code: def test_fft(
      *, d_x_d_n_n, test_flags, backend_fw, on_device, fn_name
  ):
      dtype, x, dim, norm, n = d_x_d_n_n
      helpers.test_function(
          input_dtypes=dtype,
          test_flags=test_flags,
          backend_to_test=backend_fw,
          fn_name=fn_name,
          rtol_=1e-2,
          atol_=1e-2,
          on_device=on_device,
          x=x,
          dim=dim,
          norm=norm,
          n=n,
      )
  
imports: import numpy
  import torch
  from hypothesis import strategies, assume
  import ivy
  import ivy_tests.test_ivy.helpers
  from ivy_tests.test_ivy.helpers import handle_test, BackendHandler
label_desc: Use image node_id 26 for calling a global function with example usage: test_fft() without return types