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  • 1/15/2014 Agile Testing Method Simplified |Software Testing Times - Tutorials, QTP, Manual Testing Automation Testing, Load Runner

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    Article for newbie who want to know what is agile, how

    agile works, how agile testing methodology is different

    from traditional methodologies and what are the

    challenges in agile.

    Todays trend in Software Development is racing towards

    achieving Targets, Quality and Customer Satisfaction

    within a limited time frame. This is mostly because the

    Business Scenario in todays world is different from what

    it used to be, a few years ago. Most of the Product

    Development companies are now adopting a new age

    concept called Agile Methodology for the Software

    Development Life Cycle.

    Software Testing has been a prime focus ever since the IT

    Industry has realized the importance of Quality of

    Deliverables, no matter what methodology we follow with the Software Development. However, since

    the Software Testing is a part of the Business Model, the Testing process also needs to change

    accordingly. Needless to say, we have so called Agile Testing as a result of such a Business

    Model.

    Introduction to Agile Testing

    While the given application under test is still evolving depending upon the customer needs, the

    mindset of the end user and the current market condition, it is highly impractical to go for the usual

    standard SDLC Models like Water Fall, V&V Model etc. Such models are most suitable for the

    Applications that are stable and non-volatile. The concept of Time-To-Market is the key word in

    todays IT Business that compels the Software vendors to come up with new strategies to save the

    time, resources, cut down the cost involved and at the same time, deliver a reliable product that

    meets the user requirements. In this case, a reasonably good amount of end-to-end testing is carried

    out and the product could be acceptable with known issues/defects at the end of an intermediate

    release. These defects are harmless for the Application usability.

    To adopt such a process in a systematic way, we have a new concept called Agile Methodology. This

    methodology continuously strives to overcome the issues of dynamically changing requirements while

    still trying to maintain a well-defined process.

    The process is as follows:

    1. The Customer prepares the Business Requirements and the Business Analyst or the Engineering

    team reviews it. Ideally, the Quality Assurance/Testing team is also involved in reviewing these

    requirements in order to be able to plan further stages accordingly.

    2. During the Design and Implementation stages, the Engineering team writes User Stories and the

    analysis of issues at various stages. The Customer reviews these on regular basis and updates the

    Requirement specifications accordingly. The Testing team would follow up on regular basis at every

    stage until a consolidated documentation is prepared. This is to ensure that the Customer, the

    Engineering team and the Testing team are at the same page always and thus ensuring complete

    test coverage.

    3. While the Engineering team starts the implementation, the Testing team starts with test planning,

    test strategies and test cases preparation. These would be properly documented and handed over to

    the Customer and the Engineering team for review. This is to ensure the complete test coverage and

    avoid unnecessary or redundant test cases.

    4. As and when the Developer implements the code, the Testing team identifies if the application can

    be built using this code for a quick testing. This is to identify the defects at the early stage so that the

    developer can fix them in the next round on priority basis and continue with further development. This

    iteration continues until the end of the code implementation. Once the testing cycle starts, the Test

    team can now focus more on major test items such as Integration, Usability Testing and System

    Testing etc.

    Scope of testing an application

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    The Testing team knows the complexity involved and it is accepted by the customer that the software

    development and/or the enhancements and hence the testing is a continuous process. Testing of the

    application at a black box level would suffice in order to identify the issues and raise the defects by

    the Testing team. The application continues to evolve until it reaches the stage of final acceptance.

    Hence the scope of testing would continue to evolve as per the Customer needs.

    Process followed at various stages in the product life cycle

    Every intermediate release of the product would be divided into two short cycles, usually of the

    duration of 40 days each. Each cycle would be executed in the following stages. The roles and

    responsibilities of every individual and the team are clearly defined for each stage.

    - Design Specifications: The Testing teams efforts would focus on performing any tool or process

    improvements and reviewing, understanding, and contributing to the nascent specifications.

    - Implementation: While the Engineering/Development team is implementing the code, Testers would

    develop complete Testing Plan and Test Sets (set of test cases) for each of the features included in

    the cycle. Engineering features must be included; they would likely require some level of collaboration

    with the engineering feature developer. All Test Sets should be ready to execute by the end of

    implementation period of the respective cycle. After Test Set preparation, calculate the time

    estimation and prioritization for the Test Set execution based on the complexity and expected

    execution time for each test suite.

    - While the test execution time estimation is notoriously difficult, this number should provide the

    Customer with a starting point for benchmarking.

    - Testing/QA: Test Set execution, raising defects and follow up with the Engineering Team. End-to-

    end validation of the defects. Focus simultaneously on improving the quality of test cases. Watching

    out for and adding new cases as testing proceeds. Testing the software end-to-end to discover

    regressions and subtle systemic issues. Learning to focus more on using the time available to

    uncover the largest number of and most important bugs. Any deviation from the estimated time should

    be communicated across well in advance, so that the schedule can be worked upon depending upon

    the priority of the pending tasks. If there are certain issues or test cases blocking due to unknown

    errors, they would be differed until the beginning of next Testing/QA Cycle.

    - Before acceptance: Follow up on ad-hoc requests/ changes in requirements on a regular basis,

    besides trying to complete the defined tasks.

    Looking at various broad areas of testing of a complex application, the system structure, and the

    depth of functionality implemented and the level of complexity, the complete end-to-end Test

    Execution within a limited time frame would be next to impossible with any standard SDLC Model

    available. The Product/application involves a good deal of learning of how and when to use the

    application and requires that the end user know the functionality of various modules prior to

    constructing a User defined model (UDM) for his Business purpose or even for testing.

    The testing wouldnt be 100% complete in this case before the finished product reaches the hands of

    the end user. This is true especially when the target audience and its system structure are unknown.

    Different users have their own set of ideas and unique problems. Given this fact, it is hard to say that

    it is 100% bug free software when it reaches the customer. Hence, taking into account the

    constraints involved in using the standard SDLC Models, it is worth adopting an approach such as

    Agile Testing, which is more suitable for the dynamically changing requirements.

    Context Driven Testing and Rapid Testing:

    This type of testing is what usually the Agile Testers incorporate. Context Driven testing is the one

    where the test scenarios are not known before hand. It mostly comes from the context in which the

    application is being executed. In our case, it is constructing the UDMs based on a given use case

    from the targeted end user and test it for the scenarios that are explained by his system

    configuration. It also includes constructing the UDMs based on any trouble-shooting discussion

    arising out of defects pointed out during the Customer acceptance and testing.

    Rapid Testing is a process of defining our own strategies to test the Software, not necessarily

    following any specific Process or a Model. It focuses mainly on identifying the defects as quickly as

    possible rather than focusing on the end user requirements.

    Heuristic approach is used in such cases. The tester uses his common sense and previous work

    experience to test the application at various levels in order to figure out where the application stands.

    by Venkata Nagesh Gandikote

    References: http://www.testing.com/agile

    Online Documentation for Agile Testing and Rapid Testing:

    Agile Testing Challenges

    Rapid Software Testing

    Reasons for Agile Testing methodology to test an Application

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