codex-lv3-may-2025

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Level 26: Write a Failing Test for Question Marks (Red)

Now let’s add support for question marks. Write a test that will fail:

it('should replace question marks with underscores', () => {
  const result = toSnakeCase('Hello World?');
  expect(result).toBe('hello_world_');
});

Try it now: Add this test and run it. It should fail (red) because we haven’t added support for question marks yet!

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