cucumber-iii

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Behavior Driven Development

CUCUMBER

Chaitanya Kumar Reddy(338057) – 29/09/2015


Introduction

Behavior Driven Development

Use vs. Don’t Use

Cucumber Feature File

Step Definition

References

Agenda


Introduction

Cucumber is a tool based on BDD (Behavior Driven Development) framework.

Cucumber is used to write acceptance tests for a web application.

It allows the developer to develop the test cases in a very easy way, that everyone can understand.

Cucumber was implemented in Ruby and later extended to Java.

Cucumber can be used along with Selenium.

Cucumber Supports many other languages like Perl, PHP, Python, .Net etc.


Behavior Driven Development (BDD)

Behavior-driven development is an agile software development technique that encourages collaboration between developers, QA and non-technical participants in a software project.

Behavior Driven Development is emerged from Test Driven Development.

TDD BDD


Use vs. Don’t Use

Cucumber is useful: Separation of examples and automation Possess structure but not too much Pressure to grow a ubiquitous language Just enough syntax

Cucumber is not useful: Small set of tests Too much overhead Only developers will look at the tests Working with Regular expressions


Cucumber Feature File

Every cucumber project consists of a directory named features.

This directory contains feature files with extension “.feature”

Feature file contains following components:

Feature Scenario/Scenario Outline

• Given• When • Then • And• But


Cucumber Feature File ..cont.

Feature: This will describe about the current feature file.

Scenario: Describes the steps and expected output for the test case.

- Below is the example for scenario:



Scenario Outline: A scenario that is executed for multiple sets of data. Below is the example for defining Scenario Outline.



Given: Specifies the context of the test to be executed and puts the system in known state.

When: Specifies the key action to be performed.

Then: Observes the output.

And/But: If there are several ‘Given’s, ‘When’s and ‘Then’s. We can use And/But to replace some of them.


Step Definition

Every step in the feature file will be having a step definition.

Step Definition will have the code to perform the actions.

Step Definition will have the string that matches the string in feature file.

-- feature


Below are the step definitions for the above feature.

Step Definition ..cont.


Step Definition ..cont.

In step definitions we will write selenium code to automate the test cases.


References

https://github.com/cucumber/

https://github.com/cucumber/cucumber/wiki/Given-When-Then

https://github.com/cucumber/cucumber/wiki/Given-When-Then


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