Redmine

          ancestors = []

            # Keep the first `level` ancestors to identify the displayed parent for collapse/expand.

            ancestors.slice!(level..)

              if ancestors.any?

                gantt_project_row_key(ancestors.last)

            ancestors << project

  test "project rows should reference their nearest displayed ancestor across every pane" do

    # Project hierarchy (all projects are public unless marked private):

    # root

    # |-- hidden (private)

    # |   `-- hidden_child (private)

    # |       `-- descendant

    # |           `-- child

    # `-- sibling

    # hidden_root (private)

    # `-- other_root

    #     `-- other_child

    root = Project.generate!

    hidden = Project.generate!(:parent_id => root.id, :is_public => false)

    hidden_child = Project.generate!(:parent_id => hidden.id, :is_public => false)

    descendant = Project.generate!(:parent_id => hidden_child.id)

    child = Project.generate!(:parent_id => descendant.id)

    sibling = Project.generate!(:parent_id => root.id)

    hidden_root = Project.generate!(:is_public => false)

    other_root = Project.generate!(:parent_id => hidden_root.id)

    other_child = Project.generate!(:parent_id => other_root.id)

    # Expected parents in the displayed tree; nil means a root row.

    expected_parents = {

      root => nil,

      descendant => root,

      child => descendant,

      sibling => root,

      other_root => nil,

      other_child => other_root

    }

    # Give each expected project an issue so it is included in the Gantt chart.

    expected_parents.each_key {|project| Issue.generate!(:project => project)}

    # Use a non-admin user with no membership in the private projects.

    # Render a cross-project Gantt chart with a status column.

    User.current = User.find(2)

    create_gantt(nil)

    @gantt.query.column_names = [:status]

    [

      @gantt.subjects,

      @gantt.lines,

      @gantt.selected_column_content(:column => @gantt.query.columns.last)

    ].each do |html|

      # Private projects must not have rows in any pane.

      [hidden, hidden_child, hidden_root].each do |project|

        assert_select_in html, "[data-gantt-row-key=project-#{project.id}]", 0

      end

      expected_parents.each do |project, expected_parent|

        assert_select_in html, "[data-gantt-row-key=project-#{project.id}]", 1 do |rows|

          if expected_parent

            assert_equal "project-#{expected_parent.id}", rows.first['data-gantt-parent-row-key']

          else

            assert_nil rows.first['data-gantt-parent-row-key']

          end

        end

      end

    end

  end