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servicebusconnector-tests.js
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servicebusconnector-tests.js
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/**
* Copyright (c) Microsoft. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
var should = require('should')
, sinon = require('sinon');
var ServiceBusConnector = require('../lib/servicebusconnector');
var nodeId = 'aNode';
var topicName = 'aTopic';
var subscriptionName = 'aSubscription';
describe('Service Bus connection layer', function () {
describe('when starting', function () {
var connector;
var serviceBusService;
beforeEach(function () {
makeConnectorWithMockSB(function (sb, c) {
serviceBusService = sb;
connector = c;
});
connector.start();
});
it('should start polling service bus', function () {
serviceBusService.receiveSubscriptionMessage.calledOnce.should.be.true;
});
});
describe('when packing messages to send', function () {
var connector;
var serviceBusService;
beforeEach(function () {
makeConnectorWithMockSB(function (sb, c) {
serviceBusService = sb;
connector = c;
});
});
it('should put nodeId in correlation id', function () {
var packed = connector.packMessage('msg', 'hello');
packed.brokerProperties.CorrelationId.should.equal(nodeId);
});
it('should put message name in label', function () {
var packed = connector.packMessage('aMessage', [1, 2, 3]);
packed.brokerProperties.Label.should.equal('aMessage');
});
it('should round trip nodeId and message name through unpack', function () {
var packed = connector.packMessage('msg', 'hello');
var unpacked = connector.unpackMessage(packed);
unpacked.nodeId.should.equal(nodeId);
});
it('should round trip message args through unpack', function () {
var packed = connector.packMessage('msg', {a: 'hello', b: 5});
var unpacked = connector.unpackMessage(packed);
unpacked.args.a.should.equal('hello');
unpacked.args.b.should.equal(5);
});
it('should pull sequence number from broker properties', function () {
var packed = connector.packMessage('msg', 'world');
packed.brokerProperties.SequenceNumber = 53;
var unpacked = connector.unpackMessage(packed);
should.exist(unpacked.seq);
unpacked.seq.should.equal(53);
});
});
describe('when sending', function () {
var sb;
var connector;
beforeEach(function () {
makeConnectorWithMockSB(function (mockServiceBus, newConnector) {
sb = mockServiceBus;
connector = newConnector;
});
});
it('should pass sent message to servicebus', function () {
connector.send('msg', 'hello');
sb.sendTopicMessage.calledOnce.should.be.true;
});
it('should pack message that was sent', function () {
connector.send('msg', 'hello');
var sentMessage = sb.sendTopicMessage.firstCall.args[1];
sentMessage.body.should.equal('"hello"');
});
it('should emit sberror event if service bus send fails', function () {
var stub = sinon.stub().callsArgWith(2, new Error('Fake failure'));
sb.sendTopicMessage = stub;
var error = null;
connector.on('sberror', function (err) { console.log('there was an error'); error = err; })
connector.send('msg', 'hello', {seq: 6, next: 7});
error.should.exist;
});
});
describe('when receiving with one receive at a time', function () {
var sb;
var connector;
var receive;
beforeEach(function () {
sb = {
sendTopicMessage: sinon.spy(),
receiveSubscriptionMessage: sinon.spy(function (topic, subscription, callback) {
receive = callback;
}),
withFilter: sinon.spy()
};
makeConnector(sb, function (serviceBus, newConnector) {
connector = newConnector;
connector.start();
});
});
it('should raise message event when message is received', function (done) {
connector.on('message', function (nodeId, name, args, metadata) {
done();
});
receive(null, packMessage(connector, 'anotherNode', 'aMessage', [1, 2, 3], 8));
});
it('should pass nodeId from received message', function (done) {
connector.on('message', function (nodeId, name, args, metadata) {
nodeId.should.equal('anotherNode');
done();
});
receive(null, packMessage(connector, 'anotherNode', 'aMessage', [1, 2, 3], 8));
});
it('should pass message name from received message', function (done) {
connector.on('message', function (nodeId, name, args, metadata) {
name.should.equal('aMessage');
done();
});
receive(null, packMessage(connector, 'anotherNode', 'aMessage', [1, 2, 3], 8));
});
it('should pass message arguments from received message', function (done) {
connector.on('message', function (nodeId, name, args, metadata) {
args.should.have.length(3);
args[0].should.equal(3);
args[1].should.equal(1);
args[2].should.equal(4);
done();
});
receive(null, packMessage(connector, 'anotherNode', 'aMessage', [3, 1, 4], 8));
});
it('should pass sequence number from message properties', function(done) {
connector.on('message', function (nodeId, name, args, seq) {
seq.should.equal(7);
done();
});
