class_docstr: Tests of PyArray_OrderConverter 
code: def test_valid(self):
      self._check("c", "NPY_CORDER")
      self._check("f", "NPY_FORTRANORDER")
      self._check("a", "NPY_ANYORDER")
      self._check("k", "NPY_KEEPORDER")
  
imports: import re
  import sys
  import pytest
  import numpy
  import numpy._core._multiarray_tests
  from numpy._core.multiarray import CLIP, WRAP, RAISE
  from numpy.testing import assert_warns, IS_PYPY
label_desc: Use image node_id 1 for calling the TestOrderConverter obj's underlying member method code with example usage: obj.test_valid() without return types