TrafficStats keeps packets and bytes in and out per second and the busiest
packet and game message types. dServer counts at its send and receive calls
and adds RakNet's connection statistics (datagrams, resends, ping); the report
goes to master as SERVER_TRAFFIC (appended), which passes it to the dashboard.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A new server (dUgcServer, started by master with enable_ugc_server=1) that
takes unprocessed ugc and ugc_modular_build rows from the database and makes
what the client downloads with UGCUSE3DSERVICES: an optimized NIF (hidden
faces removed, ambient occlusion baked into vertex colors) and a 128px DDS
icon for player models, rendered by a software rasterizer from the client's
LDD brick primitives, and icons for cars and rockets assembled from their
modules per ModularBuildComponent/ModuleComponent. It serves them, with the
models' LXFML, over HTTP in the client's UGCC<dc>/3DOPTIMIZED and
IMAGE128DDS layout with .gz and .checksum files, and keeps its folder under
a size cap.
Processing state lives in ugc.is_optimized plus new processed_at,
process_attempts and process_error columns (and the same on
ugc_modular_build). ServiceType::UGC is appended. NifFile moves to dCommon
and records named node transforms for the modules' attach points.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Nothing in the server writes or reads a packet by hand any more, so the
helpers for doing so go:
- CBITSTREAM, CMSGHEADER, CINSTREAM, CINSTREAM_SKIP_HEADER, SEND_PACKET,
SEND_PACKET_BROADCAST and HEADER_SIZE leave dCommonVars.h;
- the free BitStreamUtils::WriteHeader (LUBitStream::WriteHeader writes the
same bytes) and the unused PacketUtils::SavePacket are deleted.
The last raw reads are replaced: WorldServer builds its input stream
directly, the master packet logs read the header with
LUBitStream::ReadHeader instead of peeking at packet->data[1] and [3], and
MessageInspector reads a sent game message's header with the new
NetGameMsg::ReadPacketHeader (the counterpart of WritePacket) instead of
memcmp/memcpy. packet->data[0] is still compared with RakNet's own
connection IDs.
The frozen oracles keep using the macros verbatim through the test-only
tests/dGameTests/LegacyPacketMacros.h; the HeaderSkip tests, which only
tested CINSTREAM_SKIP_HEADER, are removed.
docs/PacketArchitecture.md: "where we are" now describes the final state
and what still touches raw bytes (RakNet IDs, replica headers, behavior bit
streams), and a new section collects the known wire discrepancies found
during the conversion, with client addresses.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Every game message still written or read by hand is now a NetGameMsg with
Serialize and Deserialize, in per-domain files:
- MovementMessages: teleport, platforms (resync and its request), orient to
angle, node rotation lock, gravity scale, jetpack mode, control scheme,
respawn checkpoint, rails (set/start, ready, cancel, arrived), mount
inventory ID, dismount complete, possession ack, ghost reference override
and position, camera cycling (eCameraTargetCyclingMode moves here).
- ZoneMessages: player loaded (the old PLAYER_LOADED case), ready for
updates, player ready, restore to post load stats, server done loading,
invalid zone transfer list, zone summary display/dismissed, level
processing complete, object world state, and the localized announcement
WorldMigration wrote by hand.
- PlayerMessages: chat mode, GM level, LEGO score, currency, reputation,
GM invis, pickup currency, zone and player statistics, chat commands, bug
reports, verify ack.
- ObjectMessages: fire event client/server side, notify client
(zone) object, notify object, script network vars, failed preconditions,
terminate interaction, set name, request use, request server object info.
- QuickBuildMessages: notify state, enable, cancel.
- ActivityMessages gains match response/update/request, leaderboard request
and data, shooting gallery score/rotation/fire, activity state change.
- MissionMessages gains MissionDialogueCancelled (a no-op, as before).
The wire structs left in GameMessages.h move to their domains (tooltip and
emote to Effects, loot and item use to Inventory, model build to Building,
behavior sound to Property, skill sets to Skill) and gain the missing
direction. The dismount logic moves to PossessorComponent::OnDismountComplete.
