old_contents: from indra.databases import mesh_client
  
  def test_mesh_id_lookup():
      mesh_id = 'D003094'
      mesh_name = mesh_client.get_mesh_name(mesh_id)
      assert mesh_name == 'Collagen'
  
new_contents: from indra.databases import mesh_client
  
  def test_mesh_id_lookup():
      mesh_id = 'D003094'
      mesh_name = mesh_client.get_mesh_name(mesh_id)
      assert mesh_name == 'Collagen'
  
  def test_invalid_id():
      mesh_name = mesh_client.get_mesh_name('34jkgfh')
      assert mesh_name is None
  
  
subject: Add test for invalid MESH ID