// Assuming window object in a Node.js environment for demonstration purposes.

global.window = {

  timeouts: [],

  setTimeout: function(callback, delay) {

    const id = Math.random(); // Random ID for demonstration; usually, you'd use a more deterministic way

    this.timeouts.push({ id, callback, delay });

    return id;

  },

  clearTimeout: function(id) {

    this.timeouts = this.timeouts.filter(timeout => timeout.id !== id);

  },

  clearAllTimeouts: function() {

    // Your implementation goes here

  },

  // Utility method to emulate 'tick' of the event loop

  _tick: function() {

    this.timeouts.forEach(timeoutObj => timeoutObj.callback());

  }

};

​

// Test cases for window.clearAllTimeouts

function runTests() {

  let test1Flag = false;

  let test2Flag = false;

​

  // Schedule some timeouts

  const timeout1 = window.setTimeout(() => { test1Flag = true; }, 1000);