Difference Between Use Case and Test Case

In the software testing domain, the terms Use case and Test case are the most important and closely related but intensively different.

What is Use Case?

In software testing, a use case is a graphic representation of business needs explaining how the end-user will cooperate with software or an application. And the use cases allow us all the possible techniques of how the end-user uses the application.
In simple words, we can express that with the help of use cases; we can define how to use the system for executing a precise task.
The use case is not a part of execution which means that it is only a graphic demonstration of a document that explains how to implement a particular task.
With the help of the use case, we get to know how the product should work.

A test case is defined as a group of conditions under a test engineer concludes whether a software application is working as per the customer’s requirements or not.
The test case designing includes preconditions, case name, input conditions, and expected result.
These are derived from the test scenarios, and it is a first-level action.
Mainly, test cases are used to validate the developed software by test engineers that the particular software is working as per requirement or not.
A test Case is described as a group of various testing activities like test inputs, execution conditions, and expected results that additionally lead to evolving a particular test objective.
Writing test cases is a one-time attempt that can be used in the future at the time of regression testing.

The key difference between Use case and Test Case

The use case cannot be implemented, which implies that it is only designed. And on the other hand, the test case is designed, and later we implemented them.
The use case is obtained from the BRS (Business requirement specification) whereas the test case is derived from the use case.
The use case is a graphic representation of client requirements, whereas the test case is not represented diagrammatically; it is only documented in an excel sheet.
The use case is a document that always describes the flow of events of an application. In contrast, the test case is a document that always contains an action, event, and expected output of a particular feature of an application.
The use case relies on the software requirements; on the other hand, the test case depends on the use case.
The use case collects the requirements, and on the other hand, the test case will analyze those requirements.
In use case, the results are not verified. On the contrary, the test case results are verified, which means that the test case checks if the result shows in use cases is functioning right.