code: def testFail(self):
      with self.assertRaisesRegex(
          # Due to exception chaining in PY3, we can't be more specific here and
          # check that the phrase 'Fail argument sent' is present.
          ValueError,
          "Failed to load delegate from",
      ):
          interpreter_wrapper.load_delegate(
              self._delegate_file, options={"fail": "fail"}
          )
  
imports: import ctypes
  import io
  import sys
  from unittest import mock
  import numpy
  import tensorflow
  from tensorflow.lite.python import interpreter
  from tensorflow.lite.python.metrics import metrics
  from tensorflow.lite.python.testdata import _pywrap_test_registerer
  from tensorflow.python.framework import test_util
  from tensorflow.python.platform import resource_loader
  from tensorflow.python.platform import test
label_desc: Use image node_id 7 for calling the InterpreterDelegateTest obj's underlying member method code with example usage: obj.testFail() without return types