test_timer_mutation.cjs
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test_timer_mutation.cjs
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	// Test timer list mutation during callback execution
	// This tests the case where a setTimeout callback adds new timers

	let results = [];
	let expected = ['timer1', 'timer2', 'timer3', 'done'];

	// Timer 1 fires and adds timer 2 at head of list
	setTimeout(() => {
	results.push('timer1');

	// Add a new timer with 0ms delay - inserts at head of timer list
	setTimeout(() => {
	results.push('timer2');

	// Add another timer from within timer2
	setTimeout(() => {
	results.push('timer3');
	}, 0);
	}, 0);
	}, 10);

	// Final check after all timers should have fired
	setTimeout(() => {
	results.push('done');

	const passed = JSON.stringify(results) === JSON.stringify(expected);
	console.log('Results:', JSON.stringify(results));
	console.log('Expected:', JSON.stringify(expected));
	console.log('Test:', passed ? 'PASSED' : 'FAILED');

	if (!passed) {
	process.exit(1);
	}
	}, 100);

	console.log('Timer mutation test started...');