Fix

tests/test_health.cpp

@@ -14,9 +14,11 @@
 
 #include <boost/asio/co_spawn.hpp>
 #include <boost/asio/io_context.hpp>
+#include <boost/asio/ip/address_v6.hpp>
 #include <boost/asio/ip/tcp.hpp>
 #include <boost/asio/use_future.hpp>
 #include <boost/json.hpp>
+#include <boost/system/error_code.hpp>
 #include <openssl/sha.h>
 #include <raylib.h>
 
@@ -67,6 +69,23 @@ auto health_router(boost::json::value payload) -> ligo::service_router {
   return router;
 }
 
+auto ipv6_loopback_available(boost::unit_test::test_unit_id) -> boost::test_tools::assertion_result {
+  auto io = boost::asio::io_context{};
+  auto acceptor = boost::asio::ip::tcp::acceptor{io};
+  auto error = boost::system::error_code{};
+  acceptor.open(boost::asio::ip::tcp::v6(), error);
+  if (!error) {
+    acceptor.bind({boost::asio::ip::address_v6::loopback(), 0}, error);
+  }
+  // Other setup failures must still be exercised by the HTTP server test.
+  auto unavailable = error == boost::system::errc::address_family_not_supported || error == boost::system::errc::address_not_available || error == boost::system::errc::protocol_not_supported;
+  auto result = boost::test_tools::assertion_result{!unavailable};
+  if (unavailable) {
+    result.message() << "IPv6 loopback is unavailable: " << error.message();
+  }
+  return result;
+}
+
 struct http_service {
   boost::asio::io_context io;
   ligo::http::server server;
@@ -192,7 +211,11 @@ BOOST_AUTO_TEST_CASE(health_uses_configured_bind_and_normalizes_wildcards) {
   BOOST_TEST(vamp_zero::check_health(service.config("0.0.0.0")).has_value());
   auto other = http_service{health_router(healthy_payload()), "127.0.0.2"};
   BOOST_TEST(vamp_zero::check_health(other.config("127.0.0.2")).has_value());
+}
+
+BOOST_AUTO_TEST_CASE(health_normalizes_ipv6_wildcards, *boost::unit_test::precondition(ipv6_loopback_available)) {
   auto ipv6 = http_service{health_router(healthy_payload()), "::1"};
+  BOOST_TEST(vamp_zero::check_health(ipv6.config("[::1]")).has_value());
   BOOST_TEST(vamp_zero::check_health(ipv6.config("[::]")).has_value());
   BOOST_TEST(vamp_zero::check_health(ipv6.config("[0:0:0:0:0:0:0:0]")).has_value());
 }