code: def test_binary_cross_entropy_double_backward(seed, ctx, func_name):
      from nbla_test_utils import backward_function_tester
  
      rng = np.random.RandomState(seed)
      inputs = [rng.rand(2, 3, 4).astype(np.float32) for _ in range(2)]
      inputs[1] = np.round(inputs[1])
      backward_function_tester(
          rng,
          F.binary_cross_entropy,
          inputs,
          backward=[True, False],
          ctx=ctx,
          skip_backward_check=True,
      )
  
imports: import pytest
  import numpy
  import nnabla.functions
  from nbla_test_utils import list_context
label_desc: Use image node_id 2 for calling a global function with example usage: test_binary_cross_entropy_double_backward(seed, ctx, func_name) without return types