What is BDD? Behavior-Driven Development Testing Explained

BDD testing is the software testing practice of describing test steps in simple lyric so that both technical and non-technical stakeholders can feature a shared understanding of the codification.

The goal of BDD is to ameliorate collaboration between the technical side and the business side of the organization.

BDD vs. BDD Testing

BDD (Behavior-driven development)is the methodology for software development where quizzer use a divided occupation language to draw package scenarios.

A common BDD language is Gherkin. Here 's a description of the Login scenario written in Gherkin:

Feature: User Login

& nbsp; Scenario: Successful login with valid credentials
& nbsp; & nbsp; Given the user is on the login page
& nbsp; & nbsp; When the user enters valid credential
& nbsp; & nbsp; And clicks the login push
& nbsp; & nbsp; Then the user should be redirected to the splasher
& nbsp; & nbsp; And see a welcome message

BDD testing is the process of automatize and executing these BDD scenario.

What is the Gherkin language?

The Gherkin words is a unique business-readable language use to describe scheme doings and scenarios. It is structured by three primary statements: Given, When, and Then, with each statement describing a specific view of the scheme.

• The Given statementset up the initial context for the behaviour and define the starting point of the scheme.
• The When statementdescribes the trigger that brings about a modification or behavior in the system.
• The Then statementdefines the expected event that should be observed after the case mention in the When statement.

After articulating the system behavior in Gherkin, BDD testers & nbsp;turn it into a exam scriptthat can be understood by the computer.

Rules in Writing Gherkin Statements

• Besides Given, When, and Then statements, testers can also use early keywords such as & nbsp;Feature, Rule, Example, And, But, Background, Scenario Outline, Examplesto describe the behavior. & nbsp;

• You should use these keywords at the start of a line.

• Comments are permitted at the offset of a new line and begin with optional spaces, postdate by a hash sign (#) and text. & nbsp;

• Indentation can be achieved using spaces or check, with a recommended indentation level of two spaces.

Why Do We Need BDD?

BDD is based on the mind that thetres amigos & nbsp;(i.e., three friends) & nbsp;in software development don ’ t always share the same perspectives. A common ground between them must be established to facilitate suave communication.

The tres amigos include:

• Product Owner: symbolize the business side, they just want tosolve a problem & nbsp;they receive.
• Developer: representing the development side, they desire to & nbsp;build a solution to solve the problem & nbsp;of the Product Owner.
• Tester: symbolize the QA side, they want to & nbsp;cognize if the answer can actually solve the problem, and & nbsp;what can possibly go incorrect with the solution.

The traditional approach to testing execute not connect the perspectives of thetres amigos:

• Stakeholders come to the ware possessor to reassign their requisite

• The product owner then excuse those requirements to developers and tester.

• Developers then translate the prerequisite into codification, while the examiner translate them into test cases.

It was a lengthy process, and loss in rendering can occur, which inescapably leads to misinterpretation.

Instead, with BDD, thetres amigoscome together and get a word, then become the perceptivity into a documentation employ a share language to make a mutual understanding of the issue at hand. Testers can then use a BDD examination framework to create test cases.

Advantages of BDD Testing

With BDD quiz, you can:

• Have a common language for engineers and stakeholders to intercommunicate about user needs and software answer.
• Craft exploiter stories and scenarios to define acceptance criteria for specific software features.
• Promote collaboration among users, quality team, merchandise team, and engineer to achieve consensus on the projection 's goals.
• Reduce uncertainties.
• Enable faster product delivery by the speedy creation of mutually concord upon & nbsp;automated tests.
• Reduce errors in package execution by converting business requirements into a open format for all executed tests.
• Minimize the learning bender and jargon.

Limitations of BDD Testing

However, BDD essay is not without limitations:

• Potentially conduct to lengthy stakeholder meetings and the comprehension of all key stakeholders in the BDD process.
• Demands well-prepared software requirements for the Gherkin scripts to accurately express the job want, which may conflict with the fast-paced nature of Agile teams act from concise spec.
• Less efficient for small development teams.

Steps To Do BDD Testing

Day-to-day BDD activity involves a three-step summons:

1. Discovery
2. Formulation
3. Automation.

These steps facilitate your team confidently make changes to the system. The code reflects the certification, which reflects everyone 's savvy of the trouble.

1. Discovery Stage

During the & nbsp;Discovery stage, stakeholders participate in structured conversations called & nbsp;discovery workshops & nbsp;(besides known as brainstorming sessions) where they discuss and reach a common agreement on the craved goals.

