Update test_crypto.cpp

blockchain_integration/pi_network/dapi/tests/blockchain/consensus/quantum_resistant/lattice_based/test_crypto.cpp

@@ -1 +1,29 @@
+#include "crypto.h"
+#include <catch2/catch.hpp>
 
+TEST_CASE("Lattice-based cryptography tests") {
+  SECTION("Key generation") {
+    LatticeCrypto crypto;
+    crypto.generate_keys();
+    REQUIRE(crypto.public_key() != "");
+    REQUIRE(crypto.private_key() != "");
+  }
+
+  SECTION("Encryption and decryption") {
+    LatticeCrypto crypto;
+    crypto.generate_keys();
+    std::string plaintext = "Hello, lattice-based cryptography!";
+    std::string ciphertext = crypto.encrypt(plaintext);
+    std::string decrypted_text = crypto.decrypt(ciphertext);
+    REQUIRE(decrypted_text == plaintext);
+  }
+
+  SECTION("Digital signatures") {
+    LatticeCrypto crypto;
+    crypto.generate_keys();
+    std::string message = "This is a test message";
+    std::string signature = crypto.sign(message);
+    bool verified = crypto.verify(message, signature);
+    REQUIRE(verified);
+  }
+}