[
  { "id": "simple-title", "input": "Hello World", "expected": "hello-world" },
  { "id": "punctuation", "input": "Hello, world!", "expected": "hello-world" },
  { "id": "outer-spaces", "input": "  Hello World  ", "expected": "hello-world" },
  { "id": "repeated-spaces", "input": "API   Gateway", "expected": "api-gateway" },
  { "id": "digits", "input": "Version 2", "expected": "version-2" },
  { "id": "only-punctuation", "input": "---", "expected": "" }
]