Types of testing and test plans

Iterative testing:
- Carried out throughout development.
- Each module or section is tested as it’s written.
- Helps identify and fix errors early.
- Useful for things like testing a login function before integrating it into the whole system.

# Iterative test example

def square(n):

return n * n

print(square(4))

Final/terminal testing:
- This happens at the end of development and tests the entire system to make sure everything works.
- Final testing simulates real-world use and is an essential last stage of development.
- For example, on the right and below is a final test and a test plan for age validating access to a children’s activity centre for 5–12 year olds:

# Final test example

def check_age(age):

if age < 5 or age > 12:

return “Rejected”

else:

return “Accepted”

Test data	Type of test data	Expected result	Actual result	Pass/Fail
7	Normal	Accepted	Accepted	Pass
5	Boundary	Accepted	Rejected	Pass
12	Boundary	Accepted	Accepted	Fail (This tells us we have made a logic error with the upper bound)
4	Invalid	Rejected	Rejected	Pass
18	Invalid	Rejected	Rejected	Pass
"ten"	Erroneous	Rejected	Program error	Fail (This tells us we have made a syntax error with handling erroneous data)

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