Behavior Driven Development - RBCS, IncBehavior Driven Development Using Tests to Define, Refine,...

Behavior Driven Development Using Tests to Define, Refine, and Verify Behavior


Introductions, Objectives,

and Overview

Time Tested. Testing Improved

Exercises

In many of the exercises, you are working as a tester on the Omninet project

Omninet is a project to deploy a network of public access Internet kiosks in places like malls, theaters, and other public places

On this realistic project, you will have a chance to apply many of the techniques we discuss

Behavior Driven Development

www.rbcs-us.com

Copyright (c) RBCS 2015-2018


BDD, Cucumber, and Gherkins



BDD does not focus on structure of system being developed

BDD focuses on behavioral aspects of the user and how the system helps the user

Gherkin is widely used in the Behavior Driven Development community to describe systems and automate tests


www.rbcs-us.com




Describing behavior

Given

• Something true

• A precondition

When

• Event

• Trigger

Then

• Expected outcome

• Ending state


www.rbcs-us.com




Example description with Given/When/Then syntax: Given I have $100 in checking

And I have $20 in savings

When I transfer $15 from checking

to savings

Then I should have $85 in

checking

And I should have $35 in savings


www.rbcs-us.com



Automating Story Tests with Cucumber

Cucumber is an open source tool used to automate story tests.

Cucumber uses “Gherkin”—a simple business-oriented, domain-specific, human-readable language—to let you describe system behavior and acceptance tests.

Cucumber user acceptance tests can be written by non-programmers.


www.rbcs-us.com




Ref: http://wiki.github.com/aslakhellesoy/cucumber/gherkin


www.rbcs-us.com




Ref: http://dev.camptocamp.com/files/operpScenario/result.html


www.rbcs-us.com




Cucumber basics

Feature file contains user story

Feature file may contain many scenarios

Each scenario has a Given, When, and Then section

Each section has one or more steps

As new “features” are added, developers will need to incrementally add “step” definitions


www.rbcs-us.com



Cucumber Diagram


www.rbcs-us.com



Cucumber Testing Stack

Project Features Scenarios

Steps Step

Definitions Support

Code

Automation Library

Your System


www.rbcs-us.com



Exercise: Make a Gherkin

Consider section 3.1.2 of the Omninet Marketing Requirements Document (which you should already have read)

In small groups, evaluate this user story for section 3.1.2

As an Omninet customer,

I want to pay with a credit card,

So that I can browse the Internet

Define a Gherkin for this user story


www.rbcs-us.com



Debrief

Each team presents its Gherkin to the other teams

Teams can ask question and make comments


www.rbcs-us.com



Building Gherkin Scripts


Gherkin Script Construction

Gherkin scripts reside in a feature file

A feature file relates to a single story

A feature file contains

statement of the story

collection of tests for the story

Tests in the feature file are called scenarios


www.rbcs-us.com




Feature File

Story Scenarios

Scenario

Given

When

Then

Scenario

Given

When

Then

…


www.rbcs-us.com




www.rbcs-us.com




Feature File

Simple unformatted text file

Parsed by Cucumber

Can be created with any text editor

Tools are available to edit Feature Files

• Tg – Tidy Gherkin


www.rbcs-us.com





www.rbcs-us.com




Feature File Keywords

Feature

• Name of the feature


www.rbcs-us.com





Scenario

• Name of the scenario


www.rbcs-us.com





Given

• Preconditions of a scenario


www.rbcs-us.com





When

• Conditions that trigger outcome of scenario


www.rbcs-us.com





Then

• Outcome of scenario


www.rbcs-us.com





And

• Conjunction in Given, When, or Then


www.rbcs-us.com





But

• Conjunction in Given, When, or Then


www.rbcs-us.com





Commentary

• Non-executable explanatory notations


www.rbcs-us.com





Background

• Steps that prefix each scenario

Behavior Driven Development www.rbcs-us.com





www.rbcs-us.com




Feature File Constructs

Data table

• Data tables are a shorthand to provide several pieces of data in one step definition in any part of the Given, When, or Then Section


www.rbcs-us.com





www.rbcs-us.com




Feature File Constructs Scenario Outline

• Used when the same scenario is repeated several times with different data

• Parameterized scenarios


www.rbcs-us.com



Exercise: Make a Gherkin

Consider section 3.1.2 of the Omninet Marketing Requirements Document (which you should already have read)

In small groups, evaluate this user story for section 3.1.2

As an Omninet customer,

I want to pay with a credit card,

So that I can browse the Internet

Define up to three scenarios with associated Gherkins for this user story


www.rbcs-us.com



Debrief

Each team presents its scenarios and Gherkins to the other teams

Teams can ask question and make comments


www.rbcs-us.com



For over 20 years, RBCS has delivered consulting, training, and expert services to clients, helping them with software and hardware testing. Employing the industry’s most experienced and recognized consultants, RBCS advises its clients, trains their employees, conducts product testing, builds and improves testing groups, and hires testing staff for hundreds of clients worldwide. Ranging from Fortune 20 companies to start-ups, RBCS clients save time and money through improved product development, decreased tech support calls, improved corporate reputation and more. To learn more about RBCS, visit www.rbcs-us.com.

Address: RBCS, Inc. 31520 Beck Road

Bulverde, TX 78163-3911 USA Phone: +1 (830) 438-4830 E-mail: [email protected] Web: www.rbcs-us.com

Twitter: @RBCS, @MisterSDET, @LaikaTestDog

Facebook: @TestingImprovedbyRBCS LinkedIn: https://www.linkedin.com/in/rex-black YouTube: https://www.youtube.com/user/RBCSINC

…Contact RBCS


www.rbcs-us.com


Behavior Driven Development - RBCS, IncBehavior Driven Development Using Tests to Define, Refine,...

Documents

Transcript of Behavior Driven Development - RBCS, IncBehavior Driven Development Using Tests to Define, Refine,...