chore: Add an option to download CSAT Reports (#4694)

app/javascript/dashboard/helper/specs/downloadHelper.spec.js

@@ -0,0 +1,29 @@
+import { downloadCsvFile, generateFileName } from '../downloadHelper';
+
+const fileName = 'test.csv';
+const fileData = `Agent name,Conversations count,Avg first response time (Minutes),Avg resolution time (Minutes)
+Pranav,36,114,28411`;
+
+describe('#downloadCsvFile', () => {
+  it('should download the csv file', () => {
+    const link = {
+      click: jest.fn(),
+    };
+    jest.spyOn(document, 'createElement').mockImplementation(() => link);
+
+    downloadCsvFile(fileName, fileData);
+    expect(link.download).toEqual(fileName);
+    expect(link.href).toEqual(
+      `data:text/csv;charset=utf-8,${encodeURI(fileData)}`
+    );
+    expect(link.click).toHaveBeenCalledTimes(1);
+  });
+});
+
+describe('#generateFileName', () => {
+  it('should generate the correct file name', () => {
+    expect(generateFileName({ type: 'csat', to: 1652812199 })).toEqual(
+      'csat-report-17-05-2022.csv'
+    );
+  });
+});