var assert = require('assert') module.exports = function(idProperty, getEngine) { describe('#read()', function () { it('should return undefined if no object is found with given id', function (done) { getEngine(function (error, engine) { engine.read('999', function (error, entity) { assert.equal(undefined, entity) done() }) }) }) it('should emit a \'read\' event', function (done) { getEngine(function (error, engine) { engine.on('read', function (id) { assert.equal(id, '999') done() }) engine.read('999', function () { }) }) }) it('should return object if id is found', function (done) { var original = { a: 1 } getEngine(function (error, engine) { engine.create(original, function (error, entity) { engine.read(entity[idProperty], function (error, entity) { assert.equal(entity, entity) done() }) }) }) }) it('should emit a received event', function (done) { var original = { a: 1 } getEngine(function (error, engine) { engine.create(original, function (error, entity) { engine.on('received', function (data) { assert.deepEqual(data, entity) done() }) engine.read(entity[idProperty], function (error, entity) { assert.deepEqual(entity, entity) }) }) }) }) it('should return id of type String', function (done) { var original = { a: 1 } getEngine(function (error, engine) { engine.create(original, function (error, entity) { engine.read(entity[idProperty], function (error, entity) { entity[idProperty].should.be.type('string') done() }) }) }) }) it('should return a clone of the object', function (done) { var original = { a: 1 } getEngine(function (error, engine) { engine.create(original, function (error, entity) { engine.read(entity[idProperty], function (error, entity) { entity.newProperty = true original.should.not.have.property('newProperty') done() }) }) }) }) }) }