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Diffstat (limited to 'test/metadata.py')
| -rw-r--r-- | test/metadata.py | 692 |
1 files changed, 692 insertions, 0 deletions
diff --git a/test/metadata.py b/test/metadata.py new file mode 100644 index 0000000..af8646f --- /dev/null +++ b/test/metadata.py @@ -0,0 +1,692 @@ +# -*- 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.metadata import ImageMetadata +from pyexiv2.exif import ExifTag +from pyexiv2.iptc import IptcTag +from pyexiv2.xmp import 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 setExifTagValue(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 setIptcTagValues(self, key, values): + self.tags['iptc'][key] = values + + def deleteIptcTag(self, key): + try: + del self.tags['iptc'][key] + except KeyError: + pass + + def xmpKeys(self): + return self.tags['xmp'].keys() + + def getXmpTag(self, key): + return self.tags['xmp'][key] + + def setXmpTagValue(self, key, value): + self.tags['xmp'][key] = value + + def deleteXmpTag(self, key): + try: + del self.tags['xmp'][key] + except KeyError: + pass + + +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 + + ###################### + # Test general methods + ###################### + + 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) + + ########################### + # Test EXIF-related methods + ########################### + + 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 + tag = 'Not an exif tag' + self.failUnlessRaises(TypeError, self.metadata._set_exif_tag, tag) + 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)) + + ########################### + # Test IPTC-related methods + ########################### + + 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_set_iptc_tag_wrong(self): + self.metadata.read() + self._set_iptc_tags() + self.assertEqual(self.metadata._tags['iptc'], {}) + # Try to set a tag with wrong type + tag = 'Not an iptc tag' + self.failUnlessRaises(TypeError, self.metadata._set_iptc_tag, tag) + self.assertEqual(self.metadata._tags['iptc'], {}) + + def test_set_iptc_tag_create(self): + self.metadata.read() + self._set_iptc_tags() + self.assertEqual(self.metadata._tags['iptc'], {}) + # Create a new tag + tag = IptcTag('Iptc.Application2.Writer', 'Writer', 'Writer', + 'Identification of the name of the person involved in ' \ + 'the writing, editing or correcting the object data or ' \ + 'caption/abstract.', 'String', ['Nobody']) + self.assertEqual(tag.metadata, None) + self.metadata._set_iptc_tag(tag) + self.assertEqual(tag.metadata, self.metadata) + self.assertEqual(self.metadata._tags['iptc'], {tag.key: tag}) + self.assert_(self.metadata._image.tags['iptc'].has_key(tag.key)) + self.assertEqual(self.metadata._image.tags['iptc'][tag.key], + tag.raw_value) + + def test_set_iptc_tag_overwrite(self): + self.metadata.read() + self._set_iptc_tags() + self.assertEqual(self.metadata._tags['iptc'], {}) + # Overwrite an existing tag + tag = IptcTag('Iptc.Application2.Caption', 'Caption', 'Caption', + 'A textual description of the object data.', 'String', + ['A picture.']) + self.assertEqual(tag.metadata, None) + self.metadata._set_iptc_tag(tag) + self.assertEqual(tag.metadata, self.metadata) + self.assertEqual(self.metadata._tags['iptc'], {tag.key: tag}) + self.assert_(self.metadata._image.tags['iptc'].has_key(tag.key)) + self.assertEqual(self.metadata._image.tags['iptc'][tag.key], + tag.raw_value) + + def test_set_iptc_tag_overwrite_already_cached(self): + self.metadata.read() + self._set_iptc_tags() + self.assertEqual(self.metadata._tags['iptc'], {}) + # Overwrite