code: def test_valid_dynamic(self):
      dynamic = ["Keywords", "Home-Page", "Author"]
      meta = metadata.Metadata.from_raw(
          {"dynamic": dynamic}, validate=False
      )
  
      assert meta.dynamic == [d.lower() for d in dynamic]
  
imports: import pathlib
  import pytest
  from packaging import metadata, requirements, specifiers, utils, version
  from packaging.metadata import ExceptionGroup
label_desc: Use image node_id 36 for calling the TestMetadata obj's underlying member method code with example usage: obj.test_valid_dynamic() without return types