag(self, key):
return self.tags['exif'][key]
def setExifTag(self, key, value):
self.tags['exif'][key] = value
def deleteExifTag(self, key):
try:
del self.tags['exif'][key]
except KeyError:
pass
def iptcKeys(self):
return self.tags['iptc'].keys()
def getIptcTag(self, key):
return self.tags['iptc'][key]
def xmpKeys(self):
return self.tags['xmp'].keys()
def getXmpTag(self, key):
return self.tags['xmp'][key]
class TestImageMetadata(unittest.TestCase):
def setUp(self):
self.metadata = ImageMetadata('nofile')
self.metadata._instantiate_image = lambda filename: ImageMock(filename)
def _set_exif_tags(self):
tags = {}
tags['Exif.Image.Make'] = \
('Exif.Image.Make', 'Make', 'Manufacturer', 'blabla', 'Ascii',
'EASTMAN KODAK COMPANY', 'EASTMAN KODAK COMPANY')
tags['Exif.Image.DateTime'] = \
('Exif.Image.DateTime', 'DateTime', 'Date and Time', 'blabla',
'Ascii', '2009:02:09 13:33:20', '2009:02:09 13:33:20')
tags['Exif.Photo.ExifVersion'] = \
('Exif.Photo.ExifVersion', 'ExifVersion', 'Exif Version', 'blabla',
'Undefined', '48 50 50 49 ', '2.21')
self.metadata._image.tags['exif'] = tags
def _set_iptc_tags(self):
tags = {}
tags['Iptc.Application2.Caption'] = \
('Iptc.Application2.Caption', 'Caption', 'Caption',
'A textual description of the object data.', 'String',
['blabla'])
tags['Iptc.Application2.DateCreated'] = \
('Iptc.Application2.DateCreated', 'DateCreated', 'Date Created',
'Represented in the form CCYYMMDD to designate the date the ' \
'intellectual content of the object data was created rather ' \
'than the date of the creation of the physical representation. ' \
'Follows ISO 8601 standard.', 'Date', ['2004-07-13'])
self.metadata._image.tags['iptc'] = tags
def _set_xmp_tags(self):
tags = {}
tags['Xmp.dc.format'] = \
('Xmp.dc.format', 'format', 'Format', 'The file format used when ' \
'saving the resource. Tools and applications should set this ' \
'property to the save format of the data. It may include ' \
'appropriate qualifiers.', 'MIMEType', ['image/jpeg'])
tags['Xmp.dc.subject'] = \
('Xmp.dc.subject', 'subject', 'Subject', 'An unordered array of ' \
'descriptive phrases or keywords that specify the topic of the ' \
'content of the resource.', 'bag Text', ['image, test, pyexiv2'])
tags['Xmp.xmp.CreateDate'] = \
('Xmp.xmp.CreateDate', 'CreateDate', 'Create Date',
'The date and time the resource was originally created.', 'Date',
['2005-09-07T15:07:40-07:00'])
tags['Xmp.xmpMM.DocumentID'] = \
('Xmp.xmpMM.DocumentID', 'DocumentID', 'Document ID',
'The common identifier for all versions and renditions of a ' \
'document. It should be based on a UUID; see Document and ' \
'Instance IDs below.', 'URI',
['uuid:9A3B7F52214211DAB6308A7391270C13'])
self.metadata._image.tags['xmp'] = tags
def test_read(self):
self.assertEqual(self.metadata._image, None)
self.metadata.read()
self.failIfEqual(self.metadata._image, None)
self.failUnless(self.metadata._image.read)
def test_write(self):
self.metadata.read()
self.failIf(self.metadata._image.written)
self.metadata.write()
