CHECK_DIFF        103 modules/core/test/test_operations.cpp #define CHECK_DIFF(a, b) checkDiff(a, b, "(" #a ")  !=  (" #b ")  at l." STR(__LINE__))
CHECK_DIFF        585 modules/core/test/test_umat.cpp #define CHECK_DIFF(a, b) checkDiff(a, b, "(" #a ")  !=  (" #b ")  at l." STR(__LINE__))