import { describe, expect, it } from "vite-plus/test"; import { sectionCollapseAnchorScrollTop } from "./pullRequestSummaryScroll.logic"; describe("section collapse scroll anchoring", () => {  it("returns the section's natural offset when its heading is pinned", () => {    expect(      sectionCollapseAnchorScrollTop({        scrollTop: 600,        viewportTop: 264,        sectionTop: -200,        headingTop: 264,      }),    ).toBe(136);  });   it("allows a fractional sticky-edge difference", () => {    expect(      sectionCollapseAnchorScrollTop({        scrollTop: 500,        viewportTop: 264,        sectionTop: 100,        headingTop: 264.5,      }),    ).toBe(336);  });   it("leaves the scroll position alone before the heading becomes sticky", () => {    expect(      sectionCollapseAnchorScrollTop({        scrollTop: 120,        viewportTop: 264,        sectionTop: 320,        headingTop: 320,      }),    ).toBeNull();  });   it("does not produce a negative scroll offset", () => {    expect(      sectionCollapseAnchorScrollTop({        scrollTop: 20,        viewportTop: 264,        sectionTop: 200,        headingTop: 264,      }),    ).toBe(0);  });});