an existing tag already cached + key = 'Iptc.Application2.Caption' + tag = self.metadata._get_iptc_tag(key) + self.assertEqual(self.metadata._tags['iptc'][key], tag) + new_tag = IptcTag(key, 'Caption', 'Caption', + 'A textual description of the object data.', 'String', + ['A picture.']) + self.assertEqual(new_tag.metadata, None) + self.metadata._set_iptc_tag(new_tag) + self.assertEqual(new_tag.metadata, self.metadata) + self.assertEqual(self.metadata._tags['iptc'], {key: new_tag}) + self.assert_(self.metadata._image.tags['iptc'].has_key(key)) + self.assertEqual(self.metadata._image.tags['iptc'][key], + new_tag.raw_value) + + def test_set_iptc_tag_values_inexistent(self): + self.metadata.read() + self._set_iptc_tags() + key = 'Iptc.Application2.Urgency' + values = ['1'] + self.failUnlessRaises(KeyError, self.metadata._set_iptc_tag_values, + key, values) + + def test_set_iptc_tag_values_wrong_type(self): + self.metadata.read() + self._set_iptc_tags() + key = 'Iptc.Application2.DateCreated' + value = '20090324' + self.failUnlessRaises(TypeError, self.metadata._set_iptc_tag_values, + key, value) + values = [datetime.date(2009, 3, 24)] + self.failUnlessRaises(TypeError, self.metadata._set_iptc_tag_values, + key, values) + + def test_set_iptc_tag_values(self): + self.metadata.read() + self._set_iptc_tags() + key = 'Iptc.Application2.DateCreated' + tag = self.metadata._get_iptc_tag(key) + values = ['2009-04-07'] + self.failIfEqual(self.metadata._image.tags['iptc'][key], values) + self.metadata._set_iptc_tag_values(key, values) + self.assertEqual(self.metadata._image.tags['iptc'][key], values) + + def test_delete_iptc_tag_inexistent(self): + self.metadata.read() + self._set_iptc_tags() + key = 'Iptc.Application2.LocationCode' + self.failUnlessRaises(KeyError, self.metadata._delete_iptc_tag, key) + + def test_delete_iptc_tag_not_cached(self): + self.metadata.read() + self._set_iptc_tags() + key = 'Iptc.Application2.Caption' + self.assertEqual(self.metadata._tags['iptc'], {}) + self.assert_(self.metadata._image.tags['iptc'].has_key(key)) + self.metadata._delete_iptc_tag(key) + self.assertEqual(self.metadata._tags['iptc'], {}) + self.failIf(self.metadata._image.tags['iptc'].has_key(key)) + + def test_delete_iptc_tag_cached(self): + self.metadata.read() + self._set_iptc_tags() + key = 'Iptc.Application2.Caption' + self.assert_(self.metadata._image.tags['iptc'].has_key(key)) + tag = self.metadata._get_iptc_tag(key) + self.assertEqual(self.metadata._tags['iptc'][key], tag) + self.metadata._delete_iptc_tag(key) + self.assertEqual(self.metadata._tags['iptc'], {}) + self.failIf(self.metadata._image.tags['iptc'].has_key(key)) + + ########################## + # Test XMP-related methods + ########################## + + 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_set_xmp_tag_wrong(self): + self.metadata.read() + self._set_xmp_tags() + self.assertEqual(self.metadata._tags['xmp'], {}) + # Try to set a tag with wrong type + tag = 'Not an xmp tag' + self.failUnlessRaises(TypeError, self.metadata._set_xmp_tag, tag) + self.assertEqual(self.metadata._tags['xmp'], {}) + + def test_set_xmp_tag_create(self): + self.metadata.read() + self._set_xmp_tags() + self.assertEqual(self.metadata._tags['xmp'], {}) + # Create a new tag + tag = XmpTag('Xmp.dc.title', 'title', 'Title', 'The title of the ' \ + 'document, or the name given to the resource. Typically,' \ + ' it will be a name by which the resource is formally ' \ + 'known.', 'Lang Alt', + 'lang="x-default" This is not a title, ' \ + 