docstr: Test a call to an instance of the class.
          
docstr_tok: ["Test","a","call","to","an","instance","of","the","class","."]
code: def test_call(self):
      """Test a call to an instance of the class."""
  
      self.input_array[:] = numpy.random.randn(
          *self.input_array.shape
      ) + 1j * numpy.random.randn(*self.input_array.shape)
  
      output_array = self.fft()
  
      self.assertTrue(numpy.all(output_array == self.output_array))
  
imports: from pyfftw import FFTW, empty_aligned, byte_align
  from .test_pyfftw_base import run_test_suites, miss, require
  import numpy
  import unittest
label_desc: Use image node_id 3 for calling the FFTWCallTest obj's underlying member method code with example usage: obj.test_call() without return types