test/user: use local registry

Rework User tests to not depend on `app.autoAttach()` and global shared
registry of Models. Instead, each tests creates a fresh app instance
with a new in-memory datasource and a new set of Models.

test/user.test.js

@@ -1,11 +1,6 @@
 require('./support');
 var loopback = require('../');
 var User, AccessToken;
-var MailConnector = require('../lib/connectors/mail');
-
-var userMemory = loopback.createDataSource({
-  connector: 'memory',
-});
 
 describe('User', function() {
   var validCredentialsEmail = 'foo@bar.com';
@@ -21,44 +16,59 @@ describe('User', function() {
   var invalidCredentials = { email: 'foo1@bar.com', password: 'invalid' };
   var incompleteCredentials = { password: 'bar1' };
 
-  var defaultApp;
+  // Create a local app variable to prevent clashes with the global
+  // variable shared by all tests. While this should not be necessary if
+  // the tests were written correctly, it turns out that's not the case :(
+  var app;
 
-  beforeEach(function() {
-    // FIXME: [rfeng] Remove loopback.User.app so that remote hooks don't go
-    // to the wrong app instance
-    defaultApp = loopback.User.app;
-    loopback.User.app = null;
-    User = loopback.User.extend('TestUser', {}, { http: { path: 'test-users' }});
-    AccessToken = loopback.AccessToken.extend('TestAccessToken');
-    User.email = loopback.Email.extend('email');
-    loopback.autoAttach();
+  beforeEach(function setupAppAndModels(done) {
+    // override the global app object provided by test/support.js
+    // and create a local one that does not share state with other tests
+    app = loopback({ localRegistry: true, loadBuiltinModels: true });
+    app.dataSource('db', { connector: 'memory' });
+
+    // setup Email model, it's needed by User tests
+    app.dataSource('email', {
+      connector: loopback.Mail,
+      transports: [{ type: 'STUB' }],
+    });
+    var Email = app.registry.getModel('Email');
+    app.model(Email, { dataSource: 'email' });
+
+    // attach User and related models
+    User = app.registry.createModel('TestUser', {}, {
+      base: 'User',
+      http: { path: 'test-users' },
+    });
+    app.model(User, { dataSource: 'db' });
+
+    AccessToken = app.registry.getModel('AccessToken');
+    app.model(AccessToken, { dataSource: 'db' });
+
+    User.email = Email;
 
     // Update the AccessToken relation to use the subclass of User
     AccessToken.belongsTo(User, { as: 'user', foreignKey: 'userId' });
     User.hasMany(AccessToken, { as: 'accessTokens', foreignKey: 'userId' });
 
+    // Speed up the password hashing algorithm
+    // for tests using the built-in User model
+    User.settings.saltWorkFactor = 4;
+
     // allow many User.afterRemote's to be called
     User.setMaxListeners(0);
-  });
 
-  beforeEach(function(done) {
-    app.enableAuth();
+    app.enableAuth({ dataSource: 'db' });
     app.use(loopback.token({ model: AccessToken }));
     app.use(loopback.rest());
     app.model(User);
 
     User.create(validCredentials, function(err, user) {
+      if (err) return done(err);
       User.create(validCredentialsEmailVerified, done);
     });
   });
 
-  afterEach(function(done) {
-    loopback.User.app = defaultApp;
-    User.destroyAll(function(err) {
-      User.accessToken.destroyAll(done);
-    });
-  });
-
   describe('User.create', function() {
     it('Create a new user', function(done) {
       User.create({ email: 'f@b.com', password: 'bar' }, function(err, user) {
@@ -700,12 +710,19 @@ describe('User', function() {
   describe('User.login requiring realm', function() {
     var User, AccessToken;
 
-    before(function() {
-      User = loopback.User.extend('RealmUser', {},
-        { realmRequired: true, realmDelimiter: ':' });
-      AccessToken = loopback.AccessToken.extend('RealmAccessToken');
+    beforeEach(function() {
+      User = app.registry.createModel('RealmUser', {}, {
+        base: 'TestUser',
+        realmRequired: true,
+        realmDelimiter: ':',
+      });
 
-      loopback.autoAttach();
+      AccessToken = app.registry.createModel('RealmAccessToken', {}, {
+        base: 'AccessToken',
+      });
+
+      app.model(AccessToken, { dataSource: 'db' });
+      app.model(User, { dataSource: 'db' });
 
       // Update the AccessToken relation to use the subclass of User
       AccessToken.belongsTo(User, { as: 'user', foreignKey: 'userId' });
@@ -776,15 +793,6 @@ describe('User', function() {
       });
     });
 
-    afterEach(function(done) {
-      User.deleteAll({ realm: 'realm1' }, function(err) {
-        if (err) {
-          return done(err);
-        }
-        User.deleteAll({ realm: 'realm2' }, done);
-      });
-    });
-
     it('rejects a user by without realm', function(done) {
       User.login(credentialWithoutRealm, function(err, accessToken) {
         assert(err);
@@ -834,11 +842,11 @@ describe('User', function() {
     });
 
     describe('User.login with realmRequired but no realmDelimiter', function() {
-      before(function() {
+      beforeEach(function() {
         User.settings.realmDelimiter = undefined;
       });
 
-      after(function() {
+      afterEach(function() {
         User.settings.realmDelimiter = ':';
       });
 
@@ -1544,7 +1552,7 @@ describe('User', function() {
   describe('ctor', function() {
     it('exports default Email model', function() {
       expect(User.email, 'User.email').to.be.a('function');
-      expect(User.email.modelName, 'modelName').to.eql('email');
+      expect(User.email.modelName, 'modelName').to.eql('Email');
     });
 
     it('exports default AccessToken model', function() {