'lang="fr-FR" Ceci n\'est pas un titre') + self.assertEqual(tag.metadata, None) + self.metadata._set_xmp_tag(tag) + self.assertEqual(tag.metadata, self.metadata) + self.assertEqual(self.metadata._tags['xmp'], {tag.key: tag}) + self.assert_(self.metadata._image.tags['xmp'].has_key(tag.key)) + self.assertEqual(self.metadata._image.tags['xmp'][tag.key], + tag.raw_value) + + def test_set_xmp_tag_overwrite(self): + self.metadata.read() + self._set_xmp_tags() + self.assertEqual(self.metadata._tags['xmp'], {}) + # Overwrite an existing tag + tag = XmpTag('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/png') + self.assertEqual(tag.metadata, None) + self.metadata._set_xmp_tag(tag) + self.assertEqual(tag.metadata, self.metadata) + self.assertEqual(self.metadata._tags['xmp'], {tag.key: tag}) + self.assert_(self.metadata._image.tags['xmp'].has_key(tag.key)) + self.assertEqual(self.metadata._image.tags['xmp'][tag.key], + tag.raw_value) + + def test_set_xmp_tag_overwrite_already_cached(self): + self.metadata.read() + self._set_xmp_tags() + self.assertEqual(self.metadata._tags['xmp'], {}) + # Overwrite an existing tag already cached + key = 'Xmp.xmp.CreateDate' + tag = self.metadata._get_xmp_tag(key) + self.assertEqual(self.metadata._tags['xmp'][key], tag) + new_tag = XmpTag(key, 'CreateDate', 'Create Date', + 'The date and time the resource was originally ' \ + 'created.', 'Date', '2009-04-21T20:07+01:00') + self.assertEqual(new_tag.metadata, None) + self.metadata._set_xmp_tag(new_tag) + self.assertEqual(new_tag.metadata, self.metadata) + self.assertEqual(self.metadata._tags['xmp'], {key: new_tag}) + self.assert_(self.metadata._image.tags['xmp'].has_key(key)) + self.assertEqual(self.metadata._image.tags['xmp'][key], + new_tag.raw_value) + + def test_set_xmp_tag_value_inexistent(self): + self.metadata.read() + self._set_xmp_tags() + key = 'Xmp.xmp.Nickname' + value = 'oSoMoN' + self.failUnlessRaises(KeyError, self.metadata._set_xmp_tag_value, + key, value) + + def test_set_xmp_tag_value_wrong_type(self): + self.metadata.read() + self._set_xmp_tags() + key = 'Xmp.xmp.CreateDate' + value = datetime.datetime(2009, 4, 21, 20, 11, 0) + self.failUnlessRaises(TypeError, self.metadata._set_xmp_tag_value, + key, value) + + def test_set_xmp_tag_value(self): + self.metadata.read() + self._set_xmp_tags() + key = 'Xmp.xmp.CreateDate' + tag = self.metadata._get_xmp_tag(key) + value = '2009-04-21T20:12:47+01:00' + self.failIfEqual(self.metadata._image.tags['xmp'][key], value) + self.metadata._set_xmp_tag_value(key, value) + self.assertEqual(self.metadata._image.tags['xmp'][key], value) + + def test_delete_xmp_tag_inexistent(self): + self.metadata.read() + self._set_xmp_tags() + key = 'Xmp.xmp.CreatorTool' + self.failUnlessRaises(KeyError, self.metadata._delete_xmp_tag, key) + + def test_delete_xmp_tag_not_cached(self): + self.metadata.read() + self._set_xmp_tags() + key = 'Xmp.dc.subject' + self.assertEqual(self.metadata._tags['xmp'], {}) + self.assert_(self.metadata._image.tags['xmp'].has_key(key)) + self.metadata._delete_xmp_tag(key) + self.assertEqual(self.metadata._tags['xmp'], {}) + self.failIf(self.metadata._image.tags['xmp'].has_key(key)) + + def test_delete_xmp_tag_cached(self): + self.metadata.read() + self._set_xmp_tags() + key = 'Xmp.dc.subject' + self.assert_(self.metadata._image.tags['xmp'].has_key(key)) + tag = self.metadata._get_xmp_tag(key) + self.assertEqual(self.metadata._tags['xmp'][key], tag) + self.metadata._delete_xmp_tag(key) + self.assertEqual(self.metadata._tags['xmp'], {}) + self.failIf(self.metadata._image.tags['xmp'].has_key(key)) + + ########################### + # Test dictionary interface + ########################### + + def test_getitem(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[key] + self.assertEqual(type(tag), ExifTag) + key = 'Iptc.Application2.Caption' + tag = self.metadata[key] + self.assertEqual(type(tag), IptcTag) + key = 'Xmp.xmp.CreateDate' + tag = self.metadata[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.