Update URL date params properly

- This updates the merged_at_after and
merged_at_before URL params with a date string instead of an object

ee/app/assets/javascripts/analytics/productivity_analytics/store/modules/filters/actions.js

+import dateFormat from 'dateformat';
 import { historyPushState } from '~/lib/utils/common_utils';
 import { setUrlParams } from '~/lib/utils/url_utility';
+import { beginOfDayTime, endOfDayTime } from '~/lib/utils/datetime_utility';
 import * as types from './mutation_types';
 import { chartKeys } from '../../../constants';
+import { dateFormats } from '../../../../shared/constants';
 
 export const setInitialData = ({ commit, dispatch }, { skipFetch = false, data }) => {
   commit(types.SET_INITIAL_DATA, data);
@@ -77,7 +80,12 @@ export const setFilters = (
 export const setDateRange = ({ commit, dispatch }, { startDate, endDate }) => {
   commit(types.SET_DATE_RANGE, { startDate, endDate });
 
-  historyPushState(setUrlParams({ merged_at_after: startDate, merged_at_before: endDate }));
+  const mergedAtAfter = `${dateFormat(startDate, dateFormats.isoDate)}${beginOfDayTime}`;
+  const mergedAtBefore = `${dateFormat(endDate, dateFormats.isoDate)}${endOfDayTime}`;
+
+  historyPushState(
+    setUrlParams({ merged_at_after: mergedAtAfter, merged_at_before: mergedAtBefore }),
+  );
 
   dispatch('charts/resetMainChartSelection', true, { root: true });
 

ee/spec/frontend/analytics/productivity_analytics/store/modules/filters/actions_spec.js

@@ -11,9 +11,8 @@ jest.mock('~/lib/utils/url_utility');
 
 describe('Productivity analytics filter actions', () => {
   let store;
-  const currentYear = new Date().getFullYear();
-  const startDate = new Date(currentYear, 8, 1);
-  const endDate = new Date(currentYear, 8, 7);
+  const startDate = new Date('2019-09-01');
+  const endDate = new Date('2019-09-07');
   const groupNamespace = 'gitlab-org';
   const projectPath = 'gitlab-org/gitlab-test';
   const initialData = {
@@ -250,8 +249,8 @@ describe('Productivity analytics filter actions', () => {
         .setDateRange(store, { startDate, endDate })
         .then(() => {
           expect(setUrlParams).toHaveBeenCalledWith({
-            merged_at_after: startDate,
-            merged_at_before: endDate,
+            merged_at_after: '2019-09-01T00:00:00Z',
+            merged_at_before: '2019-09-07T23:59:59Z',
           });
 
           expect(historyPushState).toHaveBeenCalled();