import type { VcsListRefsResult } from "@t3tools/contracts";import { AsyncResult } from "effect/unstable/reactivity";import { describe, expect, it } from "vite-plus/test"; import {  isPaginatedBranchesNextPagePending,  shouldLoadNextBranchPageAfterScroll,} from "./paginatedBranches"; const FIRST_PAGE: VcsListRefsResult = {  refs: [],  isRepo: true,  hasPrimaryRemote: true,  nextCursor: 100,  totalCount: 150,}; const LAST_PAGE: VcsListRefsResult = {  ...FIRST_PAGE,  nextCursor: null,}; describe("paginated branch loading state", () => {  it("does not label a first-page background refresh as loading more refs", () => {    expect(      isPaginatedBranchesNextPagePending([        AsyncResult.success(FIRST_PAGE, {          waiting: true,        }),      ]),    ).toBe(false);  });   it("only reports loading more while a new cursor has no value", () => {    expect(      isPaginatedBranchesNextPagePending([        AsyncResult.success(FIRST_PAGE),        AsyncResult.initial<VcsListRefsResult>(true),      ]),    ).toBe(true);     expect(      isPaginatedBranchesNextPagePending([        AsyncResult.success(FIRST_PAGE),        AsyncResult.success(LAST_PAGE),      ]),    ).toBe(false);  });}); describe("paginated branch scroll trigger", () => {  it("does not load from mount, layout, or an unchanged scroll position", () => {    expect(      shouldLoadNextBranchPageAfterScroll({        previousScrollTop: null,        scrollTop: 0,        scrollHeight: 224,        clientHeight: 224,      }),    ).toBe(false);     expect(      shouldLoadNextBranchPageAfterScroll({        previousScrollTop: 120,        scrollTop: 120,        scrollHeight: 344,        clientHeight: 224,      }),    ).toBe(false);  });   it("does not load when scrolling upward near the bottom", () => {    expect(      shouldLoadNextBranchPageAfterScroll({        previousScrollTop: 160,        scrollTop: 150,        scrollHeight: 450,        clientHeight: 224,      }),    ).toBe(false);  });   it("loads only after a downward scroll reaches the end threshold", () => {    expect(      shouldLoadNextBranchPageAfterScroll({        previousScrollTop: 0,        scrollTop: 100,        scrollHeight: 800,        clientHeight: 224,      }),    ).toBe(false);     expect(      shouldLoadNextBranchPageAfterScroll({        previousScrollTop: 100,        scrollTop: 500,        scrollHeight: 800,        clientHeight: 224,      }),    ).toBe(true);     expect(      shouldLoadNextBranchPageAfterScroll({        previousScrollTop: 499.5,        scrollTop: 500,        scrollHeight: 800,        clientHeight: 224,      }),    ).toBe(true);  });});