WebDriver中執行JavaScript

首先要通過向下轉型 JavascriptExecutor js = (JavascriptExecutor) driver; 轉為JavascriptExector對象

然后再調用executeScript()方法來執行JS。

例：

1. 打開Google首頁

2. 通過JS獲取網頁中的title  --- document.title

3. 獲得網頁中鏈接的數量 ----var links = document.getElementsByTagName('A'); return links.length

具體實現如下

    package com.example.tests;  
    import static org.junit.Assert.*;  
    import org.junit.*;  
    import org.openqa.selenium.*;  
    import org.openqa.selenium.ie.InternetExplorerDriver;  

    public class test {  
        @Test  
        public void testJavaScriptCalls() {  
            WebDriver driver = new InternetExplorerDriver();  
            driver.get("http://www.google.com.hk");  
            JavascriptExecutor js = (JavascriptExecutor) driver;  
            String title = (String) js.executeScript("return document.title");  
            assertEquals("Google", title);  
            long links = (Long) js.executeScript("var links = "  
                    + "document.getElementsByTagName('A'); "  
                    + "return links.length");  
            assertEquals(32, links);  
            driver.close();  
        }  
    }