Fix csv export file name

- Provide a filename to the download property

ee/app/assets/javascripts/security_dashboard/components/csv_export_button.vue

@@ -10,6 +10,7 @@ import {
 import { s__ } from '~/locale';
 import createFlash from '~/flash';
 import axios from '~/lib/utils/axios_utils';
+import { formatDate } from '~/lib/utils/datetime_utility';
 import pollUntilComplete from '~/lib/utils/poll_until_complete';
 
 export const STORAGE_KEY = 'vulnerability_csv_export_popover_dismissed';
@@ -54,7 +55,7 @@ export default {
         .then(({ data }) => pollUntilComplete(data._links.self))
         .then(({ data }) => {
           const anchor = document.createElement('a');
-          anchor.download = '';
+          anchor.download = `csv-export-${formatDate(new Date(), 'isoDateTime')}.csv`;
           anchor.href = data._links.download;
           anchor.click();
         })

ee/spec/frontend/security_dashboard/components/csv_export_button_spec.js

@@ -10,6 +10,9 @@ import CsvExportButton, {
 import axios from '~/lib/utils/axios_utils';
 
 jest.mock('~/flash');
+jest.mock('~/lib/utils/datetime_utility', () => ({
+  formatDate: () => '2020-04-12-10T14_32_35',
+}));
 
 const vulnerabilitiesExportEndpoint = `${TEST_HOST}/vulnerability_findings.csv`;
 
@@ -81,7 +84,9 @@ describe('Csv Button Export', () => {
       return axios.waitForAll().then(() => {
         expect(spy).toHaveBeenCalledWith('a');
         expect(downloadAnchor.href).toContain(downloadLink);
-        expect(downloadAnchor.hasAttribute('download')).toBe(true);
+        expect(downloadAnchor.getAttribute('download')).toBe(
+          `csv-export-2020-04-12-10T14_32_35.csv`,
+        );
         expect(downloadAnchor.click).toHaveBeenCalled();
       });
     });