Use Case Testing Technique

Software Testing Tutorial 18

This tutorial explains Use Case Testing Technique

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In use case , an actor is represented by "A" and system by "S"
First we list the Main Success Scenario
Consider a first step of an end to end scenario where the Actor enters Agent Name and password .
In the next step system will validate the password
Next, if password is correct , Access is granted.
There can be extension of this use case
In case password is not valid system will display message and ask for re-try four times
Or if Password not valid four times system will close the application
Here we will test the success scenario and one case of each extension