['labels', 'colors', 'series', 'options'].forEach(function (attr) {
      it('does not re-create the chart on ' + attr + ' not changed', function () {
        var markup = '<div style="width: 250px; height:120px">' +
          '<canvas class="chart chart-line" chart-data="data" chart-labels="labels" chart-series="series" ' +
            'chart-colors="colors" chart-options="options"></canvas></div>';