code: def test_valid_call(self):
      points, values = self._get_sample_4d()
      interp = RegularGridInterpolator(points, values)
      sample = cp.asarray([[0.0, 0.0, 0.0, 0.0], [1.0, 1.0, 1.0, 1.0]])
      assert_raises(ValueError, interp, sample, "undefmethod")
      sample = cp.asarray([[0.0, 0.0, 0.0], [1.0, 1.0, 1.0]])
      assert_raises(ValueError, interp, sample)
      sample = cp.asarray([[0.0, 0.0, 0.0, 0.0], [1.0, 1.0, 1.0, 1.1]])
      assert_raises(ValueError, interp, sample)
  
imports: import pytest
  import cupy
  from cupy.testing import assert_allclose, assert_array_equal, assert_array_almost_equal
  from cupy_backends.cuda.api import runtime
  from pytest import raises
  from cupyx.scipy.interpolate import RegularGridInterpolator, interpn
label_desc: Use image node_id 11 for calling the TestRegularGridInterpolator obj's underlying member method code with example usage: obj.test_valid_call() without return types