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fix: Ensure all loaded scenes are registered on session owner promotion #4214
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,130 @@ | ||
| using System.Collections; | ||
| using System.Text; | ||
| using NUnit.Framework; | ||
| using Unity.Netcode; | ||
| using Unity.Netcode.TestHelpers.Runtime; | ||
| using UnityEngine.SceneManagement; | ||
| using UnityEngine.TestTools; | ||
|
|
||
| namespace TestProject.RuntimeTests | ||
| { | ||
| /// <summary> | ||
| /// Validates that a client promoted to session owner registers the scenes it loaded outside of | ||
| /// <see cref="NetworkSceneManager"/> so it can synchronize newly joining clients. | ||
| /// Runs against the DAHost by default and against the live CMB service when USE_CMB_SERVICE is set. | ||
| /// </summary> | ||
| internal class SessionOwnerPromotionSceneTests : NetcodeIntegrationTest | ||
| { | ||
| private const string k_LocallyLoadedScene = "EmptyScene"; | ||
| protected override int NumberOfClients => 2; | ||
|
|
||
| private Scene m_OriginalActiveScene; | ||
| private Scene m_LocallyLoadedScene; | ||
|
|
||
| public SessionOwnerPromotionSceneTests() : base(HostOrServer.DAHost) { } | ||
|
|
||
| protected override void OnOneTimeSetup() | ||
| { | ||
| m_OriginalActiveScene = SceneManager.GetActiveScene(); | ||
| base.OnOneTimeSetup(); | ||
| } | ||
|
|
||
| protected override IEnumerator OnTearDown() | ||
| { | ||
| SceneManager.SetActiveScene(m_OriginalActiveScene); | ||
| if (m_LocallyLoadedScene.IsValid() && m_LocallyLoadedScene.isLoaded) | ||
| { | ||
| var scene = m_LocallyLoadedScene; | ||
| SceneManager.UnloadSceneAsync(scene); | ||
| yield return WaitForConditionOrTimeOut(() => !scene.isLoaded); | ||
| } | ||
| yield return base.OnTearDown(); | ||
| } | ||
|
|
||
| private NetworkManager m_InitialSessionOwner; | ||
|
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||
| /// <summary> | ||
| /// Avoids <see cref="NetcodeIntegrationTest.GetAuthorityNetworkManager"/> since it fails the test when | ||
| /// invoked before a new session owner has been promoted. | ||
| /// </summary> | ||
| private bool IsNewSessionOwnerPromoted(StringBuilder errorLog) | ||
| { | ||
| // Have to do our own loop looking for a session owner as GetAuthorityNetworkManager will fail the test if no session owner is found. | ||
| // It is expected that no session owner will be found for a frame or two during session owner promotion. | ||
| NetworkManager sessionOwner = null; | ||
| foreach (var networkManager in m_NetworkManagers) | ||
| { | ||
| if (networkManager.LocalClient.IsSessionOwner) | ||
| { | ||
| sessionOwner = networkManager; | ||
| break; | ||
| } | ||
| } | ||
|
|
||
| if (sessionOwner == null || sessionOwner == m_InitialSessionOwner) | ||
| { | ||
| errorLog.AppendLine("No new session owner has been promoted."); | ||
| return false; | ||
| } | ||
|
|
||
| var allClientsSynchronized = true; | ||
| foreach (var networkManager in m_NetworkManagers) | ||
| { | ||
| if (networkManager.CurrentSessionOwner != sessionOwner.LocalClientId) | ||
| { | ||
| errorLog.AppendLine($"[Client-{networkManager.LocalClientId}] Incorrect {nameof(NetworkManager.CurrentSessionOwner)}! Expected: {sessionOwner.LocalClientId}. Has: {networkManager.CurrentSessionOwner}."); | ||
| allClientsSynchronized = false; | ||
| } | ||
| } | ||
| return allClientsSynchronized; | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Loads and activates a scene without using <see cref="NetworkSceneManager"/>, promotes a new session owner, | ||
| /// and then verifies the promoted session owner can synchronize late joining clients. | ||
| /// </summary> | ||
| [UnityTest] | ||
| public IEnumerator PromotedSessionOwnerSynchronizesLocallyLoadedActiveScene() | ||
| { | ||
| // Load and activate a scene outside of NetworkSceneManager after the session has started, | ||
| // so no NetworkManager instance has a network scene handle registered for it. | ||
| var loadOperation = SceneManager.LoadSceneAsync(k_LocallyLoadedScene, LoadSceneMode.Additive); | ||
| Assert.NotNull(loadOperation, "Failed to load test scene!"); | ||
|
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| yield return WaitForConditionOrTimeOut(() => loadOperation.isDone); | ||
| AssertOnTimeout($"Timed out waiting for {k_LocallyLoadedScene} to load!"); | ||
|
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| // Set the newly loaded scene as the active scene | ||
| // Now all clients have this unregistered scene as their active scene. | ||
| m_LocallyLoadedScene = SceneManager.GetSceneByName(k_LocallyLoadedScene); | ||
| SceneManager.SetActiveScene(m_LocallyLoadedScene); | ||
|
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| // Now all clients have this unregistered scene as their active scene. | ||
| m_InitialSessionOwner = GetAuthorityNetworkManager(); | ||
|
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| // Sanity check: Double-check the newly loaded scene is unregistered on all clients | ||
| foreach (var networkManager in m_NetworkManagers) | ||
| { | ||
| var isSceneRegistered = networkManager.SceneManager.ClientSceneHandleToServerSceneHandle.ContainsKey(m_LocallyLoadedScene.handle); | ||
| Assert.That(isSceneRegistered, Is.False, $"[Client-{networkManager.LocalClientId}] Scene loaded by the UnityEngine SceneManager should not have been registered!"); | ||
| } | ||
|
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| if (m_UseCmbService) | ||
| { | ||
| // the CMB service promotes a client when the current session owner disconnects | ||
| yield return StopOneClient(m_InitialSessionOwner); | ||
| } | ||
| else | ||
| { | ||
| // The DAHost can manually promote another client as the session owner. | ||
| m_InitialSessionOwner.PromoteSessionOwner(GetNonAuthorityNetworkManager().LocalClientId); | ||
| } | ||
|
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| yield return WaitForConditionOrTimeOut(IsNewSessionOwnerPromoted); | ||
| AssertOnTimeout("Session owner promotion failed!"); | ||
|
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||
| // Connect a late-joining client to verify the new session owner handles the previously unregistered scene. | ||
| yield return CreateAndStartNewClient(); | ||
| } | ||
| } | ||
| } | ||
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This test can pass if a future change removes promotion-time scene registration and the late joiner never synchronizes
EmptyScene.AddActiveSceneToClientSynchronizationnow warns and returns when the active scene has no mapping.EmptyScenecontains noNetworkObject, andCreateAndStartNewClientchecks connection and player clones rather than scene synchronization. Assert that the promoted owner registers the scene after promotion. Assert that the late joiner has a synchronizedEmptyScenemapped to the promoted owner's canonical handle.🤖 Helpful? 👍/👎
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This is a regression test for a bug where subsequent joins fail. I don't really care if the scene fails to synchronize, only that subsequent joiners can successfully join.