mzuenni tests

1 files changed, 62 insertions, 0 deletions

diff --git a/test/graph/matching.cpp b/test/graph/matching.cpp
new file mode 100644
index 0000000..b8fbc6c
--- /dev/null
+++ b/test/graph/matching.cpp
@@ -0,0 +1,62 @@
+#include "../util.h"
+namespace tutte {
+void gauss(int n, ll mod);
+#include <graph/matching.cpp>
+#include <math/shortModInv.cpp>
+#include <math/lgsFp.cpp>
+}
+#include <graph/blossom.cpp>
+
+void stress_test() {
+	ll queries = 0;
+	for (int tries = 0; tries < 5'000; tries++) {
+		int n = Random::integer<int>(1, 30);
+		int m = Random::integer<int>(0, max<int>(1, n*(n-1) / 2 + 1));
+
+		GM blossom(n);
+		srand(Random::rng());
+		tutte::adj.assign(n, {});
+
+		Graph<NoData> g(n);
+		g.erdosRenyi(m);
+		g.forEdges([&](int a, int b){
+			tutte::adj[a].push_back(b);
+			tutte::adj[b].push_back(a);
+
+			blossom.adj[a].push_back(b);
+			blossom.adj[b].push_back(a);
+		});
+
+		ll got = tutte::max_matching();
+		ll expected = blossom.match();
+
+		if (got != expected) cerr << "got: " << got << ", expected: " << expected << FAIL;
+		queries += n;
+	}
+	cerr << "tested random queries: " << queries << endl;
+}
+
+constexpr int N = 125;
+constexpr int M = 5'000;
+void performance_test() {
+	timer t;
+	Graph<NoData> g(N);
+	g.erdosRenyi(M);
+	srand(Random::rng());
+	tutte::adj.assign(N, {});
+	g.forEdges([&](int a, int b){
+			tutte::adj[a].push_back(b);
+			tutte::adj[b].push_back(a);
+	});
+
+	t.start();
+	hash_t hash = tutte::max_matching();
+	t.stop();
+	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();
+}