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# -*- coding: utf-8 -*-
# ******************************************************************************
#
# Copyright (C) 2009-2011 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.exif import ExifTag, ExifValueError
from pyexiv2.metadata import ImageMetadata
from pyexiv2.utils import make_fraction
import testutils
import datetime
import os.path
class TestExifTag(unittest.TestCase):
def test_convert_to_python_ascii(self):
# Valid values: datetimes
tag = ExifTag('Exif.Image.DateTime')
self.assertEqual(tag.type, 'Ascii')
self.assertEqual(tag._convert_to_python('2009-03-01 12:46:51'),
datetime.datetime(2009, 03, 01, 12, 46, 51))
self.assertEqual(tag._convert_to_python('2009:03:01 12:46:51'),
datetime.datetime(2009, 03, 01, 12, 46, 51))
self.assertEqual(tag._convert_to_python('2009-03-01T12:46:51Z'),
datetime.datetime(2009, 03, 01, 12, 46, 51))
# Valid values: dates
tag = ExifTag('Exif.GPSInfo.GPSDateStamp')
self.assertEqual(tag.type, 'Ascii')
self.assertEqual(tag._convert_to_python('2009:08:04'),
datetime.date(2009, 8, 4))
# Valid values: strings
tag = ExifTag('Exif.Image.Copyright')
self.assertEqual(tag.type, 'Ascii')
self.assertEqual(tag._convert_to_python('Some text.'), 'Some text.')
self.assertEqual(tag._convert_to_python(u'Some text with exotic chàräctérʐ.'),
u'Some text with exotic chàräctérʐ.')
# Invalid values: datetimes
tag = ExifTag('Exif.Image.DateTime')
self.assertEqual(tag.type, 'Ascii')
self.assertEqual(tag._convert_to_python('2009-13-01 12:46:51'),
'2009-13-01 12:46:51')
self.assertEqual(tag._convert_to_python('2009-12-01'), '2009-12-01')
# Invalid values: dates
tag = ExifTag('Exif.GPSInfo.GPSDateStamp')
self.assertEqual(tag.type, 'Ascii')
self.assertEqual(tag._convert_to_python('2009:13:01'), '2009:13:01')
self.assertEqual(tag._convert_to_python('2009-12-01'), '2009-12-01')
def test_convert_to_string_ascii(self):
# Valid values: datetimes
tag = ExifTag('Exif.Image.DateTime')
self.assertEqual(tag.type, 'Ascii')
self.assertEqual(tag._convert_to_string(datetime.datetime(2009, 03, 01, 12, 54, 28)),
'2009:03:01 12:54:28')
self.assertEqual(tag._convert_to_string(datetime.date(2009, 03, 01)),
'2009:03:01 00:00:00')
self.assertEqual(tag._convert_to_string(datetime.datetime(1899, 12, 31, 23, 59, 59)),
'1899:12:31 23:59:59')
self.assertEqual(tag._convert_to_string(datetime.date(1899, 12, 31)),
'1899:12:31 00:00:00')
# Valid values: dates
tag = ExifTag('Exif.GPSInfo.GPSDateStamp')
self.assertEqual(tag.type, 'Ascii')
self.assertEqual(tag._convert_to_string(datetime.date(2009, 03, 01)),
'2009:03:01')
self.assertEqual(tag._convert_to_string(datetime.date(1899, 12, 31)),
'1899:12:31')
# Valid values: strings
tag = ExifTag('Exif.Image.Copyright')
self.assertEqual(tag.type, 'Ascii')
self.assertEqual(tag._convert_to_string(u'Some text'), 'Some text')
self.assertEqual(tag._convert_to_string(u'Some text with exotic chàräctérʐ.'),
'Some text with exotic chàräctérʐ.')
self.assertEqual(tag._convert_to_string('Some text with exotic chàräctérʐ.'),
'Some text with exotic chàräctérʐ.')
