loopback-datasource-juggler/test/mixins.test.js

96 lines
2.6 KiB
JavaScript

// This test written in mocha+should.js
var should = require('./init.js');
var jdb = require('../');
var ModelBuilder = jdb.ModelBuilder;
var DataSource = jdb.DataSource;
var Memory = require('../lib/connectors/memory');
var modelBuilder = new ModelBuilder();
var mixins = modelBuilder.mixins;
function timestamps(Model, options) {
Model.defineProperty('createdAt', { type: Date });
Model.defineProperty('updatedAt', { type: Date });
var originalBeforeSave = Model.beforeSave;
Model.beforeSave = function(next, data) {
Model.applyTimestamps(data, this.isNewRecord());
if (data.createdAt) {
this.createdAt = data.createdAt;
}
if (data.updatedAt) {
this.updatedAt = data.updatedAt;
}
if (originalBeforeSave) {
originalBeforeSave.apply(this, arguments);
} else {
next();
}
};
Model.applyTimestamps = function(data, creation) {
data.updatedAt = new Date();
if (creation) {
data.createdAt = data.updatedAt;
}
};
}
mixins.define('TimeStamp', timestamps);
describe('Model class', function () {
it('should define mixins', function() {
mixins.define('Example', function(Model, options) {
Model.prototype.example = function() {
return options;
};
});
mixins.define('Demo', function(Model, options) {
Model.demoMixin = options.ok;
});
});
it('should apply a mixin class', function() {
var Address = modelBuilder.define('Address', {
street: { type: 'string', required: true },
city: { type: 'string', required: true }
});
var memory = new DataSource('mem', {connector: Memory}, modelBuilder);
var Item = memory.createModel('Item', { name: 'string' }, {
mixins: { Address: true }
});
var properties = Item.definition.properties;
properties.street.should.eql({ type: String, required: true });
properties.city.should.eql({ type: String, required: true });
});
it('should apply mixins', function(done) {
var memory = new DataSource('mem', {connector: Memory}, modelBuilder);
var Item = memory.createModel('Item', { name: 'string' }, {
mixins: { TimeStamp: true, Demo: { ok: true } }
});
Item.mixin('Example', { foo: 'bar' });
Item.demoMixin.should.be.true;
var properties = Item.definition.properties;
properties.createdAt.should.eql({ type: Date });
properties.updatedAt.should.eql({ type: Date });
Item.create({ name: 'Item 1' }, function(err, inst) {
inst.createdAt.should.be.a.date;
inst.updatedAt.should.be.a.date;
inst.example().should.eql({ foo: 'bar' });
done();
});
});
});