WebDriver操作页面元素之单选按钮

package com.seleniumdemo.webdriver;

import static org.junit.Assert.*;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;

public class testRadioButton {
    
        WebDriver webdriver = new FirefoxDriver();
        
        @Before
        public void setup(){
            webdriver.get("http://www.w3school.com.cn/html/html_forms.asp");
        }
        @Test
    
        public void testRadioButton(){
            WebElement fRadioButton = webdriver.findElement(By.xpath(".//*[@id=‘maincontent‘]/div[5]/form[2]/input[2]"));
            
            if (! fRadioButton.isSelected()) {
                fRadioButton.click();
            }
            
            assertTrue(fRadioButton.isSelected());
            
        }
        
        @ After
        
        public void tearDown(){
            webdriver.quit();
        }
}