Martin Hořeňovský dcafc605f3 Only reseed the internal RNG when a test is first entered ... This fixes multiple issues with random generators, with the most important one being that multiple nested generators could return values from the same sequence, due to internal implementation details of `GENERATE`, and how they interact with test case paths. The cost of doing this is that given this simple `TEST_CASE`, ```cpp TEST_CASE("foo") { auto i = GENERATE(take(10, random(0, 100)); SECTION("A") { auto j = GENERATE(take(10, random(0, 100)); } SECTION("B") { auto k = GENERATE(take(10, random(0, 100)); } } ``` `k` will have different values between running the test as a whole, e.g. with `./tests "foo"`, and running only the "B" section with `./tests "foo" -c "B"`. I consider this an acceptable cost, because the only alternative would be very messy to implement, and add a lot of brittle and complex code for relatively little benefit. If this calculation changes, we will need to instead walk the current tracker tree whenever a random generator is being constructed, check for random generators on the path to root, and take a seed from them.		2022-05-17 21:49:26 +02:00
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catch2	Only reseed the internal RNG when a test is first entered	2022-05-17 21:49:26 +02:00
CMakeLists.txt	Make Random*Generators be seedable	2022-05-17 17:57:21 +02:00