1630 lines
48 KiB
JavaScript
1630 lines
48 KiB
JavaScript
// Copyright IBM Corp. 2014,2016. All Rights Reserved.
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// Node module: loopback
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// This file is licensed under the MIT License.
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// License text available at https://opensource.org/licenses/MIT
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var assert = require('assert');
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var async = require('async');
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var loopback = require('../');
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var Change = loopback.Change;
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var defineModelTestsWithDataSource = require('./util/model-tests');
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var PersistedModel = loopback.PersistedModel;
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var expect = require('chai').expect;
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var debug = require('debug')('test');
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describe('Replication / Change APIs', function() {
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var dataSource, SourceModel, TargetModel;
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var useSinceFilter;
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var tid = 0; // per-test unique id used e.g. to build unique model names
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beforeEach(function() {
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tid++;
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useSinceFilter = false;
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var test = this;
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dataSource = this.dataSource = loopback.createDataSource({
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connector: loopback.Memory
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});
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SourceModel = this.SourceModel = PersistedModel.extend(
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'SourceModel-' + tid,
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{ id: { id: true, type: String, defaultFn: 'guid' } },
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{ trackChanges: true });
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SourceModel.attachTo(dataSource);
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TargetModel = this.TargetModel = PersistedModel.extend(
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'TargetModel-' + tid,
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{ id: { id: true, type: String, defaultFn: 'guid' } },
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{ trackChanges: true });
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// NOTE(bajtos) At the moment, all models share the same Checkpoint
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// model. This causes the in-process replication to work differently
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// than client-server replication.
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// As a workaround, we manually setup unique Checkpoint for TargetModel.
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var TargetChange = TargetModel.Change;
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TargetChange.Checkpoint = loopback.Checkpoint.extend('TargetCheckpoint');
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TargetChange.Checkpoint.attachTo(dataSource);
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TargetModel.attachTo(dataSource);
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test.startingCheckpoint = -1;
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this.createInitalData = function(cb) {
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SourceModel.create({name: 'foo'}, function(err, inst) {
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if (err) return cb(err);
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test.model = inst;
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SourceModel.replicate(TargetModel, cb);
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});
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};
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});
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describe('optimization check rectifyChange Vs rectifyAllChanges', function() {
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beforeEach(function initialData(done) {
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var data = [{name: 'John', surname: 'Doe'}, {name: 'Jane', surname: 'Roe'}];
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async.waterfall([
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function(callback) {
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SourceModel.create(data, callback);
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},
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function(data, callback) {
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SourceModel.replicate(TargetModel, callback);
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}], function(err, result) {
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done(err);
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});
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});
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it('should call rectifyAllChanges if no id is passed for rectifyOnDelete', function(done) {
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var calls = mockSourceModelRectify();
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SourceModel.destroyAll({name: 'John'}, function(err, data) {
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if (err) return done(err);
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expect(calls).to.eql(['rectifyAllChanges']);
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done();
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});
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});
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it('should call rectifyAllChanges if no id is passed for rectifyOnSave', function(done) {
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var calls = mockSourceModelRectify();
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var newData = {'name': 'Janie'};
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SourceModel.update({name: 'Jane'}, newData, function(err, data) {
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if (err) return done(err);
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expect(calls).to.eql(['rectifyAllChanges']);
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done();
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});
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});
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it('rectifyOnDelete for Delete should call rectifyChange instead of rectifyAllChanges', function(done) {
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var calls = mockTargetModelRectify();
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async.waterfall([
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function(callback) {
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SourceModel.destroyAll({name: 'John'}, callback);
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},
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function(data, callback) {
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SourceModel.replicate(TargetModel, callback);
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// replicate should call `rectifyOnSave` and then `rectifyChange` not `rectifyAllChanges` through `after save` operation
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}
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], function(err, results) {
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if (err) return done(err);
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expect(calls).to.eql(['rectifyChange']);
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done();
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});
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});
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it('rectifyOnSave for Update should call rectifyChange instead of rectifyAllChanges', function(done) {
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var calls = mockTargetModelRectify();
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var newData = {'name': 'Janie'};
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async.waterfall([
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function(callback) {
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SourceModel.update({name: 'Jane'}, newData, callback);
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},
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function(data, callback) {
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SourceModel.replicate(TargetModel, callback);
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// replicate should call `rectifyOnSave` and then `rectifyChange` not `rectifyAllChanges` through `after save` operation
