success/packages/excalidraw/tests/helpers/mocks.ts

import { vi } from "vitest";
import * as MermaidToExcalidraw from "@excalidraw/mermaid-to-excalidraw";
import type { parseMermaidToExcalidraw } from "@excalidraw/mermaid-to-excalidraw";
import React from "react";

export const mockMermaidToExcalidraw = (opts: {
  parseMermaidToExcalidraw: typeof parseMermaidToExcalidraw;
  mockRef?: boolean;
}) => {
  vi.mock("@excalidraw/mermaid-to-excalidraw", async (importActual) => {
    const module = (await importActual()) as any;

    return {
      __esModule: true,
      ...module,
    };
  });
  const parseMermaidToExcalidrawSpy = vi.spyOn(
    MermaidToExcalidraw,
    "parseMermaidToExcalidraw",
  );

  parseMermaidToExcalidrawSpy.mockImplementation(opts.parseMermaidToExcalidraw);

  if (opts.mockRef) {
    vi.spyOn(React, "useRef").mockReturnValue({
      current: {
        parseMermaidToExcalidraw: parseMermaidToExcalidrawSpy,
      },
    });
  }
};