WIP: Additional warnings, errors and tests.

unittests/table_json_conversion/test_read_xlsx.py

@@ -114,6 +114,9 @@ def test_faulty_foreign():
     # Simple wrong foreign key
     converter = convert.XLSXConverter(xlsx=rfp("data/simple_data_wrong_foreign.xlsx"),
                                       schema=rfp("data/simple_schema.json"))
+    from IPython import embed
+    embed()
+
     with pytest.raises(RuntimeError):
         converter.to_dict()
     errors = converter.get_errors()