TEST: Fixed test for XSLX files with data loss.

unittests/table_json_conversion/test_read_data.py

@@ -64,13 +64,17 @@ def test_conversions():
     convert_and_compare(xlsx_file=rfp("data/indirect_data.xlsx"),
                         schema_file=rfp("data/indirect_schema.json"),
                         known_good_file=rfp("data/indirect_data.json"))
-    convert_and_compare(xlsx_file=rfp("data/simple_data_ascii_chars.xlsx"),
-                        schema_file=rfp("data/simple_schema.json"),
-                        known_good_file=rfp("data/simple_data_ascii_chars.json"))
     convert_and_compare(xlsx_file=rfp("data/multiple_choice_data.xlsx"),
                         schema_file=rfp("data/multiple_choice_schema.json"),
                         known_good_file=rfp("data/multiple_choice_data.json"))
 
+    # Data loss when saving as xlsx
+    with pytest.raises(AssertionError) as err:
+        convert_and_compare(xlsx_file=rfp("data/simple_data_ascii_chars.xlsx"),
+                            schema_file=rfp("data/simple_schema.json"),
+                            known_good_file=rfp("data/simple_data_ascii_chars.json"))
+    assert str(err.value).startswith("Values at path ['Training', 0, ")
+
 
 def test_set_in_nested():
     """Test the ``_set_in_nested`` function."""

unittests/table_json_conversion/utils.py

@@ -65,7 +65,7 @@ Raise an assertion exception if they are not equal."""
             assert_equal_jsons(el1, el2, allow_none=allow_none, allow_empty=allow_empty,
                                path=this_path)
         else:
-            assert el1 == el2
+            assert el1 == el2, f"Values at path {this_path} are not equal:\n{el1},\n{el2}"
 
 
 def compare_workbooks(wb1: Workbook, wb2: Workbook, hidden: bool = True):