test: Add unit tests for system call execution

Author: chfast

test/unittests/CMakeLists.txt

@@ -46,6 +46,7 @@ target_sources(
     state_new_account_address_test.cpp
     state_precompiles_test.cpp
     state_rlp_test.cpp
+    state_system_call_test.cpp
     state_transition.hpp
     state_transition.cpp
     state_transition_block_test.cpp

test/unittests/state_system_call_test.cpp

@@ -0,0 +1,40 @@
+// evmone: Fast Ethereum Virtual Machine implementation
+// Copyright 2023 The evmone Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+#include <evmone/evmone.h>
+#include <gtest/gtest.h>
+#include <test/state/state.hpp>
+#include <test/utils/bytecode.hpp>
+
+using namespace evmc;
+using namespace evmone::state;
+
+TEST(state_system_call, non_existient)
+{
+    evmc::VM vm;
+    State state;
+
+    system_call(state, {}, EVMC_CANCUN, vm);
+
+    EXPECT_EQ(state.get_accounts().size(), 0);
+}
+
+TEST(state_system_call, sstore_timestamp)
+{
+    static constexpr auto BeaconRootsAddress = 0x000F3df6D732807Ef1319fB7B8bB8522d0Beac02_address;
+
+    evmc::VM vm{evmc_create_evmone()};
+    const BlockInfo block{.number = 1, .timestamp = 404};
+    State state;
+    state.insert(BeaconRootsAddress, {.code = sstore(OP_NUMBER, OP_TIMESTAMP)});
+
+    system_call(state, block, EVMC_CANCUN, vm);
+
+    ASSERT_EQ(state.get_accounts().size(), 1);
+    EXPECT_EQ(state.get(BeaconRootsAddress).nonce, 0);
+    EXPECT_EQ(state.get(BeaconRootsAddress).balance, 0);
+    const auto& storage = state.get(BeaconRootsAddress).storage;
+    ASSERT_EQ(storage.size(), 1);
+    EXPECT_EQ(storage.at(0x01_bytes32).current, 404);
+}