codex-lv3-may-2025

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Level 20: Testing Special Characters

What about text with special characters like exclamation marks?

Plan: capture how punctuation is treated by asserting toSnakeCase('Hello World!') keeps the exclamation mark intact at the end.

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it('should handle text with special characters', () => {
  const result = toSnakeCase('Hello World!');
  expect(result).toBe('hello_world!');
});

Try it: Add this test. Do special characters get preserved?

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