PhantomJS/CasperJS AssertExists()失败 [英] PhantomJS/CasperJS AssertExists() is failing

问题描述

我正在尝试检查网页中是否存在选择器，但casperjs找不到它.

I am trying to check wether a selector exists in my webpage but casperjs never finds it.

我尝试了两种方法:

1.不用等待

casper.then(function() {
    // search for 'casperjs' from google form
    this.test.assertExists('#search-form', 'the element exists');
    // this.test.assertExists('.glyphicon.glyphicon-plus', 'the element exists');
});

2.等待选择器

casper.waitForSelector('#search-form', function() {
    this.echo("I'm sure #search-form is available in the DOM");
});

3.另一种等待方式

casper.waitFor(function check() {
     return this.evaluate(function() {
         return $('#search-form').length == 1;
     });
 }, function then() {    // step to execute when check() is ok
     test.assertExists('#search-form', 'tabs area is found');
 }, function timeout() { // step to execute if check has failed
     this.echo("Timeout: page did not load in time...").exit();
 });

到目前为止，他们还没有找到选择器.而且此选择器是从html加载的，不是javascript插入的.

None of them has been able to find the selector so far. And this selector is loaded from the html, it is not inserted by the javascript.

有什么想法吗?

推荐答案

好吧，我认为您应该像这样检查选择器是否在您的网页中:

Well, I think you should check if your selector is in your webpage like that :

casper.then(function(){
    console.log(this.getPageContent());
});

命令-管道输出-:casperjs test yourFile.js > seePageContent.html

或者您可能更喜欢这种方式(如果需要，请稍候):

Or you might prefer this way (with a wait if needed) :

casper.then(function(){
    this.wait(3000,function(){
        var fs = require('fs');
        fs.write("seePageContent.html", this.getPageContent(), 'w');
    });
});

这样，您就知道您的元素是否存在.如果不是，则您的上一步是错误的.

That way you know if your element is present or not. If not, then your previous step is wrong.

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