Function Harness

frontend/src/react/hooks/useColumnWidths.test.tsx:18–28

({
  columns,
  handleRef,
}: {
  columns: Column[];
  handleRef: { current: Handle | null };
})

type Handle = ReturnType<typeof useColumnWidths<Column>>;

function Harness({
  columns,
  handleRef,
}: {
  columns: Column[];
  handleRef: { current: Handle | null };
}) {
  const result = useColumnWidths(columns);
  handleRef.current = result;
  return null;
}

let container: HTMLDivElement;
let root: Root;