# Invalid values
self.failUnlessRaises(ExifValueError, tag._convert_to_string, None)
def test_convert_to_python_byte(self):
# Valid values
tag = ExifTag('Exif.GPSInfo.GPSVersionID')
self.assertEqual(tag.type, 'Byte')
self.assertEqual(tag._convert_to_python('D'), 'D')
def test_convert_to_string_byte(self):
# Valid values
tag = ExifTag('Exif.GPSInfo.GPSVersionID')
self.assertEqual(tag.type, 'Byte')
self.assertEqual(tag._convert_to_string('Some text'), 'Some text')
self.assertEqual(tag._convert_to_string(u'Some text'), 'Some text')
# Invalid values
self.failUnlessRaises(ExifValueError, tag._convert_to_string, None)
def test_convert_to_python_sbyte(self):
# Valid values
tag = ExifTag('Exif.Pentax.Temperature')
self.assertEqual(tag.type, 'SByte')
self.assertEqual(tag._convert_to_python('15'), '15')
def test_convert_to_string_sbyte(self):
# Valid values
tag = ExifTag('Exif.Pentax.Temperature')
self.assertEqual(tag.type, 'SByte')
self.assertEqual(tag._convert_to_string('13'), '13')
self.assertEqual(tag._convert_to_string(u'13'), '13')
# Invalid values
self.failUnlessRaises(ExifValueError, tag._convert_to_string, None)
def test_convert_to_python_comment(self):
# Valid values
tag = ExifTag('Exif.Photo.UserComment')
self.assertEqual(tag.type, 'Comment')
self.assertEqual(tag._convert_to_python('A comment'), 'A comment')
for charset in ('Ascii', 'Jis', 'Unicode', 'Undefined', 'InvalidCharsetId'):
self.assertEqual(tag._convert_to_python('charset="%s" A comment' % charset), 'A comment')
for charset in ('Ascii', 'Jis', 'Undefined', 'InvalidCharsetId'):
self.failIfEqual(tag._convert_to_python('charset="%s" déjà vu' % charset), u'déjà vu')
def test_convert_to_string_comment(self):
# Valid values
tag = ExifTag('Exif.Photo.UserComment')
self.assertEqual(tag.type, 'Comment')
self.assertEqual(tag._convert_to_string('A comment'), 'A comment')
self.assertEqual(tag._convert_to_string(u'A comment'), 'A comment')
charsets = ('Ascii', 'Jis', 'Unicode', 'Undefined')
for charset in charsets:
tag.raw_value = 'charset="%s" foo' % charset
self.assertEqual(tag._convert_to_string('A comment'),
'charset="%s" A comment' % charset)
self.assertEqual(tag._convert_to_string('déjà vu'), 'déjà vu')
# Invalid values
self.failUnlessRaises(ExifValueError, tag._convert_to_string, None)
def test_convert_to_python_short(self):
# Valid values
tag = ExifTag('Exif.Image.BitsPerSample')
self.assertEqual(tag.type, 'Short')
self.assertEqual(tag._convert_to_python('8'), 8)
self.assertEqual(tag._convert_to_python('+5628'), 5628)
# Invalid values
self.failUnlessRaises(ExifValueError, tag._convert_to_python, 'abc')
self.failUnlessRaises(ExifValueError, tag._convert_to_python, '5,64')
self.failUnlessRaises(ExifValueError, tag._convert_to_python, '47.0001')
self.failUnlessRaises(ExifValueError, tag._convert_to_python, '1E3')
def test_convert_to_string_short(self):
# Valid values
tag = ExifTag('Exif.Image.BitsPerSample')
self.assertEqual(tag.type, 'Short')
self.assertEqual(tag._convert_to_string(123), '123')
# Invalid values
self.failUnlessRaises(ExifValueError, tag._convert_to_string, -57)
self.failUnlessRaises(ExifValueError, tag._convert_to_string, 'invalid')
self.failUnlessRaises(ExifValueError, tag._convert_to_string, 3.14)
def test_convert_to_python_sshort(self):
# Valid values
tag = ExifTag('Exif.Image.TimeZoneOffset')
self.assertEqual(tag.type, 'SShort')