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}
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], function(err, result) {
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if (err) return done(err);
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expect(calls).to.eql(['rectifyChange']);
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done();
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});
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});
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it('rectifyOnSave for Create should call rectifyChange instead of rectifyAllChanges', function(done) {
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var calls = mockTargetModelRectify();
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var newData = [{name: 'Janie', surname: 'Doe'}];
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async.waterfall([
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function(callback) {
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SourceModel.create(newData, callback);
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},
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function(data, callback) {
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SourceModel.replicate(TargetModel, callback);
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// replicate should call `rectifyOnSave` and then `rectifyChange` not `rectifyAllChanges` through `after save` operation
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}
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], function(err, result) {
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if (err) return done(err);
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expect(calls).to.eql(['rectifyChange']);
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done();
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});
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});
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function mockSourceModelRectify() {
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var calls = [];
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SourceModel.rectifyChange = function(id, cb) {
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calls.push('rectifyChange');
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process.nextTick(cb);
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};
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SourceModel.rectifyAllChanges = function(cb) {
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calls.push('rectifyAllChanges');
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process.nextTick(cb);
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};
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return calls;
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}
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function mockTargetModelRectify() {
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var calls = [];
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TargetModel.rectifyChange = function(id, cb) {
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calls.push('rectifyChange');
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process.nextTick(cb);
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};
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TargetModel.rectifyAllChanges = function(cb) {
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calls.push('rectifyAllChanges');
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process.nextTick(cb);
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};
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return calls;
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}
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});
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describe('Model.changes(since, filter, callback)', function() {
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it('Get changes since the given checkpoint', function(done) {
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var test = this;
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this.SourceModel.create({name: 'foo'}, function(err) {
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if (err) return done(err);
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setTimeout(function() {
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test.SourceModel.changes(test.startingCheckpoint, {}, function(err, changes) {
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assert.equal(changes.length, 1);
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done();
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});
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}, 1);
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});
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});
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it('excludes changes from older checkpoints', function(done) {
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var FUTURE_CHECKPOINT = 999;
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SourceModel.create({ name: 'foo' }, function(err) {
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if (err) return done(err);
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SourceModel.changes(FUTURE_CHECKPOINT, {}, function(err, changes) {
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if (err) return done(err);
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expect(changes).to.be.empty; //jshint ignore:line
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done();
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});
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});
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});
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});
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describe('Model.replicate(since, targetModel, options, callback)', function() {
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function assertTargetModelEqualsSourceModel(conflicts, sourceModel,
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targetModel, done) {
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var sourceData;
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var targetData;
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assert(conflicts.length === 0);
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async.parallel([
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function(cb) {
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sourceModel.find(function(err, result) {
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if (err) return cb(err);
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sourceData = result;
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cb();
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});
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},
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function(cb) {
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targetModel.find(function(err, result) {
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if (err) return cb(err);
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targetData = result;
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cb();
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});
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}
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], function(err) {
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if (err) return done(err);
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assert.deepEqual(sourceData, targetData);
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done();
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});
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}
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it('Replicate data using the target model', function(done) {
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var test = this;
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var options = {};
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this.SourceModel.create({name: 'foo'}, function(err) {
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if (err) return done(err);
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test.SourceModel.replicate(test.startingCheckpoint, test.TargetModel,
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options, function(err, conflicts) {
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if (err) return done(err);
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assertTargetModelEqualsSourceModel(conflicts, test.SourceModel,
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test.TargetModel, done);
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});
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});
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});
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it('Replicate data using the target model - promise variant', function(done) {
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var test = this;
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var options = {};
