test: Bring back the unit tests of deprecated features

test/unittests/CMakeLists.txt

@@ -12,6 +12,7 @@ add_executable(
     evmc-unittests
     loader_mock.h
     test_cpp.cpp
+    test_deprecated.cpp
     test_helpers.cpp
     test_instructions.cpp
     test_loader.cpp

test/unittests/test_deprecated.cpp

@@ -0,0 +1,50 @@
+// EVMC: Ethereum Client-VM Connector API.
+// Copyright 2019 The EVMC Authors.
+// Licensed under the Apache License, Version 2.0.
+
+#include <evmc/helpers.hpp>
+
+#include <gtest/gtest.h>
+#include <map>
+#include <unordered_map>
+
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+
+TEST(helpers, fnv1a)
+{
+    const uint8_t text[] = {'E', 'V', 'M', 'C'};
+    const auto h = fnv1a(text, sizeof(text));
+    EXPECT_EQ(h, sizeof(size_t) == 8 ? 0x15e05d6d22fed89a : 0xffaa6a9a);
+}
+
+TEST(helpers, is_zero)
+{
+    auto a = evmc_address{};
+    EXPECT_TRUE(is_zero(a));
+    a.bytes[0] = 1;
+    EXPECT_FALSE(is_zero(a));
+
+    auto b = evmc_bytes32{};
+    EXPECT_TRUE(is_zero(b));
+    b.bytes[0] = 1;
+    EXPECT_FALSE(is_zero(b));
+}
+
+TEST(helpers, maps)
+{
+    std::map<evmc_address, bool> addresses;
+    addresses[{}] = true;
+    ASSERT_EQ(addresses.size(), 1);
+
+    std::unordered_map<evmc_address, bool> unordered_addresses;
+    unordered_addresses.emplace(*addresses.begin());
+    EXPECT_EQ(unordered_addresses.size(), 1);
+
+    std::map<evmc_bytes32, bool> storage;
+    storage[{}] = true;
+    ASSERT_EQ(storage.size(), 1);
+
+    std::unordered_map<evmc_bytes32, bool> unordered_storage;
+    unordered_storage.emplace(*storage.begin());
+    EXPECT_EQ(unordered_storage.size(), 1);
+}