This document introduces Behavior Driven Development (BDD). It defines BDD as starting with human-readable sentences that describe a feature and how it should work before implementing it in software. It discusses the principles of BDD, including being example-based, specifying features better, and having a shared understanding through discussion. An example feature is provided that uses the Given, When, Then structure to define a scenario for changing an application's status through specific steps. The document also notes that BDD leads to better defined acceptance criteria and living documentation.

1. Introduction To BDD
(Behavior Driven Development)
Presented By: Sudip Pudasaini
Date: 4th SEP, 2015

2. What Is BDD?
Principles Of BDD
Why BDD?
How a Feature Test Is Defined?
Example Feature
Exercise Sample Story
Implementation In FHF
Objectives

3. “It's the idea that you start by writing human-readable
sentences that describe a feature of your application and
how it should work, and only then implement this behavior
in software.”
What Is BDD?

4. What Is BDD?

5. What Is BDD?

6. We Call This “The Three Amigos”
Who What When Then
Shared Understanding
By Discussing Examples
Principles Of BDD

7. Example Based

8. Better specification
Better defined acceptance criteria
Business owner driven TDD
Better understanding of the application context
Continuous integration
Living documentation
Why BDD?

9. Title – Short but explicit description of feature
Narrative – A short narrative describing who, what and why of
feature. User story syntax is common: In order to add entries, as
a user, I can add an entry.
Scenario – Descriptions of specific cases for the narrative with
following:
Initial condition that is true.
The expected outcomes.
Use Given, When, and Then Identifiers
How a Feature Test Is Designed?

10. Given [Context]
And [optional: More context]
When (I do) [Action]
And [optional: More Action]
Then (I should see) [Outcomes]
And [optional: More Outcomes]
Scenario
It's Called Gherkin; BTW

11. Title – Change application status to 'In for Funding'
Narrative – In Order To change the application status to 'In for Funding'
As a underwriter I should be on underwriting dashboard
Scenario: I should login as underwriter
Given I am in login page
And I enter valid credentials of underwriter
When I click on Login button
Then I should render to dealsheet page
And I should see Logo at left top corner
And I should see List of 100 Applications in page
And ….
Example Feature

12. Exercise

13. Implementation In FHF