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this.SourceModel.create({name: 'foo'}, function(err) {
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if (err) return done(err);
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test.SourceModel.replicate(test.startingCheckpoint, test.TargetModel,
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options)
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.then(function(conflicts) {
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assertTargetModelEqualsSourceModel(conflicts, test.SourceModel,
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test.TargetModel, done);
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})
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.catch(function(err) {
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done(err);
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});
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});
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});
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it('applies "since" filter on source changes', function(done) {
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async.series([
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function createModelInSourceCp1(next) {
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SourceModel.create({ id: '1' }, next);
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},
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function checkpoint(next) {
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SourceModel.checkpoint(next);
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},
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function createModelInSourceCp2(next) {
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SourceModel.create({ id: '2' }, next);
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},
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function replicateLastChangeOnly(next) {
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SourceModel.currentCheckpoint(function(err, cp) {
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if (err) return done(err);
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SourceModel.replicate(cp, TargetModel, next);
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});
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},
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function verify(next) {
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TargetModel.find(function(err, list) {
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if (err) return done(err);
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// '1' should be skipped by replication
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expect(getIds(list)).to.eql(['2']);
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next();
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});
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}
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], done);
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});
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it('applies "since" filter on source changes - promise variant', function(done) {
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async.series([
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function createModelInSourceCp1(next) {
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SourceModel.create({ id: '1' }, next);
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},
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function checkpoint(next) {
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SourceModel.checkpoint(next);
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},
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function createModelInSourceCp2(next) {
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SourceModel.create({ id: '2' }, next);
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},
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function replicateLastChangeOnly(next) {
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SourceModel.currentCheckpoint(function(err, cp) {
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if (err) return done(err);
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SourceModel.replicate(cp, TargetModel, {})
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.then(function(next) {
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done();
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})
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.catch(err);
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});
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},
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function verify(next) {
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TargetModel.find(function(err, list) {
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if (err) return done(err);
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// '1' should be skipped by replication
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expect(getIds(list)).to.eql(['2']);
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next();
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});
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}
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], done);
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});
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it('applies "since" filter on target changes', function(done) {
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// Because the "since" filter is just an optimization,
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// there isn't really any observable behaviour we could
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// check to assert correct implementation.
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var diffSince = [];
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spyAndStoreSinceArg(TargetModel, 'diff', diffSince);
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SourceModel.replicate(10, TargetModel, function(err) {
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if (err) return done(err);
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expect(diffSince).to.eql([10]);
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done();
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});
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});
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it('applies "since" filter on target changes - promise variant', function(done) {
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// Because the "since" filter is just an optimization,
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// there isn't really any observable behaviour we could
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// check to assert correct implementation.
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var diffSince = [];
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spyAndStoreSinceArg(TargetModel, 'diff', diffSince);
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SourceModel.replicate(10, TargetModel, {})
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.then(function() {
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expect(diffSince).to.eql([10]);
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done();
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})
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.catch(function(err) {
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done(err);
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});
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});
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it('uses different "since" value for source and target', function(done) {
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var sourceSince = [];
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var targetSince = [];
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spyAndStoreSinceArg(SourceModel, 'changes', sourceSince);
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spyAndStoreSinceArg(TargetModel, 'diff', targetSince);
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var since = { source: 1, target: 2 };
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SourceModel.replicate(since, TargetModel, function(err) {
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if (err) return done(err);
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expect(sourceSince).to.eql([1]);
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expect(targetSince).to.eql([2]);
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done();
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});
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});
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it('uses different "since" value for source and target - promise variant', function(done) {
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var sourceSince = [];
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var targetSince = [];
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spyAndStoreSinceArg(SourceModel, 'changes', sourceSince);
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spyAndStoreSinceArg(TargetModel, 'diff', targetSince);