self.assertEqual(tag._convert_to_python('8'), 8)
self.assertEqual(tag._convert_to_python('+5'), 5)
self.assertEqual(tag._convert_to_python('-6'), -6)
# Invalid values
self.failUnlessRaises(ExifValueError, tag._convert_to_python, 'abc')
self.failUnlessRaises(ExifValueError, tag._convert_to_python, '5,64')
self.failUnlessRaises(ExifValueError, tag._convert_to_python, '47.0001')
self.failUnlessRaises(ExifValueError, tag._convert_to_python, '1E3')
def test_convert_to_string_sshort(self):
# Valid values
tag = ExifTag('Exif.Image.TimeZoneOffset')
self.assertEqual(tag.type, 'SShort')
self.assertEqual(tag._convert_to_string(12), '12')
self.assertEqual(tag._convert_to_string(-3), '-3')
# Invalid values
self.failUnlessRaises(ExifValueError, tag._convert_to_string, 'invalid')
self.failUnlessRaises(ExifValueError, tag._convert_to_string, 3.14)
def test_convert_to_python_long(self):
# Valid values
tag = ExifTag('Exif.Image.ImageWidth')
self.assertEqual(tag.type, 'Long')
self.assertEqual(tag._convert_to_python('8'), 8)
self.assertEqual(tag._convert_to_python('+5628'), 5628)
# Invalid values
self.failUnlessRaises(ExifValueError, tag._convert_to_python, 'abc')
self.failUnlessRaises(ExifValueError, tag._convert_to_python, '5,64')
self.failUnlessRaises(ExifValueError, tag._convert_to_python, '47.0001')
self.failUnlessRaises(ExifValueError, tag._convert_to_python, '1E3')
def test_convert_to_string_long(self):
# Valid values
tag = ExifTag('Exif.Image.ImageWidth')
self.assertEqual(tag.type, 'Long')
self.assertEqual(tag._convert_to_string(123), '123')
self.assertEqual(tag._convert_to_string(678024), '678024')
# Invalid values
self.failUnlessRaises(ExifValueError, tag._convert_to_string, -57)
self.failUnlessRaises(ExifValueError, tag._convert_to_string, 'invalid')
self.failUnlessRaises(ExifValueError, tag._convert_to_string, 3.14)
def test_convert_to_python_slong(self):
# Valid values
tag = ExifTag('Exif.OlympusCs.ManometerReading')
self.assertEqual(tag.type, 'SLong')
self.assertEqual(tag._convert_to_python('23'), 23)
self.assertEqual(tag._convert_to_python('+5628'), 5628)
self.assertEqual(tag._convert_to_python('-437'), -437)
# Invalid values
self.failUnlessRaises(ExifValueError, tag._convert_to_python, 'abc')
self.failUnlessRaises(ExifValueError, tag._convert_to_python, '5,64')
self.failUnlessRaises(ExifValueError, tag._convert_to_python, '47.0001')
self.failUnlessRaises(ExifValueError, tag._convert_to_python, '1E3')
def test_convert_to_string_slong(self):
# Valid values
tag = ExifTag('Exif.OlympusCs.ManometerReading')
self.assertEqual(tag.type, 'SLong')
self.assertEqual(tag._convert_to_string(123), '123')
self.assertEqual(tag._convert_to_string(678024), '678024')
self.assertEqual(tag._convert_to_string(-437), '-437')
# Invalid values
self.failUnlessRaises(ExifValueError, tag._convert_to_string, 'invalid')
self.failUnlessRaises(ExifValueError, tag._convert_to_string, 3.14)
def test_convert_to_python_rational(self):
# Valid values
tag = ExifTag('Exif.Image.XResolution')
self.assertEqual(tag.type, 'Rational')
self.assertEqual(tag._convert_to_python('5/3'), make_fraction(5, 3))
# Invalid values
self.failUnlessRaises(ExifValueError, tag._convert_to_python, 'invalid')
self.failUnlessRaises(ExifValueError, tag._convert_to_python, '-5/3')
self.failUnlessRaises(ExifValueError, tag._convert_to_python, '5 / 3')
