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Scenario’s in BDD – How and Why?Tricode Slide ShareJanuary 2014

In development it is common to use user stories:

User Story Formats

[Short title]As a [type of user]I want [feature]So that [benefit]

[Short title]In order to [benefit]As a[role]I need [feature]

User Stories for Tic Tac Toe

Starting a new game

As a player

I want to start a new

game

So that I can play the

gameMaking a move

As a player

I want to make a move

So that I can take my turns

in playing the game

Game overAs a playerI want to be told when the

game is overSo that I know whether I

have won or not

In behaviour driven development you will make scenarios out of

user stories:

Starting a new game

Scenarios for Tic Tac Toe

Start a new gameWhen I start a new gameThen I see a blank 3x3 grid

Become first player

Given I start a new game

When I want to become first

playerThen it is my turn to play

Become second playerGiven I start a new gameWhen I want to become second playerThen it is not my turn to play

Scenarios:- Given- When- Then

Game over

Scenarios for Tic Tac Toe

End game in a drawGiven a player has just made his moveAnd he has not wonWhen the grid is completely filledThen the game has endedAnd the game is a drawWin the game

Given a player has just made his moveWhen 3 of his marks are in a horizontal, vertical or diagonal rowThen the game has endedand that player has won

Making a move

Make a (legal) move

Given it is my turn to playWhen I select an empty fieldThen my marker (an X or O) is placed on that field And my turn is over

At Tricode, we

Scenarios

Why Tricode loves scenarios

• Based on explicit user behaviour• Fixed structure, clear communication• An efficiënt software development methodology

- Easy to implement- Easy to verify

• Understandable for both business and development

• Scenarios = test documentation

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