Scaladays 2014   introduction to scalatest selenium dsl
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Scaladays 2014 introduction to scalatest selenium dsl

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Selenium is a technology used to test web sites by firing up a browser and then interacting with a web site. It can be used from a number of languages - Java, Python, Ruby. Scalatest 2.0 introduced a ...

Selenium is a technology used to test web sites by firing up a browser and then interacting with a web site. It can be used from a number of languages - Java, Python, Ruby. Scalatest 2.0 introduced a DSL which simplifies the writing of tests in Selenium. More importantly, it simplifies the process of reading and understanding the tests. It becomes easier to walk through a test with a semi-technical person.

We present a introduction where we test an application with heavy use of Javascript using the DSL, along with advantages and disadvantages of the approach that we took. We also look to the future to see what could be done better.

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Scaladays 2014 introduction to scalatest selenium dsl Presentation Transcript

  • 1. SCALATEST SELENIUM DSL Scala days 2014 - Berlin
  • 2. MATTHEW FARWELL • Over 20 years development experience • Project Lead on Scalastyle, style checker for Scala http://www.scalastyle.org • Contributor to various open source projects, notably Scalatest, JUnit, Scala- IDE • Co-author with Josh Suereth of "sbt in Action" http://manning.com/suereth2/ • https://github.com/matthewfarwell/scaladays-2014-selenium
  • 3. GOALS • Present the Selenium DSL • Show how it simplifies the writing of selenium tests. • Show how it can be used to test a javascript heavy application • Show how it can be integrated with other tests to make more useful integration tests • The future, well what I would like anyway
  • 4. SELENIUM • Selenium automates browsers. • Firefox, Chrome, Internet Explorer, Safari, Opera, HtmlUnit • Selenium has interfaces for Java, Python, Ruby, etc. • We'll be looking at from the point of view of testing • But we could use it for other stuff – automation of administration for example.
  • 5. EXAMPLE (JAVA) final WebDriver driver = new FirefoxDriver(); Wait<WebDriver> wait = new WebDriverWait(driver, 30); driver.get("http://www.google.ch/"); driver.findElement(By.name("q")).sendKeys("Matthew Farwell"); driver.findElement(By.name("btnG")).click(); wait.until(new ExpectedCondition<Boolean>() { public Boolean apply(WebDriver webDriver) { return webDriver.findElement(By.id("resultStats")) != null; }}); boolean b = driver.findElement(By.tagName("body")) .getText().contains("farwell.co.uk"); System.out.println((found ? "You are famous" : "Not famous enough, sorry"));
  • 6. EXAMPLE (PYTHON) driver = webdriver.Firefox() driver.get("http://www.google.ch") elem = driver.find_element_by_name("q") elem.send_keys("Farwell") elem.send_keys(Keys.RETURN) assert "farwell.co.uk" in driver.find_by_element_id("body")
  • 7. EXAMPLE (SCALA) go to "http://www.google.ch/" textField("q").value = "Farwell" click on "btnG" eventually { val t = find(tagName("body")).get.text } t should include("farwell.co.uk") println("Yay, you are famous") - AmIFamousScala.scala
  • 8. OUR APPLICATION • https://github.com/matthewfarwell/scaladays-2014-selenium $ sbt > re-start - Run tests from Eclipse $ sbt > re-start > test
  • 9. A REAL TEST val baseUrl = "http://localhost:9100/" "slash" should "redirect to admin index.html" in { go to baseUrl currentUrl should be (baseUrl + "admin/index.html#/users") find("pageTitle").get.text should be("Users") textField("userSearch").value should be('empty) find("userUsername_2").get.text should be("matthew") } - UserSpec1.scala
  • 10. ADDING EVENTUALLY eventually { find("userUsername_2").get.text should be("matthew") } - UserSpec2.scala
  • 11. ADDING EVENTUALLY (2) eventually { find("pageTitle").get.text should be("Users") textField("userSearch").value should be('empty) find("userUsername_2").get.text should be("matthew") } - UserSpec2.scala
  • 12. GETTING / SETTING VALUES go to (baseUrl + "admin/index.html#/users") eventually { click on "userEdit_2" } eventually { val tf = textField("userFullname") tf.value should be("Matthew Farwell") tf.isEnabled should be (true) } textField("userFullname").value = "Matthew Farwell is great" - UserSpec3.scala
