def test_sha256_checksum(self):
test_file = self.get_test_loc('hash/dir1/a.png')
assert sha256(
test_file
) == u'1b598db6fee8f1ec7bb919c0adf68956f3d20af8c9934a9cf2db52e1347efd35'
def sha256_digest(location):
"""
Return an algorithm-prefixed checksum for the file content at location.
"""
return location and ('sha256:' + unicode(sha256(location)))