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mqtt-reqres-broker

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mqtt request/response websocket broker

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<!DOCTYPE html><html lang="en"><head><title>brokerSpec</title></head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0"><meta name="groc-relative-root" content=""><meta name="groc-document-path" content="brokerSpec"><meta name="groc-project-path" content="test/brokerSpec.js"><link rel="stylesheet" type="text/css" media="all" href="assets/style.css"><script type="text/javascript" src="assets/behavior.js"></script><body><div id="meta"><div class="file-path">test/brokerSpec.js</div></div><div id="document"><div class="segment"><div class="comments "><div class="wrapper"><h2 id="brokerspec">brokerSpec</h2> <p>usage: $ DEBUG=brokerSpec mocha</p></div></div><div class="code"><div class="wrapper"><span class="hljs-keyword">const</span> debug = <span class="hljs-built_in">require</span>(<span class="hljs-string">'debug'</span>)(<span class="hljs-string">'mqtt-reqres-broker'</span>); <span class="hljs-keyword">const</span> assert = <span class="hljs-built_in">require</span>(<span class="hljs-string">'assert'</span>); <span class="hljs-keyword">const</span> MqttReqResBroker = <span class="hljs-built_in">require</span>(<span class="hljs-string">'../lib/mqtt-reqres-broker.js'</span>); <span class="hljs-keyword">const</span> mqtt = <span class="hljs-built_in">require</span>(<span class="hljs-string">'mqtt'</span>); <span class="hljs-keyword">const</span> serverOptions = { hostname: <span class="hljs-string">'localhost'</span>, port: <span class="hljs-number">9999</span> }; <span class="hljs-keyword">const</span> wsBroker = <span class="hljs-keyword">new</span> MqttReqResBroker(); <span class="hljs-keyword">var</span> mqttClientA, mqttClientB; <span class="hljs-keyword">const</span> clientAId = <span class="hljs-string">'client-a'</span>, clientBId = <span class="hljs-string">'client-b'</span>; <span class="hljs-keyword">const</span> clientAChannelId = <span class="hljs-string">'client-a-channel-id'</span>; <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">pcatch</span> (<span class="hljs-params">reason</span>) </span>{ debug(reason); assert(!reason, reason); } <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">startServer</span> (<span class="hljs-params">callback</span>) </span>{ debug(<span class="hljs-string">'startServer()'</span>); wsBroker.initialize(serverOptions, err =&gt; { <span class="hljs-keyword">if</span> (err) { <span class="hljs-built_in">console</span>.error(err.stack); callback(err); } <span class="hljs-keyword">else</span> { wsBroker.start(<span class="hljs-literal">null</span>, err =&gt; { <span class="hljs-keyword">if</span> (err) { <span class="hljs-built_in">console</span>.error(err.stack); } <span class="hljs-keyword">else</span> { <span class="hljs-built_in">console</span>.log(<span class="hljs-string">`broker running at http://<span class="hljs-subst">${wsBroker.hostname}</span>:<span class="hljs-subst">${wsBroker.port}</span>/`</span>); } callback(err); }); } }); } <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">connectClient</span> (<span class="hljs-params">clientId</span>) </span>{ <span class="hljs-keyword">return</span> mqtt.connect({ protocol: <span class="hljs-string">'ws'</span>, host: serverOptions.hostname, port: serverOptions.port, clientId: clientId || <span class="hljs-built_in">Math</span>.random().toString(<span class="hljs-number">36</span>).substr(<span class="hljs-number">2</span>, <span class="hljs-number">23</span>) }); } <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">onClientConnect</span> (<span class="hljs-params">brokerClient</span>) </span>{ assert.strictEqual(brokerClient.clientId, onClientConnect.mqttClient.clientId); setTimeout(() =&gt; { assert(onClientConnect.mqttClient.connected, <span class="hljs-string">'mqtt client should be connected'</span>); onClientConnect.callbackFn(); }, <span class="hljs-number">100</span>); } onClientConnect.configure = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">mqttClient, callbackFn</span>) </span>{ onClientConnect.mqttClient = mqttClient; onClientConnect.callbackFn = callbackFn; }; describe(<span class="hljs-string">'broker'</span>, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) </span>{ before(done =&gt; { startServer(err =&gt; { wsBroker.mqtt.on(<span class="hljs-string">'client'</span>, onClientConnect); done(); }); }); after(done =&gt; { wsBroker.close(done); }); describe(<span class="hljs-string">'connecting mqtt clients to broker via websockets'</span>, () =&gt; { it(<span class="hljs-string">'should connect to mqtt client A'</span>, done =&gt; { mqttClientA = connectClient(clientAId); onClientConnect.configure(mqttClientA, done); }); it(<span