code: def test_manage_allocate_free_host(size):
      buf = cuda.new_host_buffer(size)
      arr = np.frombuffer(buf, dtype=np.uint8)
      arr[size // 4 : 3 * size // 4] = 1
      arr_cp = arr.copy()
      arr2 = np.frombuffer(buf, dtype=np.uint8)
      np.testing.assert_equal(arr2, arr_cp)
      assert buf.size == size
  
imports: import sys
  import sysconfig
  import pytest
  import pyarrow
  import numpy
label_desc: Use image node_id 4 for calling a global function with example usage: test_manage_allocate_free_host(size) without return types