class_docstr: Tests assertProtoEqual().
code: def testPrimitives(self):
      self.assertAll('string_: "x"')
      self.assertNone(
          'string_: "x"',
          'string_: "y"',
          """
                      - string_: "x"
                      ?           ^
                      + string_: "y"
                      ?           ^
                      """,
      )
  
imports: import copy
  import re
  import sys
  import textwrap
  from google.protobuf import text_format
  from tensorflow.python.platform import googletest
  from tensorflow.python.util.protobuf import compare
  from tensorflow.python.util.protobuf import compare_test_pb2
label_desc: Use image node_id 10 for calling the AssertTest obj's underlying member method code with example usage: obj.testPrimitives() without return types