import { describe, expect, it, vi } from "vite-plus/test"; import type { ComposerFileAttachment } from "../../composerDraftStore";import {  attachVideoThumbnail,  buildExpandedImagePreview,  downloadVideoPreview,} from "./ExpandedImagePreview"; describe("buildExpandedImagePreview", () => {  it("builds a video preview for a local video attachment", () => {    const file = new File([new Uint8Array([1, 2, 3])], "demo.mp4", { type: "video/mp4" });    const attachment: ComposerFileAttachment = {      type: "file",      id: "video-1",      name: file.name,      mimeType: file.type,      sizeBytes: file.size,      file,    };     const preview = buildExpandedImagePreview([attachment], attachment.id);     expect(preview).toMatchObject({      images: [{ name: "demo.mp4", type: "video" }],      index: 0,    });    expect(preview?.images[0]?.src).toMatch(/^blob:/);    URL.revokeObjectURL(preview?.images[0]?.src ?? "");  });   it("releases a video thumbnail URL when detached", async () => {    const video = { src: "" } as HTMLVideoElement;    const file = new File([new Uint8Array([1, 2, 3])], "demo.mp4", { type: "video/mp4" });     const detach = attachVideoThumbnail(video, file);    const url = video.src;     expect((await fetch(url)).ok).toBe(true);    detach();    await expect(fetch(url)).rejects.toThrow();  });   it("downloads a video through a local blob URL", async () => {    vi.useFakeTimers();    const source = URL.createObjectURL(new Blob([new Uint8Array([1, 2, 3])]));    const click = vi.fn();    const anchor = { href: "", download: "", click };    vi.stubGlobal("document", { createElement: () => anchor });     try {      await downloadVideoPreview(source, "demo.mp4");       expect(anchor.download).toBe("demo.mp4");      expect(anchor.href).toMatch(/^blob:/);      expect(anchor.href).not.toBe(source);      expect(click).toHaveBeenCalledOnce();      expect((await fetch(anchor.href)).ok).toBe(true);       await vi.runAllTimersAsync();      await expect(fetch(anchor.href)).rejects.toThrow();    } finally {      URL.revokeObjectURL(source);      vi.useRealTimers();      vi.unstubAllGlobals();    }  });});