Start adding tests

lib/dialects/abstract/connection-manager.js

@@ -19,7 +19,7 @@ ConnectionManager = function(dialect, sequelize) {
   this.dialect = dialect;
 
   if (config.pool) {
-    config.pool = _.extend({}, config.pool); // Make sure we don't modify the existing config object (user might re-use it)
+    config.pool = _.clone(config.pool); // Make sure we don't modify the existing config object (user might re-use it)
     config.pool =_.defaults(config.pool, defaultPoolingConfig, {
       validate: this.$validate.bind(this)
     }) ;

test/integration/dialects/abstract/connection-manager.test.js

+'use strict';
+
+var chai = require('chai')
+  , expect = chai.expect
+  , Support = require(__dirname + '/../../support')
+  , sinon = require('sinon')
+  , Config = require(__dirname + '/../../../config/config')
+  , ConnectionManager = require(__dirname + '/../../../../lib/dialects/abstract/connection-manager')
+  , Pooling = require('generic-pool');
+
+chai.config.includeStack = true;
+
+var baseConf = Config[Support.getTestDialect()];
+
+describe('Connction Manager', function() {
+
+  var sandbox;
+
+  beforeEach(function(){
+    sandbox = sinon.sandbox.create();
+  });
+
+  afterEach(function(){
+    sandbox.restore();
+  });
+
+  it('should initialize a single pool without replication', function() {
+    var options = {
+      pool: {}
+    };
+    var sequelize = Support.getSequelizeInstance(baseConf.database, baseConf.username, baseConf.password, options);
+    var connectionManager = new ConnectionManager(Support.getTestDialect(), sequelize);
+
+    var poolSpy = sinon.spy(Pooling, "Pool");
+    connectionManager.initPools();
+    expect(poolSpy.calledOnce).to.be.true;
+  });
+
+});