Javascript Protractor 比较 promise 总和

Question

我试图从网页获取 3 个值，将其中 2 个值相加(货币例如 $2,213.93)，然后比较它是否等于第三个值。

Protractor 函数 locator.getText() 返回一个 promise ，我必须在 promise 内完成所有转换

这就是我尝试做的事情

从网页获取值(value)并将其转换:

    SettingsPage.prototype.getValueAndConvert = function (locator) {
        locator.getText().then(function (text) {
            numb = text.replace(/,/g, '');
            numb = numb.replace(/\$/g, '');
            numb= numb.replace(/\./g, '');
            numb = parseInt(numb);
            console.log(numb);
            return numb
         });
        };

断言值相等

            var workingBalancevalue = settings.getValueAndConvert(workingBalanceField);
            var totalInflowvalue = settings.getValueAndConvert(totalInflowField);
            var totalOutflowvalue = settings.getValueAndConvert(totalOutflowField);
            protractor.promise.all([totalInflowvalue, totalOutflowvalue, workingBalancevalue]).then(function (values) {
                expect((values[0]) + (values[1])).toEqual(values[2]);
            });

它可以工作，但是 console.log(numb) 的值是 NaN，所以这不是真的，因为它匹配 NaN 到 NaN

实际如何做？

Answer 1

答案是添加 promise 返回

 SettingsPage.prototype.getValueAndConvert = function (locator) {
        return locator.getText().then(function (text) {       // added return
            numb = text.replace(/,/g, '');
            numb = numb.replace(/\$/g, '');
            numb= numb.replace(/\./g, '');
            numb = parseInt(numb);
            console.log(numb);
            return numb
         });
        };