硒webdriver选择元素 [英] selenium webdriver select element
问题描述
我的网站上有一个选择控件.我正在使用页面对象与页面进行交互.如果我愿意(在我的类下是前两行,在方法中是selectByValue
)
I have a select control on my site. I am using page objects to interact with the page. If I do (with the first 2 lines under my class and the selectByValue
in my method)
@FindBy(id="foo")
private Select foo;
foo.selectByValue("myValue");
它以空指针失败.我也尝试了不使用@FindBy
.
It fails with a null pointer. I also tried without the @FindBy
.
现在,如果我在我的方法中执行此操作,则一切正常,并选择正确的项
Now if I do this in my method it all works fine and selects the correct item
Select foo = new Select(sDriver.findElement(By.id("foo")));
foo.selectByValue("myValue");
以下是该控件的实际网页摘要(已编辑以保护无辜者)
Here is the actual web snippet for that control (edited to protect the innocent)
<select id="foo" name="service_name">
<option selected="selected" value="one">one</option>
<option value="two">two</option>
<option value="three">three</option>
</select>
让我说我可以解决我的问题,但我不明白为什么 normal 路径不起作用.
Let me say that I have a work around for my issue but I don't get why the "normal" path is not working.
推荐答案
那是因为Select
类具有以下构造函数:
Thats because the Select
class has this constructor:
Select(WebElement element)
请参见 Javadoc
因此,如果您执行以下操作:
So if you do something like this:
@FindBy(id="foo")
private WebElement wannabeSelect;
Select realSelect = new Select(wannabeSelect);
realSelect.selectByValue("myValue");
应该可以.
顺便说一句,在替代方法"中,我使用的方法与您相同,因为当我需要选择对象时,我不想投射新的WebElement对象.但是无论如何,
BTW, I am using the same approach as you in the "workaround" because I dont wanna cast new WebElement object when I need Select object. But anyways, the
sDriver.findElement(By.id("foo"));
返回WebElement
,所以这就是它起作用的原因.您也可以这样做:
returns WebElement
, so thats why its working. You can also do this:
WebElement wannabeSelect = sDriver.findElement(By.id("foo"));
Select foo = new Select(wannabeSelect);
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