docstr: Test streamlitfile_util.streamlit_read.
docstr_tok: ["Test","streamlitfile_util.streamlit_read","."]
code: def test_streamlit_read_binary(self):
      """Test streamlitfile_util.streamlit_read."""
      with file_util.streamlit_read(FILENAME, binary=True) as input:
          data = input.read()
      self.assertEqual(b"\xaa\xbb", data)
  
imports: import errno
  import os
  import unittest
  from unittest.mock import MagicMock, mock_open, patch
  import pytest
  from streamlit import file_util, util
label_desc: Use image node_id 4 for calling the FileUtilTest obj's underlying member method code with example usage: obj.test_streamlit_read_binary() without return types