mzuenni tests

1 files changed, 42 insertions, 0 deletions

diff --git a/test/math/modExp.cpp b/test/math/modExp.cpp
new file mode 100644
index 0000000..ebb38eb
--- /dev/null
+++ b/test/math/modExp.cpp
@@ -0,0 +1,42 @@
+#include "../util.h"
+#include <math/modExp.cpp>
+
+void stress_test() {
+	ll queries = 0;
+	for (ll i = 0; i < 10'000; i++) {
+		int a = Random::integer<int>(1, 100);
+		int n = Random::integer<int>(2, 100);
+		ll expected = 1;
+		ll k = 0;
+		do {
+			auto got = powMod(a, k, n);
+			if (got != expected) cerr << "got: " << got << ", expected: " << expected << FAIL;
+			k++;
+			expected = (expected * a) % n;
+		} while (k < 100);
+		queries += n;
+	}
+	cerr << "tested queries: " << queries << endl;
+}
+
+constexpr int N = 1'000'000;
+void performance_test() {
+	timer t;
+	hash_t hash = 0;
+	for (int operations = 0; operations < N; operations++) {
+		ll a = Random::integer<ll>(0, 1'000'000'000);
+		ll b = Random::integer<ll>(0, 1'000'000'000);
+		ll n = Random::integer<ll>(2, 1'000'000'000);
+		t.start();
+		hash += powMod(a, b, n);
+		t.stop();
+	}
+	if (t.time > 750) cerr << "too slow: " << t.time << FAIL;
+	cerr << "tested performance: " << t.time << "ms (hash: " << hash << ")" << endl;
+}
+
+int main() {
+	stress_test();
+	performance_test();
+}
+