Function assert_frame_ranges

datafusion/expr/src/window_state.rs:724–744

(
        window_frame: &Arc<WindowFrame>,
        expected_results: Vec<Range<usize>>,
    )

    }

    fn assert_frame_ranges(
        window_frame: &Arc<WindowFrame>,
        expected_results: Vec<Range<usize>>,
    ) -> Result<()> {
        let mut window_frame_context =
            WindowFrameContext::new(Arc::clone(window_frame), vec![]);
        let (range_columns, _) = get_test_data();
        let n_row = range_columns[0].len();
        let mut last_range = Range { start: 0, end: 0 };
        for (idx, expected_range) in expected_results.into_iter().enumerate() {
            let range = window_frame_context.calculate_range(
                &range_columns,
                &last_range,
                n_row,
                idx,
            )?;
            assert_eq!(range, expected_range);
            last_range = range;
        }
        Ok(())
    }

    #[test]
    fn test_default_window_frame_group_boundaries() -> Result<()> {