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LibTest: Bump up MAX_GEN_ATTEMPTS_PER_VALUE to 30

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The original value 15 was too little: it made our
`weighted_boolean_fair_false` test fail every now and then.

This is because a fair coin (P(false) = 0.5) will hit the same value 15
times in a row with a probability (1/2)^15: around once in a 32k tries.

With the bumped up value, this is now once in 1 billion tries. Should
lower the test flakiness enough (if our random number generator is
truly uniform), while 30 tries is still an OK amount of computation for
randomized tests to do, compared to 15.
This commit is contained in:
Martin Janiczek 2023-11-06 10:41:25 +01:00 committed by Andreas Kling
parent 7e3cfaf08c
commit 49dbc4b5a5
Notes: sideshowbarker 2024-07-17 23:07:41 +09:00 
Author: https://github.com/Janiczek 🔰
Commit: https://github.com/SerenityOS/serenity/commit/49dbc4b5a5
Pull-request: https://github.com/SerenityOS/serenity/pull/21816
1 changed files with 1 additions and 1 deletions
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2
Userland/Libraries/LibTest/TestCase.h
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@ -46,7 +46,7 @@ public:
{
using namespace Randomized;
constexpr u8 MAX_GEN_ATTEMPTS_PER_VALUE = 15;
constexpr u8 MAX_GEN_ATTEMPTS_PER_VALUE = 30;
TestFunction test_case_function = [test_function = move(test_function)]() {
u64 max_randomized_runs = randomized_runs();