old_contents: from support import lib,ffi
  from qcgc_test import QCGCTest
  
  class AllocatorTest(QCGCTest):
      def test_cells_to_bytes(self):
          for i in range(1,17):
              self.assertEqual(1, lib.bytes_to_cells(i))
          self.assertEqual(2, lib.bytes_to_cells(17))
  
new_contents: from support import lib,ffi
  from qcgc_test import QCGCTest
  
  class AllocatorTest(QCGCTest):
      def test_cells_to_bytes(self):
          for i in range(1,17):
              self.assertEqual(1, lib.bytes_to_cells(i))
          self.assertEqual(2, lib.bytes_to_cells(17))
  
      def test_init_values(self):
          self.assertNotEqual(ffi.NULL, lib.arenas)
          for i in range(lib.qcgc_small_free_lists):
              l = lib.small_free_list(i)
              self.assertNotEqual(ffi.NULL, l)
          for i in range(lib.qcgc_large_free_lists):
              l = lib.large_free_list(i)
              self.assertNotEqual(ffi.NULL, l)
  
subject: Add testcase for allocator initialization