From 8d11c6c8213f46f0fa19826917c255edd5d43cb1 Mon Sep 17 00:00:00 2001 From: mzuenni Date: Sun, 28 Jul 2024 22:54:40 +0200 Subject: Test (#4) * update * moved content in subdir * rename file * add test setup * add test setup * add github action * automaticly test all cpp files * timeout after 10s * setulimit and dont zero memory * test build pdf * install latexmk * update * update * ngerman * fonts * removed old code * add first test * added tests * test in sorted order * more tests * simplified test * more tests * fix suffix tree * fixes and improvements * done ust lst directly * fix swap * add links to pdf * fix constants * add primorial * add comment * various improvements * more tests * added missing stuf * more tests * fix tests * more tests * more tests * more tests * fix recursion? * test trie * more tests * only use python temporarily for listings * only use python temporarily for listings * more tests * fix longestCommonSubstring * more tests * more tests * made code more similiar * fix? * more tests * more tests * more tests * add ahoCorasick test + limit 4GB stack size * more tests * fix test * add additional test * more tests * more tests * fix? * better fix * fix virtual tree * more tests * more tests * recursive closest pair * more tests * decrease limit * new tests * more tests * fix name * more tests * add test * new test * more tests * more tests * more tests * more tests * new test and content * new code * new code * larger tests * fix and test * new test * new test * update pdf * remove comments * new test * more tests * more testcases * more tests * increased limit * more tests * more tests * more tests * new tests * more tests * shortened code * new test * add basic tests for bigint * more tests * removed old files * new test * ignore some files * more auto more ccw * fix test * more tests * fix * new tests * more tests * more tests * stronger test * actually verify delaunay... * more tests * fix header * more tests * run tests parallel? * test parralel? * add --missing * separate workflows * test * is the pdf checked? * separate workflows * fix workflow * more workflows --------- Co-authored-by: Yidi --- test/math/cycleDetection.cpp | 47 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 test/math/cycleDetection.cpp (limited to 'test/math/cycleDetection.cpp') diff --git a/test/math/cycleDetection.cpp b/test/math/cycleDetection.cpp new file mode 100644 index 0000000..bf57aed --- /dev/null +++ b/test/math/cycleDetection.cpp @@ -0,0 +1,47 @@ +#include "../util.h" +#include +#include + +pair naive(ll x0, function f) { + map seen; + ll d = 0; + while (seen.find(x0) == seen.end()) { + seen[x0] = d; + d++; + x0 = f(x0); + } + return {seen[x0], d - seen[x0]}; +} + +void stress_test() { + ll queries = 0; + for (ll i = 0; i < 1000'000; i++) { + int m = Random::integer(1, 100); + int c = Random::integer(0, m); + auto f = [&](ll x){return (x*x + c) % m;}; + int x0 = Random::integer(0, m); + auto got = cycleDetection(x0, f); + auto expected = naive(x0, f); + if (got != expected) cerr << "error: " << got.first << " " << got.second << " " << expected.first << " " << expected.second << FAIL; + queries += got.second; + } + cerr << "tested queries: " << queries << endl; +} + +constexpr ll M = 18'086'183; +void performance_test() { + timer t; + auto f = [&](ll x){return (1337*x + 42) % M;}; + t.start(); + auto [a, b] = cycleDetection(42, f); + t.stop(); + hash_t hash = a + b; + if (t.time > 500) cerr << "too slow: " << t.time << FAIL; + cerr << "tested performance: " << t.time << "ms (hash: " << hash << ")" << endl; +} + +int main() { + stress_test(); + performance_test(); +} + -- cgit v1.2.3