class_docstr: Test NetCDF4 File Handler Utility class.
class_docstr_tok: ["Test","NetCDF4","File","Handler","Utility","class","."]
docstr: Test that error is raised when file not found.
docstr_tok: ["Test","that","error","is","raised","when","file","not","found","."]
code: def test_filenotfound(self):
      """Test that error is raised when file not found."""
      from satpy.readers.netcdf_utils import NetCDF4FileHandler
  
      with pytest.raises(
          IOError, match=".*No such file or directory.*"
      ):
          NetCDF4FileHandler("/thisfiledoesnotexist.nc", {}, {})
  
imports: import os
  import unittest
  import numpy
  import pytest
label_desc: Use image node_id 7 for calling the TestNetCDF4FileHandler obj's underlying member method code with example usage: obj.test_filenotfound() without return types