Added a unit test for bug #183618.

1 files changed, 85 insertions, 0 deletions

diff --git a/unittest/Bug183618_TestCase.py b/unittest/Bug183618_TestCase.py
new file mode 100644
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+++ b/unittest/Bug183618_TestCase.py
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+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+# ******************************************************************************
+#
+# Copyright (C) 2006-2007 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.
+#
+#
+# File:      Bug183618_TestCase.py
+# Author(s): Olivier Tilloy <olivier@tilloy.net>
+#
+# ******************************************************************************
+
+import unittest
+import testutils
+import os.path
+import pyexiv2
+
+class Bug183618_TestCase(unittest.TestCase):
+
+    """
+    Test case for bug #183618.
+
+    Summary: Exif.GPSInfo.{GPSLongitude,Latitude} are not decoded.
+    Description: The GPS latitude and longitude data is not correctly decoded
+    because multiple value fields for EXIF tags are not correctly dealt with:
+    only the first value is extracted and returned.
+    Fix: fixed with revision 79, behaviour changed with revision 82.
+    """
+
+    def checkTypeAndValue(self, tag, etype, evalue):
+        """
+        Check the type and the value of a metadata tag against expected values.
+
+        Keyword arguments:
+        tag -- the full name of the tag (eg. 'Exif.Image.DateTime')
+        etype -- the expected type of the tag value
+        evalue -- the expected value of the tag
+        """
+        self.assertEqual(tag.__class__, etype)
+        self.assertEqual(tag, evalue)
+
+    def testReadGPSMetadata(self):
+        """
+        Test the extraction of the GPS metadata from a file.
+        """
+        # Check that the reference file is not corrupted
+        filename = os.path.join('data', 'bug183618.jpg')
+        md5sum = 'ccddff432b0a2dc8f544f0f380e1fa6d'
+        self.assert_(testutils.CheckFileSum(filename, md5sum))
+
+        # Read the image metadata
+        image = pyexiv2.Image(filename)
+        image.readMetadata()
+
+        # Exhaustive tests on the values of EXIF GPS metadata
+        gpsTags = [('Exif.Image.GPSTag', long, 1313L),
+                   ('Exif.GPSInfo.GPSVersionID', str, '2 0 0 0 '),
+                   ('Exif.GPSInfo.GPSLatitudeRef', str, 'N'),
+                   ('Exif.GPSInfo.GPSLatitude', tuple, (pyexiv2.Rational(47, 1), pyexiv2.Rational(3817443, 1000000), pyexiv2.Rational(0, 1))),
+                   ('Exif.GPSInfo.GPSLongitudeRef', str, 'E'),
+                   ('Exif.GPSInfo.GPSLongitude', tuple, (pyexiv2.Rational(8, 1), pyexiv2.Rational(41359940, 1000000), pyexiv2.Rational(0, 1))),
+                   ('Exif.GPSInfo.GPSAltitudeRef', str, '0 '),
+                   ('Exif.GPSInfo.GPSAltitude', pyexiv2.Rational, pyexiv2.Rational(1908629, 1250)),
+                   ('Exif.GPSInfo.GPSMapDatum', str, 'WGS-84')]
+        self.assertEqual([tag for tag in image.exifKeys() if tag.find('GPS') != -1], [tag[0] for tag in gpsTags])
+        for tag in gpsTags:
+            self.checkTypeAndValue(image[tag[0]], tag[1], tag[2])
+