RoomGameSession

runTest(StandardTestDispatcher(), timeout = TEST_WEDGE_BACKSTOP) {
    val loom = InMemoryLoom()
    val clock = { Instant.fromEpochMilliseconds(0) }
    fun factory() = SeamRoomFactory(loom, backgroundScope, clock)

    // Two peers form one room; the host hands its room to gameOverRoom.
    val hostRoom = factory().host(Pattern("my-game"))
    backgroundScope.launch { factory().join(InMemoryTag("my-game")) }
    hostRoom.roster.first { it.size == 1 }

    val game = backgroundScope.gameOverRoom(
        hostRoom,
        raftConfig = RaftConfig(expectVirtualTime = true, random = Random(1)),
    )

    // Render "who dropped / who's back" from the game's presence — the room's vocabulary, unchanged:
    // game.presence.collect { event ->
    //     when (event) {
    //         is MembershipEvent.Partitioned -> greyOut(event.peerId) // a link went silent
    //         is MembershipEvent.Resumed -> unGrey(event.peerId)      // …a legitimate link heal
    //         else -> Unit
    //     }
    // }
    assertEquals(1, game.roster.value.size) // the joiner is a live member of the game's roster

    game.close()
}