Bound notification delivery and expansion

client_notification_test.go

@@ -4,6 +4,7 @@ import (
 	"io"
 	"strings"
 	"testing"
+	"time"
 
 	"git.stormux.org/storm/barnard/gumble/gumble"
 )
@@ -34,6 +35,24 @@ func TestReadFIFOStopsOnEOF(t *testing.T) {
 	}
 }
 
+// Regression: sequential substitutions re-expanded placeholders embedded in
+// server-provided fields, and a slow notifier blocked callback goroutines.
+func TestNotificationExpansionIsSinglePassAndNotifyDoesNotBlock(t *testing.T) {
+	got := expandNotification("%event %what", []string{"event", "who", "%event"})
+	if got != "event %event" {
+		t.Fatalf("unexpected expansion %q", got)
+	}
+	b := &Barnard{notifyChannel: make(chan []string, 1)}
+	b.Notify("one", "", "")
+	done := make(chan struct{})
+	go func() { b.Notify("two", "", ""); close(done) }()
+	select {
+	case <-done:
+	case <-time.After(time.Second):
+		t.Fatal("Notify blocked on a full queue")
+	}
+}
+
 func TestUserChangeNotification(t *testing.T) {
 	current := &gumble.Channel{ID: 1, Name: "Current"}
 	other := &gumble.Channel{ID: 2, Name: "Other"}