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by a_imho 3323 days ago
There is PIT[1], it calls it mutation testing, but I guess it is roughly the same idea

To put it another way - PIT runs your unit tests against automatically modified versions of your application code. When the application code changes, it should produce different results and cause the unit tests to fail. If a unit test does not fail in this situation, it may indicate an issue with the test suite.

[1]http://pitest.org/