Every inbound message is registered in the GameMessageHandler map; the
switch is gone, and GameMessages.cpp only holds the GameMsg/NetGameMsg base
code. Call sites build the structs (NotifyClientObject, TerminateInteraction,
Teleport, PlatformResync, FireEventClientSide, NotifyObject and
NotifyClientZoneObject get convenience constructors like PlayFXEffect).
Dead senders are dropped: SendSetShootingGalleryParams (no callers, field
order was a guess), SendTeamPickupItem (the struct already existed),
SendRequestActivitySummaryLeaderboardData (the struct covers it).
Verified with RemainingMessagesTests: every old Send* function is frozen
verbatim in Legacy/RemainingMessagesLegacy.h and compared byte for byte
(same bits, destination and broadcast flag) over grids of inputs; every old
Handle* read sequence is frozen as a Read* oracle and compared with the
struct's Deserialize; round trips, truncation and a golden packet.
PlayerLoaded (0x00dc36f0), SetGMLevel (0x00dd6230), MissionDialogueCancelled
(0x00d9cc10) and LocalizedAnnouncementServerToSingleClient (0x00f23c50)
were checked against the client. Behaviour notes: an inbound message that
fails to deserialize is dropped, so ParseChatMessage over MAX_MESSAGE_LENGTH
is dropped instead of truncated, and PLAYER_LOADED / READY_FOR_UPDATES /
MISSION_DIALOGUE_CANCELLED now read their (unused) client fields.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
bind_ip in sharedconfig.ini picks the local IPv4 address every server's
RakNet sockets listen on (auth, chat, master, world, the dashboard's
connection to master), separate from external_ip, the address players
are sent. Empty or 0.0.0.0 keeps listening on all interfaces; localhost
means 127.0.0.1. Anything that isn't an IPv4 address stops the server
with an error, and each server logs what it bound to.
Fixes#225
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Property worlds now give their property reputation for the time other people spend on it, which
fills the property lists and the news screen's Today's Top Properties. Visitors are counted per
account; the owner's account, accounts linked to it and staff don't count. A visit earns nothing
for the first property_reputation_min_visit seconds (WorldConfig's propertyReputationDelay), then
each active minute (the visitor moved) earns reputationPerMinute times a multiplier, for a capped
number of minutes per visit. Repeat visitors earn less the more recent days they already gave
reputation, and each visitor and each property have a daily cap. Every parameter is a setting;
what each account gave each property per day is kept in property_reputation_visits. The rules are
pure functions with unit tests.
Fixes#636Fixes#637
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Off unless property_rent_enabled is on. Each property world's rent comes from its PropertyTemplate
row (minimumPrice every rentDuration x durationType; Block Yard is free), unless the new Property
Rent dashboard page sets another price or period (property_rent_manage). Rent is taken from the
owner's coins shortly after their character loads, with a mail receipt; unpaid rent is mailed and,
after property_rent_grace_days, makes the property private until it is paid, like live. The
property management component refuses public or best friends privacy while rent is overdue and a
property world that loads overdue makes itself private. Property game messages are unchanged.
Fixes#943
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Every MASTER service packet is now an LUBitStream struct (docs/PacketArchitecture.md,
PR 14) and the master server's switch is a dispatch map (PacketDispatcher), as are the
master handlers of the world, chat and dashboard servers.
- dNet/MasterPackets.h: RequestZoneTransfer, RequestZoneTransferResponse, ServerInfo,
RequestSessionKey, SetSessionKey, SessionKeyResponse, NewSessionAlert, PlayerAdded /
PlayerRemoved, CreatePrivateZone, RequestPrivateZone (passwords still cut to 50
characters when read), WorldReady, WorldReadyInfo (WORLD_READY to the dashboard),
PrepZone, Shutdown, ShutdownResponse, WorldShutDown (SHUTDOWN_RESPONSE to the
dashboard), ShutdownUniverse, AffirmTransferRequest/Response, RequestServerList,
ServerListResponse, DashboardShutdown, ConfigReload, InstanceShutdown. The Send*
functions are gone; MasterPackets::SendToMaster(msg) and SendTo(sysAddr, msg) send a
struct.
