Solves issue #4

Author: lopezco

python/model/base.py

@@ -166,6 +166,10 @@ def _validate(self, input):
                 elif var_type == 'category':
                     if categories is not None:
                         var_type = CategoricalDtype(categories=categories, ordered=True)
+                        new_cat = set(df[name].unique()).difference(categories)
+                        if len(new_cat):
+                            msg = 'Unexpected categorical value in input data: {}'.format(new_cat)
+                            raise ValueError(msg)
                     else:
                         msg = 'Missing "categories" for "{}" in metadata'.format(name)
                         raise ValueError(msg)