slightly better coverage

deform/field.py

@@ -13,8 +13,8 @@
     )
 
 class _Marker(object):
-    def __repr__(self):
-        return 'Default'
+    def __repr__(self): # pragma: no cover
+        return '(Default)'
 
     __str__ = __repr__
 

deform/schema.py

@@ -119,7 +119,7 @@ def serialize(self, node, value):
     def deserialize(self, node, value):
         return value
 
-    def cstruct_children(self, node, cstruct):
+    def cstruct_children(self, node, cstruct): # pragma: no cover
         return []
 
 class Set(object):
@@ -154,6 +154,6 @@ def deserialize(self, node, value):
             raise colander.Invalid(node, _('Required'))
         return value
 
-    def cstruct_children(self, node, cstruct):
+    def cstruct_children(self, node, cstruct): # pragma: no cover
         return []
 

deform/tests/test_field.py

@@ -436,6 +436,14 @@ def test_serialize(self):
         self.assertEqual(field.serialize('abc'), 'abc')
         self.assertEqual(widget.rendered, 'writable')
 
+    def test_serialize_no_cstruct(self):
+        import colander
+        schema = DummySchema()
+        field = self._makeOne(schema)
+        widget = field.widget = DummyWidget()
+        self.assertEqual(field.serialize(), colander.null)
+        self.assertEqual(widget.rendered, 'writable')
+
     def test_serialize_null(self):
         from colander import null
         schema = DummySchema()