import { describe, expect, it, vi } from "vitest";
import { fetchAllCursorPages } from "./parse.ts";

describe("fetchAllCursorPages", () => {
  it("keeps configuration rows beyond the first cursor page", async () => {
    const fetchPage = vi.fn(async (cursor?: string) =>
      cursor
        ? { items: [201, 202], nextCursor: null, total: 202 }
        : { items: Array.from({ length: 200 }, (_, i) => i + 1), nextCursor: "page-2", total: 202 },
    );
    const result = await fetchAllCursorPages(fetchPage);
    expect(result.items).toHaveLength(202);
    expect(result.items.slice(-2)).toEqual([201, 202]);
    expect(result.total).toBe(202);
    expect(result.nextCursor).toBeNull();
    expect(fetchPage.mock.calls).toEqual([[], ["page-2"]]);
  });

  it("rejects a repeated cursor instead of looping indefinitely", async () => {
    const fetchPage = vi.fn(async () => ({ items: [1], nextCursor: "same" }));
    await expect(fetchAllCursorPages(fetchPage)).rejects.toThrow("分页游标重复");
    expect(fetchPage).toHaveBeenCalledTimes(2);
  });

  it("propagates a later page failure instead of returning a partial configuration", async () => {
    const failure = new Error("aborted");
    await expect(
      fetchAllCursorPages(async (cursor) => {
        if (cursor) throw failure;
        return { items: [1], nextCursor: "next" };
      }),
    ).rejects.toBe(failure);
  });
});