chore: add unit test

Signed-off-by: hainenber <dotronghai96@gmail.com>

superset-frontend/plugins/legacy-plugin-chart-parallel-coordinates/src/transformProps.ts

@@ -38,7 +38,7 @@ export default function transformProps(chartProps: ChartProps) {
     includeSeries,
     isDarkMode: isThemeDark(theme),
     linearColorScheme,
-    metrics: metrics.map((m: { label?: string } | string) =>
+    metrics: (metrics ?? []).map((m: { label?: string } | string) =>
       typeof m === 'string' ? m : m.label || m,
     ),
     colorMetric: secondaryMetric?.label || secondaryMetric,

superset-frontend/plugins/legacy-plugin-chart-parallel-coordinates/test/transformProps.test.ts

@@ -0,0 +1,22 @@
+import { ChartProps } from '@superset-ui/core';
+import transformProps from '../src/transformProps';
+
+const createProps = () =>
+  ({
+    width: 800,
+    height: 600,
+    formData: {
+      includeSeries: false,
+      linearColorScheme: 'superset_seq_1',
+      metrics: undefined,
+      secondaryMetric: 'sum__SP_POP_TOTL',
+      series: 'country_name',
+      showDatatable: false,
+    },
+    queriesData: [{ data: [{ country_id: 'FRA', metric: 10 }] }],
+    theme: {},
+  }) as unknown as ChartProps;
+
+test('do not crash on undefined metrics', () => {
+  expect(() => transformProps(createProps())).not.toThrow();
+});