fix(plugins): Allow plugins to register middleware via server:middlew…

…are hook when in proxy mode - fixes #663

lib/server/proxy-server.js

@@ -80,7 +80,9 @@ function getOptions (bs, scripts) {
  * @returns {*}
  */
 function getPluginMiddleware (bs, scripts) {
-    return bs.pluginManager.hook("server:middleware", snippetUtils.getProxyMiddleware(scripts, bs.options.getIn(["scriptPaths", "versioned"])));
+    return bs.pluginManager.hook("server:middleware", [
+        snippetUtils.getProxyMiddleware(scripts, bs.options.getIn(["scriptPaths", "versioned"]))
+    ]);
 }
 
 /**

test/specs/plugins/user.plugins.proxy.js

@@ -0,0 +1,60 @@
+"use strict";
+
+var browserSync = require("../../../");
+var testUtils   = require("../../protractor/utils");
+var Immutable   = require("immutable");
+var sinon       = require("sinon");
+var request     = require("supertest");
+
+describe("Plugins: Should be able to register middleware when in proxy mode", function () {
+
+    var bs;
+    var app;
+    var spy;
+
+    before(function (done) {
+
+        browserSync.reset();
+
+        app = testUtils.getApp(Immutable.Map({scheme: "http"}));
+        app.server.listen();
+
+        spy = sinon.spy();
+
+        var config = {
+            proxy: "http://localhost:" + app.server.address().port,
+            open: false,
+            logLevel: "silent"
+        };
+
+        browserSync.use({
+            "plugin": function () {
+                /* noop */
+            },
+            "hooks": {
+                "server:middleware": function () {
+                    return function (req, res, next) {
+                        spy();
+                        next();
+                    };
+                }
+            },
+            "plugin:name": "KITTENZ"
+        });
+
+        bs = browserSync(config, done).instance;
+    });
+
+    after(function () {
+        bs.cleanup();
+    });
+    it("should serve the file", function (done) {
+        request(bs.server)
+            .get("/")
+            .set("accept", "text/html")
+            .end(function () {
+                sinon.assert.calledOnce(spy);
+                done();
+            });
+    });
+});