hard20 pts · first answer countstest-automationtest-doublestest-design

Tests that break on every refactor

Unit tests mock every collaborator and verify exact call sequences. A refactor that keeps behaviour the same breaks 60 tests. What is the underlying problem?

A.The team used too few mocks, so the tests were not isolatedB.Refactoring should never be done once tests existC.The tests check how the code works instead of what it doesD.The mocking library is out of date and must be upgraded

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Tests that break on every refactor

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