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var since = { source: 1, target: 2 };
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SourceModel.replicate(since, TargetModel, {})
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.then(function() {
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expect(sourceSince).to.eql([1]);
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expect(targetSince).to.eql([2]);
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done();
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})
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.catch(function(err) {
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done(err);
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});
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});
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it('picks up changes made during replication', function(done) {
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setupRaceConditionInReplication(function(cb) {
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// simulate the situation when another model is created
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// while a replication run is in progress
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SourceModel.create({ id: 'racer' }, cb);
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});
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var lastCp;
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async.series([
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function buildSomeDataToReplicate(next) {
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SourceModel.create({ id: 'init' }, next);
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},
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function getLastCp(next) {
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SourceModel.currentCheckpoint(function(err, cp) {
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if (err) return done(err);
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lastCp = cp;
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next();
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});
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},
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function replicate(next) {
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SourceModel.replicate(TargetModel, next);
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},
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function verifyAssumptions(next) {
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SourceModel.find(function(err, list) {
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expect(getIds(list), 'source ids')
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.to.eql(['init', 'racer']);
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TargetModel.find(function(err, list) {
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expect(getIds(list), 'target ids after first sync')
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.to.include.members(['init']);
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next();
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});
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});
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},
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function replicateAgain(next) {
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SourceModel.replicate(lastCp + 1, TargetModel, next);
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},
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function verify(next) {
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TargetModel.find(function(err, list) {
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expect(getIds(list), 'target ids').to.eql(['init', 'racer']);
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next();
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});
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}
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], done);
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});
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it('returns new current checkpoints to callback', function(done) {
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var sourceCp, targetCp;
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async.series([
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bumpSourceCheckpoint,
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bumpTargetCheckpoint,
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bumpTargetCheckpoint,
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function replicate(cb) {
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expect(sourceCp).to.not.equal(targetCp);
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SourceModel.replicate(
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TargetModel,
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function(err, conflicts, newCheckpoints) {
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if (err) return cb(err);
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expect(conflicts, 'conflicts').to.eql([]);
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expect(newCheckpoints, 'currentCheckpoints').to.eql({
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source: sourceCp + 1,
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target: targetCp + 1
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});
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cb();
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});
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}
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], done);
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function bumpSourceCheckpoint(cb) {
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SourceModel.checkpoint(function(err, inst) {
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if (err) return cb(err);
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sourceCp = inst.seq;
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cb();
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});
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}
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function bumpTargetCheckpoint(cb) {
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TargetModel.checkpoint(function(err, inst) {
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if (err) return cb(err);
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targetCp = inst.seq;
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cb();
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});
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}
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});
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it('leaves current target checkpoint empty', function(done) {
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async.series([
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function createTestData(next) {
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SourceModel.create({}, next);
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},
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replicateExpectingSuccess(),
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function verify(next) {
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TargetModel.currentCheckpoint(function(err, cp) {
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if (err) return next(err);
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TargetModel.getChangeModel().find(
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{ where: { checkpoint: { gte: cp } } },
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function(err, changes) {
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if (err) return done(err);
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expect(changes).to.have.length(0);
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done();
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});
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});
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}
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], done);
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});
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describe('with 3rd-party changes', function() {
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it('detects UPDATE made during UPDATE', function(done) {
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async.series([
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createModel(SourceModel, { id: '1' }),
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replicateExpectingSuccess(),
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function updateModel(next) {
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SourceModel.updateAll({ id: '1' }, { name: 'source' }, next);
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},
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function replicateWith3rdPartyModifyingData(next) {
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setupRaceConditionInReplication(function(cb) {
