alice.pds.demo.boltless.dev
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1import { describe, expect, it } from "vitest";
2import { createCursorPager, discoveredPageCount, pageCount } from "./pagination.svelte";
3
4describe("profile pagination counts", () => {
5 it("uses the known total for profile lists", () => {
6 expect(pageCount(4, 30)).toBe(1);
7 expect(pageCount(30, 30)).toBe(1);
8 expect(pageCount(31, 30)).toBe(2);
9 });
10
11 it("only discovers an extra page when totals are unavailable", () => {
12 expect(discoveredPageCount(1, false)).toBe(1);
13 expect(discoveredPageCount(1, true)).toBe(2);
14 expect(discoveredPageCount(2, true)).toBe(3);
15 });
16
17 it("keeps pager lifecycle in one state", async () => {
18 let release!: (page: { items: string[] }) => void;
19 const pager = createCursorPager(
20 { items: ["first"], cursor: "next" },
21 () => new Promise<{ items: string[] }>((resolve) => (release = resolve))
22 );
23
24 const loading = pager.select(2);
25 expect(pager.state).toEqual({ kind: "loading", page: 1 });
26 release({ items: ["second"] });
27 await loading;
28 expect(pager.state).toEqual({ kind: "at-page", page: 2 });
29
30 const failing = createCursorPager({ items: ["first"], cursor: "next" }, async () => {
31 throw new Error("nope");
32 });
33 await failing.select(2);
34 expect(failing.state).toEqual({ kind: "failed", page: 1 });
35 });
36});