In the modern application development process, testing is not only an addition. A great example of a proper testing suite revolution is Behat system from the open-source eCommerce project Sylius, which has been entirely rebuilt some time ago. I will present the bigges problems which we had in previous UI tests and the conclusions we’ve deduced from them. I will also show the way, how we’ve rewritten the test system and what we learned from it.

1. BDD REVOLUTION
OR HOW WE CAME BACK FROM HELL
@mpzalewski
Zales0123
MATEUSZ ZALEWSKI

2. @mpzalewski
Zales0123
mpzalewski.com
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4. BEHAVIOUR DRIVEN
DEVELOPMENT
BDD is a process designed to aid the management and the delivery of
software development projects by improving communication between
engineers and business professionals.
https://inviqa.com/insights/bdd-guide
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6. Given "PHP T-Shirt" is priced at €100.00
And the store has "VAT" tax rate of 23%
When I add product "PHP T-Shirt" to the cart
Then my cart taxes should be €23.00
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7. /**
* @Given :product is priced at :price
*/
public function productIsPricedAt(ProductInterface $product, int $price): void
{
$product->setPrice($price);
}
/**
* @Then /^(my cart) taxes should be ("[^"]+")$/
*/
public function myCartTaxesShouldBe(CartInterface $cart, int $money): void
{
Assert::eq($cart->getTaxesTotal(), $money);
}
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8. LESS AMBIGUITY
=
LESS MISUNDERSTANDINGS
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9. 9
Translation of
requirements
$$$
Poor
communication

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17. https://www.theverge.com/2016/5/5/11592622/this-is-
fi
ne-meme-comic
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19. @ui
Given "PHP T-Shirt" is priced at €100.00
And the store has "VAT" tax rate of 23%
When I add product "PHP T-Shirt" to the cart
Then my cart taxes should be €23.00
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20. SCENARIO CONTEXT
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21. SCENARIO CONTEXT
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22. 22
EXTENSIONS
TRANSFORMERS
SCENARIO CONTEXT PAGE
API
UI
Application

23. FRIENDS OF BEHAT
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26. GHERKIN STEP
PHP CODE
CONTEXT
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27. /**
* @When I choose :countryName
*/
public function iChoose(string $countryName): void
{
$this->createPage->chooseName($countryName);
}
/**
* @When I save my changes
* @When I try to save changes
*/
public function iSaveMyChanges(): void
{
$this->updatePage->saveChanges();
}
/**
* @Then I should not be able to choose :name
*/
public function iShouldNotBeAbleToChoose(string $name): void
{
try {
$this->createPage->chooseName($name);
} catch (ElementNotFoundException $exception) {
return;
}
throw new Exception(sprintf('I should not be able to choose "%s".', $name));
}
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28. VALUE
OBJECT
TRANSFORM
ER
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29. /**
* @Transform /^coupon "([^"]+)"$/
* @Transform /^"([^"]+)" coupon$/
* @Transform :coupon
*/
public function getCouponByCode(string $couponCode): CouponInterface
{
$coupon = $this->couponRepository->findOneBy(['code' => $couponCode]);
Assert::notNull(
$coupon,
sprintf('Coupon with code "%s" does not exist', $couponCode)
);
return $coupon;
}
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30. When I add this product to the cart
When I browse that channel
Then this item should have name "T-shirt banana"
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31. PHP CODE
API
UI CLI
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public function addToCartWithQuantity(string $quantity): void
{
$this->getElement('quantity')->setValue($quantity);
$this->getElement('add_to_cart_button’)->click();
}

33. 2020
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34. @ui @api
Given "PHP T-Shirt" is priced at €100.00
And the store has "VAT" tax rate of 23%
When I add product "PHP T-Shirt" to the cart
Then my cart taxes should be €23.00
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35. 35
SCENARIO CONTEXT PAGE
API
UI
Application

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SCENARIO
UI CONTEXT PAGE
UI
API CONTEXT CLIENT

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SCENARIO
UI CONTEXT PAGE
UI
API CONTEXT CLIENT
?

38. When I add 4 products "PHP T-Shirt" to the cart
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/**
* @When /^I add(?:|ed)(?:| again) (d+) (products "([^"]+)") to the cart$/
*/
public function iAddProductsToTheCart(int $quantity, ProductInterface $product)
{
$this->productShowPage->open(['slug' => $product->getSlug()]);
$this->productShowPage->addToCart();
}
/**
* @When /^I add(?:|ed)(?:| again) (d+) (products "([^"]+)") to the cart$/
*/
public function iAddProductsToTheCart(int $quantity, ProductInterface $product)
{
// ...
$this->shopClient->executeCustomRequest($request);
}
@ui
@api

39. curl -X 'POST'
'https://demo.sylius.com/api/v2/shop/orders/4tRzg1O1eH/items'
-H 'accept: application/ld+json'
-H 'Content-Type: application/ld+json'
-d '{
"productVariant": "/api/v2/shop/product-variants/Everyday_white_basic_T_Shirt-variant-0",
"quantity": 1
}'

40. !
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41. 2077
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45. @ui @api @smell
Given "PHP T-Shirt" is priced at €100.00
And the store has "VAT" tax rate of 23%
When I add product "PHP T-Shirt" to the cart
Then my cart taxes should be €23.00
45

46. @ui @api @cli @application @domain...
Given "PHP T-Shirt" is priced at €100.00
And the store has "VAT" tax rate of 23%
When I add product "PHP T-Shirt" to the cart
Then my cart taxes should be €23.00
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47. BUSINESS VALUE
CODE VALUE
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48. Have no fear of perfection - you’ll never reach it.
~ Salvador Dali
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49. THANK YOU
QR CODE
@CommerceWeavers
@Sylius QR CODE
@mpzalewski Zales0123