和我一起学 Selenium WebDriver(4)——基础篇
【1、如何处理异步加载】
对于异步加载的捕获,其实就是一个等待的过程,这在之前的例子中早已看过,只不过需要特别说明一下 WebDriverWait,当超时后就会抛出异常,所以如果你的测试中对于这个部分不需要抛出异常的话,那么最好用 try catch 包起来。
这次利用 zTree 异步加载的Demo做测试,同时分别利用 WebElement 的 click 方法 和 zTree 的 expandNode 方法展开节点,进行异步加载。使用起来并不困难,直接看代码即可。
package lesson4; import static org.junit.Assert.*; import org.junit.AfterClass; import org.junit.BeforeClass; import org.junit.Test; import org.openqa.selenium.JavascriptExecutor; import org.openqa.selenium.WebDriver; import org.openqa.selenium.WebElement; import org.openqa.selenium.firefox.FirefoxDriver; import org.openqa.selenium.support.ui.ExpectedCondition; import org.openqa.selenium.support.ui.WebDriverWait; public class ExampleForAjax { static WebDriver driver; @BeforeClass public static void init() { System.out.println("init..."); // 如果你的 FireFox 没有安装在默认目录,那么必须在程序中设置 System.setProperty("webdriver.firefox.bin", "D:\\Program Files\\Mozilla Firefox\\firefox.exe"); // 创建一个 FireFox 的浏览器实例 driver = new FirefoxDriver(); } @Test public void test() { // 让浏览器访问 zTree Demo driver.get("http://www.ztree.me/v3/demo/cn/core/async.html"); // 等待 zTree 初始化完毕,Timeout 设置10秒 try { (new WebDriverWait(driver, 10, 500)).until(new ExpectedCondition<Boolean>() { public Boolean apply(WebDriver d) { WebElement element = (WebElement) ((JavascriptExecutor)driver).executeScript("return $('#treeDemo li').get(0);"); return element != null; } }); } catch(Exception e) { e.printStackTrace(); } ((JavascriptExecutor)driver).executeScript("window.zTreeObj = $.fn.zTree.getZTreeObj('treeDemo');"); //判断节点总数 Long count =(Long) ((JavascriptExecutor)driver).executeScript("return window.zTreeObj.transformToArray(window.zTreeObj.getNodes()).length;"); assertTrue(count == 4); //利用 expandNode 方法展开第一个父节点 ((JavascriptExecutor)driver).executeScript("window.zTreeNode = window.zTreeObj.getNodeByParam('isParent', true); window.zTreeObj.expandNode(window.zTreeNode, true);"); try { (new WebDriverWait(driver, 10, 500)).until(new ExpectedCondition<Boolean>() { public Boolean apply(WebDriver d) { Boolean isAjaxing = (Boolean) ((JavascriptExecutor)driver).executeScript("return !!window.zTreeNode.isAjaxing;"); return !isAjaxing; } }); } catch(Exception e) { e.printStackTrace(); } //判断节点总数 count =(Long) ((JavascriptExecutor)driver).executeScript("return window.zTreeObj.transformToArray(window.zTreeObj.getNodes()).length;"); assertTrue(count == 8); //模拟 click 事件 单击节点 +/- 号展开 WebElement element = (WebElement) ((JavascriptExecutor)driver).executeScript("window.zTreeNode = window.zTreeNode.children[0]; return $('#' + window.zTreeNode.tId + '_switch').get(0);"); element.click(); // 展开第一个子节点 ((JavascriptExecutor)driver).executeScript("window.zTreeObj.expandNode(window.zTreeNode, true);"); try { (new WebDriverWait(driver, 10, 500)).until(new ExpectedCondition<Boolean>() { public Boolean apply(WebDriver d) { Boolean isAjaxing = (Boolean) ((JavascriptExecutor)driver).executeScript("return !!window.zTreeNode.isAjaxing;"); return !isAjaxing; } }); } catch(Exception e) { e.printStackTrace(); } //判断节点总数 count =(Long) ((JavascriptExecutor)driver).executeScript("return window.zTreeObj.transformToArray(window.zTreeObj.getNodes()).length;"); assertTrue(count == 12); } @AfterClass public static void destory() { System.out.println("destory..."); //关闭浏览器 driver.quit(); } }
【2、如何监控 iframe】
能够正常监控 异步加载后,对于 iframe 就只剩下一个问题了,如何用 在父窗口执行iframe 窗口内的 js 了。
对于这个问题其实很简单, iframe 的 name 就是iframe 这个window 的对象,所以,你只需要注意把之前的window 换成 iframe 的name 就可以了;同时调用全局变量时也一定要加上这个iframe 的name
package lesson4; import org.junit.AfterClass; import org.junit.BeforeClass; import org.junit.Test; import org.openqa.selenium.JavascriptExecutor; import org.openqa.selenium.WebDriver; import org.openqa.selenium.firefox.FirefoxDriver; import org.openqa.selenium.support.ui.ExpectedCondition; import org.openqa.selenium.support.ui.WebDriverWait; public class ExampleForIframe { static WebDriver driver; @BeforeClass public static void init() { System.out.println("init..."); // 如果你的 FireFox 没有安装在默认目录,那么必须在程序中设置 System.setProperty("webdriver.firefox.bin", "D:\\Program Files\\Mozilla Firefox\\firefox.exe"); // 创建一个 FireFox 的浏览器实例 driver = new FirefoxDriver(); } @Test public void test() { // 让浏览器访问 zTree Demo driver.get("http://www.ztree.me/v3/demo.php#_102"); // 等待 iframe 加载完毕,Timeout 设置10秒 try { (new WebDriverWait(driver, 10, 500)).until(new ExpectedCondition<Boolean>() { public Boolean apply(WebDriver d) { Boolean loaded = (Boolean) ((JavascriptExecutor)driver).executeScript("return !!demoIframe.$.fn.zTree.getZTreeObj('treeDemo');"); return loaded; } }); } catch(Exception e) { e.printStackTrace(); } ((JavascriptExecutor)driver).executeScript("demoIframe.zTreeObj = demoIframe.$.fn.zTree.getZTreeObj('treeDemo');"); //利用 expandNode 方法展开第2个根节点 ((JavascriptExecutor)driver).executeScript("demoIframe.zTreeNode = demoIframe.zTreeObj.getNodes()[1]; demoIframe.zTreeObj.expandNode(demoIframe.zTreeNode, true);"); // 等待 5 秒 try { (new WebDriverWait(driver, 5, 1000)).until(new ExpectedCondition<Boolean>() { public Boolean apply(WebDriver d) { return false; } }); } catch(Exception e) {} } @AfterClass public static void destory() { System.out.println("destory..."); //关闭浏览器 driver.quit(); } }
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