has-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')
, HasMany = require(__dirname + '/../../../lib/associations/has-many')
, current = Support.sequelize
, Promise = current.Promise;
describe(Support.getTestDialectTeaser('hasMany'), 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 });
User.hasMany(Task);
var user = User.build({
id: 42
}),
task1 = Task.build({
id: 15
}),
task2 = Task.build({
id: 16
});
beforeEach(function () {
this.findAll = stub(Task, 'findAll').returns(Promise.resolve([]));
this.update = stub(Task, 'update').returns(Promise.resolve([]));
});
afterEach(function () {
this.findAll.restore();
this.update.restore();
});
it('uses one update statement for addition', function() {
return user.setTasks([task1, task2]).bind(this). then(function() {
expect(this.findAll).to.have.been.calledOnce;
expect(this.update).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 () {
this.update.reset();
return user.setTasks(null);
}).then(function () {
expect(this.findAll).to.have.been.calledTwice;
expect(this.update).to.have.been.calledOnce;
});
});
});
describe('mixin', function () {
var User = current.define('User')
, Task = current.define('Task');
it('should mixin association methods', function () {
var as = Math.random().toString()
, association = new HasMany(User, Task, {as: as})
, obj = {};
association.mixin(obj);
expect(obj[association.accessors.get]).to.be.an('function');
expect(obj[association.accessors.set]).to.be.an('function');
expect(obj[association.accessors.addMultiple]).to.be.an('function');
expect(obj[association.accessors.add]).to.be.an('function');
expect(obj[association.accessors.remove]).to.be.an('function');
expect(obj[association.accessors.removeMultiple]).to.be.an('function');
expect(obj[association.accessors.hasSingle]).to.be.an('function');
expect(obj[association.accessors.hasAll]).to.be.an('function');
expect(obj[association.accessors.count]).to.be.an('function');
});
});
describe('get', function () {
var User = current.define('User', {})
, Task = current.define('Task', {})
, idA = Math.random().toString()
, idB = Math.random().toString()
, idC = Math.random().toString()
, foreignKey = 'user_id';
it('should fetch associations for a single instance', function () {
var findAll = stub(Task, 'findAll').returns(Promise.resolve([
Task.build({}),
Task.build({})
]))
, where = {}
, actual;
User.Tasks = User.hasMany(Task, {foreignKey: foreignKey});
actual = User.Tasks.get(User.build({id: idA}));
where[foreignKey] = idA;
expect(findAll).to.have.been.calledOnce;
expect(findAll.firstCall.args[0].where).to.deep.equal(where);
return actual.then(function (results) {
expect(results).to.be.an('array');
expect(results.length).to.equal(2);
}).finally(function () {
findAll.restore();
});
});
it('should fetch associations for multiple source instances', function () {
var findAll = stub(Task, 'findAll').returns(Promise.resolve([
Task.build({
'user_id': idA
}),
Task.build({
'user_id': idA
}),
Task.build({
'user_id': idA
}),
Task.build({
'user_id': idB
})
]))
, where = {}
, actual;
User.Tasks = User.hasMany(Task, {foreignKey: foreignKey});
actual = User.Tasks.get([
User.build({id: idA}),
User.build({id: idB}),
User.build({id: idC})
]);
where[foreignKey] = {
$in: [idA, idB, idC]
};
expect(findAll).to.have.been.calledOnce;
expect(findAll.firstCall.args[0].where).to.deep.equal(where);
return actual.then(function (result) {
expect(result).to.be.an('object');
expect(Object.keys(result)).to.deep.equal([idA, idB, idC]);
expect(result[idA].length).to.equal(3);
expect(result[idB].length).to.equal(1);
expect(result[idC].length).to.equal(0);
}).finally(function () {
findAll.restore();
});
});
});
});