chore: Update boost usages to match 1.88 (#2355)

tests/unit/util/SpawnTests.cpp

@@ -0,0 +1,62 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of clio: https://github.com/XRPLF/clio
+    Copyright (c) 2025, 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/Spawn.hpp"
+
+#include <boost/asio/io_context.hpp>
+#include <boost/asio/spawn.hpp>
+#include <boost/asio/strand.hpp>
+#include <gtest/gtest.h>
+
+#include <stdexcept>
+
+TEST(SpawnTest, SpawnOnIoContext)
+{
+    EXPECT_ANY_THROW([] {
+        boost::asio::io_context io;
+        util::spawn(io, [](boost::asio::yield_context) { throw std::runtime_error("Test exception in coroutine"); });
+
+        io.run();
+    }());
+}
+
+TEST(SpawnTest, SpawnOnStrand)
+{
+    EXPECT_ANY_THROW([] {
+        boost::asio::io_context io;
+        auto str = boost::asio::make_strand(io);
+        util::spawn(str, [](boost::asio::yield_context) { throw std::runtime_error("Test exception in coroutine"); });
+
+        io.run();
+    }());
+}
+
+TEST(SpawnTest, SpawnOnCoroutine)
+{
+    EXPECT_ANY_THROW([] {
+        boost::asio::io_context io;
+        util::spawn(io, [](boost::asio::yield_context yield) {
+            util::spawn(yield, [](boost::asio::yield_context) {
+                throw std::runtime_error("Test exception in coroutine");
+            });
+        });
+
+        io.run();
+    }());
+}