Test case to ensure dashboard.parse.com won't break (#1636)

* Test case to ensure dashboard.parse.com won't break

* Adds volatile classes concept for _PushStatus

* Fixes test

spec/helper.js

@@ -9,6 +9,7 @@ var facebook = require('../src/authDataManager/facebook');
 var ParseServer = require('../src/index').ParseServer;
 var path = require('path');
 var TestUtils = require('../src/index').TestUtils;
+var MongoStorageAdapter = require('../src/Adapters/Storage/Mongo/MongoStorageAdapter');
 
 var databaseURI = process.env.DATABASE_URI;
 var cloudMain = process.env.CLOUD_CODE_MAIN || './spec/cloud/main.js';
@@ -87,8 +88,29 @@ beforeEach(function(done) {
   return TestUtils.destroyAllDataPermanently().then(done, fail);
 });
 
+var mongoAdapter = new MongoStorageAdapter({
+  collectionPrefix: defaultConfiguration.collectionPrefix,
+  uri: databaseURI,
+})
+
 afterEach(function(done) {
-  Parse.User.logOut().then(() => {
+  mongoAdapter.getAllSchemas()
+  .then(allSchemas => {
+    allSchemas.forEach((schema) => {
+      var className = schema.className;
+      expect(className).toEqual({ asymmetricMatch: className => {
+        if (!className.startsWith('_')) {
+          return true;
+        } else {
+          // Other system classes will break Parse.com, so make sure that we don't save anything to _SCHEMA that will
+          // break it.
+          return ['_User', '_Installation', '_Role', '_Session', '_Product'].includes(className);
+        }
+      }});
+    });
+  })
+  .then(() => Parse.User.logOut())
+  .then(() => {
     return TestUtils.destroyAllDataPermanently();
   }).then(() => {
     done();