fix(sunburst): remove label text outline in dark theme (#39774)

superset-frontend/plugins/plugin-chart-echarts/test/Sunburst/transformProps.test.ts

@@ -0,0 +1,53 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+import { ChartProps } from '@superset-ui/core';
+import { supersetTheme } from '@apache-superset/core/theme';
+import { EchartsSunburstChartProps } from '../../src/Sunburst/types';
+import transformProps from '../../src/Sunburst/transformProps';
+
+const formData = {
+  colorScheme: 'bnbColors',
+  datasource: '3__table',
+  groupby: ['category'],
+  metric: 'sum__value',
+};
+
+const chartProps = new ChartProps({
+  formData,
+  width: 800,
+  height: 600,
+  queriesData: [
+    {
+      data: [
+        { category: 'A', sum__value: 10 },
+        { category: 'B', sum__value: 20 },
+      ],
+    },
+  ],
+  theme: supersetTheme,
+});
+
+test('series label has no textBorderColor or textBorderWidth', () => {
+  const { echartOptions } = transformProps(
+    chartProps as EchartsSunburstChartProps,
+  );
+  const series = (echartOptions as any).series[0];
+  expect(series.label).not.toHaveProperty('textBorderColor');
+  expect(series.label).not.toHaveProperty('textBorderWidth');
+});