API Testing · Senior · Question 51 of 75

How can mutation testing evaluate an API test suite?

1Change the API version and see if docs update
2Change test data randomly and see if the server notices
3Change server logic slightly and see if any API test fails

Show the answer

Correct answer: Change server logic slightly and see if any API test fails

Explanation

If flipping a validation rule leaves all tests green, the suite doesn't check it. Mutation scores point to weak assertions.

Further reading

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