Add comms tests.

test/red/comms_spec.js

@@ -13,10 +13,114 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  **/
-var should = require("should");
 
-describe("red/comms", function() {
+var should = require("should");
-    it('can be required without errors', function() {
+var http = require('http');
-        require("../../red/comms");
+var express = require('express');
+var app = express();
+var WebSocket = require('ws');
+
+var comms = require("../../red/comms.js");
+var address = '127.0.0.1';
+var listenPort = 0; // use ephemeral port
+
+describe("comms", function() {
+    var server;
+    var url;
+    var port;
+    before(function(done) {
+        server = http.createServer(function(req,res){app(req,res)});
+        comms.init(server, {});
+        server.listen(listenPort, address);
+        server.on('listening', function() {
+            port = server.address().port;
+            url = 'http://' + address + ':' + port + '/comms';
+            comms.start();
+            done();
         });
+    });
+
+    it('accepts connection', function(done) {
+        var ws = new WebSocket(url);
+        ws.on('open', function() {
+            ws.close();
+            done();
+        });
+    });
+
+    it('publishes message after subscription', function(done) {
+        var ws = new WebSocket(url);
+        ws.on('open', function() {
+            ws.send('{"subscribe":"topic1"}');
+            comms.publish('topic1', 'foo');
+        });
+        ws.on('message', function(msg) {
+            msg.should.equal('{"topic":"topic1","data":"foo"}');
+            ws.close();
+            done();
+        });
+    });
+
+    it('publishes retained message for subscription', function(done) {
+        comms.publish('topic2', 'bar', true);
+        var ws = new WebSocket(url);
+        ws.on('open', function() {
+            ws.send('{"subscribe":"topic2"}');
+        });
+        ws.on('message', function(msg) {
+            msg.should.equal('{"topic":"topic2","data":"bar"}');
+            ws.close();
+            done();
+        });
+    });
+
+    it('retained message is deleted by non-retained message', function(done) {
+        comms.publish('topic3', 'retained', true);
+        comms.publish('topic3', 'non-retained');
+        var ws = new WebSocket(url);
+        ws.on('open', function() {
+            ws.send('{"subscribe":"topic3"}');
+            comms.publish('topic3', 'new');
+        });
+        ws.on('message', function(msg) {
+            msg.should.equal('{"topic":"topic3","data":"new"}');
+            ws.close();
+            done();
+        });
+    });
+
+    it('malformed messages are ignored',function(done) {
+        var ws = new WebSocket(url);
+        ws.on('open', function() {
+            ws.send('not json');
+            ws.send('[]');
+            ws.send('{"subscribe":"topic3"}');
+            comms.publish('topic3', 'correct');
+        });
+        ws.on('message', function(msg) {
+            msg.should.equal('{"topic":"topic3","data":"correct"}');
+            ws.close();
+            done();
+        });
+    });
+
+    // The following test currently fails due to minimum viable
+    // implementation. More test should be written to test topic
+    // matching once this one is passing
+
+    if (0) {
+        it('receives message on correct topic', function(done) {
+            var ws = new WebSocket(url);
+            ws.on('open', function() {
+                ws.send('{"subscribe":"topic4"}');
+                comms.publish('topic5', 'foo');
+                comms.publish('topic4', 'bar');
+            });
+            ws.on('message', function(msg) {
+                msg.should.equal('{"topic":"topic4","data":"bar"}');
+                ws.close();
+                done();
+            });
+        });
+    }
 });