docstr: Test passing a garbage flag fails
          
code: def test_invalid_flag_fail(self):
      """Test passing a garbage flag fails"""
      in_shape = self.input_shapes["1d"]
      out_shape = self.output_shapes["1d"]
  
      axes = (0,)
      a, b = self.create_test_arrays(in_shape, out_shape)
  
      self.assertRaisesRegex(
          ValueError,
          "Invalid flag",
          self.run_validate_fft,
          *(a, b, axes),
          **{"flags": ("garbage",)},
      )
  
imports: from pyfftw import FFTW, byte_align, empty_aligned, forget_wisdom
  import pyfftw
  import numpy
  from timeit import Timer
  import time
  import unittest
  from .test_pyfftw_base import FFTWBaseTest, run_test_suites, miss, np_fft
label_desc: Use image node_id 12 for calling the Complex64FFTW1DTest obj's underlying member method code with example usage: obj.test_invalid_flag_fail() without return types