code: def testNonExistentFile(self):
      converter = upgrade_schema_lib.Converter()
      _, non_existent = tempfile.mkstemp(
          suffix=".json"
      )  # safe to ignore fd
      with self.assertRaisesRegex(IOError, "No such file or directory"):
          converter.Convert(non_existent, non_existent)
  
file_path: tensorflow/tensorflow/lite/schema/upgrade_schema_test.py
imports: import json
  import tempfile
  from tensorflow.lite.schema import upgrade_schema
  from tensorflow.python.framework import test_util
  from tensorflow.python.platform import test
label_desc: Use image node_id 1 for calling the TestSchemaUpgrade obj's underlying member method code with example usage: obj.testNonExistentFile() without return types