code: def test_no_fft_module_error(self):
      self.assertRaises(
          OptionalImportError, DetectEnvelope(), np.random.rand(1, 10)
      )
  
file_path: MONAI/tests/test_detect_envelope.py
imports: from __future__ import annotations
  import unittest
  import numpy
  import torch
  from parameterized import parameterized
  from monai.transforms import DetectEnvelope
  from monai.utils import OptionalImportError
  from tests.utils import TEST_NDARRAYS, SkipIfModule, SkipIfNoModule, assert_allclose
label_desc: Use image node_id 1 for calling the TestHilbertTransformNoFFTMod obj's underlying member method code with example usage: obj.test_no_fft_module_error() without return types