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var connector = TargetModel.dataSource.connector;
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if (connector.updateAttributes.length <= 4) {
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connector.updateAttributes(
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TargetModel.modelName,
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'1',
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{name: '3rd-party'},
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cb);
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} else {
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// 2.x connectors require `options`
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connector.updateAttributes(
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TargetModel.modelName,
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'1',
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{name: '3rd-party'},
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{}, // options
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cb);
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}
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});
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SourceModel.replicate(
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TargetModel,
|
|
function(err, conflicts, cps, updates) {
|
|
if (err) return next(err);
|
|
|
|
var conflictedIds = getPropValue(conflicts || [], 'modelId');
|
|
expect(conflictedIds).to.eql(['1']);
|
|
|
|
// resolve the conflict using ours
|
|
conflicts[0].resolve(next);
|
|
});
|
|
},
|
|
|
|
replicateExpectingSuccess(),
|
|
verifyInstanceWasReplicated(SourceModel, TargetModel, '1')
|
|
], done);
|
|
});
|
|
|
|
it('detects CREATE made during CREATE', function(done) {
|
|
async.series([
|
|
// FIXME(bajtos) Remove the 'name' property once the implementation
|
|
// of UPDATE is fixed to correctly remove properties
|
|
createModel(SourceModel, { id: '1', name: 'source' }),
|
|
function replicateWith3rdPartyModifyingData(next) {
|
|
var connector = TargetModel.dataSource.connector;
|
|
setupRaceConditionInReplication(function(cb) {
|
|
if (connector.create.length <= 3) {
|
|
connector.create(
|
|
TargetModel.modelName,
|
|
{id: '1', name: '3rd-party'},
|
|
cb);
|
|
} else {
|
|
// 2.x connectors require `options`
|
|
connector.create(
|
|
TargetModel.modelName,
|
|
{id: '1', name: '3rd-party'},
|
|
{}, // options
|
|
cb);
|
|
}
|
|
});
|
|
|
|
SourceModel.replicate(
|
|
TargetModel,
|
|
function(err, conflicts, cps, updates) {
|
|
if (err) return next(err);
|
|
|
|
var conflictedIds = getPropValue(conflicts || [], 'modelId');
|
|
expect(conflictedIds).to.eql(['1']);
|
|
|
|
// resolve the conflict using ours
|
|
conflicts[0].resolve(next);
|
|
});
|
|
},
|
|
|
|
replicateExpectingSuccess(),
|
|
verifyInstanceWasReplicated(SourceModel, TargetModel, '1')
|
|
], done);
|
|
});
|
|
|
|
it('detects UPDATE made during DELETE', function(done) {
|
|
async.series([
|
|
createModel(SourceModel, { id: '1' }),
|
|
replicateExpectingSuccess(),
|
|
function deleteModel(next) {
|
|
SourceModel.deleteById('1', next);
|
|
},
|
|
function replicateWith3rdPartyModifyingData(next) {
|
|
setupRaceConditionInReplication(function(cb) {
|
|
var connector = TargetModel.dataSource.connector;
|
|
if (connector.updateAttributes.length <= 4) {
|
|
connector.updateAttributes(
|
|
TargetModel.modelName,
|
|
'1',
|
|
{name: '3rd-party'},
|
|
cb);
|
|
} else {
|
|
// 2.x connectors require `options`
|
|
connector.updateAttributes(
|
|
TargetModel.modelName,
|
|
'1',
|
|
{name: '3rd-party'},
|
|
{}, // options
|
|
cb);
|
|
}
|
|
});
|
|
|
|
SourceModel.replicate(
|
|
TargetModel,
|
|
function(err, conflicts, cps, updates) {
|
|
if (err) return next(err);
|
|
|
|
var conflictedIds = getPropValue(conflicts || [], 'modelId');
|
|
expect(conflictedIds).to.eql(['1']);
|
|
|
|
// resolve the conflict using ours
|
|
conflicts[0].resolve(next);
|
|
});
|
|
},
|
|
|
|
replicateExpectingSuccess(),
|
|
verifyInstanceWasReplicated(SourceModel, TargetModel, '1')
|
|
], done);
|
|
});
|
|
|
|
it('handles DELETE made during DELETE', function(done) {
|
|
async.series([
|
|
createModel(SourceModel, { id: '1' }),
|
|
replicateExpectingSuccess(),
|
|
function deleteModel(next) {
|
|
SourceModel.deleteById('1', next);
|
|
},
|
|
function setup3rdPartyModifyingData(next) {
|
|
var connector = TargetModel.dataSource.connector;
|
|
setupRaceConditionInReplication(function(cb) {
|
|
if (connector.destroy.length <= 3) {
|
|
connector.destroy(
|
|
TargetModel.modelName,
|
|
'1',
|
|
cb);
|
|
} else {
|
|
// 2.x connectors require `options`
|
|
connector.destroy(
|
|
TargetModel.modelName,
|
|
'1',
|
|
{}, // options
|
|
cb);
|
|
}
|
|
});
|
|
|
|
next();
|
|
},
|
|
replicateExpectingSuccess(),
|
|
verifyInstanceWasReplicated(SourceModel, TargetModel, '1')
|
|
], done);
|
|
});
|
|
});
|
|
});
|
|
|
|
describe('conflict detection - both updated', function() {
|
|
beforeEach(function(done) {
|
|
var SourceModel = this.SourceModel;
|
|
var TargetModel = this.TargetModel;
|
|
var test = this;
|
|
|
|
test.createInitalData(createConflict);
|
|
|
|
function createConflict(err, conflicts) {
|
|
async.parallel([
|
|
function(cb) {
|
|
SourceModel.findOne(function(err, inst) {
|
|
if (err) return cb(err);
|
|
inst.name = 'source update';
|
|
inst.save(cb);
|
|
});
|
|
},
|
|
function(cb) {
|
|
TargetModel.findOne(function(err, inst) {
|
|
if (err) return cb(err);
|
|
inst.name = 'target update';
|
|
inst.save(cb);
|
|
});
|
|
}
|
|
], function(err) {
|
|
if (err) return done(err);
|
|
|
|
SourceModel.replicate(TargetModel, function(err, conflicts) {
|
|
if (err) return done(err);
|
|
|
|
test.conflicts = conflicts;
|
|
test.conflict = conflicts[0];
|
|
|
|
done();
|
|
});
|
|
});
|
|
}
|
|
});
|
|
it('should detect a single conflict', function() {
|
|
assert.equal(this.conflicts.length, 1);
|
|
assert(this.conflict);
|
|
});
|
|
it('type should be UPDATE', function(done) {
|
|
this.conflict.type(function(err, type) {
|
|
assert.equal(type, Change.UPDATE);
|
|
|
|
done();
|
|
});
|
|
});
|
|
it('conflict.changes()', function(done) {
|
|
var test = this;
|
|
this.conflict.changes(function(err, sourceChange, targetChange) {
|
|
assert.equal(typeof sourceChange.id, 'string');
|
|
assert.equal(typeof targetChange.id, 'string');
|
|
assert.equal(test.model.getId(), sourceChange.getModelId());
|
|
assert.equal(sourceChange.type(), Change.UPDATE);
|
|
assert.equal(targetChange.type(), Change.UPDATE);
|
|
|
|
done();
|
|
});
|
|
});
|
|
it('conflict.models()', function(done) {
|
|
var test = this;
|
|
this.conflict.models(function(err, source, target) {
|
|
assert.deepEqual(source.toJSON(), {
|
|
id: test.model.id,
|
|
name: 'source update'
|
|
});
|
|
assert.deepEqual(target.toJSON(), {
|
|
id: test.model.id,
|
|
name: 'target update'
|
|
});
|
|
|
|
done();
|
|
});
|
|
});
|
|
});
|
|
|
|
describe('conflict detection - source deleted', function() {
|
|
beforeEach(function(done) {
|
|
var SourceModel = this.SourceModel;
|
|
var TargetModel = this.TargetModel;
|
|
var test = this;
|
|
|
|
test.createInitalData(createConflict);
|
|
|
|
function createConflict() {
|
|
async.parallel([
|
|
function(cb) {
|
|
SourceModel.findOne(function(err, inst) {
|
|
if (err) return cb(err);
|
|
|
|
test.model = inst;
|
|
inst.remove(cb);
|
|
});
|
|
},
|
|
function(cb) {
|
|
TargetModel.findOne(function(err, inst) {
|
|
if (err) return cb(err);
|
|
|
|
inst.name = 'target update';
|
|
inst.save(cb);
|
|
});
|
|
}
|
|
], function(err) {
|
|
if (err) return done(err);
|
|
|
|
SourceModel.replicate(TargetModel, function(err, conflicts) {
|
|
if (err) return done(err);
|
|
|
|
test.conflicts = conflicts;
|
|
test.conflict = conflicts[0];
|
|
|
|
done();
|
|
});
|
|
});
|
|
}
|
|
});
|
|
it('should detect a single conflict', function() {
|
|
assert.equal(this.conflicts.length, 1);
|
|
assert(this.conflict);
|
|
});
|
|
it('type should be DELETE', function(done) {
|
|
this.conflict.type(function(err, type) {
|
|
assert.equal(type, Change.DELETE);
|
|
|
|
done();
|
|
});
|
|
});
|
|
it('conflict.changes()', function(done) {
|
|
var test = this;
|
|
this.conflict.changes(function(err, sourceChange, targetChange) {
|
|
assert.equal(typeof sourceChange.id, 'string');
|
|
assert.equal(typeof targetChange.id, 'string');
|
|
assert.equal(test.model.getId(), sourceChange.getModelId());
|
|
assert.equal(sourceChange.type(), Change.DELETE);
|
|
assert.equal(targetChange.type(), Change.UPDATE);
|
|
|
|
done();
|
|
});
|
|
});
|
|
it('conflict.models()', function(done) {
|
|
var test = this;
|
|
this.conflict.models(function(err, source, target) {
|
|
assert.equal(source, null);
|
|
assert.deepEqual(target.toJSON(), {
|
|
id: test.model.id,
|
|
name: 'target update'
|
|
});
|
|
|
|
done();
|
|
});
|
|
});
|
|
});
|
|
|
|
describe('conflict detection - target deleted', function() {
|
|
beforeEach(function(done) {
|
|
var SourceModel = this.SourceModel;
|
|
var TargetModel = this.TargetModel;
|
|
var test = this;
|
|
|
|
test.createInitalData(createConflict);
|
|
|
|
function createConflict() {
|
|
async.parallel([
|
|
function(cb) {
|
|
SourceModel.findOne(function(err, inst) {
|
|
if (err) return cb(err);
|
|
test.model = inst;
|
|
inst.name = 'source update';
|
|
inst.save(cb);
|
|
});
|
|
},
|
|
