code: def test_sigmoid(
      *,
      dtype_and_x,
      test_gradients,
      class_name,
      method_name,
      ground_truth_backend,
      backend_fw,
      init_flags,
      method_flags,
      on_device,
  ):
      input_dtype, x = dtype_and_x
      helpers.test_method(
          backend_to_test=backend_fw,
          ground_truth_backend=ground_truth_backend,
          init_flags=init_flags,
          method_flags=method_flags,
          init_input_dtypes=input_dtype,
          method_input_dtypes=input_dtype,
          init_all_as_kwargs_np={},
          method_all_as_kwargs_np={"x": x[0]},
          class_name=class_name,
          method_name=method_name,
          rtol_=1e-2,
          atol_=1e-2,
          test_gradients=test_gradients,
          on_device=on_device,
      )
  
imports: from hypothesis import strategies, assume
  import ivy_tests.test_ivy.helpers
  from ivy_tests.test_ivy.helpers import handle_method
label_desc: Use image node_id 14 for calling a global function with example usage: test_sigmoid() without return types