connection-manager.test.js
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'use strict';
/* jshint -W030 */
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')
, _ = require('lodash')
, Promise = require(__dirname + '/../../../../lib/promise');
var baseConf = Config[Support.getTestDialect()];
var poolEntry = {
host: baseConf.host,
port: baseConf.port,
pool: {}
};
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 = {
replication: null
};
var sequelize = Support.createSequelizeInstance(options);
var connectionManager = new ConnectionManager(Support.getTestDialect(), sequelize);
var poolSpy = sandbox.spy(Pooling, 'Pool');
connectionManager.initPools();
expect(poolSpy.calledOnce).to.be.true;
});
it('should initialize a multiple pools with replication', function() {
var options = {
replication: {
write: _.clone(poolEntry),
read: [_.clone(poolEntry), _.clone(poolEntry)]
}
};
var sequelize = Support.createSequelizeInstance(options);
var connectionManager = new ConnectionManager(Support.getTestDialect(), sequelize);
var poolSpy = sandbox.spy(Pooling, 'Pool');
connectionManager.initPools();
expect(poolSpy.calledTwice).to.be.true;
});
it('should round robin calls to the read pool', function() {
if (Support.getTestDialect() === 'sqlite') {
return;
}
var slave1 = _.clone(poolEntry);
var slave2 = _.clone(poolEntry);
slave1.host = 'slave1';
slave2.host = 'slave2';
var options = {
replication: {
write: _.clone(poolEntry),
read: [slave1, slave2]
}
};
var sequelize = Support.createSequelizeInstance(options);
var connectionManager = new ConnectionManager(Support.getTestDialect(), sequelize);
var resolvedPromise = new Promise(function(resolve) {
resolve({
queryType: 'read'
});
});
var connectStub = sandbox.stub(connectionManager, '$connect').returns(resolvedPromise);
connectionManager.initPools();
var queryOptions = {
priority: 0,
type: 'SELECT',
useMaster: false
};
var _getConnection = _.bind(connectionManager.getConnection, connectionManager, queryOptions);
return _getConnection()
.then(_getConnection)
.then(_getConnection)
.then(function checkPoolHosts() {
chai.expect(connectStub.calledThrice).to.be.true;
var calls = connectStub.getCalls();
chai.expect(calls[0].args[0].host).to.eql('slave1');
chai.expect(calls[1].args[0].host).to.eql('slave2');
chai.expect(calls[2].args[0].host).to.eql('slave1');
});
});
it('should allow forced reads from the write pool', function() {
var master = _.clone(poolEntry);
master.host = 'the-boss';
var options = {
replication: {
write: master,
read: [_.clone(poolEntry)]
}
};
var sequelize = Support.createSequelizeInstance(options);
var connectionManager = new ConnectionManager(Support.getTestDialect(), sequelize);
var resolvedPromise = new Promise(function(resolve) {
resolve({
queryType: 'read'
});
});
var connectStub = sandbox.stub(connectionManager, '$connect').returns(resolvedPromise);
connectionManager.initPools();
var queryOptions = {
priority: 0,
type: 'SELECT',
useMaster: true
};
return connectionManager.getConnection(queryOptions)
.then(function checkPoolHosts() {
chai.expect(connectStub.calledOnce).to.be.true;
var calls = connectStub.getCalls();
chai.expect(calls[0].args[0].host).to.eql('the-boss');
});
});
});