class_docstr: Tests correctness of the Gumbel bijector.
code: def testScalarCongruency(self):
      bijector_test_util.assert_scalar_congruency(
          gumbel_cdf.GumbelCDF(loc=0.3, scale=20.0),
          lower_x=1.0,
          upper_x=100.0,
          eval_func=self.evaluate,
          rtol=0.05,
      )
  
file_path: probability/tensorflow_probability/python/bijectors/gumbel_cdf_test.py
imports: import numpy
  from scipy import stats
  import tensorflow.compat.v2
  from tensorflow_probability.python.bijectors import bijector_test_util
  from tensorflow_probability.python.bijectors import gumbel_cdf
  from tensorflow_probability.python.internal import test_util
label_desc: Use image node_id 2 for calling the GumbelCDFTest obj's underlying member method code with example usage: obj.testScalarCongruency() without return types