) {
                var chart = testHelper.create(echarts, `main${i}`, {
                    title: [
                        `Pie with pad angle of main${i}`,
                        `padAngle is ${seriesList[i].padAngle}`,
                        `minAngle is ${seriesList[i].minAngle}`,
                    ],
                    option: {
                        tooltip: {
                            trigger: 'item'
                        },
                        series: [
                            s