belongs-to-many.test.js
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'use strict';
/* jshint -W030 */
var chai = require('chai')
, sinon = require('sinon')
, expect = chai.expect
, stub = sinon.stub
, Support = require(__dirname + '/../support')
, DataTypes = require(__dirname + '/../../../lib/data-types')
, current = Support.sequelize
, Promise = current.Promise;
describe(Support.getTestDialectTeaser('belongsToMany'), function() {
describe('optimizations using bulk create, destroy and update', function() {
var User = current.define('User', { username: DataTypes.STRING })
, Task = current.define('Task', { title: DataTypes.STRING })
, UserTasks = current.define('UserTasks', {});
User.belongsToMany(Task, { through: UserTasks });
Task.belongsToMany(User, { through: UserTasks });
var user = User.build({
id: 42
}),
task1 = Task.build({
id: 15
}),
task2 = Task.build({
id: 16
});
beforeEach(function () {
this.findAll = stub(UserTasks, 'findAll').returns(Promise.resolve([]));
this.bulkCreate = stub(UserTasks, 'bulkCreate').returns(Promise.resolve([]));
this.destroy = stub(UserTasks, 'destroy').returns(Promise.resolve([]));
});
afterEach(function () {
this.findAll.restore();
this.bulkCreate.restore();
this.destroy.restore();
});
it('uses one insert into statement', function() {
return user.setTasks([task1, task2]).bind(this).then(function () {
expect(this.findAll).to.have.been.calledOnce;
expect(this.bulkCreate).to.have.been.calledOnce;
});
});
it('uses one delete from statement', function() {
this.findAll
.onFirstCall().returns(Promise.resolve([]))
.onSecondCall().returns(Promise.resolve([
{ userId: 42, taskId: 15 },
{ userId: 42, taskId: 16 }
]));
return user.setTasks([task1, task2]).bind(this).then(function () {
return user.setTasks(null);
}).then(function () {
expect(this.findAll).to.have.been.calledTwice;
expect(this.destroy).to.have.been.calledOnce;
});
});
});
});