import { describe, expect, it } from "vite-plus/test";import { renderToStaticMarkup } from "react-dom/server"; import { resolveThreadLineageWindow, ThreadLineageRowList } from "./ThreadRelationshipsControl"; const rows = Array.from({ length: 20 }, (_, index) => `row-${index}`); function renderRowList(visibleCount: number) {  const { visibleRows, hiddenCount } = resolveThreadLineageWindow(rows, visibleCount);  return renderToStaticMarkup(    <ThreadLineageRowList hiddenCount={hiddenCount} onShowMore={() => {}}>      {visibleRows.map((row) => (        <li key={row}>{row}</li>      ))}    </ThreadLineageRowList>,  );} describe("thread lineage row list", () => {  it("shows six rows before the first expansion", () => {    const { visibleRows, hiddenCount } = resolveThreadLineageWindow(rows, 6);     expect(visibleRows).toEqual(rows.slice(0, 6));    expect(hiddenCount).toBe(14);  });   it("offers one page at a time", () => {    expect(renderRowList(6)).toContain("Show 12 more");    expect(renderRowList(6 + 12)).toContain("Show 2 more");  });   it("omits the expansion affordance when everything fits", () => {    const markup = renderRowList(rows.length);     expect(markup).not.toContain("more");    expect(resolveThreadLineageWindow(rows.slice(0, 6), 6).hiddenCount).toBe(0);  });   it("keeps the rows in a bounded, labelled scroll region and the button outside it", () => {    const markup = renderRowList(6);    const list = /<ul([^>]*)>/.exec(markup)?.[1] ?? "";     expect(list).toContain('aria-label="Related threads"');    expect(list).toContain("max-h-[13.5rem]");    expect(list).toContain("overflow-y-auto");    expect(list).toContain("overscroll-contain");    expect(markup.indexOf("</ul>")).toBeLessThan(markup.indexOf("<button"));  });});