av-kit/tests/mocks/ffmpeg-mock.ts

AVFoundation Recorder kit for Node.js

import { EventEmitter } from "events";

// Mock for child_process.spawn
export class MockChildProcess extends EventEmitter {
  public pid = 12345;
  public stdin = new EventEmitter();
  public stdout = new EventEmitter();
  public stderr = new EventEmitter();
  public killed = false;

  kill() {
    this.killed = true;
    this.emit("close", 0);
    return true;
  }
}

// Mock for path module functions
export const pathMock = {
  join: jest.fn((...paths: string[]) => paths.join("/")),
  resolve: jest.fn((...paths: string[]) => paths.join("/")),
};

// Mock for fs/promises functions
export const fsMock = {
  mkdir: jest.fn().mockResolvedValue(undefined),
  access: jest.fn().mockResolvedValue(undefined),
  stat: jest.fn().mockResolvedValue({
    isFile: () => true,
    size: 1024,
  }),
};

// Mock for child_process functions
export const childProcessMock = {
  spawn: jest.fn(() => {
    const proc = new MockChildProcess();
    setTimeout(() => {
      proc.emit("spawn");
    }, 10);
    return proc;
  }),
};

// Mock for device detection responses
export const devicesMock = {
  displays: [
    { id: "display1", name: "Main Display" },
    { id: "display2", name: "Secondary Display" },
  ],
  cameras: [
    { id: "camera1", name: "FaceTime HD Camera" },
    { id: "camera2", name: "External Camera" },
  ],
  microphones: [
    { id: "mic1", name: "Built-in Microphone" },
    { id: "mic2", name: "External Microphone" },
  ],
};

// Mock implementation of execFileSync for device detection
export const execFileSyncMock = jest.fn((command: string, args: string[]) => {
  if (args.includes("-list_devices") && args.includes("true")) {
    return Buffer.from(`
      [AVFoundation input device @ 0x7f8c7f5c5000] AVFoundation video devices:
      [AVFoundation input device @ 0x7f8c7f5c5000] [0] FaceTime HD Camera
      [AVFoundation input device @ 0x7f8c7f5c5000] [1] External Camera
      [AVFoundation input device @ 0x7f8c7f5c5000] AVFoundation audio devices:
      [AVFoundation input device @ 0x7f8c7f5c5000] [0] Built-in Microphone
      [AVFoundation input device @ 0x7f8c7f5c5000] [1] External Microphone
    `);
  }
  return Buffer.from("");
});

// Mock for video metadata
export const videoMetadataMock = {
  dimensions: {
    width: 1920,
    height: 1080,
  },
  durationInSeconds: 60,
};