chore(build): Karma watches broccoli output.

This is a prerequisite for switching to TypeScript. We need to remove the Traceur preprocessor
from Karma, so we have the build specified in a single place (broccoli tree def'n).

gulpfile.js

@@ -24,7 +24,7 @@ var jsserve = require('./tools/build/jsserve');
 var pubserve = require('./tools/build/pubserve');
 var rundartpackage = require('./tools/build/rundartpackage');
 var file2moduleName = require('./tools/build/file2modulename');
-var karma = require('karma').server;
+var karma = require('karma');
 var minimist = require('minimist');
 var runServerDartTests = require('./tools/build/run_server_dart_tests');
 var sourcemaps = require('gulp-sourcemaps');
@@ -320,18 +320,41 @@ function getBrowsersFromCLI() {
   var args = minimist(process.argv.slice(2));
   return [args.browsers?args.browsers:'DartiumWithWebPlatform']
 }
-gulp.task('test.unit.js', function (done) {
-  karma.start({configFile: __dirname + '/karma-js.conf.js'}, done);
+
+gulp.task('test.unit.js', ['build/clean.js'], function (neverDone) {
+
+  function buildAndTest() {
+    runSequence(
+      'broccoli.js.dev',
+      'test.unit.dev/karma-run'
+    );
+  }
+
+  karma.server.start({configFile: __dirname + '/karma-js.conf.js'});
+  buildAndTest();
+
+  gulp.watch('modules/**', function() {
+    console.log('args', arguments);
+    buildAndTest();
   });
+});
+
+gulp.task('test.unit.dev/karma-run', function(done) {
+  karma.runner.run({configFile: __dirname + '/karma-js.conf.js'}, done);
+});
+
+
 gulp.task('test.unit.dart', function (done) {
-  karma.start({configFile: __dirname + '/karma-dart.conf.js'}, done);
+  karma.server.start({configFile: __dirname + '/karma-dart.conf.js'}, done);
 });
+
 gulp.task('test.unit.js/ci', function (done) {
-  karma.start({configFile: __dirname + '/karma-js.conf.js',
+  karma.server.start({configFile: __dirname + '/karma-js.conf.js',
     singleRun: true, reporters: ['dots'], browsers: getBrowsersFromCLI()}, done);
 });
+
 gulp.task('test.unit.dart/ci', function (done) {
-  karma.start({configFile: __dirname + '/karma-dart.conf.js',
+  karma.server.start({configFile: __dirname + '/karma-dart.conf.js',
       singleRun: true, reporters: ['dots'], browsers: getBrowsersFromCLI()}, done);
 });
 

karma-js.conf.js

@@ -10,8 +10,7 @@ module.exports = function(config) {
     files: [
       // Sources and specs.
       // Loaded through the es6-module-loader, in `test-main.js`.
-      {pattern: 'modules/**', included: false},
-      {pattern: 'tools/transpiler/spec/**', included: false},
+      {pattern: 'dist/js/dev/es5/**', included: false, watched: false},
 
       'node_modules/traceur/bin/traceur-runtime.js',
       'node_modules/es6-module-loader/dist/es6-module-loader-sans-promises.src.js',
@@ -28,34 +27,9 @@ module.exports = function(config) {
     ],
 
     exclude: [
-      'modules/**/e2e_test/**'
+      'dist/js/dev/es5/**/e2e_test/**',
     ],
 
-    preprocessors: {
-      'modules/**/*.js': ['traceur'],
-      'modules/**/*.es6': ['traceur'],
-      'tools/transpiler/spec/**/*.js': ['traceur'],
-      'tools/transpiler/spec/**/*.es6': ['traceur'],
-    },
-
-    traceurPreprocessor: {
-      options: {
-        outputLanguage: 'es5',
-        sourceMaps: true,
-        script: false,
-        memberVariables: true,
-        modules: 'instantiate',
-        types: true,
-        typeAssertions: true,
-        typeAssertionModule: 'rtts_assert/rtts_assert',
-        annotations: true
-      },
-      resolveModuleName: file2moduleName,
-      transformPath: function(fileName) {
-        return fileName.replace(/\.es6$/, '.js');
-      }
-    },
-
     customLaunchers: {
       DartiumWithWebPlatform: {
         base: 'Dartium',
@@ -68,6 +42,4 @@ module.exports = function(config) {
 
     port: 9876
   });
-
-  config.plugins.push(require('./tools/transpiler/karma-traceur-preprocessor'));
 };

test-main.js

@@ -9,15 +9,16 @@ jasmine.DEFAULT_TIMEOUT_INTERVAL = 100;
 // we will call `__karma__.start()` later, once all the specs are loaded.
 __karma__.loaded = function() {};
 
-
-System.baseURL = '/base/modules/';
+System.baseURL = '/base/';
 
 // So that we can import packages like `core/foo`, instead of `core/src/foo`.
 System.paths = {
   '*': './*.js',
-  'transpiler/*': '../tools/transpiler/*.js',
-  'rx/*': '../node_modules/rx/*.js'
-}
+  'benchpress/*': 'dist/js/dev/es5/benchpress/*.js',
+  'angular2/*': 'dist/js/dev/es5/angular2/*.js',
+  'rtts_assert/*': 'dist/js/dev/es5/rtts_assert/*.js',
+  'rx/*': 'node_modules/rx/*.js'
+};
 
 // Import all the specs, execute their `main()` method and kick off Karma (Jasmine).
 System.import('angular2/src/dom/browser_adapter').then(function(browser_adapter) {

tools/build/file2modulename.js

@@ -3,6 +3,8 @@ function file2moduleName(filePath) {
     // module name should be relative to `modules` and `tools` folder
     .replace(/.*\/modules\//, '')
     .replace(/.*\/tools\//, '')
+    //  and 'dist' folder
+    .replace(/.*\/dist\/js\/dev\/es5\//, '')
     // module name should not include `lib`, `web` folders
     // as they are wrapper packages for dart
     .replace(/\/web\//, '/')