Fix cron not running if previous run failed (#13892)

* catch issue where cron wouldn’t run bc previous run failed

* add some more tests for cron middleware

* fix lint

test/api/unit/middlewares/cronMiddleware.js

@@ -128,6 +128,22 @@ describe('cron middleware', () => {
     });
   });
 
+  it('runs cron if previous cron was incomplete', async () => {
+    user.lastCron = moment(new Date()).subtract({ days: 1 });
+    user.auth.timestamps.loggedin = moment(new Date()).subtract({ days: 4 });
+    const now = new Date();
+    await user.save();
+
+    await new Promise((resolve, reject) => {
+      cronMiddleware(req, res, err => {
+        if (err) return reject(err);
+        expect(moment(now).isSame(user.lastCron, 'day'));
+        expect(moment(now).isSame(user.auth.timestamps.loggedin, 'day'));
+        return resolve();
+      });
+    });
+  });
+
   it('updates user.auth.timestamps.loggedin and lastCron', async () => {
     user.lastCron = moment(new Date()).subtract({ days: 2 });
     const now = new Date();
@@ -293,4 +309,33 @@ describe('cron middleware', () => {
       });
     });
   });
+
+  it('cron should not run more than once', async () => {
+    user.lastCron = moment(new Date()).subtract({ days: 2 });
+    await user.save();
+
+    sandbox.spy(cronLib, 'cron');
+
+    await Promise.all([new Promise((resolve, reject) => {
+      cronMiddleware(req, res, err => {
+        if (err) return reject(err);
+        return resolve();
+      });
+    }), new Promise((resolve, reject) => {
+      cronMiddleware(req, res, err => {
+        if (err) return reject(err);
+        return resolve();
+      });
+    }), new Promise((resolve, reject) => {
+      setTimeout(() => {
+        cronMiddleware(req, res, err => {
+          if (err) return reject(err);
+          return resolve();
+        });
+      }, 400);
+    }),
+    ]);
+
+    expect(cronLib.cron).to.be.calledOnce;
+  });
 });

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

@@ -811,6 +811,16 @@ describe('User Model', () => {
       expect(daysMissed).to.eql(5);
     });
 
+    it('correctly handles a cron that did not complete', () => {
+      const now = moment();
+      user.lastCron = moment(now).subtract(2, 'days');
+      user.auth.timestamps.loggedIn = moment(now).subtract(5, 'days');
+
+      const { daysMissed } = user.daysUserHasMissed(now);
+
+      expect(daysMissed).to.eql(5);
+    });
+
     it('uses timezone from preferences to calculate days missed', () => {
       const now = moment('2017-07-08 01:00:00Z');
       user.lastCron = moment('2017-07-04 13:00:00Z');