docstr: Error is triggered if num_results < 1.
docstr_tok: ["Error","is","triggered","if","num_results","<","1","."]
code: def test_num_results_should_be_positive(self):
      """Error is triggered if num_results < 1."""
      with self.assertRaises(tf.errors.InvalidArgumentError):
          self.evaluate(random.sobol.sample(2, 0, validate_args=True))
  
file_path: tf-quant-finance/tf_quant_finance/math/random_ops/sobol/sobol_test.py
imports: import numpy
  import tensorflow.compat.v2
  import tensorflow_probability
  from tensorflow.python.framework import test_util
  from tf_quant_finance.math import random
label_desc: Use image node_id 10 for calling the SampleSobolSequenceTest obj's underlying member method code with example usage: obj.test_num_results_should_be_positive() without return types