量角器-比较数字 [英] Protractor - compare numbers

问题描述

在我的程序中，我正在计算两个数字，我想确保将它们相减等于1.

In my program I'm calculating two numbers, and I want to make sure that subtraction of them equals 1.

这是代码:

var firstCount=element.all(by.repeater('app in userApps')).count();
var secondCount=element.all(by.repeater('app in userApps')).count();

到目前为止，这很好-我得到了数字.问题来了:

so far it's good- I'm getting the numbers. the problem comes next:

var sub=secondCount-firstCount;
expect(sub).toEqual(1);

我收到此错误:

Expected NaN to equal 1.

有什么主意吗?

推荐答案

firstCount和secondCount都是承诺，需要解决:

Both firstCount and secondCount are promises that are needed to be resolved:

element.all(by.repeater('app in userApps')).count().then(function (first) {
    element.all(by.repeater('app in userApps')).count().then(function(second) {
        expect(first - second).toEqual(1);
    })
});

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