They start by express the user storey or requirement in a concise formatting, such as:

“ As a [persona], I want [end] so that [benefit]. ”

After that, they brainstorm examples of how the user story should behave in different scenarios. These examples focus on concrete situation and help to define the expected behavior.

The team so writes each example on glutinous notes or a digital tool, arranging them in a structured formatting. A common formatting includes:

• Columns for the example
• A brief description
• Rules or constraints
• Any open questions or areas of doubt.

This approaching is known as “ Example Mapping ''. Created by the founder of Cucumber, one of the nearly democratic BDD testing fabric, Example Mapping ’ s goal is to create a shared savvy of user stories or requirements by breaking them down into small, concrete representative for thethree amigoto follow.

2. Formulation Stage

The team converts discussions into characteristic files using Gherkin.These files carry scenario that delineate how the system should behave.

This stage ensures that both technical and non-technical team members can read and validate the expected behavior before indite any codification.

Below are the detailed Gherkin statement to describe the business scenario of “ As a customer, I want to be capable to place an online order for products and receive real-time update on the position of my order ”
 

Feature: Online Order Placement and Status Updates

& nbsp; & nbsp; As a customer,

& nbsp; & nbsp; I desire to be able to place an online order for products

& nbsp; & nbsp; And receive real-time updates on the status of my order
 

& nbsp; & nbsp; Scenario: Placing an Online Order

& nbsp; & nbsp; & nbsp; & nbsp; Given I am a registered customer

& nbsp; & nbsp; & nbsp; & nbsp; And I am logged in to the online store

& nbsp; & nbsp; & nbsp; & nbsp; And there are available ware for purchase

& nbsp; & nbsp; & nbsp; & nbsp; When I add a merchandise to my go-cart

& nbsp; & nbsp; & nbsp; & nbsp; And I proceed to the checkout process

& nbsp; & nbsp; & nbsp; & nbsp; And I provide the necessary order point

SUSA automates exploratory testing with persona-driven behavior, catching bugs that scripted automation misses.

& nbsp; & nbsp; & nbsp; & nbsp; And I affirm my order

& nbsp; & nbsp; & nbsp; & nbsp; Then my order should be successfully lay

& nbsp; & nbsp; & nbsp; & nbsp; And I should receive an order confirmation e-mail
 

& nbsp; & nbsp; Scenario: Tracking Order Status

& nbsp; & nbsp; & nbsp; & nbsp; Given I have placed an order

& nbsp; & nbsp; & nbsp; & nbsp; And I have receive an order substantiation

& nbsp; & nbsp; & nbsp; & nbsp; When I visit the order tracking page

& nbsp; & nbsp; & nbsp; & nbsp; Then I should see the current condition of my order

& nbsp; & nbsp; & nbsp; & nbsp; And the status should be updated in real-time
 

& nbsp; & nbsp; Scenario: Order Status Notification

& nbsp; & nbsp; & nbsp; & nbsp; Given I have placed an order

& nbsp; & nbsp; & nbsp; & nbsp; And I have opted to receive order status notice

& nbsp; & nbsp; & nbsp; & nbsp; When there is a modification in my order status

& nbsp; & nbsp; & nbsp; & nbsp; Then I should receive a real-time notification

& nbsp; & nbsp; & nbsp; And the notification should include the updated status of my order

3. Automation Stage

Finally, the written Gherkin scenarios are turned into automated tests. Each of the steps is map to their corresponding code section.

Steps To Do BDD in TDD

Test-driven development (TDD)is an iterative process where codification caliber is guided and continuously improved through trial. The process of TDD is:

1. Define behavior with BDD utilise Gherkin (Given - When - And - Then)
2. Writetests (even before writing code). The idea is to run these tests and watch them miscarry. After that, we write code until the tests pass, essentially using the tests to drive the development process.
3. Run the tests and catch them initially betray because the code make n't exist yet.
4. Write code. Execute unit tests again until the exam pass.
5. Refactor the existing code to pass the tests while improving design, legibility, and maintainability. & nbsp;

What Are BDD Testing Frameworks?

BDD testing model are creature that provide support for apply BDD practices and automating BDD tests. They bridge the gap betweenbusiness requirements and tryout automation.

