code: def test_cfg_fail_on_empty(self) -> None:
      try:
          SSLHydraConfig.from_configs()
          self.fail("We should fail if config is not specified")
      except ConfigCompositionException:
          # we must specify the base config otherwise it fails
          pass
  
imports: import logging
  import unittest
  from hydra.errors import ConfigCompositionException, HydraException
  from utils import BENCHMARK_CONFIGS, INTEGRATION_TEST_CONFIGS, PRETRAIN_CONFIGS, SSLHydraConfig
  from vissl.utils.hydra_config import convert_to_attrdict, hydra_compose
  from vissl.utils.test_utils import parameterized_parallel
label_desc: Use image node_id 1 for calling the TestConfigsFail obj's underlying member method code with example usage: obj.test_cfg_fail_on_empty() without return types