Click函数在命令脚本中不起作用

Question

在nightwatchjs命令脚本中，我有以下代码；

exports.command = function(searchMakeQueryPage) {
  var solrMakes = searchMakeQueryPage.Make.filter(val => typeof val === 'string');
  console.log('number of sorl makes = ', solrMakes.length);
  this.elements('css selector', '#bfsDesktopFilters #ddl-make option', function (dropDownMakes) {
    var numMakes = dropDownMakes.value.length;
    console.log('number of element makes = ', numMakes);
    this.assert.equal(solrMakes.length,numMakes-1);
});

  var makeResults = [];
  this.elements('css selector', '#bfsDesktopFilters .search-filters__item #ddl-make > option', function (numberOfMakes) {
    numberOfMakes.value.forEach(element => {
        this.elementIdValue(element.ELEMENT, function (text) {
            makeResults.push(text.value);
        });
    });

  this.perform(function(){
    var randomMake = makeResults[Math.floor(Math.random()*makeResults.length)];
    var randomMakeHref = randomMake.replace(/\s/g , '-');
    console.log('random make = ', randomMake);
    console.log('random make href = ', randomMakeHref);
    this.click(`#bfsDesktopFilters #ddl-make option[value="${randomMake}"]`);
  });
  });
};

除了this.click(`#bfsDesktopFilters #ddl-make option[value="${randomMake}"]`);命令外，它的工作原理。

运行测试时，出现以下错误；

运行执行命令时出错：this.click不是函数

是这里引起问题的括号的位置，还是引起问题的this.click(`#bfsDesktopFilters #ddl-make option[value="${randomMake}"]`)命令的位置？

我之前在nightwatchjs命令脚本中使用过this.click命令，所以我知道应该可以。

任何帮助将不胜感激。谢谢。

Answer 1

您需要在正确的范围内单击运行。

方法1

exports.command = function(searchMakeQueryPage) {

  this.click = this.click.bind(this);

  this.perform(function(){
    this.click(`#bfsDesktopFilters #ddl-make option[value="${randomMake}"]`);
  });
};

方法2

exports.command = function(searchMakeQueryPage) {

  var self = this;

  this.perform(function(){
    self.click(`#bfsDesktopFilters #ddl-make option[value="${randomMake}"]`);
  });
};

方法3

exports.command = function(searchMakeQueryPage) {

  this.perform(() => {
    this.click(`#bfsDesktopFilters #ddl-make option[value="${randomMake}"]`);
  });
};