Function assertIndexes

test/browser/virtualization.test.ts:50–60

(
  cells: Element[],
  expectedIndexes: number[],
  attribute: string,
  indexOffset: number
)

}

function assertIndexes(
  cells: Element[],
  expectedIndexes: number[],
  attribute: string,
  indexOffset: number
) {
  const actualIndexes = cells.map(
    (cell) => Number.parseInt(cell.getAttribute(attribute)!, 10) - indexOffset
  );
  expect(actualIndexes).toStrictEqual(expectedIndexes);
}

function assertHeaderCells(count: number, startIdx: number, endIdx: number) {
  assertElements(getHeaderCells(), 'aria-colindex', count, startIdx + 1, endIdx + 1);