class_docstr: Test the path hook for source.
class_docstr_tok: ["Test","the","path","hook","for","source","."]
code: def test_empty_string(self):
      # The empty string represents the cwd.
      self.assertTrue(hasattr(self.path_hook()(""), "find_spec"))
  
imports: from test.test_importlib import util
  import unittest
label_desc: Use image node_id 3 for calling the PathHookTest obj's underlying member method code with example usage: obj.test_empty_string() without return types