colossus/assets/scripts/bedabin.coffee

$ ->
  console.log('ready.')

  $('#report-benchmarks').on('change', ->
    url = '/api/benchmark/' + $('#report-benchmarks').val() + '/tests'
    $.get(url, (data) ->
      # clear old contents from the selector
      $('#report-tests').empty()
      # add new elements to the selector
      addOption(test) for test in data
    )
  )

addOption = (test) ->
  $('#report-tests').append(
    $('<option/>')
      .attr('value', test.id)
      .text(test.title)
  )