function(cb) {
|
|
TargetModel.findOne(function(err, inst) {
|
|
if (err) return cb(err);
|
|
|
|
inst.remove(cb);
|
|
});
|
|
}
|
|
], function(err) {
|
|
if (err) return done(err);
|
|
|
|
SourceModel.replicate(TargetModel, function(err, conflicts) {
|
|
if (err) return done(err);
|
|
|
|
test.conflicts = conflicts;
|
|
test.conflict = conflicts[0];
|
|
|
|
done();
|
|
});
|
|
});
|
|
}
|
|
});
|
|
it('should detect a single conflict', function() {
|
|
assert.equal(this.conflicts.length, 1);
|
|
assert(this.conflict);
|
|
});
|
|
it('type should be DELETE', function(done) {
|
|
this.conflict.type(function(err, type) {
|
|
assert.equal(type, Change.DELETE);
|
|
|
|
done();
|
|
});
|
|
});
|
|
it('conflict.changes()', function(done) {
|
|
var test = this;
|
|
this.conflict.changes(function(err, sourceChange, targetChange) {
|
|
assert.equal(typeof sourceChange.id, 'string');
|
|
assert.equal(typeof targetChange.id, 'string');
|
|
assert.equal(test.model.getId(), sourceChange.getModelId());
|
|
assert.equal(sourceChange.type(), Change.UPDATE);
|
|
assert.equal(targetChange.type(), Change.DELETE);
|
|
|
|
done();
|
|
});
|
|
});
|
|
it('conflict.models()', function(done) {
|
|
var test = this;
|
|
this.conflict.models(function(err, source, target) {
|
|
assert.equal(target, null);
|
|
assert.deepEqual(source.toJSON(), {
|
|
id: test.model.id,
|
|
name: 'source update'
|
|
});
|
|
|
|
done();
|
|
});
|
|
});
|
|
});
|
|
|
|
describe('conflict detection - both deleted', function() {
|
|
beforeEach(function(done) {
|
|
var SourceModel = this.SourceModel;
|
|
var TargetModel = this.TargetModel;
|
|
var test = this;
|
|
|
|
test.createInitalData(createConflict);
|
|
|
|
function createConflict() {
|
|
async.parallel([
|
|
function(cb) {
|
|
SourceModel.findOne(function(err, inst) {
|
|
if (err) return cb(err);
|
|
|
|
test.model = inst;
|
|
inst.remove(cb);
|
|
});
|
|
},
|
|
function(cb) {
|
|
TargetModel.findOne(function(err, inst) {
|
|
if (err) return cb(err);
|
|
|
|
inst.remove(cb);
|
|
});
|
|
}
|
|
], function(err) {
|
|
if (err) return done(err);
|
|
|
|
SourceModel.replicate(TargetModel, function(err, conflicts) {
|
|
if (err) return done(err);
|
|
|
|
test.conflicts = conflicts;
|
|
test.conflict = conflicts[0];
|
|
|
|
done();
|
|
});
|
|
});
|
|
}
|
|
});
|
|
it('should not detect a conflict', function() {
|
|
assert.equal(this.conflicts.length, 0);
|
|
assert(!this.conflict);
|
|
});
|
|
});
|
|
|
|
describe('change detection', function() {
|
|
it('detects "create"', function(done) {
|
|
SourceModel.create({}, function(err, inst) {
|
|
if (err) return done(err);
|
|
|
|
assertChangeRecordedForId(inst.id, done);
|
|
});
|
|
});
|
|
|
|
it('detects "updateOrCreate"', function(done) {
|
|
givenReplicatedInstance(function(err, created) {
|
|
if (err) return done(err);
|
|
|
|
var data = created.toObject();
|
|
created.name = 'updated';
|
|
SourceModel.updateOrCreate(created, function(err, inst) {
|
|
if (err) return done(err);
|
|
|
|
assertChangeRecordedForId(inst.id, done);
|
|
});
|
|
});
|
|
});
|
|
|
|
it('detects "findOrCreate"', function(done) {
|
|
// make sure we bypass find+create and call the connector directly
|
|
SourceModel.dataSource.connector.findOrCreate =
|
|
function(model, query, data, callback) {
|
|
if (this.all.length <= 3) {
|
|
this.all(model, query, function(err, list) {
|
|
if (err || (list && list[0]))
|
|
return callback(err, list && list[0], false);
|
|
|
|
this.create(model, data, function(err) {
|
|
callback(err, data, true);
|
|
});
|
|
}.bind(this));
|
|
} else {
|
|
// 2.x connectors requires `options`
|
|
this.all(model, query, {}, function(err, list) {
|
|
if (err || (list && list[0]))
|
|
return callback(err, list && list[0], false);
|
|
|
|
this.create(model, data, {}, function(err) {
|
|
callback(err, data, true);
|
|
});
|
|
}.bind(this));
|
|
}
|
|
};
|
|
|
|
SourceModel.findOrCreate(
|
|
{ where: { name: 'does-not-exist' } },
|
|
{ name: 'created' },
|
|
function(err, inst) {
|
|
if (err) return done(err);
|
|
|
|
assertChangeRecordedForId(inst.id, done);
|
|
});
|
|
});
|
|
|
|
it('detects "deleteById"', function(done) {
|
|
givenReplicatedInstance(function(err, inst) {
|
|
if (err) return done(err);
|
|
|
|
SourceModel.deleteById(inst.id, function(err) {
|
|
assertChangeRecordedForId(inst.id, done);
|
|
});
|
|
});
|
|
});
|
|
|
|
it('detects "deleteAll"', function(done) {
|
|
givenReplicatedInstance(function(err, inst) {
|
|
if (err) return done(err);
|
|
|
|
SourceModel.deleteAll({ name: inst.name }, function(err) {
|
|
if (err) return done(err);
|
|
|
|
assertChangeRecordedForId(inst.id, done);
|
|
});
|
|
});
|
|
});
|
|
|
|
it('detects "updateAll"', function(done) {
|
|
givenReplicatedInstance(function(err, inst) {
|
|
if (err) return done(err);
|
|
|
|
SourceModel.updateAll(
|
|
{ name: inst.name },
|
|
{ name: 'updated' },
|
|
function(err) {
|
|
if (err) return done(err);
|
|
|
|
assertChangeRecordedForId(inst.id, done);
|
|
});
|
|
});
|
|
});
|
|
|
|
it('detects "prototype.save"', function(done) {
|
|
givenReplicatedInstance(function(err, inst) {
|
|
if (err) return done(err);
|
|
|
|
inst.name = 'updated';
|
|
inst.save(function(err) {
|
|
if (err) return done(err);
|
|
|
|
assertChangeRecordedForId(inst.id, done);
|
|
});
|
|
});
|
|
});
|
|
|
|
it('detects "prototype.updateAttributes"', function(done) {
|
|
givenReplicatedInstance(function(err, inst) {
|
|
if (err) return done(err);
|
|
|
|
inst.updateAttributes({ name: 'updated' }, function(err) {
|
|
if (err) return done(err);
|
|
|
|
assertChangeRecordedForId(inst.id, done);
|
|
});
|
|
});
|
|
});
|
|
|
|
it('detects "prototype.delete"', function(done) {
|
|
givenReplicatedInstance(function(err, inst) {
|
|
if (err) return done(err);
|
|
|
|
inst.delete(function(err) {
|
|
assertChangeRecordedForId(inst.id, done);
|
|
});
|
|
});
|
|
});
|
|
|
|
function givenReplicatedInstance(cb) {
|
|
SourceModel.create({ name: 'a-name' }, function(err, inst) {
|
|
if (err) return cb(err);
|
|
|
|
SourceModel.checkpoint(function(err) {
|
|
if (err) return cb(err);
|
|
|
|
cb(null, inst);
|
|
});
|
|
});
|
|
}
|
|
|
|
function assertChangeRecordedForId(id, cb) {
|
|
SourceModel.getChangeModel().getCheckpointModel()
|
|
.current(function(err, cp) {
|
|
if (err) return cb(err);
|
|
|
|
SourceModel.changes(cp - 1, {}, function(err, pendingChanges) {
|
|
if (err) return cb(err);
|
|
|
|
expect(pendingChanges, 'list of changes').to.have.length(1);
|
|
var change = pendingChanges[0].toObject();
|
|
expect(change).to.have.property('checkpoint', cp); // sanity check
|
|
expect(change).to.have.property('modelName', SourceModel.modelName);
|
|
// NOTE(bajtos) Change.modelId is always String
|
|
// regardless of the type of the changed model's id property
|
|
expect(change).to.have.property('modelId', '' + id);
|
|
|
|
cb();
|
|
});
|
|
});
|
|
}
|
|
});
|
|
|
|
describe('complex setup', function() {
|
|
var sourceInstance, sourceInstanceId, AnotherModel;
|
|
|
|
beforeEach(function createReplicatedInstance(done) {
|
|
async.series([
|
|
function createInstance(next) {
|
|
SourceModel.create({ id: 'test-instance' }, function(err, result) {
|
|
sourceInstance = result;
|
|
sourceInstanceId = result.id;
|
|
|
|
next(err);
|
|
});
|
|
},
|
|
replicateExpectingSuccess(),
|
|
verifySourceWasReplicated()
|
|
], done);
|
|
});
|
|
|
|
beforeEach(function setupThirdModel() {
|
|
AnotherModel = this.AnotherModel = PersistedModel.extend(
|
|
'AnotherModel-' + tid,
|
|
{ id: { id: true, type: String, defaultFn: 'guid' } },
|
|
{ trackChanges: true });
|
|
|
|
// NOTE(bajtos) At the moment, all models share the same Checkpoint
|
|
// model. This causes the in-process replication to work differently
|
|
// than client-server replication.
|
|
// As a workaround, we manually setup unique Checkpoint for AnotherModel.
|
|
var AnotherChange = AnotherModel.Change;
|
|
AnotherChange.Checkpoint = loopback.Checkpoint.extend('AnotherCheckpoint');
|
|
AnotherChange.Checkpoint.attachTo(dataSource);
|
|
|
|
AnotherModel.attachTo(dataSource);
|
|
});
|
|
|
|
it('correctly replicates without checkpoint filter', function(done) {
|
|
async.series([
|
|
updateSourceInstanceNameTo('updated'),
|
|
replicateExpectingSuccess(),
|
|
verifySourceWasReplicated(),
|
|
|
|
function deleteInstance(next) {
|
|
sourceInstance.remove(next);
|
|
},
|
|
replicateExpectingSuccess(),
|
|
function verifyTargetModelWasDeleted(next) {
|
|
TargetModel.find(function(err, list) {
|
|
if (err) return next(err);
|
|
|
|
expect(getIds(list)).to.not.contain(sourceInstance.id);
|
|
|
|
next();
|
|
});
|
|
}
|
|
], done);
|
|
});
|
|
|
|
it('replicates multiple updates within the same CP', function(done) {
|
|
async.series([
|
|
replicateExpectingSuccess(),
|
|
verifySourceWasReplicated(),
|
|
|
|
updateSourceInstanceNameTo('updated'),
|
|
updateSourceInstanceNameTo('again'),
|
|
replicateExpectingSuccess(),
|
|
verifySourceWasReplicated()
|
|
], done);
|
|
});
|
|
|
|
describe('clientA-server-clientB', function() {
|
|
var ClientA, Server, ClientB;
|
|
|
|
beforeEach(function() {
|
|
ClientA = SourceModel;
|
|
Server = TargetModel;
|
|
ClientB = AnotherModel;
|
|
|
|
// NOTE(bajtos) The tests should ideally pass without the since
|
|
// filter too. Unfortunately that's not possible with the current
|
|
// implementation that remembers only the last two changes made.
