docstr: Checks if a warn is raised when the number of tests is odd
docstr_tok: ["Checks","if","a","warn","is","raised","when","the","number","of","tests","is","odd"]
code: def test_check_if_num_levels_is_even_check_odd(self):
      """
      Checks if a warn is raised when the number of tests is odd
      """
      with warns(UserWarning):
          _check_if_num_levels_is_even(5)
  
imports: from numpy.testing import assert_equal, assert_allclose
  from pytest import raises, fixture, warns, mark
  import numpy
  import warnings
  from SALib.sample.morris.morris import sample, _check_group_membership, _check_if_num_levels_is_even, _compute_optimised_trajectories, _generate_p_star, _compute_b_star, _generate_trajectory, _generate_x_star
  from SALib.util import read_param_file, compute_groups_matrix, _define_problem_with_groups, _compute_delta
label_desc: Use image node_id 9 for calling the TestGroupSampleGeneration obj's underlying member method code with example usage: obj.test_check_if_num_levels_is_even_check_odd() without return types