code: def test_empty_specifier(self) -> None:
      # GIVEN
      to_parse = "name()"
  
      # WHEN
      req = Requirement(to_parse)
  
      # THEN
      assert req.name == "name"
      assert req.specifier == ""
  
imports: from typing import Optional, Set
  import pytest
  from packaging.markers import Marker
  from packaging.requirements import InvalidRequirement, Requirement
  from packaging.specifiers import SpecifierSet
label_desc: Use image node_id 4 for calling the TestRequirementParsing obj's underlying member method code with example usage: obj.test_empty_specifier() without return types