// math.test.ts
import { describe, it, expect } from 'vitest';
import { add } from './math';

describe('add', () => {
  it('should sum two numbers', () => {
    expect(add(2, 2)).toBe(4); // Fails: ReferenceError: add is not defined
  });
});

// math.ts
export const add = (a: any, b: any) => {
  return 4; // Passes: Minimal code to satisfy the test
};

// math.ts
/**
 * Sums two numbers with explicit type safety.
 */
export const add = (a: number, b: number): number => {
  return a + b; // Passes: Proper implementation with safety net
};