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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.exif import ExifTag, ExifValueError
from pyexiv2.utils import Rational
import datetime
class ExifTagMock(ExifTag):
def __init__(self, key, type, fvalue=''):
super(ExifTagMock, self).__init__(key, '', '', '', type, '', fvalue)
def _init_values(self):
pass
class ImageMetadataMock(object):
tags = {}
def _set_exif_tag_value(self, key, value):
self.tags[key] = value
def _delete_exif_tag(self, key):
try:
del self.tags[key]
except KeyError:
pass
class TestExifTag(unittest.TestCase):
def test_convert_to_python_ascii(self):
type = 'Ascii'
# Valid values: datetimes
tag = ExifTagMock('Exif.Image.DateTime', type)
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 = ExifTagMock('Exif.GPSInfo.GPSDateStamp', type)
self.assertEqual(tag._convert_to_python('2009:08:04'),
datetime.date(2009, 8, 4))
# Valid values: strings
tag = ExifTagMock('Exif.Image.Copyright', type)
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 = ExifTagMock('Exif.Image.DateTime', type)
self.assertEqual(tag._convert_to_python('2009-13-01 12:46:51'),
u'2009-13-01 12:46:51')
self.assertEqual(tag._convert_to_python('2009-12-01'), u'2009-12-01')
# Invalid values: dates
tag = ExifTagMock('Exif.GPSInfo.GPSDateStamp', type)
self.assertEqual(tag._convert_to_python('2009:13:01'), u'2009:13:01')
self.assertEqual(tag._convert_to_python('2009-12-01'), u'2009-12-01')
def test_convert_to_string_ascii(self):
type = 'Ascii'
# Valid values: datetimes
tag = ExifTagMock('Exif.Image.DateTime', type)
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')
# Valid values: dates
tag = ExifTagMock('Exif.GPSInfo.GPSDateStamp', type)
self.assertEqual(tag._convert_to_string(datetime.date(2009, 03, 01)),
'2009:03:01')
# Valid values: strings
tag = ExifTagMock('Exif.Image.Copyright', type)
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):
type = 'Byte'
# Valid values
tag = ExifTagMock('Exif.GPSInfo.GPSVersionID', type)
self.assertEqual(tag._convert_to_python('D'), 'D')
def test_convert_to_string_byte(self):
type = 'Byte'
# Valid values
tag = ExifTagMock('Exif.GPSInfo.GPSVersionID', type)
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_short(self):
type = 'Short'
# Valid values
tag = ExifTagMock('Exif.Image.BitsPerSample', type)
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):
type = 'Short'
# Valid values
tag = ExifTagMock('Exif.Image.BitsPerSample', type)
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_long(self):
type = 'Long'
# Valid values
tag = ExifTagMock('Exif.Image.ImageWidth', type)
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):
type = 'Long'
# Valid values
tag = ExifTagMock('Exif.Image.ImageWidth', type)
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):
type = 'SLong'
# Valid values
tag = ExifTagMock('Exif.OlympusCs.ManometerReading', type)
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):
type = 'SLong'
# Valid values
tag = ExifTagMock('Exif.OlympusCs.ManometerReading', type)
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):
type = 'Rational'
# Valid values
tag = ExifTagMock('Exif.Image.XResolution', type)
self.assertEqual(tag._convert_to_python('5/3'), Rational(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):
type = 'Rational'
# Valid values
tag = ExifTagMock('Exif.Image.XResolution', type)
self.assertEqual(tag._convert_to_string(Rational(5, 3)), '5/3')
# Invalid values
self.failUnlessRaises(ExifValueError, tag._convert_to_string, 'invalid')
self.failUnlessRaises(ExifValueError,
tag._convert_to_string, Rational(-5, 3))
def test_convert_to_python_srational(self):
type = 'SRational'
# Valid values
tag = ExifTagMock('Exif.Image.BaselineExposure', type)
self.assertEqual(tag._convert_to_python('5/3'), Rational(5, 3))
self.assertEqual(tag._convert_to_python('-5/3'), Rational(-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):
type = 'SRational'
# Valid values
tag = ExifTagMock('Exif.Image.BaselineExposure', type)
self.assertEqual(tag._convert_to_string(Rational(5, 3)), '5/3')
self.assertEqual(tag._convert_to_string(Rational(-5, 3)), '-5/3')
# Invalid values
self.failUnlessRaises(ExifValueError, tag._convert_to_string, 'invalid')
def test_convert_to_python_undefined(self):
type = 'Undefined'
# Valid values
tag = ExifTagMock('Exif.Photo.ExifVersion', type, '1.00')
self.assertEqual(tag._convert_to_python('48 49 48 48 '), u'1.00')
tag = ExifTagMock('Exif.Photo.DeviceSettingDescription', type, 'Digital still camera')
self.assertEqual(tag._convert_to_python('3 '), u'Digital still camera')
def test_convert_to_string_undefined(self):
type = 'Undefined'
# Valid values
tag = ExifTagMock('Exif.Photo.ExifVersion', type)
self.assertEqual(tag._convert_to_string('48 49 48 48 '), '48 49 48 48 ')
self.assertEqual(tag._convert_to_string(u'48 49 48 48 '), '48 49 48 48 ')
# Invalid values
self.failUnlessRaises(ExifValueError, tag._convert_to_string, 3)
def test_set_value_no_metadata(self):
tag = ExifTag('Exif.Thumbnail.Orientation', 'Orientation',
'Orientation', 'The image orientation viewed in terms ' \
'of rows and columns.', 'Short', '1', 'top, left')
old_value = tag.value
tag.value = 2
self.failIfEqual(tag.value, old_value)
def test_set_value_with_metadata(self):
tag = ExifTag('Exif.Thumbnail.Orientation', 'Orientation',
'Orientation', 'The image orientation viewed in terms ' \
'of rows and columns.', 'Short', '1', 'top, left')
tag.metadata = ImageMetadataMock()
old_value = tag.value
tag.value = 2
self.failIfEqual(tag.value, old_value)
self.assertEqual(tag.metadata.tags[tag.key], '2')
def test_del_value_no_metadata(self):
tag = ExifTag('Exif.Thumbnail.Orientation', 'Orientation',
'Orientation', 'The image orientation viewed in terms ' \
'of rows and columns.', 'Short', '1', 'top, left')
del tag.value
self.failIf(hasattr(tag, 'value'))
def test_del_value_with_metadata(self):
tag = ExifTag('Exif.Thumbnail.Orientation', 'Orientation',
'Orientation', 'The image orientation viewed in terms ' \
'of rows and columns.', 'Short', '1', 'top, left')
tag.metadata = ImageMetadataMock()
tag.metadata._set_exif_tag_value(tag.key, str(tag))
self.assertEqual(tag.metadata.tags, {tag.key: '1'})
del tag.value
self.failIf(hasattr(tag, 'value'))
self.failIf(tag.metadata.tags.has_key(tag.key))
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