Pro tips for writing great unit tests - Raymond Hettinger

Pro tips for writing great unit tests - PyCon Italia 2022 There is an art to condensing test concepts into readable, fast, clear predicates. We look at many examples and show how they can be improve Master the use of any() and all() with generator expressions. Expression set() relations to express big ideas clearly. Cover the problem space with combinatoric iterators: product(), combinations(), permutations() Use subtests for clear error reporting Factor-out data acquisition and parsing from the test predicates. Learn patterns for testing edge cases. Cover class based technique for test reuse. Make effective use of setup and teardown. We look at many examples and show how they can be improved Treating TDD test cases and bug test cases with special reverence. Speaker: Raymond Hettinger