Model-Based Testing

5 minutes 5 Questions

Model-based testing (MBT) is an emerging concept within Agile Modeling that focuses on the development and utilization of abstract models to support testing activities throughout the project. MBT leverages the power of models to create faster, more effective, and easier to maintain test cases. The approach involves generating test scenarios, test cases, and test scripts based on the models and validating the systems under test against predefined acceptance criteria. As part of the Agile Modeling framework, MBT integrates seamless feedback loops, enabling the efficient detection and rectification of issues or discrepancies that emerge during the testing process.

Guide: Model-Based Testing in Agile Modeling

What it is: Model-Based Testing is a testing technique used in agile project management where an abstract model of the system's functionality is created to generate test cases. The model describes the system behavior and this forms the basis for test generation.

Importance: Model-Based Testing offers several advantages such as reduction of unnecessary tests, improving test case quality, and accelerating test case design. This leads to an increased coverage of aspects being tested and hence, a high-quality model. In agile environments, where iterations happen more frequently, the efficiency provided by Model-Based Testing is a critical factor.

How it works: In Model-Based Testing, a model of the system is created based on the system requirements. Test cases are derived from this model. These test cases are then executed on the real system under test and the results are analyzed to identify any discrepancy with the model's behavior.

Exam Tips: Answering Questions on Model-Based Testing:
1. Understand the Concept: Have a clear understanding of what model-based testing is, its benefits, and how it works2. Examples: Be prepared to give examples of how Model-Based Testing can be applied in different scenarios3. Compare: You may be asked to compare Model-Based Testing with other testing techniques, be ready to identify its unique features4. Application: Questions might focus on the application of Model-Based Testing in real-world situations, practice understanding a system’s requirements, creating an abstract model, and then creating test cases based on this model.

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Question 1

During an Agile planning meeting, one of the stakeholders suggests that the team should use model-based testing. What should be the primary motivation for choosing this approach?

To focus on static code analysis To reduce the cost of software development To improve test coverage and maintainability To speed up the testing process To eliminate the need for testers To find more defects during testing

Correct Answer: To improve test coverage and maintainability

The primary motivation for choosing model-based testing is to improve test coverage and maintainability. Model-based testing does not aim to eliminate testers, speed up testing, or reduce the cost of software development per se. It is a more systematic testing approach that can find defects effectively, but its primary focus is the improvement of test coverage and organization.

Question 2

During a project, your team receives a change request for one of the features. How should you handle this in the context of model-based testing?

Bring the whole system back to a stable state before making changes Update the model and regenerate test cases Continue using the existing test cases and add new ones for the change Create test plans with more emphasis on boundary value analysis Ensure code coverage remains the same Perform manual testing for the new feature only

Correct Answer: Update the model and regenerate test cases

In the context of model-based testing, when dealing with a change request, updating the model and regenerating test cases is the correct approach. This ensures that the system remains consistent and that all test cases still apply with the new feature. The other answers do not align with the principles of model-based testing.

Question 3

Your Agile team is using model-based testing for a web application with different user roles. What benefits should you expect from this approach?

Reducing testing efforts and resources Code coverage improvement Better adaptability, maintainability and reducing test redesign efforts Simplifying the test environment setup Reduction in test execution time Elimination of the need for manual testing

Correct Answer: Better adaptability, maintainability and reducing test redesign efforts

Model-based testing provides better adaptability due to its systematic nature, maintainability, and reduced test redesign efforts. It does not directly affect test execution time, eliminate manual testing, or simplify the test environment setup. Model-based testing does provide better understanding and insight into the system, but its primary goal is to improve test coverage and organization.

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