Presentation for Liverpool Behat UG opening

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bdd

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It is a tool to bring a structure into agile processes.

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BDD

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BDD is agile enabler.

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is a BDD enabler

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How?

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Requirements Analysis Design Develop Test [Royce 1970] 9 months 3 months 2 months 12 months ...

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Most of the cost in software development is in feedback delay

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Let’s reduce feedback delay

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[Beck & Cunningham 1996-99] Refactoring Code Test Requirements Acceptance

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Let’s rename a few things

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Incremental Design Implement Describe Object Narratives What do you mean [North 03]

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Incremental Design Implement Describe Object Narratives What do you mean StoryBDD TDD

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StoryBDD

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StoryBDD could look like functional TDD to people from outside BDD community, but it’s a lie.

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We are not testing that application functions as we (developers) expect it to, but instead we’re testing that it fullﬁls clients business needs.

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Some applications could easily fullﬁll developers expectations and still not being able to cover business needs.

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You might think about StoryBDD as a technique to teach your clients about testing, but in reality it's a tool to teach you about client business.

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Exploration OF Domain area

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3 levels of domain exploration

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1 2 3 narrative possible scenarios scenario details

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Feature: Authorization In order to get access to the shopping history As a frequent buyer I need to be able to authenticate 1 2 3 possible scenarios scenario details

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Feature: Authorization In order to get access to the shopping history As a frequent buyer I need to be able to authenticate Scenario: Successfully authenticating with correct credentials Given there is a user “everzet” with password “123” And I am on the login page When I fill in “username” with “everzet” And I fill in “password” with “123” And I press “login” Then I should see “Hello, everzet” 1 2 3

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Feature: Authorization In order to get access to the shopping history As a frequent buyer I need to be able to authenticate Scenario: Successfully authenticating with correct credentials Scenario: Can not authenticate with wrong credentials Scenario: Blocked user can not authenticate, even with correct credentials

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Feature: Authorization In order to get access to the shopping history As a frequent buyer I need to be able to authenticate user story =>

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StoryBDD helps ensuring that development team has understanding of business on the same level that client does

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StoryBDD helps ensuring that development team has understanding of business on the same level that client does And even leveling up client knowledge of his business

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How?

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by Forcing you business questions to answer

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1. For who?

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1. For who? 2. What?

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1. For who? 2. What? 3. How?

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1. For who? 2. What? 3. How? Why?

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example Registration

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” I want visitors to be able to register on my website through simple registration form. Your hypothetical client

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1.Who?

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1.Who? users?

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1.Who? users visitors

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1.Who? users visitors 2.Why?

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1.Who? users visitors 2.Why? it’s common?

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1.Who? users visitors 2.Why? it’s common buyings history

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Know your client clients!

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in order to maintain my shopping history as a site visitor i need to be able to register on this site

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in order to maintain my shopping history as a site visitor i need to be able to register on this site Feature: registration

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in order to maintain my shopping history as a site visitor i need to be able to register on this site Feature: registration beneﬁt role (beneﬁtiar)

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in order to maintain my shopping history as a site visitor i need to be able to register on this site Feature: registration benefit role (benefitiar) in order to ... as a ... i need to ... Feature: ... benefit role (benefitiar) in order to ... as a ... i need to ... Feature: ... benefit role (benefitiar) in order to ... as a ... i need to ... Feature: ... benefit role (benefitiar)

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in order to ... as a ... i need to ... Feature: ... benefit role (benefitiar) in order to ... as a ... i need to ... Feature: ... benefit role (benefitiar) in order to ... as a ... i need to ... Feature: ... benefit role (benefitiar) in order to maintain my shopping history as a site visitor i need to be able to register on this site Feature: registration benefit role (benefitiar) SELECT f.* FROM ‘/features’ as f ORDER BY f.role, f.benefit LIMIT 10 PSEUDOAgileQL

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in order to maintain my shopping history as a site visitor i need to be able to register on this site Feature: registration

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in order to maintain my shopping history as a site visitor i need to be able to register on this site Feature: registration Scenario: Successful registration when visitor provides all the required info Scenario: Unable to register when visitor misses required info Scenario: ... Scenario: ... Scenario: ... Scenario: ... Scenario: ...

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in order to maintain my shopping history as a site visitor i need to be able to register on this site Feature: registration Scenario: Successful registration when visitor provides all the required info Given I am on homepage And I follow “sign up” When I fill in “email” with “[email protected]” And I fill in “username” with “linkedin” And I fill in “password” with “sha1_without_salt” And I press “register” Then I should see “You have been successfully registered” And I should be on homepage

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$> vim composer.json { “require-dev”: { “behat/behat”: “~2.4.5”, }, “conﬁg”: { “bin-dir”: “bin/” } } $> curl http://getcomposer.org/installer | php $> php composer.phar install --dev

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$> bin/behat --init +d features +d features/bootstrap +f features/bootstrap/FeatureContext.php

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$> bin/behat ... You can implement step definitions for undefined steps with these snippets: /** * @When /Î fill in “([^”]+)” with “([^”]+)”$/ */ public function iFillInWith($val1, $val2) { throw new PendingException(); } ...

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$> bin/behat --append-snippets

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/** * @Given /Î am on homepage$/ */ public function iAmOnHomepage() { throw new PendingException(); } /** * @Given /Î follow “sign up”$/ */ public function iFollowSignUp() { throw new PendingException(); } /** * @When /Î fill in “([^”]+)” with “([^”]+)”$/ */ public function iFillInWith($val1, $val2) { throw new PendingException(); }

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$> bin/behat Feature: registration in order to maintain my shopping history as a site visitor i need to be able to register on this site Scenario: Successful registration when visitor provides all the required info Given I am on homepage TODO: write pending definition And I follow “sign up” When I fill in “email” with “[email protected]” And I fill in “username” with “linkedin” And I fill in “password” with “sha1_without_salt” And I press “register” Then I should see “You have been successfully registered” And I should be on homepage 1 scenario (1 pending) 8 steps (7 skipped, 1 pending) 0m0.015s

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/** * @Given /^I am on homepage$/ */ public function iAmOnHomepage() { $crawler = new \Some\Crawler\Lib\Crawler(); $crawler->goto(“http://localhost:8080/”); if (200 !== $crawler->getCurrentStatusCode()) { throw new \RuntimeException(‘Can not open homepage’); } }

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$> bin/behat Feature: registration in order to maintain my shopping history as a site visitor i need to be able to register on this site Scenario: Successful registration when visitor provides all the required info Given I am on homepage Can not open homepage And I follow “sign up” When I fill in “email” with “[email protected]” And I fill in “username” with “linkedin” And I fill in “password” with “sha1_without_salt” And I press “register” Then I should see “You have been successfully registered” And I should be on homepage 1 scenario (1 failed) 8 steps (7 skipped, 1 failed) 0m0.015s

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$> vim src/

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Incremental Design Implement Describe Object Narratives What do you mean StoryBDD TDD

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$> bin/behat Feature: registration in order to maintain my shopping history as a site visitor i need to be able to register on this site Scenario: Successful registration when visitor provides all the required info Given I am on homepage And I follow “sign up” TODO: write pending definition When I fill in “email” with “[email protected]” And I fill in “username” with “linkedin” And I fill in “password” with “sha1_without_salt” And I press “register” Then I should see “You have been successfully registered” And I should be on homepage 1 scenario (1 pending) 8 steps (1 passed, 1 pending, 6 skipped) 0m0.015s