self.failUnless(self.metadata._image.written)
def test_exif_keys(self):
self.metadata.read()
self._set_exif_tags()
self.assertEqual(self.metadata._keys['exif'], None)
keys = self.metadata.exif_keys
self.assertEqual(len(keys), 3)
self.assertEqual(self.metadata._keys['exif'], keys)
def test_get_exif_tag(self):
self.metadata.read()
self._set_exif_tags()
self.assertEqual(self.metadata._tags['exif'], {})
# Get an existing tag
key = 'Exif.Image.Make'
tag = self.metadata._get_exif_tag(key)
self.assertEqual(type(tag), ExifTag)
self.assertEqual(tag.metadata, self.metadata)
self.assertEqual(self.metadata._tags['exif'][key], tag)
# Try to get an nonexistent tag
key = 'Exif.Photo.Sharpness'
self.failUnlessRaises(KeyError, self.metadata._get_exif_tag, key)
def test_set_exif_tag_wrong(self):
self.metadata.read()
self._set_exif_tags()
self.assertEqual(self.metadata._tags['exif'], {})
# Try to set a tag with wrong type
key = 'Exif.Image.Make'
value = 'Not an exif tag'
self.failUnlessRaises(TypeError, self.metadata._set_exif_tag, key, value)
self.assertEqual(self.metadata._tags['exif'], {})
def test_set_exif_tag_create(self):
self.metadata.read()
self._set_exif_tags()
self.assertEqual(self.metadata._tags['exif'], {})
# Create a new tag
tag = ExifTag('Exif.Thumbnail.Orientation', 'Orientation',
'Orientation', 'The image orientation viewed in terms ' \
'of rows and columns.', 'Short', '1', 'top, left')
self.assertEqual(tag.metadata, None)
self.metadata._set_exif_tag(tag)
self.assertEqual(tag.metadata, self.metadata)
self.assertEqual(self.metadata._tags['exif'], {tag.key: tag})
self.assert_(self.metadata._image.tags['exif'].has_key(tag.key))
self.assertEqual(self.metadata._image.tags['exif'][tag.key],
tag.raw_value)
def test_set_exif_tag_overwrite(self):
self.metadata.read()
self._set_exif_tags()
self.assertEqual(self.metadata._tags['exif'], {})
# Overwrite an existing tag
tag = ExifTag('Exif.Image.DateTime', 'DateTime', 'Date and Time',
'blabla', 'Ascii', '2009:03:20 20:32:00',
'2009:03:20 20:32:00')
self.assertEqual(tag.metadata, None)
self.metadata._set_exif_tag(tag)
self.assertEqual(tag.metadata, self.metadata)
self.assertEqual(self.metadata._tags['exif'], {tag.key: tag})
self.assert_(self.metadata._image.tags['exif'].has_key(tag.key))
self.assertEqual(self.metadata._image.tags['exif'][tag.key],
tag.raw_value)
def test_set_exif_tag_overwrite_already_cached(self):
self.metadata.read()
self._set_exif_tags()
self.assertEqual(self.metadata._tags['exif'], {})
# Overwrite an existing tag already cached
key = 'Exif.Photo.ExifVersion'
tag = self.metadata._get_exif_tag(key)
self.assertEqual(self.metadata._tags['exif'][key], tag)
new_tag = ExifTag(key, 'ExifVersion', 'Exif Version', 'blabla',
'Undefined', '48 50 50 48 ', '2.20')
self.assertEqual(new_tag.metadata, None)
self.metadata._set_exif_tag(new_tag)
self.assertEqual(new_tag.metadata, self.metadata)
self.assertEqual(self.metadata._tags['exif'], {key: new_tag})
self.assert_(self.metadata._image.tags['exif'].has_key(key))