class="hljs-string">'should connect to mqtt client B'</span>, done =&gt; { mqttClientB = connectClient(clientBId); onClientConnect.configure(mqttClientB, done); }); }); describe(<span class="hljs-string">'client subscriptions on topic "connect/&amp;lt;device-id&amp;gt;/+"'</span>, () =&gt; { it(<span class="hljs-string">'should client A subscribe on topic "connect/'</span> + clientAId + <span class="hljs-string">'/+"'</span>, done =&gt; { mqttClientA.subscribe( <span class="hljs-string">`connect/<span class="hljs-subst">${clientAId}</span>/+`</span>, {qos: <span class="hljs-number">0</span>}, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err, granted</span>) </span>{ assert(!err); assert.strictEqual(granted[<span class="hljs-number">0</span>].qos, <span class="hljs-number">0</span>); done(); } ); }); it(<span class="hljs-string">'should client B subscribe on topic "connect/'</span> + clientBId + <span class="hljs-string">'/+"'</span>, done =&gt; { mqttClientA.subscribe( <span class="hljs-string">`connect/<span class="hljs-subst">${clientBId}</span>/+`</span>, {qos: <span class="hljs-number">0</span>}, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err, granted</span>) </span>{ assert(!err); assert.strictEqual(granted[<span class="hljs-number">0</span>].qos, <span class="hljs-number">0</span>); done(); } ); }); it(<span class="hljs-string">'should refuse to subscribe -t connect on invalid topics'</span>, done =&gt; { <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">promiseTest</span> (<span class="hljs-params">topic</span>) </span>{ <span class="hljs-keyword">return</span> <span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">resolve</span>) </span>{ mqttClientA.subscribe( topic, {qos: <span class="hljs-number">0</span>}, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err, granted</span>) </span>{ assert(!err); assert(granted[<span class="hljs-number">0</span>].qos &gt; <span class="hljs-number">2</span>, <span class="hljs-string">'should not have subscribed -t connect on topic '</span> + topic); resolve(); } ); }); } <span class="hljs-built_in">Promise</span>.all( [</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><p><code>connect/${clientBId}/+</code>, </p></div></div><div class="code"><div class="wrapper"> <span class="hljs-string">`invalid/<span class="hljs-subst">${clientBId}</span>/+`</span>, <span class="hljs-string">`connect`</span>, <span class="hljs-string">`connect/`</span>, <span class="hljs-string">`connect//`</span>, <span class="hljs-string">`connect/+`</span>, <span class="hljs-string">`connect/#`</span>, <span class="hljs-string">`connect/<span class="hljs-subst">${clientBId}</span>/#`</span>, <span class="hljs-string">`connect/<span class="hljs-subst">${clientBId}</span>/`</span>, <span class="hljs-string">`connect/<span class="hljs-subst">${clientBId}</span>`</span>, <span class="hljs-string">`connect/<span class="hljs-subst">${clientBId}</span>/+/invalid`</span>, <span class="hljs-string">`connect/<span class="hljs-subst">${clientBId}</span>/invalid/+`</span> ].map(promiseTest) ) .then(() =&gt; done()) .catch(pcatch); }); }); describe(<span class="hljs-string">'connecting client A to client B'</span>, () =&gt; { it(<span class="hljs-string">'should subscribe -t message/'</span> + clientBId + <span class="hljs-string">'/'</span> + clientAChannelId + <span class="hljs-string">'/# '</span>, done =&gt; {</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><p>open a message channel to enable client-a to send messages:</p> <p>subscribe -t message/&lt;client-b-id&gt;/&lt;client-a-channel-id&gt;/# </p></div></div><div class="code"><div class="wrapper"> mqttClientA.subscribe( <span class="hljs-string">`message/<span class="hljs-subst">${clientBId}</span>/<span class="hljs-subst">${clientAChannelId}</span>/#`</span>, {qos: <span class="hljs-number">0</span>}, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err, granted</span>) </span>{ assert(!err); assert.strictEqual(granted[<span class="hljs-number">0</span>].qos, <span class="hljs-number">0</span>); done(); } ); }); it(<span class="hljs-string">'should refuse to subscribe -t message on invalid topics'</span>, done =&gt; { <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">promiseTest</span> (<span class="hljs-params">topic</span>) </span>{ <span class="hljs-keyword">return</span> <span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">resolve</span>) </span>{ mqttClientA.subscribe( topic, {qos: <span class="hljs-number">0</span>}, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err, granted</span>) </span>{ assert(!err); assert(granted[<span class="hljs-number">0</span>].qos &gt; <span class="hljs-number">2</span>, <span class="hljs-string">'should not have subscribed -t message on topic '</span> + topic); resolve(); } ); }); } <span