如何检查我的元素已在单元测试被集中 [英] How do I check if my element has been focussed in a unit test

问题描述

我有以下的指令自动对焦字段：

  .directive（'ngAutofocus'，函数（$超时）{
    返回{
        限制：'A'，
        链接：功能（范围，榆）{
                $超时（函数（）{
                榆树[0]。重点（）;
            }）;
        }
    };
}
 

如何将我的单元测试吗？我试过几件事情像下面的选择，但他们都返回错误或虚假的：

 的console.log（$（榆[0]）是（'：聚焦'））;
 

我的单元测试的设置是这样的：

 榆树= angular.element（'＆LT;输入类型=文本名称=textfield1的NG-自动对焦＆GT;'）;
$ $范围摘要（）。
$编译（榆树）（$范围内）;
 

解决方案

我想通了，这是pretty实际上明显;

 它（'应该将重点放在超时'，函数（）{
    spyOn（榆[0]，聚焦）;
    $ timeout.flush（）;
    期待（榆树[0]。重点）.toHaveBeenCalled（）;
}）
 

我的问题是双重的：

1. 我没有打电话超时冲洗功能，因此超时不存在的，而


2. 我是想看看元素的焦点属性，而只是看着对焦（）函数的调用更像单元测试。焦点属性的东西，确实属于端到端测试的领土。

I have the following directive to autofocus a field:

.directive('ngAutofocus', function ($timeout) {
    return {
        restrict: 'A',
        link: function (scope, elm) {
                $timeout(function () {
                elm[0].focus();
            });
        }
    };
}

How would I unit test this? I tried several things like the following selector but they all return errors or false:

console.log($(elm[0]).is(':focus'));

My unit test is set up like this:

elm = angular.element('<input type="text"  name="textfield1" ng-autofocus>');
$scope.$digest();
$compile(elm)($scope);

解决方案

I figured it out, and it was pretty obvious actually;

it('should set the focus on timeout', function () {
    spyOn(elm[0],'focus');
    $timeout.flush();
    expect(elm[0].focus).toHaveBeenCalled();
})

My problem was two-fold:

1. I wasn't calling the timeout flush function so timeout wasn't occuring, and
2. I was trying to look at the focus attribute of the element whereas just looking at the call of the focus() function is much more like unit-testing. The focus attribute is something that really belongs to the e2e testing territory.

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