code: def test_jump() -> None:
      x = np.arange(6)[:, None].dot(np.ones((1, 2)))
      jump = mutation.Jumping(axis=0, size=5)
      array = jump(Array(init=x))
      array.random_state.seed(38)
      array.mutate()
      expected = np.array([0, 3, 4, 1, 2, 5])[:, None].dot(
          np.ones((1, 2))
      )
      np.testing.assert_array_equal(array.value, expected)
  
file_path: nevergrad/nevergrad/parametrization/test_mutation.py
imports: import typing
  import numpy
  from nevergrad.common import testing
  from .None import mutation
  from .data import Array
label_desc: Use image node_id 8 for calling a global function with example usage: test_jump() without return types