java.lang.AsserTionError:发现的值表示为null



我想检查文本字段值是否与我在代码上提到的预期值相同

这是我需要值

文本字段

input type =" text" value =" sadas" class =" mdl-textfield__input" id =" last_name" name =" last_name" lastholder =" enter姓

错误我得到的

testng错误消息如下显示, java.lang.assertionerror:预期[6234],但找到[] 而且没有为控制台印刷

我已经尝试了" assert.asserttrue(lastName.equals(" lastName:6234")));太

@Test
    public void tc001() {       
    driver.get(baseUrl);
    driver.findElement(By.xpath("//input[@name='email']")).click();
    driver.findElement(By.xpath("//input[@name='email']")).clear(); driver.findElement(By.xpath("//input[@name='email']")).sendKeys("x@gmail.com");
    driver.findElement(By.xpath("//input[@name='password']")).clear();driver.findElement(By.xpath("//input[@name='password']")).sendKeys("123456");
    driver.findElement(By.xpath("(.//*[normalize-space(text()) and  normalize-space(.)='Forgot Your Password?']) [1]/preceding::button[1]")).click();
    driver.findElement(By.linkText("Nadee")).click();
    driver.findElement(By.linkText("Profile")).click();
    String lastName = driver.findElement(By.xpath("//input[@name='last_name']")).getText();
    Assert.assertEquals(lastName ,"6234");
    System.out.println(lastName);   
    driver.findElement(By.linkText("Log Out")).click();
    }

我该如何解决?为什么当预期值相同时我会遇到此错误?(手动检查系统时)

尝试添加等待,然后才能获得姓氏字段的值。您是在获得姓氏之前单击链接,可能没有满载页面。

driver.findElement(By.linkText("Profile")).click();
WebDriverWait wait = new WebDriverWait(driver, 10);
wait.until(ExpectedConditions.visibilityOfElementLocated(By.xpath("//input[@name='last_name']")));
String lastName = driver.findElement(By.xpath("//input[@name='last_name']")).getAttribute("value");
system.out.println("Last Name value is: "+ lastName); // check the output on console too
Assert.assertEquals(lastName ,"6234");

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