How to fix Error: Not implemented in Node.js

Error: Not implemented
    at Readable._read (internal/streams/readable.js:...)
    at Readable.read (internal/streams/readable.js:...)

const { Readable } = require('stream');

class MyReadable extends Readable {
  constructor(options) {
    super(options);
    this.data = ['chunk1', 'chunk2', 'chunk3'];
  }

  // REQUIRED: Implement _read method
  _read(size) {
    const chunk = this.data.shift();
    if (chunk) {
      this.push(chunk);
    } else {
      this.push(null); // Signal end of stream
    }
  }
}

const { Writable } = require('stream');

class MyWritable extends Writable {
  _write(chunk, encoding, callback) {
    console.log(chunk.toString());
    callback(); // Signal completion
  }
}

// In your test setup file or specific test
describe('Component tests', () => {
  beforeAll(() => {
    // Mock window.open
    global.open = jest.fn();

    // Mock localStorage if not implemented
    const localStorageMock = {
      getItem: jest.fn(),
      setItem: jest.fn(),
      removeItem: jest.fn(),
      clear: jest.fn(),
    };
    global.localStorage = localStorageMock;

    // Mock window.matchMedia
    Object.defineProperty(window, 'matchMedia', {
      writable: true,
      value: jest.fn().mockImplementation(query => ({
        matches: false,
        media: query,
        onchange: null,
        addListener: jest.fn(),
        removeListener: jest.fn(),
        addEventListener: jest.fn(),
        removeEventListener: jest.fn(),
        dispatchEvent: jest.fn(),
      })),
    });
  });
});

// Instead of: fetch('file:///path/to/file.txt')
const fs = require('fs').promises;
const content = await fs.readFile('/path/to/file.txt', 'utf8');

const os = require('os');

function getNetworkInterfaces() {
  try {
    return os.networkInterfaces();
  } catch (err) {
    if (err.code === 'ENOSYS') {
      console.warn('networkInterfaces not supported on this platform');
      return {}; // Return safe fallback
    }
    throw err;
  }
}

node --version

# Upgrade Node.js using nvm
nvm install --lts
nvm use --lts

# Or using package manager
# Ubuntu/Debian
curl -fsSL https://deb.nodesource.com/setup_lts.x | sudo -E bash -
sudo apt-get install -y nodejs

# macOS
brew update
brew upgrade node

const fs = require('fs').promises;
const path = require('path');

async function createSymlink(target, linkPath) {
  try {
    await fs.symlink(target, linkPath);
  } catch (err) {
    if (err.code === 'ENOSYS') {
      console.log('Symlinks not supported, copying file instead');
      await fs.copyFile(target, linkPath);
    } else {
      throw err;
    }
  }
}

// Use 'junction' type for directories on Windows
if (process.platform === 'win32') {
  await fs.symlink(target, linkPath, 'junction');
}