code: def test_validate_probability(args):
      raise_error, value = args
      if raise_error:
          with pytest.raises(ValueError, match=raise_error):
              _validate_probability(value)
      else:
          value = _validate_probability(value)
          assert isinstance(value, float)
  
imports: import os
  import numpy
  import pytest
  from xarray.core.indexing import MemoryCachedArray
  from ...data import datasets, load_arviz_data
  from ...rcparams import _make_validate_choice, _make_validate_choice_regex, _validate_float_or_none, _validate_positive_int_or_none, _validate_probability, make_iterable_validator, rc_context, rc_params, rcParams, read_rcfile
  from ...stats import compare
  from ..helpers import models
label_desc: Use image node_id 21 for calling a global function with example usage: test_validate_probability(args) without return types