From 502148a176244689765d5ebcaf062129f293b3bd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pawe=C5=82=20Bylica?= <chfast@gmail.com>
Date: Fri, 28 May 2021 15:54:15 +0200
Subject: [PATCH] test: Add EIP-3198 unit tests

---
 test/unittests/CMakeLists.txt               |  1 +
 test/unittests/evm_eip3198_basefee_test.cpp | 34 +++++++++++++++++++++
 2 files changed, 35 insertions(+)
 create mode 100644 test/unittests/evm_eip3198_basefee_test.cpp

diff --git a/test/unittests/CMakeLists.txt b/test/unittests/CMakeLists.txt
index 54940c2b56..a7e60aa506 100644
--- a/test/unittests/CMakeLists.txt
+++ b/test/unittests/CMakeLists.txt
@@ -14,6 +14,7 @@ add_executable(evmone-unittests
     evm_test.cpp
     evm_calls_test.cpp
     evm_eip2929_test.cpp
+    evm_eip3198_basefee_test.cpp
     evm_state_test.cpp
     evm_other_test.cpp
     evmone_test.cpp
diff --git a/test/unittests/evm_eip3198_basefee_test.cpp b/test/unittests/evm_eip3198_basefee_test.cpp
new file mode 100644
index 0000000000..74607b489c
--- /dev/null
+++ b/test/unittests/evm_eip3198_basefee_test.cpp
@@ -0,0 +1,34 @@
+// evmone: Fast Ethereum Virtual Machine implementation
+// Copyright 2021 The evmone Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+/// This file contains EVM unit tests for EIP-3198 "BASEFEE opcode"
+/// https://eips.ethereum.org/EIPS/eip-3198
+
+#include "evm_fixture.hpp"
+
+using namespace evmc::literals;
+using evmone::test::evm;
+
+TEST_P(evm, basefee_pre_london)
+{
+    rev = EVMC_BERLIN;
+    const auto code = bytecode{OP_BASEFEE};
+
+    execute(code);
+    EXPECT_STATUS(EVMC_UNDEFINED_INSTRUCTION);
+}
+
+TEST_P(evm, basefee_nominal_case)
+{
+    // https://eips.ethereum.org/EIPS/eip-3198#nominal-case
+    rev = EVMC_LONDON;
+    host.tx_context.block_base_fee = evmc::bytes32{7};
+
+    execute(bytecode{} + OP_BASEFEE + OP_STOP);
+    EXPECT_GAS_USED(EVMC_SUCCESS, 2);
+
+    execute(bytecode{} + OP_BASEFEE + ret_top());
+    EXPECT_GAS_USED(EVMC_SUCCESS, 17);
+    EXPECT_OUTPUT_INT(7);
+}