Function fill

examples/pdf-server/server.test.ts:83–92

(cache: PdfCache, url: string)

    const tenBytes = new Uint8Array(10);

    async function fill(cache: PdfCache, url: string): Promise<void> {
      const m = spyOn(globalThis, "fetch").mockResolvedValueOnce(
        new Response(tenBytes, { status: 200 }),
      );
      try {
        await cache.readPdfRange(url, 0, 1024);
      } finally {
        m.mockRestore();
      }
    }

    it("evicts least-recently-used entry when total exceeds cap", async () => {
      const cache = createPdfCache(25);