What is on bd?

BD (Behavior Driven Development)

Behavior Driven Development (BDD) is a software development process that emerged from test-driven development (TDD). BDD focuses on describing the behavior of the software from the perspective of the user or stakeholder. It emphasizes collaboration between developers, testers, and business stakeholders to define and validate requirements using concrete examples written in a simple, human-readable format.

Key Principles:

• Focus on Business Value: BDD prioritizes delivering features that directly address business needs. The "why" behind the feature is as important as the "how."
• Collaboration: BDD encourages close collaboration between developers, testers, and business stakeholders. This collaboration helps ensure that everyone has a shared understanding of the requirements.
• Ubiquitous Language: BDD promotes the use of a common, shared language understood by all stakeholders. This ubiquitous language helps to reduce ambiguity and misunderstandings.
• Executable Specifications: BDD uses executable specifications (also called living documentation) to describe the expected behavior of the system. These specifications are written in a human-readable format (e.g., Gherkin) and can be automatically executed to verify that the system behaves as expected.
• Automated Testing: BDD heavily relies on automated testing to ensure that the system meets the defined specifications. Automated tests provide rapid feedback and help to prevent regressions.

Core Practices:

• Discover: Initial discussions with stakeholders to understand the business needs and identify the scope of the feature.
• Formulate: Writing scenarios in a human-readable format (e.g., Gherkin) that describe the expected behavior of the system.
• Automate: Implementing the scenarios as automated tests using a BDD framework (e.g., Cucumber, JBehave, SpecFlow).
• Execute: Running the automated tests to verify that the system behaves as expected.

Benefits of BDD:

• Improved communication and collaboration
• Reduced ambiguity and misunderstandings
• Clearer requirements and acceptance criteria
• Increased test coverage
• Faster feedback loops
• Living documentation that stays up-to-date
• Reduced development costs

Gherkin Language:

Gherkin is a plain-text language used to write executable specifications in BDD. Gherkin uses keywords like Feature, Scenario, Given, When, Then, And, and But to structure the specifications. These keywords help to define the context, the action, and the expected outcome of a scenario.

Example:

Feature: Login

  Scenario: Successful login with valid credentials
    Given the user is on the login page
    When the user enters a valid username and password
    And the user clicks the login button
    Then the user should be redirected to the home page

Tools & Frameworks:

Popular BDD frameworks include:

• Cucumber (Java, Ruby, JavaScript, etc.)
• SpecFlow (.NET)
• JBehave (Java)
• Behave (Python)

In Summary:

BDD is a collaborative approach to software development that focuses on delivering business value by defining and validating requirements using concrete examples written in a human-readable format. It emphasizes communication, collaboration, and automated testing to ensure that the system behaves as expected and meets the needs of the stakeholders.

Here's a summary of the terms mentioned above with links:

• Behavior Driven Development
• Test-Driven Development
• Ubiquitous Language
• Scenarios