[charts] Add test

packages/x-charts/src/LineChart/formatter.test.ts

@@ -0,0 +1,36 @@
+import { expect } from 'chai';
+import { FormatterParams } from '@mui/x-charts/models/seriesType/config';
+import lineFormatter from '@mui/x-charts/LineChart/formatter';
+
+const seriesOrder = ['id1'];
+const seriesDataset: FormatterParams<'line'>['series'] = {
+  id1: {
+    // useless info
+    type: 'line',
+    id: 'id1',
+    color: 'red',
+    // usefull info
+    dataKey: 'k',
+  },
+};
+const seriesData: FormatterParams<'line'>['series'] = {
+  id1: {
+    // useless info
+    type: 'line',
+    id: 'id1',
+    color: 'red',
+    // usefull info
+    data: [1, 2, 3],
+  },
+};
+
+const dataSet = [{ k: 1 }, { k: 2 }, { k: 3 }];
+
+describe.only('LineChart - formatter', () => {
+  describe('data from dataset', () => {
+    it('shoudld get data from the dataset', () => {
+      const results = lineFormatter({ seriesOrder, series: seriesDataset }, dataSet);
+      console.log(results);
+    });
+  });
+});