FluentWait 类型不是通用的；它不能用参数 <WebDriver> 参数化.通过 Selenium 和 Java 的 FluentWait 类错误 [英] The type FluentWait is not generic; it cannot be parameterized with arguments <WebDriver> error for FluentWait Class through Selenium and Java

问题描述

我正在使用 Selenium Standalone Server 3.0.1.我正在尝试将 Explicit Wait 添加到我的代码中，以便在元素变得可见时通过 xpath 检测该元素.为了获得一些 Java 帮助，我查找了 Selenium Standalone Server 3.0.1 的源代码，但找不到.我在 selenium-java-2.53.1 版本中找到了源代码.我下载了它并找到了 selenium-java-2.53.1-srcs 并添加到我的 Eclipse IDE 中.在 FluentWait 的帮助下，我只需将代码复制粘贴到我的 Eclipse IDE 中并更改变量名称.

I am working with Selenium Standalone Server 3.0.1. I am trying to add an Explicit Wait to my code to detect an element through xpath when the element becomes visible. In order to get some Java help I looked out for the source code for Selenium Standalone Server 3.0.1 but was unable to find it. I found the source code in selenium-java-2.53.1 release. I downloaded it and found selenium-java-2.53.1-srcs and added to my Eclipse IDE. From the help of FluentWait, I simply copy pasted the code in my Eclipse IDE and changed the variable names.

文档中的示例代码如下:

The sample code in documentation is like:

   // Waiting 30 seconds for an element to be present on the page, checking
   // for its presence once every 5 seconds.
    Wait<WebDriver> wait = new FluentWait<WebDriver>(driver)
       .withTimeout(30, SECONDS)
       .pollingEvery(5, SECONDS)
       .ignoring(NoSuchElementException.class);

    WebElement foo = wait.until(new Function<WebDriver, WebElement>() {
     public WebElement apply(WebDriver driver) {
       return driver.findElement(By.id("foo"));
      }
    });

但是当我实现这段代码时，只需复制粘贴即可:

But when I implement this code, simply copy pasting it:

       Wait<WebDriver> wait = new FluentWait<WebDriver>(driver)
           .withTimeout(30, TimeUnit.SECONDS)
           .pollingEvery(5, TimeUnit.SECONDS)
           .ignoring(NoSuchElementException.class);

       WebElement element = wait.until(new Function<WebDriver, WebElement>()        {
         public WebElement apply(WebDriver driver) {
           return driver.findElement(By.xpath("//p[text()='WebDriver']"));
         }
       });

我在 FluentWait 类上遇到错误，因为 FluentWait 类型不是通用的；它不能用参数参数化

I am getting an error on FluentWait Class as The type FluentWait is not generic; it cannot be parameterized with arguments <WebDriver>

这是我的进口清单:

    import java.util.concurrent.TimeUnit;
    import org.apache.log4j.Logger;
    import org.apache.log4j.PropertyConfigurator;
    import org.openqa.selenium.By;
    import org.openqa.selenium.NoSuchElementException;
    import org.openqa.selenium.WebDriver;
    import org.openqa.selenium.WebElement;
    import org.openqa.selenium.chrome.ChromeDriver;
    import org.openqa.selenium.support.ui.Wait;
    import com.google.common.base.Function;

有人可以帮我吗?

添加了 answer 关于 Selenium v​​3.11.0

推荐答案

您需要在下面的等待中指定预期条件是可以解决您问题的修改后的代码.

You need to specify expected condition inside the wait below is the modified code that could solve your problem.

代码:

import java.util.concurrent.TimeUnit;
import org.junit.Test;
import org.openqa.selenium.By;
import org.openqa.selenium.NoSuchElementException;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.FluentWait;
import org.openqa.selenium.support.ui.Wait;

public class DummyClass
{
    WebDriver driver;
    @Test
    public void test()
    {
        Wait<WebDriver> wait = new FluentWait<WebDriver>(driver)
            .withTimeout(30, TimeUnit.SECONDS)
            .pollingEvery(5, TimeUnit.SECONDS)
            .ignoring(NoSuchElementException.class);

        until(new Function<WebElement, Boolean>() 
        {
            public Boolean apply(WebElement element)
            {
                return element.getText().endsWith("04");
            }

            private void until(Function<WebElement, Boolean> function)
            {
                driver.findElement(By.linkText("Sample Post2"));
            }
        }
    }
}

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