class_docstr: Tests for `SecurityValidatorMiddleware`.
class_docstr_tok: ["Tests","for","`","SecurityValidatorMiddleware","`","."]
code: def test_validate_x_content_type_options(self):
      self.make_request_and_assert_no_warn(
          create_headers(x_content_type_options="nosniff")
      )
  
      self.make_request_and_maybe_assert_warn(
          create_headers(x_content_type_options=""),
          'X-Content-Type-Options is required to be "nosniff"',
      )
  
file_path: tensorboard/tensorboard/backend/security_validator_test.py
imports: from unittest import mock
  import werkzeug
  from werkzeug import test
  from werkzeug.datastructures import Headers
  from werkzeug.wrappers import Response
  from tensorboard import test
  from tensorboard.backend import security_validator
  from tensorboard.util import tb_logging
label_desc: Use image node_id 4 for calling the SecurityValidatorMiddlewareTest obj's underlying member method code with example usage: obj.test_validate_x_content_type_options() without return types