无法让 Karma 运行我的 Angular2 测试

Question

I feel like I have tried everything. The files are found, even the simplest tests won't run. I show this:

Chrome 49.0.2623 (Windows 7 0.0.0): Executed 0 of 0 SUCCESS (0 secs / 0 secs) Chrome 49.0.2623 (Windows 7 0.0.0): Executed 0 of 0 ERROR (0.003 secs / 0 secs)

I feel like I've tried everything. I've tried different frameworks, Mocha/Chai - Jasmine, nothing. The debug tab doesn't show anything in chrome when I click it.

Project Dir: http://pastebin.com/1wQubhCt

karma.shim.js: http://pastebin.com/PtPnL82G

karma.conf.js: http://pastebin.com/CU0aqnj6

Example test (obviously expect to fail):

import {
  it,
  expect,
  describe,
  beforeEachProviders
} from 'angular2/testing';

describe('myComponent', () => {
  beforeEachProviders([]);

  describe('creation', () => {
    it('should do this', ()=> {
      expect(1).toEqual(2)
    })
  });
});

Answer 1

At this point I recommend using Angular CLI when setting up an angular 2.0 project from scratch. It gives you a functional unit test runner and auto reloading for the website whenever you make a code change.

It removes all the tedious configuration steps you have to go through to set up the project.

Check it out here: https://github.com/angular/angular-cli

Answer 2

Running tests within Karma can be a bit painful because of the karma.shim.js file. Most of time the problem is in this file.

I think that there is a problem in this file and more particularly in the onlySpecFiles function. This should be /_test\\.js$/ instead of /_test\\.ts$/ :

function onlySpecFiles(path) {
  return /_test\.ts$/.test(path);
}

You could see this question for more details:

• Karma cannot load imported files

Answer 3

对我来说，这个问题是通过更新 Angular-CLI 解决的：

npm install --save-dev @angular/cli@latest