code: def test_union_with_empty_file_yields_orig_file(self) -> None:
      run1 = TestRun("foo")
      run2 = TestRun.empty()
  
      self.assertEqual(run1 | run2, run1)
      self.assertEqual(run2 | run1, run1)
  
imports: import pathlib
  import sys
  import unittest
label_desc: Use image node_id 7 for calling the TestTestRun obj's underlying member method code with example usage: obj.test_union_with_empty_file_yields_orig_file() without return types