Prezentacja z VI edycji Quality Excites. Podczas swojego wystąpienia Tomasz przybliżył uczestnikom wzorzec Screenplay Pattern, który określany jest przez autorów mianem następcy Page Objects. Jednym z głównych założeń Screenplay Pattern jest projektowanie zorientowane na użytkownika, dzięki czemu testy przyjmują formę języka naturalnego, co ma wspomagać szybsze tworzenie i łatwiejsze utrzymanie przypadków testowych.

3. public class LoginPage
{
private By username = By.Id("username"); [...]
public void SetUsername(string username) { [...] }
public HomePage Login(string username, string password) { [...] }
}

4. SchedulerPage.java
(243 LOC)

5. ACTOR
ABILITIES INTERACTIONS
TASKS
QUESTIONS
ELEMENTS SCREENon aperforms
enable
has
made up
of

6. public void UserIsAbleToFilterTheList( )
{
Actor james = Actor.Named("James");
james.Can(BrowseTheWeb.With(ChromeBrowser));
james.AttemptsTo(
Start.WithAnEmptyToDoList( ),
AddATodoItem.Called("Buy some milk"),
FilterItems.ToShow("Active")
);
james.Should(seeThat(TheItems.Displayed( ), contains(("Buy some milk")));
}

8. ACTOR
ABILITIES INTERACTIONS
TASKS
QUESTIONS
ELEMENTS SCREENon aperforms
enable
has
made up
of

9. Actor monica = Actor.Named("Monica"); // Monica, Moderator
Actor adam = Actor.Named("Adam"); // Adam, Administrator
Adam ≠ I

10. public class Actor
{
public static Actor Named(string name) { [...] }
public Actor Can(IAbility doSomething) { [...] }
public ABILITY AbilityTo<ABILITY>( ) { [...] }
public void AttemptsTo(params IPerformable[ ] tasks) { [...] }
}

12. ACTOR
ABILITIES INTERACTIONS
TASKS
QUESTIONS
ELEMENTS SCREENon aperforms
enable
has
made up
of

13. public class BrowseTheWeb : IAbility
{
private IWebDriver driver;
public static BrowseTheWeb With(Browser browser)
{
return new BrowseTheWeb(browser);
}
public IWebDriver Driver => driver;
}

15. ACTOR
ABILITIES INTERACTIONS
TASKS
QUESTIONS
ELEMENTS SCREENon aperforms
enable
has
made up
of

16. Task
IPerformable
Interaction
public interface IPerformable
{
void PerformAs(Actor actor);
}

17. Goal • Why?
Tasks • What?
Interactions
• How
?

18. Scenario: Adding an item to an empty list
Given that James has an empty todo list
When he adds 'Buy some milk' to his list
Then 'Buy some milk' should be recorded in his list
public void adds_Buy_some_milk_to_his_list(string item)
{
actor.AttemptsTo(AddATodoItem.Called(item));
}

19. public class AddATodoItem : Task
{
private string thingToDo;
public static AddATodoItem Called(string thingToDo)
{
return new AddATodoItem(thingToDo);
}
public void PerformAs(Actor actor)
{
actor.AttemptsTo(Enter.TheValue(thingToDo).Into(WHAT_NEEDS_TO_BE_DONE));
}
}

20. public class Enter
{
private string theText;
public static Enter TheValue(string text)
{
return new Enter(text);
}
public EnterValue Into(By by)
{
return new EnterValue(theText, by);
}
}

21. public class EnterValue : Interaction
{
private string theText;
private By by;
public void PerformAs(Actor actor)
{
var driver = actor.AbilityTo<BrowseTheWeb>( ).Driver;
driver.FindElement(by).SendKeys(theText);
}
}

22. public void AttemptsTo(params IPerformable[ ] tasks)
{
foreach(IPerformable task in tasks)
{
task.PerformAs(this);
}
}

24. ACTOR
ABILITIES INTERACTIONS
TASKS
QUESTIONS
ELEMENTS SCREENon aperforms
enable
has
made up
of

25. public interface IQuestion<ANSWER>
{
ANSWER AnsweredBy(Actor actor);
}
public class Selected : Question<string>
{
public static Selected Filter( ) { return new Selected( ); }
public string AnsweredBy(Actor actor) { […] }
}

26. public class Actor
{
public ANSWER AsksFor<ANSWER>(IQuestion<ANSWER> question)
{
return question.AnsweredBy(this);
}
}
string filter = actor.AsksFor(Selected.Filter( ));

28. ACTOR
ABILITIES INTERACTIONS
TASKS
QUESTIONS
ELEMENTS SCREENon aperforms
enable
has
made up
of

29. public class TodoList
{
public static By WHAT_NEEDS_TO_BE_DONE = By.CssSelector("#new-todo");
public static By CLEAR_COMPLETED = By.CssSelector("#clear-completed");
}

30. public void UserIsAbleToFilterTheList( )
{
Actor james = Actor.Named("James");
james.Can(BrowseTheWeb.With(ChromeBrowser));
james.AttemptsTo(
Start.WithAnEmptyToDoList( ),
AddATodoItem.Called("Buy some milk"),
FilterItems.ToShow("Active")
);
james.Should(seeThat(TheItems.Displayed( ), contains(("Buy some milk")));
}

31.  Beyond Page Objects: Next Generation Test Automation with
Serenity and the Screenplay Pattern
(https://www.infoq.com/articles/Beyond-Page-Objects-Test-Automation-Serenity-Screenplay)
 Serenity/JS
(http://serenity-js.org/)
 Serenity BDD
(https://github.com/serenity-bdd)

32. www.future-processing.pl