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Today we will cover
1. When to automate?2. Static page testing3. Dynamic page testing
Introduction
Creating these automation tasks takes time and resources so make sure that:
• you need to support a high number of browsers• you need to do regression tests multiple times• you have a suitable test execution environment• you have a clear plan when and how to execute the tests
When to automate?
Automation makes sense if the test need to be repeated often!
Define to number of browsers that need testing in advance.
When to automate?
Which browsers need testing?
• How to install a Selenium Grid• Install ImageMagick for picture comparison
When to automate?
Requirements:
o Develop by using a known-good browsero Use Selenium to take a known-good screenshoto Use Selenium to take screenshots in all other browsers that need testingo Use ImageMagick to compare these screenshots for problemso Manually review the screenshot comparison for real problems
Static Page Testing
How to automate?
Static Page Testingpublic static void TestGoogleHomepage() { // Create a screenshot with a known good browser first IWebDriver chromeDriver = new RemoteWebDriver(TestParameter.SeleniumHubUrl, DesiredCapabilities.Chrome()); GetPageScreenshot(chromeDriver, Path.Combine(basePath, "chrome.png"));
// Create screenshots in the other browsers we need to support IWebDriver firefoxDriver = new RemoteWebDriver(TestParameter.SeleniumHubUrl, DesiredCapabilities.Firefox()); GetPageScreenshot(firefoxDriver, Path.Combine(basePath, "firefox.png"));
// Create screenshot comparison ScreenshotHelper.CreateComparison(Path.Combine(basePath, "chrome.png"), Path.Combine(basePath, "firefox.png"), Path.Combine(basePath, "firefox_compare.png")); }
private static void GetPageScreenshot(IWebDriver driver, string screenshotPath) { // Change to the correct resolution driver.Manage().Window.Size = new System.Drawing.Size(TestParameter.Width, TestParameter.Height);
// Open Homepage driver.Navigate().GoToUrl(TestUrl);
// Take Screenshot ScreenshotHelper.TakeScreenshot(driver, screenshotPath); driver.Quit(); }
Static Page Testing
Demo
o Develop by using a known-good browsero Use Selenium to automate all user interactiono Take screenshots between each user interaction stepo Use ImageMagick to compare these screenshots for problemso Manually review the screenshot comparison for real problems
Dynamic Page Testing
How to automate?
Dynamic Page Testingpublic static void TestGoogleHomepage() { // Create a screenshot with a known good browser first IWebDriver chromeDriver = new RemoteWebDriver(TestParameter.SeleniumHubUrl, DesiredCapabilities.Chrome()); GetPageScreenshot(chromeDriver, Path.Combine(basePath, "chrome.png"));
[…]
// Create screenshot comparison ScreenshotHelper.CreateComparison(Path.Combine(basePath, "chrome.png"), Path.Combine(basePath, "firefox.png"), Path.Combine(basePath, "firefox_compare.png")); }
private static void GetPageScreenshots(IWebDriver driver, string screenshotPath) { // Change to the correct resolution driver.Manage().Window.Size = new System.Drawing.Size(TestParameter.Width, TestParameter.Height);
// Open Homepage driver.Navigate().GoToUrl(TestUrl);
// Take Screenshot ScreenshotHelper.TakeScreenshot(driver, screenshotPath[0], isFirefox);
// Do more user actions & take more screenshots driver.Quit(); }
Dynamic Page Testing
Demo
TakeScreenshot();public static void TakeScreenshot(IWebDriver driver, string path) { IJavaScriptExecutor jsExecutor = (IJavaScriptExecutor)driver; ITakesScreenshot takesScreenshot = (ITakesScreenshot)driver;
// Generate Bitmap Image finalScreenshot = new Bitmap(TestParameter.Width, TestParameter.Height);
// Scroll to top jsExecutor.ExecuteScript("window.scrollTo(0,0);", new object[] { });
byte[] screenshot = takesScreenshot.GetScreenshot().AsByteArray;
using (MemoryStream stream = new MemoryStream(screenshot)) { Bitmap originalScreenshot = (Bitmap)Bitmap.FromStream(stream); Bitmap parsedScreenshot = ResizeBitmap(originalScreenshot, TestParameter.Width, TestParameter.Height);
parsedScreenshot.Save(path, ImageFormat.Png);
parsedScreenshot.Dispose(); originalScreenshot.Dispose(); } }
Questions?
Q & A