receive(null, packMessage(connector, 'anotherNode', 'aMessage', [1, 5, 9], 7));
});
it('should repoll service bus after message is received', function () {
receive(null, packMessage(connector, 'anotherNode', 'aMessage', [3, 1, 4], 8));
sb.receiveSubscriptionMessage.calledTwice.should.be.true;
});
it('should not raise event and repoll on receive error', function (done) {
connector.on('message', function (nodeId, name, args, seq) {
done(new Error('Should not be called'));
});
receive(new Error('Fake error'), null);
sb.receiveSubscriptionMessage.calledTwice.should.be.true;
done();
});
it('should not raise message event and repoll on undeserializable message', function (done) {
connector.on('message', function (nodeId, name, args, seq) {
done(new Error('Message received when deserialization fails. This should not happen.'));
});
var msg = packMessage(connector, 'anotherNode', 'aMessage', null, 12);
msg.body = 'This is not valid JSON';
receive(null, msg);
sb.receiveSubscriptionMessage.calledTwice.should.be.true;
done();
});
it('should raise badmessage event on undeserializable message', function (done) {
connector.on('badmessage', function (nodeId, name, seq) {
nodeId.should.equal('anotherNode');
name.should.equal('aMessage');
seq.should.equal(12);
done();
});
var msg = packMessage(connector, 'anotherNode', 'aMessage', null, 12);
msg.body = 'This is not valid JSON';
receive(null, msg);
sb.receiveSubscriptionMessage.calledTwice.should.be.true;
});
});
describe('when receiving with multiple receives at a time', function () {
var sb;
var connector;
var receive;
var numReceives = 8;
beforeEach(function () {
receive = [];
sb = {
sendTopicMessage: sinon.spy(),
receiveSubscriptionMessage: sinon.spy(function (topic, subscription, callback) {
receive.push(callback);
}),
withFilter: sinon.spy()
};
connector = new ServiceBusConnector({
nodeId: nodeId,
topic: topicName,
subscription: subscriptionName,
serviceBusService: sb,
numReceives: numReceives
});
connector.start();
});
it('should raise message event when message is received', function (done) {
connector.on('message', function (nodeId, name, args, seq) {
done();
});
receive[0](null, packMessage(connector, 'anotherNode', 'aMessage', [1, 2, 3], 8));
receive.shift();
});
it('should repoll service bus after message is received', function () {
var originalCalls = sb.receiveSubscriptionMessage.callCount;
receive[0](null, packMessage(connector, 'anotherNode', 'aMessage', [3, 1, 4], 8));
receive.shift();
sb.receiveSubscriptionMessage.callCount.should.equal(originalCalls + 1);
});
it('should not raise event and repoll on receive error', function (done) {
var originalCalls = sb.receiveSubscriptionMessage.callCount;
connector.on('message', function (nodeId, name, args, seq) {
done(new Error('Should not be called'));
});
receive[0](new Error('Fake error'), null);
receive.shift();
sb.receiveSubscriptionMessage.callCount.should.equal(originalCalls + 1);
done();
});
it('should stop all receivers when stop callback fires', function (done) {
connector.stop(function () {
connector.receivesRunning.should.equal(0);
done();
});
receive.forEach(function (receiveFunc) {
receiveFunc(connector, 'someNode', 'someMessage', 'someArgs');
});
});
});
describe('when stopping', function () {
var sb;
var connector;
var receive;
beforeEach(function () {
sb = {
sendTopicMessage: sinon.spy(),
receiveSubscriptionMessage: sinon.spy(function (topic, subscription, callback) {
receive = callback;
}),
withFilter: sinon.spy()
};
makeConnector(sb, function (serviceBus, newConnector) {
connector = newConnector;
connector.start();
});
});
it('should stop polling service bus', function (done) {
connector.stop(function () {
sb.receiveSubscriptionMessage.calledOnce.should.be.true;
done();
});
receive(null, packMessage(connector, 'sourceNode', 'message', 'pending'));
});
it('should start polling again if started after being stopped', function (done) {
connector.stop(function () {
sb.receiveSubscriptionMessage.calledOnce.should.be.true;
connector.start();
sb.receiveSubscriptionMessage.calledTwice.should.be.true;
done();
});
receive(null, packMessage(connector, 'sourceNode', 'message', 'pending'));
});
});
});
function makeConnectorWithMockSB(callback) {
var sb = {
receiveSubscriptionMessage: sinon.spy(),
sendTopicMessage: sinon.spy(),
withFilter: function (filter) { return this; }
};
makeConnector(sb, callback);
}
function makeConnector(serviceBus, callback) {
var connector = new ServiceBusConnector({
nodeId: nodeId,
topic: topicName,
subscription: subscriptionName,
serviceBusService: serviceBus,
numReceives: 1
});
callback(serviceBus, connector);
}
function packMessage(connector, sourceNode, message, args, sequenceNumber) {
var packed = connector.packMessage(message, args);
packed.brokerProperties.CorrelationId = sourceNode;
packed.brokerProperties.SequenceNumber = sequenceNumber;
return packed;
}