message: Add a check to skip tests if GPUs are not present.
diff: @@ -1448,6 +1448,9 @@ class MultiWorkerMirroredStrategyTest(
  return strategy
  def test_num_replicas_in_sync(self):
  + if not GPU_TEST:
  + self.skipTest("Not GPU test")
  +
  strategy = self._get_distribution_strategy()
  # We calculate the total number of gpus across the workers(2) specified in
  # the cluster spec.
  