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Behavior Driven
Web UI Automation
with Selenium and
Cucumber/SpecFlow
Agile Testing Days 2017, Potsdam
16th November, 2017
Gáspár Nagy
coach • trainer • bdd addict • creator of specflow
“The BDD Books: Discovery” • http://bddbooks.com
@gasparnagy • gaspar@specsolutions.eu
Copyright © Gaspar NagyCopyright © Gaspar Nagy
bdd addict
given.when.then
CAUTION!
on the stage
Gáspár Nagy
coach, trainer and bdd addict
creator of SpecFlow
gaspar@specsolutions.eu
https://specsolutions.eu
@gasparnagy
Copyright © Gaspar NagyCopyright © Gaspar Nagy
There are problems with UI test automation!
script
expressed using
UI terms
modeling gap
between UI terms and
domain model terms
sloooow
for a bigger app the
feedback loop gets
uselessly long
brittle
browsers changing,
environment changes,
cross-platform issues,
etc.
Copyright © Gaspar NagyCopyright © Gaspar Nagy
You are here*!
*hopefully
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Unclear
purpose
Code
duplication
Anti-
semantic
locators
Wrong
abstraction
Timing
issues
Behavior Driven UI Automation (Agile Testing Days 2017, Potsdam)
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Unclear
purpose
Code
duplication
Anti-
semantic
locators
Wrong
abstraction
Timing
issues
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Unclear purpose – What does it do?
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Introduce BDD (SpecFlow/Cucumber)
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Unclear
purpose
Code
duplication
Anti-
semantic
locators
Wrong
abstraction
Timing
issues
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Introduce Page Objects
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Introduce Page Objects
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Introduce Page Objects
Encapsulate interactions
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Unclear
purpose
Code
duplication
Anti-
semantic
locators
Wrong
abstraction
Timing
issues
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Anti-semantic locators
• Think about how your users identify the different information (text, data,
controls, buttons, etc.) on the page
• If the user can find them, you will also find them… be smart!
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Locating by ID is not enough!
[FindsBy(How = How.Id, Using = "cb9eb8be-71…")]
public IWebElement Khaki { get; set; }
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Do not expose internals in the locators!
[FindsBy(How = How.Id, Using = "fabric_input")]
public IWebElement Fabric { get; set; }
fabric
fabric_input
fabric_list
fabric_open
@Html.Kendo().ComboBox().Name("fabric")
These are
internal for
the control!
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Contextual semantics
[FindsBy(How = How.CssSelector, Using = "input.btn.btn-default")]
public IWebElement SubmitButton { get; set; }
The page may contain multiple forms later!
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Define your own location strategy and
implement it as a custom locator!
[FindsBy(How = How.Custom,
CustomFinderType = typeof(TableFieldLocator)]
public IWebElement UserName { get; set; }
form
This is a
generic lookup
strategy
User Name
Password
input
input
Copyright © Gaspar NagyCopyright © Gaspar Nagy
public IWebElement UserName { get; set; }
Apply conventions with decorators and find the
tester’s nirvana…
form
This is the app-
specific lookup
strategy
User Name
Password
input
input
Behavior Driven UI Automation (Agile Testing Days 2017, Potsdam)
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Unclear
purpose
Code
duplication
Anti-
semantic
locators
Wrong
abstraction
Timing
issues
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Wrong abstraction
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Concept is an idea or mental picture of a group or
class of objects formed by combining all their aspects
This
gonna
save it!
Copyright © Gaspar NagyCopyright © Gaspar Nagy
UI Concepts
Counter concept,
divs and spans
Short-text entering
concept, input
@type=text
Multi-line text
entering concept,
div+javascriptSingle-choice concept,
set of input
@type=radio Submit concept,
span+javascript
Copyright © Gaspar NagyCopyright © Gaspar Nagy
A concept-based page
express concepts
interact on concept
level
For ConceptFactory implementation see:
https://github.com/gasparnagy/Sample_BehaviorDrivenWebUIAutomation
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Unclear
purpose
Code
duplication
Anti-
semantic
locators
Wrong
abstraction
Timing
issues
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Thread.Sleep(3000);
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Why do we have this timing problem?
Copyright © Gaspar NagyCopyright © Gaspar Nagy
An example
Enter text
Post form
Working, working…
Observe result
title.SendKeys(…);
button.Click();
driver.FindElement(…);
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Let’s add some waiting to it!
