add tests for anchor tests

Author: pvgenuchten

owslib/iso.py

@@ -414,7 +414,7 @@ def __init__(self, md=None, identtype=None):
                 namespaces))
             for i in _values:
                 val = util.testXMLValue(i)
-                if val is not None:
+                if val not in [None,'']:
                     self.uricode.append(val)
 
             _values = md.findall(util.nspath_eval(
@@ -425,17 +425,24 @@ def __init__(self, md=None, identtype=None):
                 namespaces))
             for i in _values:
                 val = util.testXMLValue(i.attrib.get('xlink:href'), True)
-                if val is not None:
+                if val not in [None,'']:
                     self.uricode.append(val)
 
             self.uricodespace = []
             for i in md.findall(util.nspath_eval(
                     'gmd:citation/gmd:CI_Citation/gmd:identifier/gmd:RS_Identifier/gmd:codeSpace/gco:CharacterString',
                     namespaces)):
                 val = util.testXMLValue(i)
-                if val is not None:
+                if val not in [None,'']:
+                    self.uricodespace.append(val)
+            for i in md.findall(util.nspath_eval(
+                    'gmd:citation/gmd:CI_Citation/gmd:identifier/gmd:RS_Identifier/gmd:codeSpace/gmx:Anchor',
+                    namespaces)):
+                val = util.testXMLValue(i.attrib.get('xlink:href'), True)
+                if val not in [None,'']:
                     self.uricodespace.append(val)
 
+
             self.date = []
             self.datetype = []