Add support for Feathers v3 sub-apps

LICENSE

@@ -1,6 +1,6 @@
 ## MIT License
 
-Copyright (C) 2015 [Feathers contributors](https://github.com/feathersjs/feathers/graphs/contributors)
+Copyright (C) 2017 [Feathers contributors](https://github.com/feathersjs/feathers/graphs/contributors)
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 

lib/application.js

@@ -79,15 +79,27 @@ const application = {
 
   use (path, service, options = {}) {
     const location = stripSlashes(path);
-    const hasMethod = methods => methods.some(name =>
+    const isSubApp = typeof service.service === 'function' && service.services;
+    const isService = this.methods.concat('setup').some(name =>
       (service && typeof service[name] === 'function')
     );
 
-    if (!hasMethod(this.methods.concat('setup'))) {
+    if (isSubApp) {
+      const subApp = service;
+
+      Object.keys(subApp.services).forEach(subPath =>
+        this.use(`${location}/${subPath}`, subApp.service(subPath))
+      );
+
+      return this;
+    }
+
+    if (!isService) {
       throw new Error(`Invalid service object passed for path \`${location}\``);
     }
 
-    const protoService = Proto.extend(service);
+    // If the service is already Uberproto'd use it directly
+    const protoService = Proto.isPrototypeOf(service) ? service : Proto.extend(service);
 
     debug(`Registering new service at \`${location}\``);
 

test/application.test.js

@@ -317,4 +317,61 @@ describe('Feathers application', () => {
       app.setup();
     });
   });
+
+  describe('sub apps', () => {
+    it('re-registers sub-app services with prefix', done => {
+      const app = feathers();
+      const subApp = feathers();
+
+      subApp.use('/service1', {
+        get (id) {
+          return Promise.resolve({
+            id, name: 'service1'
+          });
+        }
+      }).use('/service2', {
+        get (id) {
+          return Promise.resolve({
+            id, name: 'service2'
+          });
+        },
+
+        create (data) {
+          return Promise.resolve(data);
+        }
+      });
+
+      app.use('/api/', subApp);
+
+      app.service('/api/service2').once('created', data => {
+        assert.deepEqual(data, {
+          message: 'This is a test'
+        });
+
+        subApp.service('service2').once('created', data => {
+          assert.deepEqual(data, {
+            message: 'This is another test'
+          });
+
+          done();
+        });
+
+        app.service('api/service2').create({
+          message: 'This is another test'
+        });
+      });
+
+      app.service('/api/service1').get(10).then(data => {
+        assert.equal(data.name, 'service1');
+
+        return app.service('/api/service2').get(1);
+      }).then(data => {
+        assert.equal(data.name, 'service2');
+
+        return subApp.service('service2').create({
+          message: 'This is a test'
+        });
+      });
+    });
+  });
 });