Watir截屏功能的实现

Step1.下载并安装Rmagick
Step2.下载并安装win32screenshot
Step3.编辑Win32Screenshot.rb
      1.

module Win32

        改为

module Win32Screenshot

      2.找到

USER32 = DL.dlopen("user32")     EnumWindows = USER32['EnumWindows', 'IPL']     GetWindowTextLength = USER32['GetWindowTextLengthA' ,'LI' ]     GetWindowText = USER32['GetWindowTextA', 'iLsL' ]

        下面加入

ShowWindow= USER32['ShowWindow', 'LIL' ]     BringWindowToTop=USER32['BringWindowToTop','LI']

       3.找到

SRCCOPY = 0xCC0020     GMEM_FIXED = 0     DIB_RGB_COLORS = 0

        下面加入

SW_SHOWMAXIMIZED = 3

       4.找到

def capture_hwnd(hwnd)       hScreenDC = getDC(hwnd)

         两行之间插入

ShowWindow.call(hwnd,SW_SHOWMAXIMIZED)       setForegroundWindow(hwnd)       BringWindowToTop.call(hwnd)

Step4.编辑Watir.rb
       1.文件开头加入

require 'win32screenshot' require 'rubygems' require 'RMagick'

       2.Class IE中加入方法

def captureGif(file)              width, height, bmp =Win32Screenshot::Screenshot.capture_hwnd(@ie.hwnd)       img = Magick::Image.from_blob(bmp)       png = img[0].to_blob do       self.format = 'gif'     end     File.open(file, "wb") {|io| io.write(png)} unless file.nil?     end

Step5.over用下面的代码试一下效果

require 'watir'   # the watir controller    # open the IE browser    ie = Watir::IE.new    ie.maximize    # Step 1: go to the test site: http://www.google.com    ie.goto("http://www.google.com")    ie.captureGif('c:/google1.gif')    # Step 2: enter 'pickaxe' in the search text field    ie.text_field(:name, "q").set("什么")       # q is the name of the search field    ie.captureGif('c:/google2.gif')    # Step 3: click the 'Google Search' button    ie.button(:name, "btnG").click                 # "btnG" is the name of the Search button    ie.captureGif('c:/google3.gif')    # Actual Result: Check that the 'Programming Ruby' link appears on the results page    if  ie.contains_text("什么是-什么是什么，搜搜就知道！")         puts "Test Passed. Found the test string: '什么是-什么是什么，搜搜就知道！'. Actual Results match Expected Results."    else       puts "Test Failed! Could not find: '什么是-什么是什么，搜搜就知道！'"    end    # End of test: Google search

原文转自：http://www.ltesting.net