Add test for image.fromstring - refs #1805

tests/python_tests/image_test.py

@@ -0,0 +1,29 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import sys
+import os, mapnik
+from timeit import Timer, time
+from nose.tools import *
+from utilities import execution_path
+
+def setup():
+    # All of the paths used are relative, if we run the tests
+    # from another directory we need to chdir()
+    os.chdir(execution_path('.'))
+
+
+def test_image_open_from_string():
+    filepath = '../data/images/dummy.png'
+    im1 = mapnik.Image.open(filepath)
+    im2 = mapnik.Image.fromstring(open(filepath,'rb').read())
+    eq_(im1.width(),im2.width())
+    length = len(im1.tostring())
+    eq_(length,len(im2.tostring()))
+    eq_(len(mapnik.Image.fromstring(im1.tostring('png')).tostring()),length)
+    eq_(len(mapnik.Image.fromstring(im1.tostring('jpeg')).tostring()),length)
+    eq_(len(mapnik.Image.fromstring(im1.tostring('tiff')).tostring()),length)
+
+if __name__ == "__main__":
+    setup()
+    [eval(run)() for run in dir() if 'test_' in run]