问题描述
我正在关注Michael Hartl的Ruby on Rails教程。当我使用rspec / capybara时，fill_in方法使我感到困惑。我有以下查看代码：
I am following Michael Hartl's Ruby on Rails Tutorial. When I use rspec/capybara, the fill_in method makes me confused. I have the following view code:
<%= f.label :name %>
<%= f.text_field :name %>
这是我的测试代码：
fill_in "Name", with: "Example User"
它似乎fill_in定位输入字段都需要label和text_field。如果我摘下 f.label 或将<％= f.text_field：name％> 更改为<％= f.text_field：another_name％> ，测试将给我 ElementNotFound 错误。有人可以在这里解释fill_in的工作方式吗？ fill_in 方法是否需要输入字段和标签？
It seems that label and text_field are both required for fill_in to locate the input field. If I either take off f.label or change <%= f.text_field :name %> to be <%= f.text_field :another_name %>, the test will give me ElementNotFound error. Can anyone explain how the fill_in works here? Are input field and label both required for fill_in method?
推荐答案
它被表示 fill_in 查找字段 name ， id 或标签文本。根据Rails指南的部分，查看您要查询的代码应转换为以下html代码：
It is stated that fill_in looks for field name, id or label text. According to ActionView::Helpers::FormHelper section of rails guides, the view code which you ask about should be translated to the following html code:
# I assume that you made a form for a @user object
<label for="user_name">
Name
</label>
<input id="user_name" name="user[name]" type="text" />
如您所见，标签产生了名称文本，您可以在 fill_in 表达式中要求输入。但是 input 字段的 id 和 name 属性稍有不同，因此您应该一直使用基于 id 的选择器来达到相同的结果：
As you see, label produced the "Name" text, which you ask for inside of your fill_in expression. But id and name properties of input field are slightly different, so you should have been using id based selector to achieve the same result:
fill_in user_name，加上：'示例用户'
总而言之，标签字段不是必需的，但是您应该仔细查看html代码，并为 fill_in 表达式选择适当的参数。
So, to sum up, label field is not required, but you should watch for your html code carefully and select the appropriate parameters for fill_in expression.
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