Test Case

A test case is a documented description of how a specific function, process, or system component should be tested to verify that it works according to requirements and specifications. Test cases are a core element of Quality Assurance (QA) and are used in both manual and automated testing.

A test case typically defines preconditions, test steps, input data, expected results, and actual outcomes. Its purpose is to ensure traceability between requirements and test results.

• Test ID: Unique identifier for traceability.

• Preconditions: Conditions that must be met before execution.

• Test Steps: Specific actions to perform.

• Test Data: Input data used during the test.

• Expected Result: The anticipated system behavior.

Test cases are used across different testing levels such as unit testing, system testing, integration testing, and user acceptance testing.

Structured test cases became common as software development processes were formalized during the 1980s and 1990s. In waterfall methodologies, documentation was extensive, while agile approaches later emphasized iterative and automated testing. Today, test cases are often integrated into DevOps and CI/CD workflows.

In Microsoft environments, test cases can be managed in Azure DevOps or previously in TFS. The platform enables linking requirements (Work Items), test cases, and test results. Automated tests can be incorporated into pipelines for continuous quality assurance.

A test case is a structured description of how a function should be tested and what outcome is expected. Clear documentation ensures traceability, quality, and control throughout the development lifecycle.