import { describe, expect, it } from "vite-plus/test"; import { prepareVideoFirstFrame } from "./videoFirstFrame"; type PreviewVideo = Parameters<typeof prepareVideoFirstFrame>[0]; function previewVideo(overrides: Partial<PreviewVideo> = {}): PreviewVideo {  return {    autoplay: false,    paused: true,    seeking: false,    currentTime: 0,    duration: 5,    played: { length: 0, start: () => 0, end: () => 0 },    src: "https://environment.test/api/assets/signed/video.mp4?signature=example",    ...overrides,  };} describe("prepareVideoFirstFrame", () => {  it.each([    [5, 0.1],    [0.05, 0.025],  ])(    "seeks within a %s second video only once when metadata repeats",    (duration, expectedPosition) => {      const video = previewVideo({ duration });      const seeks: number[] = [];      Object.defineProperty(video, "currentTime", {        get: () => seeks.at(-1) ?? 0,        set: (value: number) => seeks.push(value),      });      prepareVideoFirstFrame(video);      prepareVideoFirstFrame(video);       expect(seeks).toEqual([expectedPosition]);    },  );   it.each<Partial<PreviewVideo>>([    { autoplay: true },    { paused: false },    { seeking: true },    { currentTime: 2 },    { played: { length: 1, start: () => 0, end: () => 2 } },    { duration: 0 },    { duration: Number.POSITIVE_INFINITY },  ])("does not seek over playback or unavailable metadata: %j", (state) => {    const video = previewVideo(state);    const position = video.currentTime;     prepareVideoFirstFrame(video);     expect(video.currentTime).toBe(position);  });   it.each([    ["video.mp4#t=0,4", 0],    ["video.mp4#xywh=0,0,100,100&%74=3", 0],    ["video%23t=3.mp4", 0.1],  ])(    "distinguishes temporal fragments from encoded filename hashes: %s",    (path, expectedPosition) => {      const video = previewVideo({ src: `https://environment.test/${path}` });       prepareVideoFirstFrame(video);       expect(video.currentTime).toBe(expectedPosition);    },  );   it("tolerates a browser rejecting the preview seek", () => {    const video = previewVideo();    Object.defineProperty(video, "currentTime", {      get: () => 0,      set: () => {        throw new Error("The stream is not seekable yet");      },    });     expect(() => prepareVideoFirstFrame(video)).not.toThrow();  });});