Added test to recreate early cron issue (#9668)

* Added test to recreate early cron issue

* Gave user extra time based on reverse timezone change

test/api/v3/unit/models/user.test.js

@@ -323,4 +323,48 @@ describe('User Model', () => {
       expect(user.achievements.beastMaster).to.not.equal(true);
     });
   });
+
+  context('days missed', () => {
+    // http://forbrains.co.uk/international_tools/earth_timezones
+    let user;
+
+    beforeEach(() => {
+      user = new User();
+    });
+
+    it('should not cron early when going back a timezone', () => {
+      const yesterday = moment('2017-12-05T00:00:00.000-06:00'); // 11 pm on 4 Texas
+      const timezoneOffset = moment().zone('-06:00').zone();
+      user.lastCron = yesterday;
+      user.preferences.timezoneOffset = timezoneOffset;
+
+      const today = moment('2017-12-06T00:00:00.000-06:00'); // 11 pm on 4 Texas
+      const req = {};
+      req.header = () => {
+        return timezoneOffset + 60;
+      };
+
+      const {daysMissed} = user.daysUserHasMissed(today, req);
+
+      expect(daysMissed).to.eql(0);
+    });
+
+    it('should not cron early when going back a timezone with a custom day start', () => {
+      const yesterday = moment('2017-12-05T02:00:00.000-08:00');
+      const timezoneOffset = moment().zone('-08:00').zone();
+      user.lastCron = yesterday;
+      user.preferences.timezoneOffset = timezoneOffset;
+      user.preferences.dayStart = 2;
+
+      const today = moment('2017-12-06T02:00:00.000-08:00');
+      const req = {};
+      req.header = () => {
+        return timezoneOffset + 60;
+      };
+
+      const {daysMissed} = user.daysUserHasMissed(today, req);
+
+      expect(daysMissed).to.eql(0);
+    });
+  });
 });