feat: server info cache (#1671)

fix: #1181

tests/unit/util/ResponseExpirationCacheTests.cpp

@@ -0,0 +1,70 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of clio: https://github.com/XRPLF/clio
+    Copyright (c) 2024, the clio developers.
+
+    Permission to use, copy, modify, and distribute this software for any
+    purpose with or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL,  DIRECT,  INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#include "util/ResponseExpirationCache.hpp"
+
+#include <boost/json/object.hpp>
+#include <boost/json/parse.hpp>
+#include <gtest/gtest.h>
+
+#include <chrono>
+#include <thread>
+
+using namespace util;
+
+struct ResponseExpirationCacheTests : public ::testing::Test {
+protected:
+    ResponseExpirationCache cache_{std::chrono::seconds{100}, {"key"}};
+    boost::json::object object_{{"key", "value"}};
+};
+
+TEST_F(ResponseExpirationCacheTests, PutAndGetNotExpired)
+{
+    EXPECT_FALSE(cache_.get("key").has_value());
+
+    cache_.put("key", object_);
+    auto result = cache_.get("key");
+    ASSERT_TRUE(result.has_value());
+    EXPECT_EQ(*result, object_);
+    result = cache_.get("key2");
+    ASSERT_FALSE(result.has_value());
+
+    cache_.put("key2", object_);
+    result = cache_.get("key2");
+    ASSERT_FALSE(result.has_value());
+}
+
+TEST_F(ResponseExpirationCacheTests, Invalidate)
+{
+    cache_.put("key", object_);
+    cache_.invalidate();
+    EXPECT_FALSE(cache_.get("key").has_value());
+}
+
+TEST_F(ResponseExpirationCacheTests, GetExpired)
+{
+    ResponseExpirationCache cache{std::chrono::milliseconds{1}, {"key"}};
+    auto const response = boost::json::object{{"key", "value"}};
+
+    cache.put("key", response);
+    std::this_thread::sleep_for(std::chrono::milliseconds{2});
+
+    auto const result = cache.get("key");
+    EXPECT_FALSE(result);
+}