Fix an issue with dialect.supports for abstract dialect being overwritten

lib/dialects/mariadb/index.js

@@ -11,9 +11,7 @@ var MariaDialect = function(sequelize) {
   this.connectionManager.initPools();
 };
 
-MariaDialect.prototype = _.defaults({
-	'LIMIT ON UPDATE': true
-}, MySQL.prototype);
+MariaDialect.prototype = MySQL.prototype;
 
 MariaDialect.prototype.Query = Query;
 

lib/dialects/mysql/index.js

@@ -11,7 +11,7 @@ var MysqlDialect = function(sequelize) {
   this.connectionManager.initPools();
 };
 
-MysqlDialect.prototype.supports = _.merge(Abstract.prototype.supports, {
+MysqlDialect.prototype.supports = _.merge(_.cloneDeep(Abstract.prototype.supports), {
   'VALUES ()': true,
   'LIMIT ON UPDATE': true,
   lock: true,

lib/dialects/postgres/index.js

@@ -11,7 +11,7 @@ var PostgresDialect = function(sequelize) {
   this.connectionManager.initPools();
 };
 
-PostgresDialect.prototype.supports = _.merge(Abstract.prototype.supports, {
+PostgresDialect.prototype.supports = _.merge(_.cloneDeep(Abstract.prototype.supports), {
   'RETURNING': true,
   'DEFAULT VALUES': true,
   schemas: true,

lib/dialects/sqlite/index.js

@@ -10,7 +10,7 @@ var SqliteDialect = function(sequelize) {
   this.connectionManager = new ConnectionManager(this, sequelize);
 };
 
-SqliteDialect.prototype.supports = _.merge(Abstract.prototype.supports, {
+SqliteDialect.prototype.supports = _.merge(_.cloneDeep(Abstract.prototype.supports), {
   'DEFAULT': false,
   'DEFAULT VALUES': true,
   index: {

test/associations/has-many.test.js

@@ -1297,7 +1297,7 @@ describe(Support.getTestDialectTeaser("HasMany"), function() {
       });
 
       it('makes join table non-paranoid by default', function () {
-        var paranoidSequelize = new Sequelize('','','', {
+        var paranoidSequelize = Support.createSequelizeInstance({
             define: {
               paranoid: true
             }

test/sequelize.test.js

@@ -32,7 +32,6 @@ describe(Support.getTestDialectTeaser("Sequelize"), function () {
           , connectionSpy = ConnectionManager.prototype.connect = chai.spy(ConnectionManager.prototype.connect);
 
         var sequelize = Support.createSequelizeInstance({
-          dialect: dialect,
           pool: {
             minConnections: 2
           }

test/sequelize.transaction.test.js

@@ -87,7 +87,7 @@ describe(Support.getTestDialectTeaser("Sequelize#transaction"), function () {
       // how could we enforce an authentication error in sqlite?
     } else {
       it("gets triggered once an error occurs", function(done) {
-        var sequelize = Support.createSequelizeInstance({ dialect: Support.getTestDialect() });
+        var sequelize = Support.createSequelizeInstance();
 
         // lets overwrite the host to get an error
         sequelize.config.username = 'foobarbaz';

test/support.js

@@ -68,7 +68,7 @@ var Support = {
 
   createSequelizeInstance: function(options) {
     options = options || {};
-    options.dialect = options.dialect || 'mysql';
+    options.dialect = this.getTestDialect();
 
     var config = Config[options.dialect];
 
@@ -187,7 +187,7 @@ var Support = {
   }
 };
 
-var sequelize = Support.createSequelizeInstance({ dialect: Support.getTestDialect() });
+var sequelize = Support.createSequelizeInstance();
 
 // For Postgres' HSTORE functionality and to properly execute it's commands we'll need this...
 before(function() {

test/timezone.test.js

@@ -16,7 +16,6 @@ if (dialect !== 'sqlite') {
     beforeEach(function () {
       this.sequelizeWithTimezone = Support.createSequelizeInstance({
         timezone: '+07:00',
-        dialect: dialect
       });
     });