如何使用chai-as-promised、拒绝的承诺和错误消息进行测试？

Question

我正在尝试检查被拒绝的promise上的错误消息，如果我在测试中将消息字符串弄错了，它仍然可以通过。

MyService.doSomething({ id: 12345 }).should.eventually.be.rejectedWith(TypeError, 'no attr foo defined2');



  svc.doSomething = function(thing){
    var def = $q.defer();

    if ( !thing.foo ) {
        def.reject(new Error('no attr foo defined'));
    } else {
        def.resolve(thing);
    }

    return def.promise;
  };

更新，我的测试似乎不能正常工作。当我返回时，它会超时：

  it.only('should error', function(){
    // todo this should fail but it just times out
    return MyService.doSomething({ id: 12345 }).should.eventually.be.rejectedWith(TypeError, 'no attr foo defined2');
  });







  svc.doSomething = function(thing){
    var def = $q.defer();

    if ( !thing.foo ) {
        def.reject(new Error('no attr foo defined'));
    } else {
        def.resolve(thing);
    }

    return def.promise;
  };

下面是错误：

Error: timeout of 4000ms exceeded. Ensure the done() callback is being called in this test.

Answer 1

您忘记了调用之前的最终结果和返回结果。

return MyService.doSomething({ id: 12345 }).should.eventually.be.rejectedWith...