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metamorphic relation

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Official ISTQB Definition

A description of how a change to an input for a test case affects an expected result based on the required behavior of a test item.

3 Ways to Think About It

💡
The Quick Take

A known relationship between input changes and output changes.

🔍
Look Closer

If you modify the input this way, the output should change that way.

🎯
The Bottom Line

Rules about how outputs should relate when inputs are transformed.

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