old_contents: import fixtures
  
  import dnfile
  
  
  def test_duplicate_stream():
      path = fixtures.DATA / "invalid-streams" / "duplicate-stream.exe"
  
      dn = dnfile.dnPE(path)
  
      assert "#US" in dn.net.metadata.streams
      assert dn.net.user_strings.get_us(1).value == "BBBBBBBB"
new_contents: import fixtures
  
  import dnfile
  
  
  def test_duplicate_stream():
      path = fixtures.DATA / "invalid-streams" / "duplicate-stream.exe"
  
      dn = dnfile.dnPE(path)
  
      assert "#US" in dn.net.metadata.streams
      assert dn.net.user_strings.get_us(1).value == "BBBBBBBB"
  
  
  def test_unknown_stream():
      path = fixtures.DATA / "invalid-streams" / "unknown-stream.exe"
  
      dn = dnfile.dnPE(path)
  
      assert "#ZZ" in dn.net.metadata.streams
subject: add test demonstrating handling of unknown stream