BDD: Behind the Scenes
- 1. BDD: Behind the Scenes github: https://github.com/nazarii-piontko/ToDo-BDD
- 2. To be discussed ● What is BDD ● Building blocks: ○ Cucumber/Gherkin ○ Selenium ○ Docker ● Get everything together ● Example
- 3. What is BDD
- 4. Cucumber ● Executable Specifications. ● Runs automated acceptance tests. ● Software behaviors is specified in a logical language that customers can understand. ● Central to the Cucumber BDD approach is its plain language parser called Gherkin. ● Ruby, Java, Python, .NET, JavaScript, etc.
- 5. Gherkin Syntax Feature: Google Searching. As a web surfer, I want to search with Google. Scenario: Simple Google search Given a web browser is on the Google page When the search phrase "python" is entered And the search button pressed Then results for "python" are shown And the following results are shown |results | |Welcome to Python.org | |Python Tutorial - W3Schools|
- 6. Gherkin keywords ● Feature ● Scenario ● Given, When, Then, And, But ● Background ● Scenario Outline, Examples Scenario Outline: eating Given there are <start> cucumbers When I eat <eat> cucumbers Then I should have <left> cucumbers Examples: | start | eat | left | | 12 | 5 | 7 | | 20 | 5 | 15 |https://cucumber.io/docs/gherkin/reference/
- 7. Gherkin steps Given a web browser is on the Google page @given('a web browser is on the Google page') def browser_is_on_the_google_page(context): ... When the search phrase "python" is entered @when('the search phase "{query}" is entered') def search_phase_is_entered(context, query): ... Then results for "python" are shown @then('results for "{query}" are shown') def results_are_shown(context, query): assert ...
- 8. Environmental Control (Hooks) before_all for feature in all_features: before_feature for scenario in feature.scenarios: before_scenario for step in scenario.steps: before_step step.run() after_step after_scenario after_feature after_all def before_all(context): ... def before_feature(context, feature): ... def before_scenario(context, scenario): ... def before_step(context, step): ... def after_step(context, step): ... def after_scenario(context, scenario): ... def after_feature(context, feature): ... def after_all(context): ...
- 9. Selenium Real Browser Browser Drivers Firefox driver Chrome driver IE driver Communication Protocol over Network Selenium Language Bindings .NET Java Python ...
- 10. Docker
- 11. Docker version: '3.4' services: app: image: npiontko/sample-node-todo environment: - PGUSER=postgres - PGPASSWORD=postgres - PGDATABASE=todo - PGSERVER=db - WAIT_HOSTS=db:5432 - PORT=80 ports: - 80:80 depends_on: - db db: image: postgres:latest environment: - POSTGRES_USER=postgres - POSTGRES_PASSWORD=postgres - POSTGRES_DB=todo $ docker-compose up Docker app db Host OS
- 13. Get everything together Python Behave Selenium Docker App Controller Config Web Driver Factory Utils Service Locator Page Objects Asserts Features Steps ...
- 14. Example
- 15. Application under the test
- 17. Features
- 18. Steps
- 19. Steps
- 20. Steps
- 21. Hooks
- 22. Page Object
- 23. Page Object
- 24. Page Object
- 25. App Controller