  • 13. GETTING / SETTING VALUES pwdField("password").value = "hello world" pwdField("confirmPassword").value = "hello world" find("error").get.text should be("Passwords do not match") - UserSpec3.scala
  • 14. DEBUGGING capture to "foo.png" println(currentUrl) println(pageSource) withScreenshot { // some stuff // if ModifiableMessage is thrown, screenshot is taken }
  • 15. DEBUGGING - REPORTERS event match { case e: TestFailed => { val name = e.testName web.captureTo(s"${name}.png") println(web.pageSource) } } - Common.scala
  • 16. OTHER INPUT TYPES • textField • pwdField • checkBox • radioButton • singleSel, multiSel • HTML5 - emailField, colorField, dateField, dateTimeField, dateTimeLocalField, monthField, numberField, rangeField, searchField, telField, timeField, urlField, weekField
  • 17. XPATH LOOKUPS "list" should "default to 10 items" in { go to (baseUrl + "admin/index.html#/users") eventually { val xp = "//tr//td[starts-with(@id, 'userUsername_')]" val tds = findAll(xpath(xp)).map(_.text).toList tds.size should be(10) } } - UserSpec5.scala
  • 18. PAGE OBJECT PATTERN class HomePage extends Page { val url = "localhost:9100/index.html" } val homePage = new HomePage go to homePage
  • 19. COOKIES add cookie ("cookie_name", "cookie_value") cookie("cookie_name").value should be ("cookie_value") delete cookie "cookie_name"
  • 20. ALERTS, FRAMES, WINDOWS switch to alert switch to frame(0) // switch by index switch to frame("name") // switch by name switch to window(windowHandle) switch to activeElement switch to defaultContent
  • 21. NAVIGATION goBack() goForward() reloadPage()
  • 22. JAVASCRIPT go to (host + "index.html") val result1 = executeScript("return document.title;") result1 should be ("Test Title") val result2 = executeScript("return 'Hello ' + arguments[0]", "ScalaTest") result2 should be ("Hello ScalaTest")
  • 23. INTEGRATION TESTING // create a new user click on "newUser" textField("username").value = "user" // etc. click on "submit" // how do we test that the user has been created? - UserSpec4.scala
  • 24. INTEGRATION • A lot of the time, we would like to assert something which isn't available through the HTML front end
  • 25. INTEGRATION TESTING eventually { val after = Services.listUsers().unmarshall after.size should be(before.size + 1) val u = after.find(_.username == "user").get u.fullName should be(Some("Mr. User")) u.id should not be (None) } - UserSpec4.scala
  • 26. MULTI-BROWSER TESTING abstract class UserSpecBase with Driver { // tests here } class UserSpecChrome extends UserSpecBase with Chrome class UserSpecFirefox extends UserSpecBase with Firefox class UserSpecSafari extends UserSpecBase with Safari - UserSpec6.scala
  • 27. OUR CONTEXT • Lots of legacy code, partially tested with selenium in Java / Python. • Lots of new code, which has been tested with Scalatest selenium DSL • A simple click on a web page can have effects way beyond CRUD • Selenium used for testing pure HTML, GWT, Angular JS applications
  • 28. OUR EXPERIENCE • DSL is good for walking through a test – clearer and more readable than the Java equivalent • We have tests written by "developers" and "testers" • Consistent tests – we use Scalatest for unit tests, UI tests and integration tests. • Selenium DSL is integrated into Scalatest • Always have ids on elements • Our integration tests work with heterogeneous actions in the same test: • we can perform an action in the Browser, • then check call rest service, • then check the database, • call a command via ssh on a remote machine.
  • 29. WHAT WE'D LIKE TO IMPROVE IMPLICIT EVENTUALLY eventually { click on "userEdit_2" } eventually { textField("foo").get.value should be ("bar") } eventually { click on "btn" } eventually { textField("baz").get.value should be ("flobble") }
  • 30. WHAT WE'D LIKE TO IMPROVE SLOWING DOWN eventually { click on "userEdit_2" } eventually { textField("foo").get.value should be ("bar") } eventually { click on "userEdit_2" } eventually { textField("foo").get.value should be ("bar") }
  • 31. ME AGAIN • Matthew Farwell • Twitter: @matthewfarwell • Blog: http://randomallsorts.blogspot.ch/ • Scalastyle: http://www.scalastyle.org • sbt in Action: http://manning.com/suereth2