add tests

test/Attacker_test.cpp

@@ -0,0 +1,37 @@
+#include <catch2/catch.hpp>
+#include <iostream>
+
+#include <rte_cycles.h>
+
+TEST_CASE("tsc timer", "[]") {
+    // count and print seconds since test started
+    // stop at 30 seconds
+    // const std::string clear(100, '\n');
+    const uint64_t MAX_SECONDS = 30;
+    uint64_t cycles_old = 0;
+    uint64_t cycles = 0;
+    uint64_t hz = rte_get_tsc_hz();
+    uint64_t seconds = 0;
+    uint64_t delta_t = 0;
+
+    // print initial message
+    std::cout << "cycles : " << cycles << "\t"
+              << "hz : " << hz << "\t"
+              << "seconds : " << seconds << "\t" << std::endl;
+
+    while (seconds < MAX_SECONDS) {
+        cycles_old = cycles;
+        cycles = rte_get_tsc_cycles();
+        hz = rte_get_tsc_hz();
+
+        // calculate
+        delta_t = uint64_t(1 / hz * (cycles - cycles_old));
+        seconds += delta_t;
+
+        // print
+        // std::cout << clear;
+        std::cout << "cycles : " << cycles << "\t"
+                  << "hz : " << hz << "\t"
+                  << "seconds : " << seconds << "\t" << std::endl;
+    }
+}