Agile XP TDD BDD

TDD (test-driven development)

XP

TDD development cycle

We can relax, don’t we?

{How to :get feature within sprint?write requirements in “Agile”?know when you are DONE?know that implemented feature is one you were asked to?…

.. but questions still occur:

Feel difference

Where to start What to test What not to test How much to test

Everyone wanted to know: 

Where are the drugs?

BDD(Behavior-Driven Development)

User story – Business value

Scenarios – Acceptance Criteria

Scenarios are executable – automated tests

BDD solution

Given

When

Then

Title <feature>As a [role]

I want [some action to be taken]

so that [I derive some business

value]

USER STORY template

Title: Registered user should have ability to send message to Assure info center.

As a registered user,

I want to ask Assure about new feature,

so that I want to get Contact Us page to send proper message

Given some initial context (the givens),

When an event occurs,

Then ensure some outcomes.

ACCEPTANCE CRITERIA Template

Scenario 1: Registered user should have ability login to the system.

Given opened Assure login screenAnd there is Assure user with valid credentials

When user enters credential to username and password fields and clicks Login button

Then user’s home page is openedAnd Contact Us link is visible

Scenario 2: Logged in user should have ability to send message to info center.

Given opened user’s home page

When user clicks on Contact Us link

Then Contact Us page is openedAnd Submit button appears

Step 1. Write acceptance tests in a natural language that non-programmers can read.

Step 2. Run tests to identify to what tests code is not implemented yet

Step 3. Implement absence code (functionality).

Step 4. Run tests once again and be sure that all tests are passed, repeat step 3 if needed.

BDD workflow

Benefits:

Natural language that non-programmers can read

Focus on business value

Implement just enough to satisfy acceptance criteria

Improved communication

Instruments:

RSpec Cucumber Jbehave PHP Spec Fitnesse Concordion

CONCORDION.. how it works?

DEMO

Retrospective