Fallback to xs:string for AttributeValue xs types

Signed-off-by: Ivan Kanakarakis <ivan.kanak@gmail.com>

Author: c00kiemon5ter

src/saml2/saml.py

@@ -327,9 +327,10 @@ def _wrong_type_value(xsd, value):
         }
 
         xsd_string = (
-            'base64Binary' if base64encode
-            else self.get_type()
-            or type_to_xsd.get(type(value)))
+            'base64Binary'
+            if base64encode
+            else self.get_type() or type_to_xsd.get(type(value))
+        )
 
         xsd_ns, xsd_type = (
             ['', type(None)] if xsd_string is None
@@ -340,7 +341,10 @@ def _wrong_type_value(xsd, value):
             ] if ':' not in xsd_string
             else xsd_string.split(':', 1))
 
-        xsd_type_props = xsd_types_props.get(xsd_type, {})
+        xsd_type_props = xsd_types_props.get(xsd_type)
+        if not xsd_type_props:
+            xsd_type_props = xsd_types_props.get("string")
+
         valid_type = xsd_type_props.get('type', type(None))
         to_type = xsd_type_props.get('to_type', str)
         to_text = xsd_type_props.get('to_text', str)

tests/test_02_saml.py

@@ -276,11 +276,15 @@ def test_set_xs_type_anytype_unchanged_value(self):
             # the value is unchanged
             assert av.text == value
 
-    def test_set_invalid_type_before_text(self):
+    def test_treat_invalid_types_as_string(self):
+        _type_name = 'invalid-type'
+        _value = 'foobar'
         av = AttributeValue()
-        av.set_type('invalid-type')
-        with raises(ValueError):
-            av.set_text('foobar')
+        av.set_type(_type_name)
+        av.set_text(_value)
+        assert av.get_type() == _type_name
+        assert av.text == _value
+        assert type(av.text) is str
 
     def test_make_vals_div(self):
         foo = saml2.make_vals(666, AttributeValue, part=True)