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();

src/Controllers/DatabaseController.js

@@ -345,7 +345,7 @@ DatabaseController.prototype.create = function(className, object, { acl } = {})
     return (isMaster ? Promise.resolve() : schemaController.validatePermission(className, aclGroup, 'create'))
     .then(() => this.handleRelationUpdates(className, null, object))
     .then(() => schemaController.enforceClassExists(className))
-    .then(() => schemaController.getOneSchema(className))
+    .then(() => schemaController.getOneSchema(className, true))
     .then(schema => this.adapter.createObject(className, object, schemaController, schema))
     .then(result => sanitizeDatabaseResult(originalObject, result.ops[0]));
   })

src/Controllers/SchemaController.js

@@ -93,6 +93,8 @@ const requiredColumns = Object.freeze({
 
 const systemClasses = Object.freeze(['_User', '_Installation', '_Role', '_Session', '_Product', '_PushStatus']);
 
+const volatileClasses = Object.freeze(['_PushStatus']);
+
 // 10 alpha numberic chars + uppercase
 const userIdRegex = /^[a-zA-Z0-9]{10}$/;
 // Anything that start with role
@@ -251,6 +253,15 @@ class SchemaController {
         this.data[schema.className] = schema.fields;
         this.perms[schema.className] = schema.classLevelPermissions;
       });
+      
+      // Inject the in-memory classes
+      volatileClasses.forEach(className => {
+        this.data[className] = injectDefaultSchema({
+          className,
+          fields: {},
+          classLevelPermissions: {}
+        });
+      });
     });
   }
 
@@ -259,7 +270,10 @@ class SchemaController {
     .then(allSchemas => allSchemas.map(injectDefaultSchema));
   }
 
-  getOneSchema(className) {
+  getOneSchema(className, allowVolatileClasses = false) {
+    if (allowVolatileClasses && volatileClasses.indexOf(className) > -1) {
+      return Promise.resolve(this.data[className]);
+    }
     return this._dbAdapter.getOneSchema(className)
     .then(injectDefaultSchema);
   }