Add Validate method to ServerConfig

This adds a new Validate method that checks the getListenConfig call so
that the new SO_REUSEPORT stuff fails in dry run on Windows

Signed-off-by: sinkingpoint <[email protected]>

Author: sinkingpoint

config/confighttp/server.go

@@ -127,6 +127,15 @@ type AuthConfig struct {
 	_ struct{}
 }
 
+func (sc *ServerConfig) Validate() error {
+	_, err := sc.getListenConfig()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
 // ToListener creates a net.Listener.
 func (sc *ServerConfig) ToListener(ctx context.Context) (net.Listener, error) {
 	cfg, err := sc.getListenConfig() // See listen_config_*.go for platform-specific implementations

config/confighttp/server_test.go

@@ -1224,3 +1224,16 @@ func TestServerReusePort(t *testing.T) {
 		})
 	}
 }
+
+func TestServerConfigValidate(t *testing.T) {
+	sc := &ServerConfig{
+		Endpoint:  "localhost:4318",
+		ReusePort: true,
+	}
+
+	if runtime.GOOS == "windows" {
+		require.Error(t, sc.Validate())
+	} else {
+		require.NoError(t, sc.Validate())
+	}
+}