Writing effective tests in Behat

Transcript

1. Writing effective tests with Behat
2. Who Am I? Iain Cambridge Software Engineer @ Inviqa Twitter: @ircambridge Email : iain@iain.sexy
3. BDD != TDD
4. Good Testing Practices
5. Don’t change tests
6. One Logic Assertion
7. One Event
8. Should be able to run in parallel
9. Stable
10. In Behat Examples are the key
11. The Three Kinds Of Steps The Setup Given
12. The Three Kinds Of Steps The Event When
13. The Three Kinds Of Steps The Assertion Then and But
14. Lets look at an example
15. Given I have a product called “Nokia Phone” with url slug “nokia-phone” for the price of “10” Given I have a phone called “Samsung Phone” which is recommend for “Nokia Phone” When I open “/products” When I click link “.product:contains(‘Nokia Phone’)” Then I should see “Nokia Phone” in h2 class “product- title” Then I should see price of £12 Then I should see “Samsung Phone”
16. Lets fix it!
17. Given I have a product called “Nokia Phone” with url slug “nokia-phone” for the price of “10”
18. Given I have a product called “Nokia Phone” with url slug “nokia-phone” for the price of “10” Given the following products exist: | Title | Price | Url Slug | | Nokia Phone | 10 | nokia-phone |
19. Given I have a phone called “Samsung Phone” which is recommend for “Nokia Phone”
20. Given I have a phone called “Samsung Phone” which is recommend for “Nokia Phone” Given the following products exist: | Title | Price | Url Slug | | Nokia Phone | 10 | nokia-phone | | Samsung Phone | 10 | samsung-phone | And “Samsung Phone” is recommended for “Nokia Phone”
21. When I open “/products”
22. When I open “/products” When I open the products listing page
23. When I click link “.product:contains(‘Nokia Phone’)”
24. When I click link “.product:contains(‘Nokia Phone’)” When I go to the product page for “Nokia Phone”
25. Then I should see “Nokia Phone” in h2 class “product-title”
26. Then I should see “Nokia Phone” in h2 class “product-title” Then I should see the product title as “Nokia Phone”
27. Then I should see price of £12
28. Then I should see price of £12 Then I should see a price that includes VAT of £12
29. Then I should see “Samsung Phone”
30. Then I should see “Samsung Phone” Then I should be recommended “Samsung Phone”
31. It’s all changed
32. Given I have a product called “Nokia Phone” with url slug “nokia-phone” for the price of “10” Given I have a phone called “Samsung Phone” which is recommend for “Nokia Phone” When I open “/products” When I click link “.product:contains(‘Nokia Phone’)” Then I should see “Nokia Phone” in h2 class “product- title” Then I should see price of £12 Then I should see “Samsung Phone”
33. Is now
34. Given the following products exist: | Title | Price | Url Slug | | Nokia Phone | 10 | nokia-phone | | Samsung Phone | 10 | samsung-phone | And “Samsung Phone” is recommended for “Nokia Phone” When I open the product listing page And I go to the product page for “Nokia Phone” Then I should see the product title as “Nokia Phone” And I should see a price that includes VAT of £12 And I should be recommended “Samsung Phone”
35. Given the following products exist: | Title | Price | Url Slug | | Nokia Phone | 10 | nokia-phone | | Samsung Phone | 10 | samsung-phone | And “Samsung Phone” is recommended for “Nokia Phone” When I open the product listing page And I go to the product page for “Nokia Phone” Then I should see the product title as “Nokia Phone” And I should see a price that includes VAT of £12 And I should be recommended “Samsung Phone”
36. Given the following products exist: | Title | Price | Url Slug | | Nokia Phone | 10 | nokia-phone | When I open the product listing page And I go to the product page for “Nokia Phone” Then I should see the product title as “Nokia Phone” And I should see a price that includes VAT of £12
37. Given the following products exist: | Title | Price | Url Slug | | Nokia Phone | 10 | nokia-phone | When I open the product listing page And I go to the product page for “Nokia Phone” Then I should see the product title as “Nokia Phone” And I should see a price that includes VAT of £12
38. Given the following products exist: | Title | Price | Url Slug | | Nokia Phone | 10 | nokia-phone | When I go to the product page for “Nokia Phone” Then I should see the product title as “Nokia Phone” And I should see a price that includes VAT of £12
39. Given the following products exist: | Title | Price | Url Slug | | Nokia Phone | 10 | nokia-phone | When I go to the product page for “Nokia Phone” Then I should see the product title as “Nokia Phone” And I should see a price that includes VAT of £12
40. Given the following products exist: | Title | Price | Url Slug | | Nokia Phone | 10 | nokia-phone | When I go to the product page for “Nokia Phone” Then I should see the product title as “Nokia Phone”
41. Given the following products exist: | Title | Price | Url Slug | | Nokia Phone | 10 | nokia-phone | When I go to the product page for “Nokia Phone” Then I should see the product title as “Nokia Phone”
42. Given the following products exist: | Title | Price | Url Slug | | Nokia Phone | 10 | nokia-phone | When I go to the product page for “Nokia Phone” Then I should see the product information for “Nokia Phone”
43. Some good practices for Contexts
44. Only do assertions in assertion steps
45. Split contexts up
46. Whens should be usable as Givens
47. Don’t have empty steps
48. Don’t rely on database state
49. Don’t use Raw Mink
50. PageObjects
51. <?php namespace Page; use SensioLabs\Behat\PageObjectExtension \PageObject\Page; class Login extends Page { public function enterUsername($username) { $this->fillField(‘username’, $username); } }
52. <?php // … class Login extends Page { protected $elements = [ ‘Login Button’ => [ ‘css’ => ‘.submit’], ]; }
53. <?php // … class Login extends Page { //… public function pressButton() { $field = $this->getElement(‘Login Button’); $field->click(); } }
54. <?php // … class LoginContext extends PageObjectContext { /** * @Given I am on the login page */ public function iAmOnTheLoginPage() { $loginPage = $this->getPage(‘login’); $loginPage->open(); } }
55. Questions?