IssuesControllerTest#test_index_sort_by_total_estimated_hours tries to test if the issues list is sorted by estimated hours, but it actually does not test anything.

In test/fixtures/issues.yml, all objects don't have estimate_hours value. As a result, the content of the array @hours@ is always [nil, nil, nil, nil. nil]. Since all values in the array are the same, you cannot check whether the sorting works well or not.

  def test_index_sort_by_total_estimated_hours
    get :index, :params => {
        :sort => 'total_estimated_hours:desc'
      }
    assert_response :success
    hours = issues_in_list.map(&:total_estimated_hours)
    assert_equal hours.sort.reverse, hours
  end