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Test what happens for a player who isn't the owner

In ClientSim, the master owns every GameObject without VRCObjectSync or VRCObjectPool, and Networking.SetOwner can't change that. The local player is the master by default, so code that behaves differently for a player who doesn't own a GameObject never takes that path in a test. Session.SetOwner gives the GameObject another owner.

Steps​

  1. Start the session and spawn a remote player:

    yield return Session.Start();
    VRCPlayerApi remote = Session.SpawnRemotePlayer("Remote");

  2. Make the remote player the owner of the GameObject your behaviour is on:

    Session.SetOwner(remote, door.gameObject);

  3. Call your behaviour as the local player, who now doesn't own it, and assert on what it did:

    door.Open();

    Assert.That(door.IsOpen, Is.False);

After Session.SetOwner, Networking.SetOwner works on that GameObject too. If the code under test takes ownership before acting, check that it did:

door.TakeOverAndOpen();

Assert.That(Networking.IsOwner(door.gameObject), Is.True);

The local player as a non-master​

To test as a player who isn't the master, start the session with Session.Start(localPlayerIsMaster: false). ClientSim spawns a remote player before the local one, and that player is the master.