Final Paper/Best Practice/Tutorial Advantages OF BDD Testing

Transcription

1 Final Paper/Best Practice/Tutorial Advantages OF BDD Testing Preeti Khandokar Test Manager Datamatics Global Solutions Ltd

2 Table of Contents Table of Contents... 2 Abstract... 3 Introduction... 3 Solution:... 4 How we do it at Datamatics?... 9 Conclusion: About Datamatics... 12

3 Abstract The purpose of this white paper is to bring out some of the best practices of testing that Datamatics is following while working in Agile testing environment to overcome QA challenges especially around behaviour driven development and associated testing Following are some of the key things that are addressed in this document: BDD Testing importance? BDD Implementation? Application Delivery in BDD? Different Tools to implement BDD Processes? Introduction Behaviour Driven Development (BDD) is a product improvement process which advanced out of many set up Agile practices and is intended to make them more accessible and effective teams. It has developed to incorporate the more extensive picture of Agile Analysis and automated acceptance testing. BDD helps in beating a portion of the difficulties which teams experiences with standard Agile methodologies. Behaviour Driven Development (BDD) is a product improvement process that advanced from Test Driven Improvement (TDD). BDD includes making features (containing scenarios), that are intended to test different behaviours that your application ought to have. This is altogether done totally from the point of view of an end client. BDD results in faster UAT cycles resulting in faster deployments. BDD empowers better coordinated effort over all partners i.e. Clients, Developer s and QA Team members. BDD practice QA is an ongoing process with User Acceptance criteria which makes it the most appropriate practice within Agile.

4 Problem Statement: To understand a project, each team member has to go through high level documentation created by a Business Analyst or the client. While reading the documentation, there is a possibility that the requirement might be misunderstood. Based on this incorrect understanding, a faulty or buggy product is developed; irrespective of Agile or Waterfall model. It s expected that the first step in every project is a discussion about the features, and behaviours of the software to be built. A client or business person comes up to the development team and explains what they want. Sometimes these requirements come in form of an agile user story or in the form of design documents. They could also come as flowcharts or mock-ups or through phone calls. Many teams using Scrum and other agile methods still team suffer following problems. Where to begin What is in testing scope and what is not in testing scope The amount to test in one go What will be the test name? How to analyse failed test cases Solution: Why BDD BDD serves in providing better collaboration between Business Analysts (BAs), Developers, Testers, Customers, and end client. It sets a ground for an easily understandable common domain language for functional testing and for defining functional acceptance criteria. What is BDD BDD is referred to as Specification by Example and it practices TDD. Behaviour Driven Development is more about interactions with the application behaviour and not just unit testing. It forces developers to understand the responsibility of the method he is about to implement. Using various BDD tools, the acceptance criteria written to test the application can be used as guidelines for developers.

5 Benefits of BDD Communication: BDD helps to build a framework for having the right conversations at the right time; which avoids repetitive specification meetings loops. Team Understanding: Strong collaboration result in early discovery of unknown specification, and helps everyone in the team to develop domain expertise. Requirement Understanding: BDD helps in breaking down specification into small pieces of work, and helps the team to reliably predict and meet their delivery schedules. Better Build Quality: BDD helps to built and execute automated tests in early stages of development, which prevents defects at earliest stages of development. Automation: BDD framework makes it easy to turn specification into automated tests. These automated steps are already specified by the specification QA only needs to write a method to perform each step s operations. BDD Process Behavior Driven Development enables QA s to create test scripts from both the developers' and the end client viewpoint. Before the beginning of any iteration; Developers, Project Managers, QAs, and end client define acceptance criteria which should pass in a given iteration, in-order to call the application successful and accepted. This way team comes up with a set of acceptance criteria. All these acceptance criteria are in straight forward English dialect. So, these acceptance criteria serve the purpose of documentation too. BDD gives another vocabulary, and in this manner, concentrates on composing a unit test. Fundamentally it is an element driven way to deal with TDD. It implies outside-in development starting with User Interface definition to code development. Based on acceptance criteria QA will create test scenarios for the given specification you would like to develop, and then follow the BDD process:

6 Create Next Tests Create the Tests [Pass] Execute the Tests [Fail] Refactor the Code [Fail] Execute the Tests [Pass Development continues] [Pass Development stops] 1. Create the Tests 2. Execute the Tests It Fails (Go Red) / It Pass (Go Green) and create next tests 3. Refactor the code and repeat steps 2 & 3 for each step until 4. The Test Passes Go Green 5. Pass Development continues 6. Pass Development stops and you can move on to the next feature These acceptance criteria drive the developers into the development process. It enforces them to write the application code to get the current test step to pass, before moving on to the next step. This process gives a sense of gratification to developers every time a step execution passes. And they know with surety, which specification work and are bug free. BDD Framework Behaviour-Driven Development uses simple domain-specific scripting language. Domain Specific Language focuses on a specific programming prerequisite. It is implemented by converting the domain-specific statements into executable, automated tests. BDD tests use as live documentation of application behaviour and are maintained as extensive and reusable tests.

