code: def test_get_output():
      f = np.arange(256).reshape((32, 8))
      output = _get_output(f, None, "test")
      assert output.dtype == f.dtype
      assert output.shape == f.shape
      out2 = _get_output(f, output, "test")
      assert out2 is output
  
imports: import numpy
  from mahotas.internal import _get_output, _get_axis
  from mahotas.internal import _normalize_sequence, _verify_is_integer_type, _verify_is_floatingpoint_type, _as_floating_point_array
  from mahotas.internal import _check_3
  import pytest
label_desc: Use image node_id 1 for calling a global function with example usage: test_get_output() without return types