self.failUnlessRaises(ExifValueError, tag._convert_to_python, '5/-3')
def test_convert_to_string_rational(self):
# Valid values
tag = ExifTag('Exif.Image.XResolution')
self.assertEqual(tag.type, 'Rational')
self.assertEqual(tag._convert_to_string(make_fraction(5, 3)), '5/3')
# Invalid values
self.failUnlessRaises(ExifValueError, tag._convert_to_string, 'invalid')
self.failUnlessRaises(ExifValueError,
tag._convert_to_string, make_fraction(-5, 3))
def test_convert_to_python_srational(self):
# Valid values
tag = ExifTag('Exif.Image.BaselineExposure')
self.assertEqual(tag.type, 'SRational')
self.assertEqual(tag._convert_to_python('5/3'), make_fraction(5, 3))
self.assertEqual(tag._convert_to_python('-5/3'), make_fraction(-5, 3))
# Invalid values
self.failUnlessRaises(ExifValueError, tag._convert_to_python, 'invalid')
self.failUnlessRaises(ExifValueError, tag._convert_to_python, '5 / 3')
self.failUnlessRaises(ExifValueError, tag._convert_to_python, '5/-3')
def test_convert_to_string_srational(self):
# Valid values
tag = ExifTag('Exif.Image.BaselineExposure')
self.assertEqual(tag.type, 'SRational')
self.assertEqual(tag._convert_to_string(make_fraction(5, 3)), '5/3')
self.assertEqual(tag._convert_to_string(make_fraction(-5, 3)), '-5/3')
# Invalid values
self.failUnlessRaises(ExifValueError, tag._convert_to_string, 'invalid')
def test_convert_to_python_undefined(self):
# Valid values
tag = ExifTag('Exif.Photo.ExifVersion')
self.assertEqual(tag.type, 'Undefined')
self.assertEqual(tag._convert_to_python('48 49 48 48'), '0100')
def test_convert_to_string_undefined(self):
# Valid values
tag = ExifTag('Exif.Photo.ExifVersion')
self.assertEqual(tag.type, 'Undefined')
self.assertEqual(tag._convert_to_string('0100'), '48 49 48 48')
self.assertEqual(tag._convert_to_string(u'0100'), '48 49 48 48')
# Invalid values
self.failUnlessRaises(ExifValueError, tag._convert_to_string, 3)
def test_set_value(self):
tag = ExifTag('Exif.Thumbnail.Orientation', 1) # top, left
old_value = tag.value
tag.value = 2
self.failIfEqual(tag.value, old_value)
def test_set_raw_value_invalid(self):
tag = ExifTag('Exif.GPSInfo.GPSVersionID')
value = '2 0 0 foo'
self.failUnlessRaises(ValueError, setattr, tag, 'raw_value', value)
def test_makernote_types(self):
# Makernote tags not attached to an image have an Undefined type by
# default. When read from an existing image though, their type should be
# correctly set (see https://bugs.launchpad.net/pyexiv2/+bug/781464).
tag1 = ExifTag('Exif.Pentax.PreviewResolution')
tag1.raw_value = '640 480'
self.assertEqual(tag1.type, 'Undefined')
self.failUnlessRaises(ValueError, getattr, tag1, 'value')
tag2 = ExifTag('Exif.Pentax.CameraInfo')
tag2.raw_value = '76830 20070527 2 1 4228109'
self.assertEqual(tag2.type, 'Undefined')
self.failUnlessRaises(ValueError, getattr, tag2, 'value')
filepath = testutils.get_absolute_file_path(os.path.join('data', 'pentax-makernote.jpg'))
checksum = '646804b309a4a2d31feafe9bffc5d7f0'
self.assert_(testutils.CheckFileSum(filepath, checksum))
metadata = ImageMetadata(filepath)
metadata.read()
tag1 = metadata[tag1.key]
self.assertEqual(tag1.type, 'Short')
self.assertEqual(tag1.value, [640, 480])
tag2 = metadata[tag2.key]
self.assertEqual(tag2.type, 'Long')
self.assertEqual(tag2.value, [76830L, 20070527L, 2L, 1L, 4228109L])
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