Thread.Sleep(2000);
var wait = new WebDriverWait(driver, TimeSpan.FromSeconds(5));
wait.Until(d => d.FindElement(By...));
driver.Manage().Timeouts().ImplicitlyWait(TimeSpan.FromSeconds(5));
...
driver.FindElement(By...);
Static waiting
Busy/active waiting
Implicit busy waiting
Copyright © Gaspar NagyCopyright © Gaspar Nagy
An example
Enter text
Post form
Working, working…
Observe result
title.SendKeys(…);
button.Click();
driver.FindElement(…);
The thing you are waiting for is here!
You are waiting here!
Your user knows* when the action is done
*hopefully
• Maybe there is a progress indicator
• Maybe they look at the browser icon
• Maybe they’ll wait till they see the end of the page
Copyright © Gaspar NagyCopyright © Gaspar Nagy
An example
Enter text
Post form
Working, working…
Observe result
title.SendKeys(…);
button.Click();
...wait for the footer
driver.FindElement(…);
Result page loaded
button.SubmitClick()
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Other conditions
• Wait until progress indicator is unloaded
• Wait until injected JavaScript signals that the operation has finished
• Wait until protractor signals
• You can even put Thread.Sleep there… only to that single place!
For all these, you need to isolate Submit/Click from other clicks
Copyright © Gaspar NagyCopyright © Gaspar Nagy
Unclear
purpose
Code
duplication
Anti-
semantic
locators
Wrong
abstraction
Timing
issues
Behavior Driven UI Automation (Agile Testing Days 2017, Potsdam)
*maybe
Thank you!
Gáspár Nagy
coach • trainer • bdd addict • creator of specflow
“The BDD Books: Discovery” • http://bddbooks.com
@gasparnagy • gaspar@specsolutions.eu
Copyright © Gaspar NagyCopyright © Gaspar Nagy

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Behavior Driven UI Automation (Agile Testing Days 2017, Potsdam)

  • 1. Behavior Driven Web UI Automation with Selenium and Cucumber/SpecFlow Agile Testing Days 2017, Potsdam 16th November, 2017 Gáspár Nagy coach • trainer • bdd addict • creator of specflow “The BDD Books: Discovery” • http://bddbooks.com @gasparnagy • gaspar@specsolutions.eu
  • 2. Copyright © Gaspar NagyCopyright © Gaspar Nagy bdd addict given.when.then CAUTION! on the stage Gáspár Nagy coach, trainer and bdd addict creator of SpecFlow gaspar@specsolutions.eu https://specsolutions.eu @gasparnagy
  • 3. Copyright © Gaspar NagyCopyright © Gaspar Nagy There are problems with UI test automation! script expressed using UI terms modeling gap between UI terms and domain model terms sloooow for a bigger app the feedback loop gets uselessly long brittle browsers changing, environment changes, cross-platform issues, etc.
  • 4. Copyright © Gaspar NagyCopyright © Gaspar Nagy You are here*! *hopefully
  • 5. Copyright © Gaspar NagyCopyright © Gaspar Nagy
  • 6. Copyright © Gaspar NagyCopyright © Gaspar Nagy Unclear purpose Code duplication Anti- semantic locators Wrong abstraction Timing issues
  • 8. Copyright © Gaspar NagyCopyright © Gaspar Nagy Unclear purpose Code duplication Anti- semantic locators Wrong abstraction Timing issues
  • 9. Copyright © Gaspar NagyCopyright © Gaspar Nagy Unclear purpose – What does it do?
  • 10. Copyright © Gaspar NagyCopyright © Gaspar Nagy Introduce BDD (SpecFlow/Cucumber)
  • 11. Copyright © Gaspar NagyCopyright © Gaspar Nagy Unclear purpose Code duplication Anti- semantic locators Wrong abstraction Timing issues
  • 12. Copyright © Gaspar NagyCopyright © Gaspar Nagy Introduce Page Objects
  • 13. Copyright © Gaspar NagyCopyright © Gaspar Nagy Introduce Page Objects
  • 14. Copyright © Gaspar NagyCopyright © Gaspar Nagy Introduce Page Objects Encapsulate interactions
  • 15. Copyright © Gaspar NagyCopyright © Gaspar Nagy Unclear purpose Code duplication Anti- semantic locators Wrong abstraction Timing issues
  • 16. Copyright © Gaspar NagyCopyright © Gaspar Nagy
  • 17. Copyright © Gaspar NagyCopyright © Gaspar Nagy Anti-semantic locators • Think about how your users identify the different information (text, data, controls, buttons, etc.) on the page • If the user can find them, you will also find them… be smart!
