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muts_core

Mutations from mutmut:

  1. Number + 1
  2. str -> XXstrXX
  3. lambda x: ... -> lambda x: None, lambda x: 0
  4. dict(a=b, c=d) -> dict(aXX=b, c=d), dict(a=b, cXX=d)
  5. foo(a, b) -> foo(b), foo(a)
  6. a.lower() -> a.upper()
  7. Remove any unary operators
  8. is -> is not, is not -> is, in -> not in, not in -> in, break -> return, continue -> break
  9. True -> False, False -> True, deepcopy -> copy
  10. This mapping:

{ cst.Plus: cst.Minus, cst.Add: cst.Subtract, cst.Minus: cst.Plus, cst.Subtract: cst.Add, cst.Multiply: cst.Divide, cst.Divide: cst.Multiply, cst.FloorDivide: cst.Divide, cst.Modulo: cst.Divide, cst.LeftShift: cst.RightShift, cst.RightShift: cst.LeftShift, cst.BitAnd: cst.BitOr, cst.BitOr: cst.BitAnd, cst.BitXor: cst.BitAnd, cst.Power: cst.Multiply, cst.AddAssign: cst.SubtractAssign, cst.SubtractAssign: cst.AddAssign, cst.MultiplyAssign: cst.DivideAssign, cst.DivideAssign: cst.MultiplyAssign, cst.FloorDivideAssign: cst.DivideAssign, cst.ModuloAssign: cst.DivideAssign, cst.LeftShiftAssign: cst.RightShiftAssign, cst.RightShiftAssign: cst.LeftShiftAssign, cst.BitAndAssign: cst.BitOrAssign, cst.BitOrAssign: cst.BitAndAssign, cst.BitXorAssign: cst.BitAndAssign, cst.PowerAssign: cst.MultiplyAssign, cst.LessThan: cst.LessThanEqual, cst.LessThanEqual: cst.LessThan, cst.GreaterThan: cst.GreaterThanEqual, cst.GreaterThanEqual: cst.GreaterThan, cst.Equal: cst.NotEqual, cst.NotEqual: cst.Equal, cst.And: cst.Or, cst.Or: cst.And, }

  1. mutate all augmented assignments (+=, *=, |=, etc.) to normal = assignments
  2. mutate a = b to a = None and a = None to `a = ""
  3. Drop the case statements in a match.

Example prompt (in Russian):

Я запустил мутационное тестирование и узнал, что если мы в файле @awaits/utils/end_of_wrappers.py в 15 строке мы заменим 0 на 2 - этого мутанта наши тесты не убивают. Напиши ОДИН тест, который его убьет. Для этого тебе нужно 1. понять общую логику этого участка кода; 2. понять, как она ломается, если мы сделаем это изменение; 3. временно изменить этот участок кода и попробовать запустить тесты, убедиться, что не падают; 4. написать тест, который проверяет ту логику, которую ты выявил, он должен падать; 5. "починить" код, который ты сломал, и убедиться, что тест больше не падает; 6. если не сработало - попробуй вернуть все как было и снова начать с 1 пункта, но придумать другую гипотезу, и так по кругу, пока не получится (сами гипотезы где-то записывай, чтобы не повторяться). В итоге должен получиться ОДИН новый тест (убедись, что он всего один!), все остальное состояние репозитория должно остаться нетронутым.

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