def test_cell_change_when_column_data_source():
# Given
value = ColumnDataSource(pd.DataFrame({"x": [1, 2], "y": ["a", "b"]}))
tabulator = Tabulator(value=value)
# When
tabulator._cell_change = {"c": "x", "i": 1, "v": 3}
# Then we assume the columndatasource has been update on the js side
# and therefore don't update on the python side
assert tabulator.value.to_df().loc[1, "x"] == 2
def test_cell_change_when_dataframe():
# Given
value = pd.DataFrame({"x": [1, 2], "y": ["a", "b"]})
tabulator = Tabulator(value=value)
original_data = tabulator._source.data
# When
tabulator._cell_change = {"c": "x", "i": 1, "v": 3}
# Then
assert tabulator.value.loc[1, "x"] == 3
# And the tabulator._source.data shall not have been updated
# We currently use the _pause_cds_updates parameter to avoid reupdating the _source.data
assert tabulator._source.data is original_data