import { afterEach, beforeEach, describe, expect, it, vi } from "vite-plus/test"; import { serializeRenderedMarkdownFragment } from "./markdown-clipboard"; const TEXT_NODE = 3;const ELEMENT_NODE = 1; class FakeText {  readonly nodeType = TEXT_NODE;  readonly childNodes: ReadonlyArray<never> = [];   constructor(readonly textContent: string) {}} class FakeElement {  readonly nodeType = ELEMENT_NODE;  readonly childNodes: Array<FakeElement | FakeText> = [];  readonly classList = {    contains: (name: string) => this.classNames.includes(name),  };   constructor(    readonly tagName: string,    private readonly classNames: ReadonlyArray<string> = [],    private readonly attributes: Readonly<Record<string, string>> = {},  ) {}   get localName(): string {    return this.tagName.toLowerCase();  }   get textContent(): string {    return this.childNodes.map((child) => child.textContent).join("");  }   append(...children: Array<FakeElement | FakeText>): this {    this.childNodes.push(...children);    return this;  }   getAttribute(name: string): string | null {    return this.attributes[name] ?? null;  }   hasAttribute(name: string): boolean {    return Object.hasOwn(this.attributes, name);  }} function asNode(element: FakeElement): Node {  return element as unknown as Node;} function shikiCodeLine(text: string): FakeElement {  const token = new FakeElement("SPAN").append(new FakeText(text));  return new FakeElement("SPAN", ["line"]).append(token);} describe("serializeRenderedMarkdownFragment", () => {  beforeEach(() => {    vi.stubGlobal("Node", { TEXT_NODE, ELEMENT_NODE });  });   afterEach(() => {    vi.unstubAllGlobals();  });   it("wraps inline code in backticks", () => {    const paragraph = new FakeElement("P").append(      new FakeText("run "),      new FakeElement("CODE").append(new FakeText("git status")),      new FakeText(" first"),    );    const container = new FakeElement("DIV").append(paragraph);     expect(serializeRenderedMarkdownFragment(asNode(container))).toBe("run `git status` first");  });   it("keeps a highlighted block code selection plain when its pre wrapper is outside the range", () => {    const code = new FakeElement("CODE").append(      shikiCodeLine("git show-ref --verify refs/remotes/origin/opt/deploy/dev"),    );    const container = new FakeElement("DIV").append(code);     expect(serializeRenderedMarkdownFragment(asNode(container))).toBe(      "git show-ref --verify refs/remotes/origin/opt/deploy/dev",    );  });   it("keeps a multi-line code selection plain instead of inline-wrapping it", () => {    const code = new FakeElement("CODE").append(new FakeText("first line\nsecond line"));    const container = new FakeElement("DIV").append(code);     expect(serializeRenderedMarkdownFragment(asNode(container))).toBe("first line\nsecond line");  });   it("uses a rendered card's explicit Markdown copy representation", () => {    const card = new FakeElement("DIV", [], {      "data-markdown-copy": "Hello World (Document template)\n\n",    }).append(      new FakeElement("SPAN").append(new FakeText("Hello World")),      new FakeElement("SPAN").append(new FakeText("Document template")),      new FakeElement("BUTTON").append(new FakeText("Use template")),    );    const container = new FakeElement("DIV").append(card);     expect(serializeRenderedMarkdownFragment(asNode(container))).toBe(      "Hello World (Document template)",    );  });});