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GCSE Computer Science · key term
Test values at the limits of an allowed range and immediately outside those limits, used to check whether the boundaries are handled correctly.
Used by AQA and Edexcel
Paper 1
Revise: Types of Test DataBoundary data checks the limits of an allowed range and the values immediately outside them. These are important because a small mistake in a comparison can cause a program to accept or reject the wrong values at an endpoint.
Specification 6.1.6 · Paper 2
Input at or immediately around the limits of an allowed range, used to check how the program handles those limits.
AQA groups boundary and extreme data together. Do not give only the accepted endpoints when asked for boundary data: include the values immediately outside the limits.
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