class_docstr: Tests for NodeFileWriter.
code: def tearDown(self):
      super().tearDown()
      self.node_file.close()
  
imports: import io
  import os
  import struct
  import tempfile
  import numpy
  from tensorflow.core.framework import node_def_pb2
  from tensorflow.python.eager import context
  from tensorflow.python.framework import config
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import tensor_util
  from tensorflow.python.framework import test_util
  from tensorflow.python.framework.test_util import IsMklEnabled
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import gen_array_ops
  from tensorflow.python.ops import gen_math_ops
  from tensorflow.python.ops import gen_nn_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 4 for calling the NodeFileWriterTest obj's underlying member method code with example usage: obj.tearDown() without return types