Scenario Matrix Template

About

A Scenario Matrix Template for Unit Testing is a structured way to list, organize, and track test scenarios at the smallest functional level of the software the unit. A unit is typically the smallest testable part of an application, such as a method, function, or class.

This matrix helps QA engineers and developers ensure that every code path, edge case, and dependency interaction is tested thoroughly in isolation. It enables:

• Clear mapping of scenarios to specific unit behaviors

• Easy tracking of coverage for normal, boundary, and error conditions

• Consistency in test design across team members

• Reduced defects in higher testing levels by catching them early

For effective unit testing, scenarios often include valid inputs, invalid inputs, boundary conditions, exception handling, dependency mocking, and performance checks — all while ensuring tests run fast and remain independent from external systems.

Template

Scenario ID	Scenario Description	Preconditions	Test Data / Inputs	Steps to Execute	Expected Result	Priority	Remarks
UT-01	Validate correct output for valid inputs	Unit/module available	Valid input parameters	Call the method with valid inputs	Method returns expected output	High	Basic functional verification
UT-02	Handle invalid or null inputs	Unit/module available	Invalid or null input values	Call the method with invalid inputs	Method throws expected exception or handles gracefully	High	Ensures robustness
UT-03	Boundary value testing	Unit/module available	Boundary values (min, max)	Pass boundary values to method	Output matches expected boundary behavior	High	Prevents off-by-one errors
UT-04	Test exception handling	Unit/module available	Input causing an error	Call method and trigger exception scenario	Exception is handled as per design	Medium	Validates error handling
UT-05	Dependency mocking	Unit with dependencies available	Mocked dependency behavior	Inject mocks and call method	Method behaves correctly with mocked dependencies	High	Isolates unit behavior
UT-06	Performance check for method	Unit/module available	Test data for performance	Measure execution time	Method executes within acceptable time	Medium	Ensures efficiency
UT-07	Verify data persistence logic	Unit/module with DB call available	Mock DB or in-memory DB	Call method to persist data	Data is persisted as expected	Medium	Avoids integration-level dependency in unit tests
UT-08	Parameterized test coverage	Unit/module available	Multiple input sets	Run parameterized tests	All variations return correct results	Medium	Improves coverage without redundancy
UT-09	Thread-safety verification	Unit/module with concurrent access	Multiple threads calling method	Simulate concurrent execution	No race conditions or inconsistent state	Low	Applies to concurrent units
UT-10	Code path coverage check	Unit/module available	Inputs covering different paths	Execute tests covering all branches	All branches executed and validated	High	Ensures full logical coverage