📝 Mastering Test Plans

A roadmap to bug-free software!

What is a Test Plan?
It is a formal document that lists what will be tested, how it will be tested, and what the expected result should be. We don't just "guess"—we plan!

Scenario 1: The Library Age Limit

Problem: A digital library allows users aged 5 to 18 to register. Any other age should be rejected.

Test Type	Input Data	Expected Outcome	Reason
Normal	12	Accepted	Well within the valid range.
Abnormal	"Ten"	Error Message	Wrong data type (String instead of Integer).
Extreme	5	Accepted	The minimum valid value.
Extreme	18	Accepted	The maximum valid value.

Scenario 2: The Discount Code

Problem: A shop app accepts a percentage discount between 1% and 50%.

Test Type	Input Data	Expected Outcome	Reason
Normal	25	Discount Applied	Typical valid input.
Abnormal	-10	Rejected / Error	Negative numbers are invalid here.
Extreme	1	Discount Applied	The lower boundary of the range.
Extreme	50	Discount Applied	The upper boundary of the range.

Pro Tip: When building a test plan, always include a Boundary Test. For Scenario 2, testing 51 (the first invalid number outside the limit) is the best way to see if your if statements are working correctly!

Next Step: Open your Python IDE and try coding these limits! 🚀