Popular BDD Testing Frameworks

1. Cucumber

Cucumber is a highly popular BDD testing framework. Initially developed in Ruby, it now supports various programme languages, include Java and JavaScript. Its popularity stay strong within the Ruby developer community due to its conversance. Some organisation combine Cucumber with Selenium to achieve honest test mechanisation with an vehemence on plain language. This approaching Foster share understanding, improved collaboration, and scalable web quiz across multiple browsers. & nbsp;

Read More:

2. SpecFlow

SpecFlow is a extremely sought-after BDD framework for .NET. It offers two versions: open-source and premium (SpecFlow+). The open-source variant requires a separate unit test runner like MSTest or Unit to execute trial scenarios. In contrast, SpecFlow+ includes a built-in runner suitable for BDD testing. The premium variation of SpecFlow also furnish additional characteristic such as Microsoft Excel integrations, living support, and premium support.

3. Quantum

Quantum, an open-source BDD testing framework developed by Perfecto, offers system a powerful option for expand automation travail. Quantum enables stable execution of BDD automated tryout in the cloud, ensuring reliability on clean and secure Android/iOS device and desktop browser. Users can leverage all the conversant features of Cucumber BDD, include data table, scenario outlines, examples, and backgrounds.

4. JBehave

JBehave is a renowned BDD framework for Java and other JVM languages like Groovy, Kotlin, and Scala. As one of the original BDD framework, JBehave holds a potent reputation among developer and test engineer. However, it 's deserving mentioning that JBehave lacks certain mutual Gherkin features. Teams assay a fully compliant Java or JVM-language BDD framework oft include Cucumber-JVM in their valuation.

How To Do BDD Testing with Katalon and Cucumber? 

is a comprehensive QA resolution that allows teams to make mechanisation tests forweb, API, and mobile,execute them on cloud across a wide range of browser, so render in-depth reporting.

Katalon supports BDD essay on Cucumber, allowing testers to get the best of both worlds, leveraging the BDD capabilities of Cucumber while utilizing the rich features provided by Katalon:

• Import BDD feature files into Katalon to leverage its centralised test direction features
• Easily create test scripts with Katalon ’ s low-code test authoring features
• Link BDD steps with exam scripts to track test results
• Generate detailed test reports in BDD style

After & nbsp;, simply navigate to File & gt; New & gt; BDD Feature File to create a Cucumber feature file in Katalon.

Give your feature file a name. If you check the “ Generate sample feature file template, ” a total BDD script guide written in Gherkin will be make for you to freely cut.

Here is a simple Gherkin scenario as shown below:

Scenario: Login functionality

& nbsp; & nbsp; & nbsp; & nbsp; Given I navigate to the login page

& nbsp; & nbsp; & nbsp; & nbsp; When I enter my username

& nbsp; & nbsp; & nbsp; & nbsp; And I recruit my password

& nbsp; & nbsp; & nbsp; & nbsp; And I click on the login button

& nbsp; & nbsp; & nbsp; Then I should be log in successfully

At this stage, you should see that there is a yellowed highlight on each step in the characteristic file. This hap because we have not yet create the step definition or test script for each step (i.e., missing glue code – small part of code or script that link two technology together, which are Cucumber and Katalon in this context).

Therefore, the following step involves creating the step definition in the step file. In the left sidebar, navigate to Include & gt; features & gt; scripts & gt; groovy & gt; (default package). Here you can right pawl, select New & gt; Step Definition and create a Groovy script.

As you can see, each of the BDD steps above have been associate with its corresponding test definition.

After that you can start leveraging the fast test authoring feature of Katalon to transubstantiate the BDD lineament file into a full test book within seconds. There are two notable methods:

1. Built-in keywords: these are essentially code snippets that you can sweep and drop to construct the test case.
2. Record-and-Playback: this feature records the sequence of actions on your screen, retrieves the xPath of the objects you interact with, and become them into a Selenium script that can be re-executed across multiple environments. Simply put in your terminus URL, choose the browser and run.
   

Read more: & nbsp;Cucumber BDD Automation Testing With Katalon

Although these are low-code feature, Katalon still allow you to watch the total script, and you can complete the functions in the step definition file with the respective newly generated codification. Finally, navigate to the top toolbar and click Run. Your device will run automatically and after the test is complete you can see the & nbsp;.

It is easygoing to see how the capabilities of Cucumber are significantly expand with Katalon:

• Low code, fast test authoring instead of coding examination playscript from abrasion
• Coding fashion available for extra customization of test book
• Cross-browser examination and execution for higher test coverage
• Katalon test scripts can be hold and easy updated through centralize management scheme, which is less resource intensive than Selenium scripts
• Elaborated trial solvent generation in BDD manner