Expose DatabaseAdapter to simplify application tests (#1121)

* Move helper.clearData to DatabaseAdapter. Expose DatabaseAdapter in index

* fix indentation

* Export DatabaseAdapter in index.js

* Rename clearData to destroyAllDataPermanently. Only export destroyAllDataPermanently from DatabaseAdapter. Update helper

* Expose wrapped TestUtils from index.js. TestUtils exposed select functions from other modules, only in test environment

Author: steven-supersolid

spec/helper.js

@@ -8,6 +8,7 @@ var express = require('express');
 var facebook = require('../src/authDataManager/facebook');
 var ParseServer = require('../src/index').ParseServer;
 var path = require('path');
+var TestUtils = require('../src/index').TestUtils;
 
 var databaseURI = process.env.DATABASE_URI;
 var cloudMain = process.env.CLOUD_CODE_MAIN || './spec/cloud/main.js';
@@ -88,7 +89,7 @@ beforeEach(function(done) {
 
 afterEach(function(done) {
   Parse.User.logOut().then(() => {
-    return clearData();
+    return TestUtils.destroyAllDataPermanently();
   }).then(() => {
     done();
   }, (error) => {
@@ -232,14 +233,6 @@ function mockFacebook() {
   return facebook;
 }
 
-function clearData() {
-  var promises = [];
-  for (var conn in DatabaseAdapter.dbConnections) {
-    promises.push(DatabaseAdapter.dbConnections[conn].deleteEverything());
-  }
-  return Promise.all(promises);
-}
-
 // This is polluting, but, it makes it way easier to directly port old tests.
 global.Parse = Parse;
 global.TestObject = TestObject;

src/DatabaseAdapter.js

@@ -49,6 +49,18 @@ function clearDatabaseSettings() {
   appDatabaseOptions = {};
 }
 
+//Used by tests
+function destroyAllDataPermanently() {
+  if (process.env.TESTING) {
+    var promises = [];
+    for (var conn in dbConnections) {
+      promises.push(dbConnections[conn].deleteEverything());
+    }
+    return Promise.all(promises);
+  }
+  throw 'Only supported in test environment';
+}
+
 function getDatabaseConnection(appId: string, collectionPrefix: string) {
   if (dbConnections[appId]) {
     return dbConnections[appId];
@@ -71,5 +83,6 @@ module.exports = {
   setAppDatabaseOptions: setAppDatabaseOptions,
   setAppDatabaseURI: setAppDatabaseURI,
   clearDatabaseSettings: clearDatabaseSettings,
+  destroyAllDataPermanently: destroyAllDataPermanently,
   defaultDatabaseURI: databaseURI
 };

src/TestUtils.js

@@ -0,0 +1,15 @@
+import { destroyAllDataPermanently } from './DatabaseAdapter';
+
+let unsupported = function() {
+  throw 'Only supported in test environment';
+};
+
+let _destroyAllDataPermanently;
+if (process.env.TESTING) {
+  _destroyAllDataPermanently = destroyAllDataPermanently;
+} else {
+  _destroyAllDataPermanently = unsupported;
+}
+
+export default {
+    destroyAllDataPermanently: _destroyAllDataPermanently};

src/index.js

@@ -2,6 +2,7 @@ import winston           from 'winston';
 import ParseServer       from './ParseServer';
 import S3Adapter         from 'parse-server-s3-adapter'
 import FileSystemAdapter from 'parse-server-fs-adapter'
+import TestUtils         from './TestUtils';
 import { useExternal }   from './deprecated'
 
 // Factory function
@@ -15,4 +16,4 @@ _ParseServer.createLiveQueryServer = ParseServer.createLiveQueryServer;
 let GCSAdapter = useExternal('GCSAdapter', 'parse-server-gcs-adapter');
 
 export default ParseServer;
-export { S3Adapter, GCSAdapter, FileSystemAdapter, _ParseServer as ParseServer };
+export { S3Adapter, GCSAdapter, FileSystemAdapter, TestUtils, _ParseServer as ParseServer };