lib/controller: ignore test files

`lib/controller` now ignore test files. Not ignoring test files would means that
the runner would try to load them into the client resulting in errors.

Update tests to check this behavior.

Fixes #12.

lib/controller.js

@@ -14,6 +14,9 @@ module.exports = root => {
               // Remove the file we already read
               files.splice(files.indexOf(module + '.js'), 1);
 
+              // Ignore test files
+              files = files.filter(filename => !filename.endsWith('.test.js'));
+
               Promise.all(files.map(
                 f => fs.readFile(root + '/' + module + '/' + f, 'utf8')
               ))

lib/controller.test.js

@@ -5,10 +5,12 @@ jest.mock('mz/fs');
 describe('loadModules', () => {
   const MOCK_FILES = {
     '/test/controller/controller.js': '1',
-    '/test/controller/test.js': '2',
+    '/test/controller/controller.test.js': 'sometest',
+    '/test/controller/file.js': '2',
+    '/test/controller/file.test.js': 'sometest',
     '/test/lib/lib.js': '3',
     '/test/robot/robot.js': '4',
-    '/test/notavalidmodule/test.js': '5'
+    '/test/notavalidmodule/file.js': '5'
   };
 
   beforeEach(() => {
@@ -16,7 +18,7 @@ describe('loadModules', () => {
   });
 
   describe('loading a module', () => {
-    test('should include all (and only) files in its dir.', done => {
+    test('should include all (and only) non-test files in its dir.', done => {
       const controller = require('./controller.js')('/test');
 
       controller.load('controller')