code: def test_validate_should_fail_if_body_is_none(self):
      specification = []
      body = None
  
      validator = GcpBodyFieldValidator(specification, "v1")
  
      with pytest.raises(
          RuntimeError,
          match="The body to validate is `None`. Please provide a dictionary to validate.",
      ):
          validator.validate(body)
  
imports: from __future__ import annotations
  import pytest
  from airflow.providers.google.cloud.utils.field_validator import GcpBodyFieldValidator, GcpFieldValidationException, GcpValidationSpecificationException
label_desc: Use image node_id 2 for calling the TestGcpBodyFieldValidator obj's underlying member method code with example usage: obj.test_validate_should_fail_if_body_is_none() without return types