feat(@angular/cli): added argument for karma configuration file (#4564)

Fix #183

packages/@angular/cli/commands/test.ts

@@ -14,13 +14,15 @@ export interface TestOptions {
   build?: boolean;
   sourcemap?: boolean;
   progress?: boolean;
+  config: string;
 }
 
 
 const TestCommand = EmberTestCommand.extend({
   availableOptions: [
     { name: 'watch', type: Boolean, default: true, aliases: ['w'] },
     { name: 'code-coverage', type: Boolean, default: false, aliases: ['cc'] },
+    { name: 'config', type: String, aliases: ['c'] },
     { name: 'single-run', type: Boolean, default: false, aliases: ['sr'] },
     { name: 'progress', type: Boolean, default: true},
     { name: 'browsers', type: String },

packages/@angular/cli/tasks/test.ts

@@ -8,7 +8,8 @@ export default Task.extend({
     const projectRoot = this.project.root;
     return new Promise((resolve) => {
       const karma = requireProjectModule(projectRoot, 'karma');
-      const karmaConfig = path.join(projectRoot, this.project.ngConfig.config.test.karma.config);
+      const karmaConfig = path.join(projectRoot, options.config ||
+        this.project.ngConfig.config.test.karma.config);
 
       let karmaOptions: any = Object.assign({}, options);
 

tests/e2e/tests/test/test.ts

@@ -1,7 +1,10 @@
 import { ng } from '../../utils/process';
+import { moveFile } from '../../utils/fs';
 
 export default function () {
   // make sure both --watch=false and --single-run work
   return ng('test', '--single-run')
-    .then(() => ng('test', '--watch=false'));
+    .then(() => ng('test', '--watch=false'))
+    .then(() => moveFile('./karma.conf.js', './karma.conf.bis.js'))
+    .then(() => ng('test', '--single-run', '--config', 'karma.conf.bis.js'));
 }