# Special case where the formatted value is used instead of the raw
# value.
self.assertEqual(self.metadata._image.tags['exif'][key], new_tag.fvalue)
def test_set_exif_tag_value_inexistent(self):
self.metadata.read()
self._set_exif_tags()
key = 'Exif.Photo.ExposureTime'
value = '1/500'
self.failUnlessRaises(KeyError, self.metadata._set_exif_tag_value,
key, value)
def test_set_exif_tag_value_wrong_type(self):
self.metadata.read()
self._set_exif_tags()
key = 'Exif.Image.DateTime'
value = datetime.datetime(2009, 3, 24, 9, 37, 36)
self.failUnlessRaises(TypeError, self.metadata._set_exif_tag_value,
key, value)
def test_set_exif_tag_value(self):
self.metadata.read()
self._set_exif_tags()
key = 'Exif.Image.DateTime'
tag = self.metadata._get_exif_tag(key)
value = '2009:03:24 09:37:36'
self.failIfEqual(self.metadata._image.tags['exif'][key], value)
self.metadata._set_exif_tag_value(key, value)
self.assertEqual(self.metadata._image.tags['exif'][key], value)
def test_delete_exif_tag_inexistent(self):
self.metadata.read()
self._set_exif_tags()
key = 'Exif.Image.Artist'
self.failUnlessRaises(KeyError, self.metadata._delete_exif_tag, key)
def test_delete_exif_tag_not_cached(self):
self.metadata.read()
self._set_exif_tags()
key = 'Exif.Image.DateTime'
self.assertEqual(self.metadata._tags['exif'], {})
self.assert_(self.metadata._image.tags['exif'].has_key(key))
self.metadata._delete_exif_tag(key)
self.assertEqual(self.metadata._tags['exif'], {})
self.failIf(self.metadata._image.tags['exif'].has_key(key))
def test_delete_exif_tag_cached(self):
self.metadata.read()
self._set_exif_tags()
key = 'Exif.Image.DateTime'
self.assert_(self.metadata._image.tags['exif'].has_key(key))
tag = self.metadata._get_exif_tag(key)
self.assertEqual(self.metadata._tags['exif'][key], tag)
self.metadata._delete_exif_tag(key)
self.assertEqual(self.metadata._tags['exif'], {})
self.failIf(self.metadata._image.tags['exif'].has_key(key))
def test_iptc_keys(self):
self.metadata.read()
self._set_iptc_tags()
self.assertEqual(self.metadata._keys['iptc'], None)
keys = self.metadata.iptc_keys
self.assertEqual(len(keys), 2)
self.assertEqual(self.metadata._keys['iptc'], keys)
def test_get_iptc_tag(self):
self.metadata.read()
self._set_iptc_tags()
self.assertEqual(self.metadata._tags['iptc'], {})
# Get an existing tag
key = 'Iptc.Application2.DateCreated'
tag = self.metadata._get_iptc_tag(key)
self.assertEqual(type(tag), IptcTag)
self.assertEqual(tag.metadata, self.metadata)
self.assertEqual(self.metadata._tags['iptc'][key], tag)
# Try to get an nonexistent tag
key = 'Iptc.Application2.Copyright'
self.failUnlessRaises(KeyError, self.metadata._get_iptc_tag, key)
def test_xmp_keys(self):
self.metadata.read()
self._set_xmp_tags()
self.assertEqual(self.metadata._keys['xmp'], None)
keys = self.metadata.xmp_keys
self.assertEqual(len(keys), 4)
self.assertEqual(self.metadata._keys['xmp'], keys)
def test_get_xmp_tag(self):
self.metadata.read()
self._set_xmp_tags()
self.assertEqual(self.metadata._tags['xmp'], {})
# Get an existing tag
key = 'Xmp.dc.subject'
tag = self.metadata._get_xmp_tag(key)
self.assertEqual(type(tag), XmpTag)
self.assertEqual(tag.metadata, self.metadata)
self.assertEqual(self.metadata._tags['xmp'][key], tag)
# Try to get an nonexistent tag
key = 'Xmp.xmp.Label'
self.failUnlessRaises(KeyError, self.metadata._get_xmp_tag, key)
def test_get(self):
self.metadata.read()
self._set_exif_tags()
self._set_iptc_tags()
self._set_xmp_tags()
# Get existing tags
key = 'Exif.Photo.ExifVersion'
tag = self.metadata.get(key)
self.assertEqual(type(tag), ExifTag)
key = 'Iptc.Application2.Caption'
tag = self.metadata.get(key)
self.assertEqual(type(tag), IptcTag)
key = 'Xmp.xmp.CreateDate'
tag = self.metadata.get(key)
self.assertEqual(type(tag), XmpTag)
# Try to get nonexistent tags
keys = ('Exif.Image.SamplesPerPixel', 'Iptc.Application2.FixtureId',
'Xmp.xmp.Rating', 'Wrong.Noluck.Raise')
for key in keys:
self.failUnlessRaises(KeyError, self.metadata.get, key)
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