Test case design techniques
Software Testing Lifecycle
What is Test Case Design?
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Test Case Design involves creating test cases to verify the functionality and quality of a software product.
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Ensures comprehensive and effective testing.
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Utilizes various techniques to enhance coverage and accuracy.
Why is it Important?
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Maximum Coverage: Ensures all possible usage scenarios are tested.
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Efficiency: Reduces redundancy and optimizes resources.
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Defect Detection: Identifies errors early before release.
Main Categories of Techniques
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Black-box Testing (Functional/Behavioral)
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White-box Testing (Structural/Code-based)
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Experience-based Testing (Exploratory/Intuitive)
Black-box Techniques
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Equivalence Partitioning (EP): Divides input data into valid and invalid partitions.
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Boundary Value Analysis (BVA): Tests values at and near input boundaries.
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Decision Table Testing: Uses tables mapping input combinations to outputs based on rules.
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State Transition Testing: Tests systems with defined states and transitions.
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Use Case Testing: Tests complete business scenarios from the end-user's perspective.
White-box Techniques
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Statement Coverage: Ensures all code statements are executed at least once.
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Branch Coverage: Verifies all branches from decision points are tested.
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Path Coverage: Tests all possible paths through the code.
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Condition Coverage: Evaluates each Boolean condition for both TRUE and FALSE outcomes.
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Multiple Condition Testing: Tests all combinations of multiple conditions.
Experience-based Techniques
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Exploratory Testing: Simultaneous learning, test design, and execution.
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Error Guessing: Relies on the tester's intuition and experience to predict problem areas.
Example of Applying Techniques
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EP & BVA: Testing input fields like age (e.g., 18–60).
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State Transition: Verifying transitions in order statuses (e.g., "Processing" → "Shipped").
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Decision Table: Testing combinations of conditions for discount eligibility.
Advantages of Applying Techniques
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Improved Software Quality: Comprehensive testing leads to higher quality.
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Reduced Risk of Missed Defects: Thorough coverage minimizes undetected issues.
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Optimized Testing Process: Efficient use of resources and time.
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Enhanced Tester Effectiveness: Structured approach aids testers in identifying defects.
When to Apply Each Technique
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EP & BVA: For input validation and boundary conditions.
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State Transition & Decision Table: For complex logic and business processes.
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Exploratory & Error Guessing: For identifying unexpected defects.
Best Practices in Test Case Design
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Use standard templates for consistency.
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Ensure traceability to requirements.
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Regularly update test cases to reflect changes in the product.
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Conduct reviews to identify gaps or improvements.
Conclusion
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Test case design techniques are fundamental for effective and efficient software testing.
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Their proper application ensures high-quality products and satisfied end-users.
Test case design techniques
By TenantCloud
Test case design techniques
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