     t.ok col_dict = cols('cols', ['alpha', 'beta']), 'create cols'
     t.equal col_dict.layout, vector.axis.across, 'x axis'
 
-    t.ok col_tags = render_mock(col_dict).body.body, 'render cols'
     t.ok tags = render_mock(col_dict).body, 'render cols'
     t.equal get_label(tags), 'cols', 'col label'
     t.ok col_tags = tags.body, 'extract cols'

    t.ok row_dict = rows('rows', ['alpha', 'beta']), 'create rows'
    t.equal row_dict.layout, vector.axis.down, 'y axis'

    t.ok row_tags = render_mock(row_dict).body.body, 'render rows'
    t.ok tags = render_mock(row_dict).body, 'render rows'
    t.equal get_label(tags), 'rows', 'row label'
    t.ok row_tags = tags.body, 'extract rows'

    t.equal get_label(body), header._LABEL, 'header label'
    t.end()

  test "render svg", (t) ->
    t.ok row_dict = rows('rows', ['alpha', 'beta']), 'create rows'
    t.equal row_dict.layout, vector.axis.down, 'y axis'

    t.ok tags = render_mock(row_dict).body, 'render rows'
    t.end()

  test "render buttons", (t) ->
    t.end()

  test "render name", (t) ->
