ShadowRoot dom 空手道中的元素访问问题 UI

Question

我正在尝试访问 ShadowRoot dom 树元素，但我面临的问题是我无法使用特定 html 元素来调用 .ShadowRoot，因为该元素是动态的（见下文html snippet id="vaadin-text-field-error-0"。所以我唯一能做的就是访问 class .vaadin-text-field-container，这是一个级别。基本上，下面是 html 代码片段，其中 returns 一条“错误消息 = 最多 255 个字符”，在我的 KarateUI 测试中，我试图断言该错误消息。到目前为止，我尝试了以下选项基于我读过以前的论坛查询，但运气不好，我永远无法访问 returns 文本“最多 255 个字符”的正确元素来执行断言：

尝试 1：

  * def test = script('.vaadin-text-field-container', '_.innerHTML')
  * print "Error Message is" + test

输出：

evaluation (js) failed: script('.vaadin-text-field-container', '_.innerHTML'), js eval failed twice:(function(){ var fun = function(_){ return _.innerHTML }; var e = document.querySelector(".vaadin-text-field-container"); return fun(e) })(), error: {"type":"object","subtype":"error","className":"TypeError","description":"TypeError: Cannot read property 'innerHTML' of null\n    at fun (<anonymous>:1:46)\n    at <anonymous>:1:130\n    at <anonymous>:1:139","objectId":"{\"injectedScriptId\":3,\"id\":3}"}

尝试 2：

  * def test = script('//*[@id="vaadin-text-field-error-0"]', '_.innerHTML')
  * print 'Error Message is :' + test

输出：

evaluation (js) failed: script('//*[@id="vaadin-text-field-error-0"]', '_.innerHTML'), js eval failed twice:(function(){ var fun = function(_){ return _.innerHTML }; var e = document.evaluate("//*[@id="vaadin-text-field-error-0"]", document, null, 9, null).singleNodeValue; return fun(e) })(), error: {"type":"object","subtype":"error","className":"SyntaxError","description":"SyntaxError: missing ) after argument list","objectId":"{\"injectedScriptId\":3,\"id\":3}"}

尝试 3：

* match text('#vaadin-text-field-error-0') == '255 characters max'

输出：

evaluation (js) failed: text('#vaadin-text-field-error-0'), js eval failed twice:document.querySelector("#vaadin-text-field-error-0")['textContent'], error: {"type":"object","subtype":"error","className":"TypeError","description":"TypeError: Cannot read property 'textContent' of null\n    at <anonymous>:1:53","objectId":"{\"injectedScriptId\":3,\"id\":3}"}

HTML 代码片段在这里：

<vaadin-text-field class="standardformfield" id="runsetup" tabindex="0" required has-label has-helper has-value invalid has-error-message>
#shadow-root (open)
<div class="vaadin-text-field-container">

      <label part="label" id="vaadin-text-field-label-0">Run Name</label>

      <div part="input-field" id="vaadin-text-field-input-0">

        <slot name="prefix"></slot>

        <slot name="input">
          <input part="value" tabindex="0" aria-labelledby="vaadin-text-field-label-0 vaadin-text-field-input-0" placeholder="Type here..." required="" aria-describedby="vaadin-text-field-helper-0 vaadin-text-field-error-0" invalid="" aria-invalid="true">
        </slot>

        <div part="clear-button" id="clearButton" role="button" aria-label="Clear" hidden="true"></div>
        <slot name="suffix"></slot>

      </div>

      <div part="helper-text" id="vaadin-text-field-helper-0">
        <slot name="helper">No special characters, 255 characters max</slot>
      </div>

      <div part="error-message" aria-live="assertive" aria-hidden="false" id="vaadin-text-field-error-0">255 characters max</div>

    </div>

</vaadin-text-field>

有人可以调查一下并指出我做错了什么吗？谢谢，桑迪

Answer 1

如果此答案没有回答您的问题：

请遵循此流程，以便我们将来可以（以通用方式）添加对此的支持：https://github.com/intuit/karate/tree/develop/examples/ui-test

对于其中的一些事情，我们确实需要社区的帮助，请考虑一下。

ShadowRoot dom 空手道中的元素访问问题 UI

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