old_contents: # coding: utf-8
  import pytest
  from mmvdApp.utils import objective_function
  from mmvdApp.utils import valid_solution
  
  
  @pytest.mark.utils
  @pytest.mark.linprog
  def test_objective_function(states1):
      """
      Test if ``utils.linprog.objective_function`` correctly calculates expected
      objective function value.
      """
      assert objective_function(states1) == 17
  
  
  @pytest.mark.utils
  @pytest.mark.linprog
  def test_solution_validity(states1, order1, drop_zone1):
      """
      Test if ``utils.linprog.valid_solution`` correctly checks for valid
      solution.
      """
      # cut order in half because states1 is intended only for first 3 products
      order = order1[0:3]
  
      assert valid_solution(states1, order, drop_zone1)
  
      # check for valid solution when one product isn't returned
      assert not valid_solution(states1[0:-1], order, drop_zone1)
  
new_contents: # coding: utf-8
  import pytest
  from mmvdApp.utils import objective_function
  from mmvdApp.utils import valid_solution
  from mmvdApp.utils import InvalidOrderException
  
  
  @pytest.mark.utils
  @pytest.mark.linprog
  def test_objective_function(states1):
      """
      Test if ``utils.linprog.objective_function`` correctly calculates expected
      objective function value.
      """
      assert objective_function(states1) == 17
  
  
  @pytest.mark.utils
  @pytest.mark.linprog
  def test_solution_validity(states1, order1, drop_zone1):
      """
      Test if ``utils.linprog.valid_solution`` correctly checks for valid
      solution.
      """
      # cut order in half because states1 is intended only for first 3 products
      order = order1[0:3]
  
      assert valid_solution(states1, order, drop_zone1)
  
      # check for valid solution when one product isn't returned
      with pytest.raises(InvalidOrderException):
          valid_solution(states1[0:-1], order, drop_zone1)
  
subject: Test missing checking for InvalidOrderException raised