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Year 8 · Summer 2 · Raid: App Forge

Raid build: user testing and improvements

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What this lesson covers

Topic 14 Programming further

KS3 Computing · Real programs keep data in lists, take text apart as strings, split work into subroutines, check their input, save to files, and get tested on purpose.

Programming Computational ThinkingCambridge Lower Secondary Computing 0860

You will learn to

  • Use user testing: watch another guild use the app without helping them.
  • Write down what testers did, not what you hoped they would do.
  • Fix the two most important problems, then test again.
  • Rehearse a pitch with a live demo of the app.

Success criteria

  • I can watch a tester without helping, and write down what they did.
  • I can sort what testers found into 'breaks it', 'misses the brief' and 'nice extra'.
  • I can show two fixes working.
  • I can present my part of our pitch.

Key words

Say each word, then read what it means. Every one is in the glossary too.

Boundary
Test data at the very edge of what's allowed.
List
One name holding many values in order. Also called an array.
Index
An item's position in a list, counting from 0.
Subroutine
A named block of code you can call when needed.
Function
A subroutine that returns a value.
Parameter
A placeholder in a subroutine for a value passed in.
Validation
Checking input is reasonable before using it.
Boundary data
Test data at the very edge of what's allowed.

The explanation

Read it here, or open the study page below to go one step at a time with things to try.

Testing

For a program that accepts a score from 0 to 50:

Test dataMeaningExamplesExpected
NormalSensible data23, 38Accepted
BoundaryAt the very edges0, 50 (and -1, 51)0 and 50 accepted; -1, 51 rejected
ErroneousWrong type or nonsense"hello", 3.7, blankRejected with a message
★Remember

A test plan is written before testing: what you'll test, the data, the expected result.

Study it

Open the study page and go one step at a time.

Topic 14 · Year 9

Programming further

Real programs keep data in lists, take text apart as strings, split work into subroutines, and get tested on purpose.

Check yourself

One question at a time. The reason shows after each answer.

Saved on this device.