Redmine

  $('#issue_assigned_to_id').find('option').first()

    // Browsers prefer option[label] over inner text, so remove the blank label.

    .removeAttr('label')

    .html(

      '<%= escape_javascript(

             @issue.category.try(:assigned_to).try(:name)).presence || ' '.html_safe %>');

  def test_update_form_for_new_issue_should_show_category_default_assignee_when_changing_category

    @request.session[:user_id] = 2

    post(

      :new,

      :params => {

        :project_id => 1,

        :issue => {

          :category_id => 1

        },

        :form_update_triggered_by => 'issue_category_id'

      },

      :xhr => true

    )

    assert_response :success

    # Browsers prefer option[label] over inner text, so the blank label must be removed.

    assert_includes @response.body, ".removeAttr('label')"

    assert_includes @response.body, "John Smith"

  end