《软件测试自动化之道》读书笔记 之 底层的Web UI 测试

《软件测试自动化之道》读书笔记 之 底层的Web UI 测试

2014-09-28

测试自动化程序的任务
待测程序
测试程序
启动IE并连接到这个实例
如何判断待测web程序完全加载到浏览器
操纵并检查IE Shell
操作待测Web页面上的HTML元素的值
验证Web页面上HTML元素
示例代码

测试自动化程序的任务

底层技术的核心是，通过直接调用mshtml.dll和shdocvw.dll库来访问并且操纵IE客户区域的HTML对象。

待测程序

新建一个网站“WebAUT”，删除原来的Default.aspx，创建一个新的Default.aspx。在其中添加3个Label控件、2个RadioButton控件、1个TextBox控件、1个Button控件和1个ListBox控件。

// Chapter 7 - Low-Level Web UI Testing
// Example Program: LowLevelUITest

using System;
using SHDocVw; // COM component = Microsoft Internet Controls. IE object
using mshtml;  // .NET component = Microsoft.mshtml. HTML interfaces
using System.Diagnostics; // Process
using System.Threading;   // Sleep()

namespace RunTest
{
class Class1
{
static AutoResetEvent documentComplete = new AutoResetEvent(false);

[STAThread]
static void Main(string[] args)
{
try
{
Console.WriteLine("\nStarting test run");

bool pass = true; // assume test run will pass

SHDocVw.InternetExplorer ie = null;
Console.WriteLine("\nLaunching an instance of IE");
Process p = Process.Start("iexplore.exe", "about:blank");
System.Threading.Thread.Sleep(2000);
if (p == null)
throw new Exception("Could not launch IE");
Console.WriteLine("Process handle = " + p.MainWindowHandle.ToString());

SHDocVw.ShellWindows allBrowsers = new SHDocVw.ShellWindows();
Console.WriteLine("Number active browsers = " + allBrowsers.Count);

if (allBrowsers.Count == 0)
throw new Exception("Cannot find IE");

Console.WriteLine("Attaching to IE");
int i = 0;

while (i < allBrowsers.Count && ie == null)
{
InternetExplorer e = (InternetExplorer)allBrowsers.Item(i);
if (e != null)
{
if (e.HWND == (int)p.MainWindowHandle)
ie = e;
}
++i;
}

if (ie == null)
throw new Exception("Failed to attach to IE");

ie.DocumentComplete += new DWebBrowserEvents2_DocumentCompleteEventHandler(ie_DocumentComplete);

Console.WriteLine("\nNavigating to the Web app");
object nil = new object();
ie.Navigate("http://localhost:30614/WebAUT/Default.aspx", ref nil, ref nil, ref nil, ref nil);

documentComplete.WaitOne();

Console.WriteLine("Setting IE to size 450x360");
ie.Width = 450;
ie.Height = 360;
Thread.Sleep(1000);

//if (ie.StatusText.IndexOf("Done") == -1)
//    Console.WriteLine("could not find 'Done' in status bar");
//else
//    Console.WriteLine("Find 'Done' in status bar");

HTMLDocument theDoc = (HTMLDocument)ie.Document;

Console.WriteLine("\nSelecting 'ID' radio button");
HTMLInputElement radioButton = (HTMLInputElement)theDoc.getElementById("RadioButtonList1_2");
radioButton.@checked = true;

Console.WriteLine("Setting text box to '2B'");
HTMLInputElement textBox = (HTMLInputElement)theDoc.getElementById("TextBox1");
Console.WriteLine("The textbox has type" + textBox.GetType().ToString());
textBox.value = "2B";

Console.WriteLine("Clicking search button");
HTMLInputElement butt = (HTMLInputElement)theDoc.getElementById("Button1");
butt.click();

documentComplete.WaitOne();

Console.WriteLine("Seek 'aloha' in <p>[2]");
Console.WriteLine("<p> type is:" + theDoc.getElementsByTagName("p").GetType().ToString());
HTMLParaElement paraElement = (HTMLParaElement)theDoc.getElementsByTagName("p").item(1, null);
if (paraElement.innerText.ToString().IndexOf("aloha") >= 0)
Console.WriteLine("Found target 'aloha'");
else
Console.WriteLine("Target string not found");

Console.WriteLine("Seek 'adios' in <div id='div2'>");
HTMLDivElement divElement = (HTMLDivElement)theDoc.getElementsByTagName("div").item("div2", null);
if (divElement.innerText.ToString().IndexOf("adios") >= 0)
Console.WriteLine("Found target 'adios'");
else
Console.WriteLine("Target string not found");

// non-HTML element
Console.WriteLine("Seeking 'Search Complete' in body");
HTMLBody body = (HTMLBody)theDoc.getElementsByTagName("body").item(0, null);
if (body.createTextRange().findText("Search Complete", 0, 4) == true)
{
Console.WriteLine("Found target string");
}
else
{
Console.WriteLine("*Target string not found*");
pass = false;
}

if (pass)
Console.WriteLine("\nTest result = Pass\n");
else
Console.WriteLine("\nTest result = *FAIL*\n");

Console.WriteLine("Closing IE in 4 seconds . . . ");
Thread.Sleep(4000);
ie.Quit();

}
catch (Exception ex)
{
Console.WriteLine("Fatal error: " + ex.Message);
Console.ReadLine();
}

} // Main()

private static void ie_DocumentComplete(object pDisp, ref object URL)
{
documentComplete.Set();
}

} // class Class1
} // ns RunTest

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