Panik-Test ohne globalen Hook, begrenzte Gast-Schleifen

Der Test einer Panik im Kern tauscht den globalen Panik-Hook nicht mehr
aus. Das war unnötig, weil der Testläufer die Meldung einer erwarteten
Panik ohnehin zurückhält, und es konnte Meldungen anderer, gleichzeitig
scheiternder Tests verschlucken. Die Gast-Schleifen in den GDScript-Tests
der Brücke laufen höchstens so oft, wie Takte warten, damit ein
abgewichener Gast den Testlauf nicht anhält.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

bridge/src/driver.rs

@@ -229,7 +229,6 @@ impl Driver {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use std::panic;
 
     #[test]
     fn a_host_saves_and_records_its_world() {
@@ -254,12 +253,10 @@ mod tests {
 
     #[test]
     fn a_panic_breaks_the_session_for_good() {
-        // Keep the expected panic from printing a message into the output.
-        let previous = panic::take_hook();
-        panic::set_hook(Box::new(|_| {}));
+        // The test harness keeps the message of this expected panic to itself
+        // and shows it only if the test fails.
         let mut driver = Driver::host(World::new(1));
         let result = driver.guarded(|_| -> u32 { panic!("an internal error") });
-        panic::set_hook(previous);
 
         assert_eq!(result, None);
         assert!(driver.is_broken());

game/tests/test_session.gd

@@ -172,7 +172,7 @@ func _host_and_guest() -> Array[GwSession]:
 	_carry(host, guest)
 	host.step()
 	_carry(host, guest)
-	while guest.pending_ticks() > 0:
+	for i in guest.pending_ticks():
 		guest.step()
 	return [host, guest]
 
@@ -191,7 +191,7 @@ func test_a_guest_follows_its_host_through_the_bridge() -> void:
 		host.step()
 	_carry(host, guest)
 	check_eq(guest.pending_ticks(), 25, "the ticks wait until the guest runs them")
-	while guest.pending_ticks() > 0:
+	for i in guest.pending_ticks():
 		guest.step()
 	check_eq(guest.state_hash_hex(), host.state_hash_hex(), "both worlds are the same")
 	check_eq(guest.local_player(), 1, "the guest is player 1")
@@ -213,7 +213,7 @@ func test_the_hit_of_a_guest_becomes_a_message_to_the_host() -> void:
 	host.step()
 	_carry(host, guest)
 	var events: Array[Dictionary] = []
-	while guest.pending_ticks() > 0:
+	for i in guest.pending_ticks():
 		events.append_array(guest.step())
 	check_eq(events.map(func(event: Dictionary) -> String: return event["type"]), ["tile_hit"], "the guest sees its hit")
 	check_eq(host.damage_codes()[rock.y * host.map_width() + rock.x], 1, "and so does the host")