def METHOD_NAME(self):
    bsl = BaseStackedLine(x="key", y=["val"])
    # BaseChart variables
    assert bsl.x == "key"
    assert bsl.y == ["val"]
    assert bsl.data_points == 100
    assert bsl.add_interaction is True
    assert bsl.stride is None
    assert bsl.stride_type == int
    assert bsl._library_specific_params == {}
    assert bsl.chart is None
    assert bsl.source is None
    assert bsl.source_backup is None
    assert bsl.min_value == 0.0
    assert bsl.max_value == 0.0
    assert bsl.chart_type is None
    # BaseStackedLineChart variables
    assert bsl.use_data_tiles is False
    assert bsl.reset_event is None
    assert bsl.x_range is None
    assert bsl.y_range is None
    assert bsl.colors == ["#8735fb"]