What is the difference between Use Case, Test Scenario and Test Case

 


Use Case, Test Scenario, and Test Case are terms commonly used in software development and testing, and they refer to different levels of detail and abstraction in the testing process. Here's a brief explanation of each term:

  1. Use Case:

    • Purpose: Use cases are high-level descriptions of how a system will interact with an external entity (such as a user or another system) to achieve a specific goal.
    • Scope: They provide a broad overview of the system's functionality and focus on user interactions and system responses.
    • Example: In the context of an e-commerce application, a use case could be "Place an Order," outlining the steps a user takes to complete a purchase.

  2. Test Scenario:

    • Purpose: Test scenarios are derived from use cases and represent a set of test conditions or a testing situation.
    • Scope: They cover a broader aspect of the application's functionality and can include multiple test cases.
    • Example: Taking the "Place an Order" use case, a test scenario might be "Test the checkout process for a registered user with valid payment information." This scenario could include various test cases to validate different aspects of the checkout process.

  3. Test Case:

    • Purpose: Test cases are specific conditions or variables under which a tester will determine whether an application works as intended.
    • Scope: They are detailed, specific, and focus on a particular aspect of the system's functionality.
    • Example: Continuing with the example, a test case within the "Test the checkout process" scenario could be "Verify that the 'Place Order' button is functional and completes the transaction."

The relationship between these terms is hierarchical, with use cases providing an overall system perspective, test scenarios breaking down use cases into testing situations, and test cases providing detailed steps to validate specific aspects of those situations.

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