|
|
useSinceFilter = true;
|
|
});
|
|
|
|
it('replicates new models', function(done) {
|
|
async.series([
|
|
// Note that ClientA->Server was already replicated during setup
|
|
replicateExpectingSuccess(Server, ClientB),
|
|
verifySourceWasReplicated(ClientB)
|
|
], done);
|
|
});
|
|
|
|
it('propagates updates with no false conflicts', function(done) {
|
|
async.series([
|
|
updateSourceInstanceNameTo('v2'),
|
|
replicateExpectingSuccess(ClientA, Server),
|
|
|
|
replicateExpectingSuccess(Server, ClientB),
|
|
|
|
updateSourceInstanceNameTo('v3'),
|
|
replicateExpectingSuccess(ClientA, Server),
|
|
updateSourceInstanceNameTo('v4'),
|
|
replicateExpectingSuccess(ClientA, Server),
|
|
|
|
replicateExpectingSuccess(Server, ClientB),
|
|
verifySourceWasReplicated(ClientB)
|
|
], done);
|
|
});
|
|
|
|
it('propagates deletes with no false conflicts', function(done) {
|
|
async.series([
|
|
deleteSourceInstance(),
|
|
replicateExpectingSuccess(ClientA, Server),
|
|
replicateExpectingSuccess(Server, ClientB),
|
|
verifySourceWasReplicated(ClientB)
|
|
], done);
|
|
});
|
|
|
|
describe('bidirectional sync', function() {
|
|
beforeEach(function finishInitialSync(next) {
|
|
// The fixture setup creates a new model instance and replicates
|
|
// it from ClientA to Server. Since we are performing bidirectional
|
|
// synchronization in this suite, we must complete the first sync,
|
|
// otherwise some of the tests may fail.
|
|
replicateExpectingSuccess(Server, ClientA)(next);
|
|
});
|
|
|
|
it('propagates CREATE', function(done) {
|
|
async.series([
|
|
sync(ClientA, Server),
|
|
sync(ClientB, Server)
|
|
], done);
|
|
});
|
|
|
|
it('propagates CREATE+UPDATE', function(done) {
|
|
async.series([
|
|
// NOTE: ClientB has not fetched the new model instance yet
|
|
updateSourceInstanceNameTo('v2'),
|
|
sync(ClientA, Server),
|
|
|
|
// ClientB fetches the created & updated instance from the server
|
|
sync(ClientB, Server),
|
|
], done);
|
|
});
|
|
|
|
it('propagates DELETE', function(done) {
|
|
async.series([
|
|
// NOTE: ClientB has not fetched the new model instance yet
|
|
updateSourceInstanceNameTo('v2'),
|
|
sync(ClientA, Server),
|
|
|
|
// ClientB fetches the created & updated instance from the server
|
|
sync(ClientB, Server),
|
|
], done);
|
|
|
|
});
|
|
|
|
it('does not report false conflicts', function(done) {
|
|
async.series([
|
|
// client A makes some work
|
|
updateSourceInstanceNameTo('v2'),
|
|
sync(ClientA, Server),
|
|
|
|
// ClientB fetches the change from the server
|
|
sync(ClientB, Server),
|
|
verifySourceWasReplicated(ClientB),
|
|
|
|
// client B makes some work
|
|
updateClientB('v5'),
|
|
sync(Server, ClientB),
|
|
updateClientB('v6'),
|
|
sync(ClientB, Server),
|
|
|
|
// client A fetches the changes
|
|
sync(ClientA, Server)
|
|
], done);
|
|
});
|
|
|
|
it('handles UPDATE conflict resolved using "ours"', function(done) {
|
|
testUpdateConflictIsResolved(
|
|
function resolveUsingOurs(conflict, cb) {
|
|
conflict.resolveUsingSource(cb);
|
|
},
|
|
done);
|
|
});
|
|
|
|
it('handles UPDATE conflict resolved using "theirs"', function(done) {
|
|
testUpdateConflictIsResolved(
|
|
function resolveUsingTheirs(conflict, cb) {
|
|
// We sync ClientA->Server first
|
|
expect(conflict.SourceModel.modelName)
|
|
.to.equal(ClientB.modelName);
|
|
conflict.resolveUsingTarget(cb);
|
|
},
|
|
done);
|
|
});
|
|
|
|
it('handles UPDATE conflict resolved manually', function(done) {
|
|
testUpdateConflictIsResolved(
|
|
function resolveManually(conflict, cb) {
|
|
conflict.resolveManually({ name: 'manual' }, cb);
|
|
},
|
|
done);
|
|
});
|
|
|
|
it('handles DELETE conflict resolved using "ours"', function(done) {
|
|
testDeleteConflictIsResolved(
|
|
function resolveUsingOurs(conflict, cb) {
|
|
conflict.resolveUsingSource(cb);
|
|
},
|
|
done);
|
|
});
|
|
|
|
it('handles DELETE conflict resolved using "theirs"', function(done) {
|
|
testDeleteConflictIsResolved(
|
|
function resolveUsingTheirs(conflict, cb) {
|
|
// We sync ClientA->Server first
|
|
expect(conflict.SourceModel.modelName)
|
|
.to.equal(ClientB.modelName);
|
|
conflict.resolveUsingTarget(cb);
|
|
},
|
|
done);
|
|
});
|
|
|
|
it('handles DELETE conflict resolved as manual delete', function(done) {
|
|
testDeleteConflictIsResolved(
|
|
function resolveManually(conflict, cb) {
|
|
conflict.resolveManually(null, cb);
|
|
},
|
|
done);
|
|
});
|
|
|
|
it('handles DELETE conflict resolved manually', function(done) {
|
|
testDeleteConflictIsResolved(
|
|
function resolveManually(conflict, cb) {
|
|
conflict.resolveManually({ name: 'manual' }, cb);
|
|
},
|
|
done);
|
|
});
|
|
});
|
|
|
|
function testUpdateConflictIsResolved(resolver, cb) {
|
|
async.series([
|
|
// sync the new model to ClientB
|
|
sync(ClientB, Server),
|
|
verifyInstanceWasReplicated(ClientA, ClientB, sourceInstanceId),
|
|
|
|
// ClientA makes a change
|
|
updateSourceInstanceNameTo('a'),
|
|
sync(ClientA, Server),
|
|
|
|
// ClientB changes the same instance
|
|
updateClientB('b'),
|
|
|
|
function syncAndResolveConflict(next) {
|
|
replicate(ClientB, Server, function(err, conflicts, cps) {
|
|
if (err) return next(err);
|
|
|
|
expect(conflicts).to.have.length(1);
|
|
expect(conflicts[0].SourceModel.modelName)
|
|
.to.equal(ClientB.modelName);
|
|
|
|
debug('Resolving the conflict %j', conflicts[0]);
|
|
resolver(conflicts[0], next);
|
|
});
|
|
},
|
|
|
|
