Push: Cleanup invalid device tokens (#4149)

* Adds collecting invalid / expired device tokens from GCM / APNS

* Cleanup invalid installations based on responses from the adapters

* Adds test for cleanup

* Adds tests for removal

spec/PushWorker.spec.js

@@ -1,6 +1,7 @@
 var PushWorker = require('../src').PushWorker;
 var PushUtils = require('../src/Push/utils');
 var Config = require('../src/Config');
+var { pushStatusHandler } = require('../src/StatusHandler');
 
 describe('PushWorker', () => {
   it('should run with small batch', (done) => {
@@ -156,4 +157,89 @@ describe('PushWorker', () => {
       expect(PushUtils.groupByLocaleIdentifier([])).toEqual({default: []});
     });
   });
+
+  describe('pushStatus', () => {
+    it('should remove invalid installations', (done) => {
+      const config = new Config('test');
+      const handler = pushStatusHandler(config);
+      const spy = spyOn(config.database, "update").and.callFake(() => {
+        return Promise.resolve();
+      });
+      handler.trackSent([
+        {
+          transmitted: false,
+          device: {
+            deviceToken: 1,
+            deviceType: 'ios',
+          },
+          response: { error: 'Unregistered' }
+        },
+        {
+          transmitted: true,
+          device: {
+            deviceToken: 10,
+            deviceType: 'ios',
+          },
+        },
+        {
+          transmitted: false,
+          device: {
+            deviceToken: 2,
+            deviceType: 'ios',
+          },
+          response: { error: 'NotRegistered' }
+        },
+        {
+          transmitted: false,
+          device: {
+            deviceToken: 3,
+            deviceType: 'ios',
+          },
+          response: { error: 'InvalidRegistration' }
+        },
+        {
+          transmitted: true,
+          device: {
+            deviceToken: 11,
+            deviceType: 'ios',
+          },
+        },
+        {
+          transmitted: false,
+          device: {
+            deviceToken: 4,
+            deviceType: 'ios',
+          },
+          response: { error: 'InvalidRegistration' }
+        },
+        {
+          transmitted: false,
+          device: {
+            deviceToken: 5,
+            deviceType: 'ios',
+          },
+          response: { error: 'InvalidRegistration' }
+        },
+        { // should not be deleted
+          transmitted: false,
+          device: {
+            deviceToken: 101,
+            deviceType: 'ios',
+          },
+          response: { error: 'invalid error...' }
+        }
+      ], true);
+      expect(spy).toHaveBeenCalled();
+      expect(spy.calls.count()).toBe(1);
+      const lastCall = spy.calls.mostRecent();
+      expect(lastCall.args[0]).toBe('_Installation');
+      expect(lastCall.args[1]).toEqual({
+        deviceToken: { '$in': [1,2,3,4,5] }
+      });
+      expect(lastCall.args[2]).toEqual({
+        deviceToken: { '__op': "Delete" }
+      });
+      done();
+    });
+  });
 });