code: def test_basic(self):
      for dtype in [np.float64, np.float32]:
          expected = np.array(
              [[0.5, 0.5], [0.75, 0.25], [0.25, 0.75], [0.375, 0.375]]
          )
          sample = self.evaluate(
              math_ops.sobol_sample(2, 4, dtype=dtype)
          )
          self.assertAllClose(expected, sample, 0.001)
  
imports: import numpy
  from tensorflow.python.eager import def_function
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import tensor_spec
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import gen_math_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.platform import googletest
label_desc: Use image node_id 1 for calling the SobolSampleOpTest obj's underlying member method code with example usage: obj.test_basic() without return types