__getitem__, key) + + def test_setitem(self): + self.metadata.read() + self._set_exif_tags() + self._set_iptc_tags() + self._set_xmp_tags() + # Set new tags + key = 'Exif.Photo.ExposureBiasValue' + tag = ExifTag(key, 'ExposureBiasValue', 'Exposure Bias', + 'The exposure bias. The units is the APEX value. ' \ + 'Ordinarily it is given in the range of -99.99 to 99.99.', + 'SRational', '0/3', '0') + self.metadata[key] = tag + self.failUnless(key in self.metadata._tags['exif']) + self.failUnlessEqual(self.metadata._tags['exif'][key], tag) + key = 'Iptc.Application2.City' + tag = IptcTag(key, 'City', 'City', 'Identifies city of object data ' \ + 'origin according to guidelines established by the ' \ + 'provider.', 'String', ['Barcelona']) + self.metadata[key] = tag + self.failUnless(key in self.metadata._tags['iptc']) + self.failUnlessEqual(self.metadata._tags['iptc'][key], tag) + key = 'Xmp.dc.description' + tag = XmpTag(key, 'description', 'Description', 'A textual ' \ + 'description of the content of the resource. Multiple ' \ + 'values may be present for different languages.', + 'Lang Alt', 'lang="x-default" Sunset picture.') + self.metadata[key] = tag + self.failUnless(key in self.metadata._tags['xmp']) + self.failUnlessEqual(self.metadata._tags['xmp'][key], tag) + # Replace existing tags + key = 'Exif.Photo.ExifVersion' + tag = ExifTag(key, 'ExifVersion', 'Exif Version', 'The version of ' \ + 'this standard supported. Nonexistence of this field is' \ + ' taken to mean nonconformance to the standard.', + 'Undefined', '48 50 50 48 ', '2.20') + self.metadata[key] = tag + self.failUnless(key in self.metadata._tags['exif']) + self.failUnlessEqual(self.metadata._tags['exif'][key], tag) + key = 'Iptc.Application2.Caption' + tag = IptcTag(key, 'Caption', 'Caption', 'A textual description of ' \ + 'the object data.', 'String', ['Sunset on Barcelona.']) + self.metadata[key] = tag + self.failUnless(key in self.metadata._tags['iptc']) + self.failUnlessEqual(self.metadata._tags['iptc'][key], tag) + key = 'Xmp.dc.subject' + tag = XmpTag(key, 'subject', 'Subject', 'An unordered array of ' \ + 'descriptive phrases or keywords that specify the topic ' \ + 'of the content of the resource.', 'bag Text', + 'sunset, Barcelona, beautiful, beach') + self.metadata[key] = tag + self.failUnless(key in self.metadata._tags['xmp']) + self.failUnlessEqual(self.metadata._tags['xmp'][key], tag) + + def test_delitem(self): + self.metadata.read() + self._set_exif_tags() + self._set_iptc_tags() + self._set_xmp_tags() + # Delete existing tags + key = 'Exif.Photo.ExifVersion' + del self.metadata[key] + self.failIf(key in self.metadata._tags['exif']) + key = 'Iptc.Application2.Caption' + del self.metadata[key] + self.failIf(key in self.metadata._tags['iptc']) + key = 'Xmp.xmp.CreateDate' + del self.metadata[key] + self.failIf(key in self.metadata._tags['xmp']) + # Try to delete nonexistent tags + keys = ('Exif.Image.SamplesPerPixel', 'Iptc.Application2.FixtureId', + 'Xmp.xmp.Rating', 'Wrong.Noluck.Raise') + for key in keys: + self.failUnlessRaises(KeyError, self.metadata.__delitem__, key) |