test: Add tests for gas refund in SELFDESTRUCT

Author: chfast

test/unittests/evm_state_test.cpp

@@ -397,6 +397,28 @@ TEST_P(evm, selfdestruct_with_balance)
     host.recorded_account_accesses.clear();
 }
 
+TEST_P(evm, selfdestruct_gas_refund)
+{
+    rev = EVMC_BERLIN;  // The last revision with gas refund.
+    const auto code = selfdestruct(0xbe);
+    execute(code);
+    EXPECT_GAS_USED(EVMC_SUCCESS, 7603);  // Cold access to 0xbe.
+    EXPECT_EQ(result.gas_refund, 24000);
+
+    // Second selfdestruct of the same account.
+    execute(code);
+    EXPECT_GAS_USED(EVMC_SUCCESS, 5003);  // Warm access to 0xbe.
+    EXPECT_EQ(result.gas_refund, 0);      // No refund.
+}
+
+TEST_P(evm, selfdestruct_no_gas_refund)
+{
+    rev = EVMC_LONDON;  // Since London there is no gas refund.
+    execute(selfdestruct(0xbe));
+    EXPECT_GAS_USED(EVMC_SUCCESS, 7603);
+    EXPECT_EQ(result.gas_refund, 0);
+}
+
 
 TEST_P(evm, blockhash)
 {

test/unittests/evm_storage_test.cpp

@@ -5,6 +5,7 @@
 /// This file contains EVM unit tests that access or modify the contract storage.
 
 #include "evm_fixture.hpp"
+#include <array>
 
 using namespace evmc::literals;
 using evmone::test::evm;