cls.test.js
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'use strict';
const chai = require('chai'),
expect = chai.expect,
Support = require(__dirname + '/support'),
Sequelize = Support.Sequelize,
Promise = Sequelize.Promise,
cls = require('continuation-local-storage'),
current = Support.sequelize;
if (current.dialect.supports.transactions) {
describe(Support.getTestDialectTeaser('Continuation local storage'), () => {
before(function() {
this.thenOriginal = Promise.prototype.then;
Sequelize.useCLS(cls.createNamespace('sequelize'));
});
after(() => {
delete Sequelize._cls;
});
beforeEach(function() {
return Support.prepareTransactionTest(this.sequelize).bind(this).then(function(sequelize) {
this.sequelize = sequelize;
this.ns = cls.getNamespace('sequelize');
this.User = this.sequelize.define('user', {
name: Sequelize.STRING
});
return this.sequelize.sync({ force: true });
});
});
describe('context', () => {
it('supports several concurrent transactions', function() {
let t1id, t2id;
const self = this;
return Promise.join(
this.sequelize.transaction(() => {
t1id = self.ns.get('transaction').id;
return Promise.resolve();
}),
this.sequelize.transaction(() => {
t2id = self.ns.get('transaction').id;
return Promise.resolve();
}),
() => {
expect(t1id).to.be.ok;
expect(t2id).to.be.ok;
expect(t1id).not.to.equal(t2id);
}
);
});
it('supports nested promise chains', function() {
const self = this;
return this.sequelize.transaction(() => {
const tid = self.ns.get('transaction').id;
return self.User.findAll().then(() => {
expect(self.ns.get('transaction').id).to.be.ok;
expect(self.ns.get('transaction').id).to.equal(tid);
});
});
});
it('does not leak variables to the outer scope', function() {
// This is a little tricky. We want to check the values in the outer scope, when the transaction has been successfully set up, but before it has been comitted.
// We can't just call another function from inside that transaction, since that would transfer the context to that function - exactly what we are trying to prevent;
const self = this;
let transactionSetup = false,
transactionEnded = false;
this.sequelize.transaction(() => {
transactionSetup = true;
return Promise.delay(500).then(() => {
expect(self.ns.get('transaction')).to.be.ok;
transactionEnded = true;
});
});
return new Promise(resolve => {
// Wait for the transaction to be setup
const interval = setInterval(() => {
if (transactionSetup) {
clearInterval(interval);
resolve();
}
}, 200);
}).bind(this).then(function() {
expect(transactionEnded).not.to.be.ok;
expect(this.ns.get('transaction')).not.to.be.ok;
// Just to make sure it didn't change between our last check and the assertion
expect(transactionEnded).not.to.be.ok;
});
});
it('does not leak variables to the following promise chain', function() {
return this.sequelize.transaction(() => {
return Promise.resolve();
}).bind(this).then(function() {
expect(this.ns.get('transaction')).not.to.be.ok;
});
});
it('does not leak outside findOrCreate', function() {
const self = this;
return this.User.findOrCreate({
where: {
name: 'Kafka'
},
logging(sql) {
if (/default/.test(sql)) {
throw new Error('The transaction was not properly assigned');
}
}
}).then(() => {
return self.User.findAll();
});
});
});
describe('sequelize.query integration', () => {
it('automagically uses the transaction in all calls', function() {
const self = this;
return this.sequelize.transaction(() => {
return self.User.create({ name: 'bob' }).then(() => {
return Promise.all([
expect(self.User.findAll({ transaction: null })).to.eventually.have.length(0),
expect(self.User.findAll({})).to.eventually.have.length(1)
]);
});
});
});
});
it('bluebird patch is applied', function() {
expect(Promise.prototype.then).to.be.a('function');
expect(this.thenOriginal).to.be.a('function');
expect(Promise.prototype.then).not.to.equal(this.thenOriginal);
});
it('CLS namespace is stored in Sequelize._cls', function() {
expect(Sequelize._cls).to.equal(this.ns);
});
});
}