Add basic tcp socket test

crates/lb/src/net.rs

@@ -124,7 +124,11 @@ impl lb_netlib {
     }
 
     extern "Lua-C" fn __parse_skaddr(&self, addr: &str) -> Result<lb_socketaddr> {
-        Ok(addr.parse()?)
+        Ok(if let Ok(addr) = addr.parse() {
+            SocketAddr::new(addr, 0).into() // default port 0
+        } else {
+            addr.parse::<SocketAddr>()?.into()
+        })
     }
 
     /// Creates a new TCP socket configured for IPv4.

crates/lb/tests/net.lua

@@ -0,0 +1,17 @@
+local ok, net = pcall(require, "lb:net")
+if not ok then return end
+
+describe("tcp", function()
+  describe("socket", function()
+    test("bind", function()
+      local socket = net:bind_tcp("127.0.0.1")
+
+      -- binds to the correct port
+      assert(tostring(socket:local_addr():ip()) == "127.0.0.1")
+      assert(socket:local_addr():port() ~= 0)
+
+      -- should not be able to rebind socket
+      assert(not pcall(socket.bind, socket, net:socketaddr("127.0.0.1")))
+    end)
+  end)
+end)