class="hljs-built_in">Promise</span>.all( [</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><p><code>message/${clientBId}/${clientAChannelId}/#</code>, </p></div></div><div class="code"><div class="wrapper"> <span class="hljs-string">`invalid/<span class="hljs-subst">${clientBId}</span>/<span class="hljs-subst">${clientAChannelId}</span>/#`</span>, <span class="hljs-string">`message`</span>, <span class="hljs-string">`message/`</span>, <span class="hljs-string">`message//`</span>, <span class="hljs-string">`message//+`</span>, <span class="hljs-string">`message/#`</span>, <span class="hljs-string">`message/<span class="hljs-subst">${clientBId}</span>/#`</span>, <span class="hljs-string">`message/<span class="hljs-subst">${clientBId}</span>/<span class="hljs-subst">${clientAChannelId}</span>/+`</span>, <span class="hljs-string">`message/<span class="hljs-subst">${clientBId}</span>/<span class="hljs-subst">${clientAChannelId}</span>/+/bar`</span>, <span class="hljs-string">`message/<span class="hljs-subst">${clientBId}</span>/<span class="hljs-subst">${clientAChannelId}</span>/foo/bar`</span>, <span class="hljs-string">`message/from-client-id/`</span>, <span class="hljs-string">`message/from-client-id`</span>, <span class="hljs-string">`message/from-client-id/+`</span>, <span class="hljs-string">`message/from-client-id/invalid/+`</span> ].map(promiseTest) ) .then(() =&gt; done()) .catch(pcatch); }); it(<span class="hljs-string">`should publish -t connect/<span class="hljs-subst">${clientBId}</span>/<span class="hljs-subst">${clientAId}</span> -m <span class="hljs-subst">${clientAChannelId}</span>`</span>, done =&gt; {</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><p>client-a publishes client-a-channel-id as message to client-b:</p> <p>publish -t connect/&lt;client-b-id&gt;/&lt;client-a-id&gt; -m &lt;client-a-channel-id&gt; </p></div></div><div class="code"><div class="wrapper"> mqttClientA.publish(</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><p>topic</p></div></div><div class="code"><div class="wrapper"> <span class="hljs-string">`connect/<span class="hljs-subst">${clientBId}</span>/<span class="hljs-subst">${clientAId}</span>`</span>, </div></div></div><div class="segment"><div class="comments "><div class="wrapper"><p>message</p></div></div><div class="code"><div class="wrapper"> clientAChannelId,</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><p>options</p></div></div><div class="code"><div class="wrapper"> {qos: <span class="hljs-number">0</span>}, </div></div></div><div class="segment"><div class="comments "><div class="wrapper"><p>callback</p></div></div><div class="code"><div class="wrapper"> <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err</span>) </span>{ assert(!err); done(); } ); }); }); describe(<span class="hljs-string">'sending messages between clients'</span>, () =&gt; {</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><p>sending messages</p> <p>publish -t message/&lt;from&gt;/&lt;to&gt;</p> <p>publish -t message/&lt;from-device-id&gt;/&lt;to-channel-id&gt;</p> <p>publish -t message/&lt;client-b-id&gt;/&lt;client-a-channel-id&gt;/foo -m &#39;{packetId:123}&#39; </p></div></div><div class="code"><div class="wrapper"> it(<span class="hljs-string">'should enable client B to send messages to client A'</span>, done =&gt; { mqttClientA.on(<span class="hljs-string">'message'</span>, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">topic, payload</span>) </span>{ <span class="hljs-keyword">if</span> (topic === <span class="hljs-string">`message/<span class="hljs-subst">${clientBId}</span>/<span class="hljs-subst">${clientAChannelId}</span>/foo`</span>) { assert.strictEqual(payload.toString(), <span class="hljs-string">'bar'</span>); done(); } }); mqttClientB.publish(</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><p>topic</p></div></div><div class="code"><div class="wrapper"> <span class="hljs-string">`message/<span class="hljs-subst">${clientBId}</span>/<span class="hljs-subst">${clientAChannelId}</span>/foo`</span>, </div></div></div><div class="segment"><div class="comments "><div class="wrapper"><p>message</p></div></div><div class="code"><div class="wrapper"> <span class="hljs-string">'bar'</span>,</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><p>options</p></div></div><div class="code"><div class="wrapper"> {qos: <span class="hljs-number">0</span>} ); }); }); describe(<span class="hljs-string">'unsubscription of clients'</span>, () =&gt; { it(<span class="hljs-string">'should unsubscribe client A'</span>, done =&gt; { assert(mqttClientA.connected); mqttClientA.end(<span class="hljs-literal">false</span>, () =&gt; { assert(!mqttClientA.connected); mqttClientB.end(<span class="hljs-literal">false</span>, () =&gt; { done(); }); }); }); }); });</div></div></div></div></body></html>