  • 18. Copyright © Gaspar NagyCopyright © Gaspar Nagy Locating by ID is not enough! [FindsBy(How = How.Id, Using = "cb9eb8be-71…")] public IWebElement Khaki { get; set; }
  • 19. Copyright © Gaspar NagyCopyright © Gaspar Nagy Do not expose internals in the locators! [FindsBy(How = How.Id, Using = "fabric_input")] public IWebElement Fabric { get; set; } fabric fabric_input fabric_list fabric_open @Html.Kendo().ComboBox().Name("fabric") These are internal for the control!
  • 20. Copyright © Gaspar NagyCopyright © Gaspar Nagy Contextual semantics [FindsBy(How = How.CssSelector, Using = "input.btn.btn-default")] public IWebElement SubmitButton { get; set; } The page may contain multiple forms later!
  • 21. Copyright © Gaspar NagyCopyright © Gaspar Nagy Define your own location strategy and implement it as a custom locator! [FindsBy(How = How.Custom, CustomFinderType = typeof(TableFieldLocator)] public IWebElement UserName { get; set; } form This is a generic lookup strategy User Name Password input input
  • 22. Copyright © Gaspar NagyCopyright © Gaspar Nagy public IWebElement UserName { get; set; } Apply conventions with decorators and find the tester’s nirvana… form This is the app- specific lookup strategy User Name Password input input
  • 24. Copyright © Gaspar NagyCopyright © Gaspar Nagy Unclear purpose Code duplication Anti- semantic locators Wrong abstraction Timing issues
  • 25. Copyright © Gaspar NagyCopyright © Gaspar Nagy Wrong abstraction
  • 26. Copyright © Gaspar NagyCopyright © Gaspar Nagy Concept is an idea or mental picture of a group or class of objects formed by combining all their aspects
  • 28. Copyright © Gaspar NagyCopyright © Gaspar Nagy UI Concepts Counter concept, divs and spans Short-text entering concept, input @type=text Multi-line text entering concept, div+javascriptSingle-choice concept, set of input @type=radio Submit concept, span+javascript
  • 29. Copyright © Gaspar NagyCopyright © Gaspar Nagy A concept-based page express concepts interact on concept level For ConceptFactory implementation see: https://github.com/gasparnagy/Sample_BehaviorDrivenWebUIAutomation
  • 30. Copyright © Gaspar NagyCopyright © Gaspar Nagy Unclear purpose Code duplication Anti- semantic locators Wrong abstraction Timing issues
  • 31. Copyright © Gaspar NagyCopyright © Gaspar Nagy Thread.Sleep(3000);
  • 32. Copyright © Gaspar NagyCopyright © Gaspar Nagy Why do we have this timing problem?
  • 33. Copyright © Gaspar NagyCopyright © Gaspar Nagy An example Enter text Post form Working, working… Observe result title.SendKeys(…); button.Click(); driver.FindElement(…);
  • 34. Copyright © Gaspar NagyCopyright © Gaspar Nagy Let’s add some waiting to it! Thread.Sleep(2000); var wait = new WebDriverWait(driver, TimeSpan.FromSeconds(5)); wait.Until(d => d.FindElement(By...)); driver.Manage().Timeouts().ImplicitlyWait(TimeSpan.FromSeconds(5)); ... driver.FindElement(By...); Static waiting Busy/active waiting Implicit busy waiting
  • 35. Copyright © Gaspar NagyCopyright © Gaspar Nagy An example Enter text Post form Working, working… Observe result title.SendKeys(…); button.Click(); driver.FindElement(…); The thing you are waiting for is here! You are waiting here!
  • 36. Your user knows* when the action is done *hopefully • Maybe there is a progress indicator • Maybe they look at the browser icon • Maybe they’ll wait till they see the end of the page
  • 37. Copyright © Gaspar NagyCopyright © Gaspar Nagy An example Enter text Post form Working, working… Observe result title.SendKeys(…); button.Click(); ...wait for the footer driver.FindElement(…); Result page loaded button.SubmitClick()
  • 38. Copyright © Gaspar NagyCopyright © Gaspar Nagy Other conditions • Wait until progress indicator is unloaded • Wait until injected JavaScript signals that the operation has finished • Wait until protractor signals • You can even put Thread.Sleep there… only to that single place! For all these, you need to isolate Submit/Click from other clicks
  • 39. Copyright © Gaspar NagyCopyright © Gaspar Nagy Unclear purpose Code duplication Anti- semantic locators Wrong abstraction Timing issues
  • 42. Thank you! Gáspár Nagy coach • trainer • bdd addict • creator of specflow “The BDD Books: Discovery” • http://bddbooks.com @gasparnagy • gaspar@specsolutions.eu
  • 43. Copyright © Gaspar NagyCopyright © Gaspar Nagy