7 There are many Integration testing frameworks that can be used with BDD. Cucumber supports BDD framework. It offers a way to write tests that anybody can understand, regardless of their technical knowledge. Cucumber can be implemented via different programming languages such as Java, C#, and Ruby. SpecFlow also supports BDD framework which is based on.net Platform. SpecFlow is an open-source tool and its source code is hosted on GitHub. For specifying the Features SpecFlow uses Gherkin Syntax. Cucumber introduced Gherkin format and is also used by other tools. Separate GitHub project is created to maintain Gherkin language, which is independent of SpecFlow. Benefits of BDD with SpecFlow As compared to manual testing it reduces 40-80% of test execution time BDD Feature file can be easily understood by anyone. It creates easy and detail Test execution report. Selenium, Test Complete and QTP can be integrated with SpecFlow easily It supports multiple languages. BDD uses Given/When/Then structure to explain specification: Given: Some initial Condition given by end client (e.g. Given the user has Application Url and enters the Username/ Password). When: Expected action occurs in application (e.g. When the user presses the Login Button). Then: Expected outcome of the action (e.g. Then I expect to see Application Home Page).

8 Here is a simple example: Code Behind: Automation QA translates each step into a method, which is used to implement its Given/When/Then step. The entire scenario is tested by running the corresponding methods step by step.

9 BDD Team Roles BDD team is consists of three main roles that are fulfilled by three different team members. Developer translates user story scenario into a function which is used to implement the steps into given in acceptance criteria. Business Users are domain experts and understands application flows from a user s point of view. This role can be shared with product owner and business analyst. Test Automation QA s are responsible for implementing each scenario using the BDD framework, according to the user stories that were created by the business users. How we do it at Datamatics? Our Focus at Datamatics, is to accelerate software testing process and deliver high quality products in Agile Environment by using BDD Test automation framework. At Datamatics, we implemented a Behaviour-Driven-Test across multiple projects. This approach is single point of continuous interaction between the QA s and End Client. The feature file/application specification is divided into various test scenarios by QA s. Test scenarios are written using Gherkin language which includes the business situation, test data and acceptance criteria. The end client signs-off the feature/application specification based on test data they have provided in acceptance criteria. And reports and dashboard are created in user s language.qa team creates the underlying Business layer/service/ui Automated test scripts for the test scenarios. By using Spec Flow or Cucumber tool the test scenario converts into step a definition which acts as binder between test scripts and test scenarios. And these make sure that single interface is used to execute any of tests. We have implemented well structured test framework to ensure test scenarios are kept separated from the interaction code to reduce the possibility of duplication of code. This ensures test scenarios can reuse common code which reduces the QA s test automation efforts. In other words simple change in product development requires only small changes to the test automation scripts.

10 Product Under Test Interaction Tooling Selenium WebDriver Reporting BDD Reports, Test Failures, Log Files Test Cases Scripts / BDD scenarios (SpecFlow/Cucumber) Interaction Library Page Objects, Utility Classes Test Data Scenario Outline Finally, it facilitates introduction of automation in early stages of application development Conclusion: The key is to achieve high quality product and test automation in the same sprint. Our solution approach is used to reduce the complexity of test automation and making it more useful for end client. It provides early and continuous feedback to the agile application development. It leads automation at every level to achieve rapid development. It supports early automation and early life cycle validation and single-click generation and execution of automation scripts. By developing test automation at an early stage we have achieved higher quality product at every stage of product development. It reduces percent effort for automated test script generation over manual testing. It ensures high defect detection rates (95-98%) due to high test coverage.

11 Author Biography Preeti Khandokar Test Manager Datamatics Global Solutions Ltd. Preeti is Test Manager at DGSL. She has over 11 years of IT experience out of which 10 years are into software testing. She has diversified experience into testing which includes Test Management, SOA/Middleware testing, Agile Test Automation, Implementing solutions for DevOps testing, Web Service testing, Mobile testing. Prior to Datamatics he has worked with companies like Hitachi Consulting, Capgemini and Reliance General Insurance where she has handled multiple roles of Testing Presales, Test Manager, Test Architect, and Automation Tester. She has completed her BE-IT and CDAC. She has expertise in handling onshore and offshore team.

12 About Datamatics Datamatics is a trusted partner to several Fortune 500 Companies globally for managing their End-toend Application Life Cycle & Business Critical Processes. Datamatics is a global Information Technology (IT) and Knowledge Process Outsourcing (KPO) organization focused on delivering smart, nextgeneration business solutions that help enterprises across the world overcome their business challenges. These solutions leverage innovations in technology, knowledge of business processes, and domain expertise to provide clients a competitive edge. As a strategic partner, Datamatics helps its clients improve their business competitiveness and achieve operational efficiencies. The benefits delivered by the Datamatics unique solutions include accelerated time-to-market for new products and services, maximized productivity and efficiency in business processes, shorter turn-around times for service delivery and lower total cost of ownership. Datamatics next-generation solutions and the services span: A cross section of industries including Banking & Finance, Insurance, Publishing, Manufacturing, Research and Retail. Varied business processes that transcend F&A, Enterprise Document Management, Portal Management, Publishing Solutions, Application Development, Support & Testing, Data warehousing & Analytics, Engineering & Embedded solutions, Billing solutions, Enterprise Content solutions. Datamatics has a geographically diverse portfolio of Fortune 500 client s with a footprint across four continents- Americas, Asia, Australia and Europe.

13 THANK YOU!