Add testcase and fix for ASIO ipv4 localhost support (#649)

- Bugfix: Implement two listening sockets in ASIO (ipv4+ipv6) when either we start with `--http-forceloopback` or we resort to that mode because of a failure to bind to the "any" address

1 files changed, 27 insertions, 0 deletions

diff --git a/src/zenserver-test/zenserver-test.cpp b/src/zenserver-test/zenserver-test.cpp
index 5dfbc6327..9074485b6 100644
--- a/src/zenserver-test/zenserver-test.cpp
+++ b/src/zenserver-test/zenserver-test.cpp
@@ -198,6 +198,33 @@ TEST_CASE("default.single")
 			 zen::NiceRate(RequestCount, (uint32_t)Elapsed, "req"));
 }
 
+TEST_CASE("default.loopback")
+{
+	std::filesystem::path TestDir = TestEnv.CreateNewTestDir();
+
+	ZenServerInstance Instance(TestEnv);
+	Instance.SetTestDir(TestDir);
+	const uint16_t PortNumber = Instance.SpawnServerAndWaitUntilReady("--http-forceloopback");
+
+	ZEN_INFO("Running loopback server test...");
+
+	SUBCASE("ipv4 endpoint connectivity")
+	{
+		cpr::Session cli;
+		cli.SetUrl(cpr::Url{fmt::format("http://127.0.0.1:{}/test/hello", PortNumber)});
+		auto res = cli.Get();
+		CHECK(!res.error);
+	}
+
+	SUBCASE("ipv6 endpoint connectivity")
+	{
+		cpr::Session cli;
+		cli.SetUrl(cpr::Url{fmt::format("http://[::1]:{}/test/hello", PortNumber)});
+		auto res = cli.Get();
+		CHECK(!res.error);
+	}
+}
+
 TEST_CASE("multi.basic")
 {
 	ZenServerInstance	  Instance1(TestEnv);