docstr: Test deprecated decorator with `since` set to a future version.
docstr_tok: ["Test","deprecated","decorator","with","`","since","`","set","to","a","future","version","."]
code: def test_future(self):
      """Test deprecated decorator with `since` set to a future version."""
  
      @deprecated(
          since=self.next_version, version_val=self.test_version
      )
      def future1():
          pass
  
      with self.assertWarns(FutureWarning) as aw:
          future1()
          warnings.warn("fake warning", FutureWarning)
  
      self.assertEqual(aw.warning.args[0], "fake warning")
  
imports: from __future__ import annotations
  import unittest
  import warnings
  from monai.utils import DeprecatedError, deprecated, deprecated_arg, deprecated_arg_default
label_desc: Use image node_id 17 for calling the TestDeprecated obj's underlying member method code with example usage: obj.test_future() without return types