java - Selenium 2 : something wrong with code “driver.findElement(By.name("username")). 发送 key ("");”

Question

我使用代码

driver.findElement(By.name("username")).sendKeys("name");
driver.findElement(By.name("password")).sendKeys("12345");

登录网站。有时可以，有时不行，给出的错误是

Exception in thread "main" org.openqa.selenium.NoSuchElementException: Unable to locate element: {"method":"name","selector":"username"}

问题是有时它会起作用。我应该使用 Byxpath() 吗？

Answer 1

您可以使用带有条件的 WebDriverWait 来等待元素:

public class MyTestClass{

    private static final int MAX_WAIT_TIME_SEC = 60;
    private WebDriverWait wait;
    [...]

    public void setField(String fieldname, String text){
        wait = new WebDriverWait(driver, MAX_WAIT_TIME_SEC);
        wait.until(new NameExpectedCondition(xpath));
        WebElement element = driver.findElement(By.name(fieldname));
        if(element != null){
            element.sendKeys(text);
        }
        [...]
    }

    public void foo()
}

名称预期条件:

import org.openqa.selenium.By;

public class NameExpectedCondition implements ExpectedCondition<Boolean> {

private String fieldName;

public NameExpectedCondition(String fieldName)
{
    this.fieldName= fieldName;
}

public Boolean apply(WebDriver d) {
    d.findElement(By.Name(fieldName));
    return Boolean.TRUE;
}

}

另请确保您正在正确的框架中搜索该元素。