// repeat the last sync, it should pass now
|
|
sync(ClientB, Server),
|
|
// and sync back to ClientA too
|
|
sync(ClientA, Server),
|
|
|
|
verifyInstanceWasReplicated(ClientB, ClientA, sourceInstanceId)
|
|
], cb);
|
|
}
|
|
|
|
function testDeleteConflictIsResolved(resolver, cb) {
|
|
async.series([
|
|
// sync the new model to ClientB
|
|
sync(ClientB, Server),
|
|
verifyInstanceWasReplicated(ClientA, ClientB, sourceInstanceId),
|
|
|
|
// ClientA makes a change
|
|
function deleteInstanceOnClientA(next) {
|
|
ClientA.deleteById(sourceInstanceId, next);
|
|
},
|
|
|
|
sync(ClientA, Server),
|
|
|
|
// ClientB changes the same instance
|
|
updateClientB('b'),
|
|
|
|
function syncAndResolveConflict(next) {
|
|
replicate(ClientB, Server, function(err, conflicts, cps) {
|
|
if (err) return next(err);
|
|
|
|
expect(conflicts).to.have.length(1);
|
|
expect(conflicts[0].SourceModel.modelName)
|
|
.to.equal(ClientB.modelName);
|
|
|
|
debug('Resolving the conflict %j', conflicts[0]);
|
|
resolver(conflicts[0], next);
|
|
});
|
|
},
|
|
|
|
// repeat the last sync, it should pass now
|
|
sync(ClientB, Server),
|
|
// and sync back to ClientA too
|
|
sync(ClientA, Server),
|
|
|
|
verifyInstanceWasReplicated(ClientB, ClientA, sourceInstanceId)
|
|
], cb);
|
|
}
|
|
|
|
function updateClientB(name) {
|
|
return function updateInstanceB(next) {
|
|
ClientB.findById(sourceInstanceId, function(err, instance) {
|
|
if (err) return next(err);
|
|
|
|
instance.name = name;
|
|
instance.save(next);
|
|
});
|
|
};
|
|
}
|
|
|
|
function sync(client, server) {
|
|
return function syncBothWays(next) {
|
|
async.series([
|
|
// NOTE(bajtos) It's important to replicate from the client to the
|
|
// server first, so that we can resolve any conflicts at the client
|
|
replicateExpectingSuccess(client, server),
|
|
replicateExpectingSuccess(server, client)
|
|
], next);
|
|
};
|
|
}
|
|
|
|
});
|
|
|
|
function updateSourceInstanceNameTo(value) {
|
|
return function updateInstance(next) {
|
|
debug('update source instance name to %j', value);
|
|
sourceInstance.name = value;
|
|
sourceInstance.save(next);
|
|
};
|
|
}
|
|
|
|
function deleteSourceInstance(value) {
|
|
return function deleteInstance(next) {
|
|
debug('delete source instance', value);
|
|
sourceInstance.remove(function(err) {
|
|
sourceInstance = null;
|
|
|
|
next(err);
|
|
});
|
|
};
|
|
}
|
|
|
|
function verifySourceWasReplicated(target) {
|
|
if (!target) target = TargetModel;
|
|
|
|
return function verify(next) {
|
|
target.findById(sourceInstanceId, function(err, targetInstance) {
|
|
if (err) return next(err);
|
|
|
|
expect(targetInstance && targetInstance.toObject())
|
|
.to.eql(sourceInstance && sourceInstance.toObject());
|
|
|
|
next();
|
|
});
|
|
};
|
|
}
|
|
});
|
|
|
|
var _since = {};
|
|
function replicate(source, target, since, next) {
|
|
if (typeof since === 'function') {
|
|
next = since;
|
|
since = undefined;
|
|
}
|
|
|
|
var sinceIx = source.modelName + ':to:' + target.modelName;
|
|
if (since === undefined) {
|
|
since = useSinceFilter ?
|
|
_since[sinceIx] || -1 :
|
|
-1;
|
|
}
|
|
|
|
debug('replicate from %s to %s since %j',
|
|
source.modelName, target.modelName, since);
|
|
|
|
source.replicate(since, target, function(err, conflicts, cps) {
|
|
if (err) return next(err);
|
|
|
|
if (conflicts.length === 0) {
|
|
_since[sinceIx] = cps;
|
|
}
|
|
|
|
next(err, conflicts, cps);
|
|
});
|
|
}
|
|
|
|
function createModel(Model, data) {
|
|
return function create(next) {
|
|
Model.create(data, next);
|
|
};
|
|
}
|
|
|
|
function replicateExpectingSuccess(source, target, since) {
|
|
if (!source) source = SourceModel;
|
|
if (!target) target = TargetModel;
|
|
|
|
return function doReplicate(next) {
|
|
replicate(source, target, since, function(err, conflicts, cps) {
|
|
if (err) return next(err);
|
|
|
|
if (conflicts.length) {
|
|
return next(new Error('Unexpected conflicts\n' +
|
|
conflicts.map(JSON.stringify).join('\n')));
|
|
}
|
|
|
|
next();
|
|
});
|
|
};
|
|
}
|
|
|
|
function setupRaceConditionInReplication(fn) {
|
|
var bulkUpdate = TargetModel.bulkUpdate;
|
|
TargetModel.bulkUpdate = function(data, cb) {
|
|
// simulate the situation when a 3rd party modifies the database
|
|
// while a replication run is in progress
|
|
var self = this;
|
|
fn(function(err) {
|
|
if (err) return cb(err);
|
|
|
|
bulkUpdate.call(self, data, cb);
|
|
});
|
|
|
|
// apply the 3rd party modification only once
|
|
TargetModel.bulkUpdate = bulkUpdate;
|
|
};
|
|
}
|
|
|
|
function verifyInstanceWasReplicated(source, target, id) {
|
|
return function verify(next) {
|
|
source.findById(id, function(err, expected) {
|
|
if (err) return next(err);
|
|
|
|
target.findById(id, function(err, actual) {
|
|
if (err) return next(err);
|
|
|
|
expect(actual && actual.toObject())
|
|
.to.eql(expected && expected.toObject());
|
|
debug('replicated instance: %j', actual);
|
|
|
|
next();
|
|
});
|
|
});
|
|
};
|
|
}
|
|
|
|
function spyAndStoreSinceArg(Model, methodName, store) {
|
|
var orig = Model[methodName];
|
|
Model[methodName] = function(since) {
|
|
store.push(since);
|
|
orig.apply(this, arguments);
|
|
};
|
|
}
|
|
|
|
function getPropValue(obj, name) {
|
|
return Array.isArray(obj) ?
|
|
obj.map(function(it) { return getPropValue(it, name); }) :
|
|
obj[name];
|
|
}
|
|
|
|
function getIds(list) {
|
|
return getPropValue(list, 'id');
|
|
}
|
|
});
|