- The dashboard and instance migration structs (PlayerAction, DataChanged, Dashboard
messages, MessageCapture, InstanceMigration) are LUBitStreams of the MASTER service now
and moved to dNet/master/, included by MasterPackets.h. Their payloads are unchanged;
master forwards them by re-serializing the struct instead of copying raw bytes.
- InstanceManager, ZoneInstanceManager, MigrationCoordinator, dServer (server info, zone
transfer response), auth (SET_SESSION_KEY), the world (session keys, player added and
removed, world ready, shutdown response, affirmations, prep zone, shutdown universe) and
the dashboard (server list, instance shutdown, config reload, announcements, player
actions, message capture) send and read structs.
- The login stamps are a `stamps` field of RequestZoneTransfer and
RequestZoneTransferResponse (read leniently as before: a message without them reads as
empty); master adds its stamps in the REQUEST_ZONE_TRANSFER handler and when it answers,
as it did.
- InstanceManager::GetInstanceBySysAddr takes a const address.
Verified: tests/dGameTests/dNetTests/Legacy/MasterPacketsLegacy.h is a verbatim copy of
the old writers and readers; MasterPacketsTests requires identical bytes for a grid of
inputs, checks the old readers read what the structs write, round trips and truncation,
hand written golden packets, that zone transfers without stamps still read, that the dashboard/migration structs write what
"header + Serialize" wrote, and that the dispatcher drops truncated packets. No wire
bytes changed.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
"client_location = ../client " or a value with a trailing space is a
common setup mistake that surfaces much later as an unrelated error (a
missing client folder, a failed database login). Keys and values are now
trimmed of spaces, tabs and line endings when the ini is read, which
also covers the \r of files saved with Windows line endings. Spaces
inside a value are kept, and lines with an empty key are ignored.
Verified with a new unit test that loads an ini with padded keys and
values.
Refs #1113
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Client-sent AMF (CONTROL_BEHAVIORS) was decoded without limits on the
associative part of arrays, on nesting depth, or on the total number of
values. Associative entries went into an unordered_map with the standard
unseeded string hash, so a client could pick colliding keys and make
insertion quadratic, and deeply nested arrays recursed until the stack
overflowed, crashing the world server.
- The associative map is now an ordered std::map (O(log n) whatever the
keys, deterministic serialization order).
- Each array allows at most 10,000 associative entries, the same as the
existing dense limit, which is now checked before anything is read.
- Arrays may nest at most 32 deep and one deserializer reads at most
100,000 values. Every limit throws, which the only caller already
catches and drops the message.
- Inserting a duplicate key keeps the last value and no longer returns a
reference to a value that was destroyed when the key already held null.
Verified with new unit tests for each limit (including a 100,000 deep
nesting that previously overflowed the stack) and the existing live
packet test, which still decodes.
Fixes#2035
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The NexusDashboard-parity dashboard (dDashboardServer) and everything built on it on the experimental branch:
accounts, characters, properties and moderation tools, permissions shared with in-game slash commands, economy
reports, World 3D and property 3D views with client scenery, scheduled events (features, vanity changes, live
events, announcements, restarts), vanity files and events, the CDClient browser, the message inspector with saved
captures, chat filter tools, community challenges, live ops, the AI moderator helper, and the server-side changes
they need.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
First step of moving hand written bitstream code to struct based
messages (see docs/PacketArchitecture.md). No wire changes.
- GameMsg is now only a server-internal event (delivered to handlers
registered with RegisterMsg); NetGameMsg is a wire message with
Send(sysAddr) (UNASSIGNED broadcasts), SendToClient(sysAddr) (one
client, never broadcasts), WritePacket, Serialize, Deserialize and
Handle. Mixing them up is now a compile error. NetGameMsgEvent<T> /
DeliverLocally carry a wire message to local handlers; loot drops,
pickup, the object debugger, GM invisibility and model RequestUse
use them. The GM invisibility message keeps its target, so its bytes
are unchanged.
- Behaviour change: GameMessageHandler logs and drops messages whose
Deserialize fails instead of handling them with default fields (the
4 messages already registered: RequestUse, RequestServerObjectInfo,
ShootingGalleryFire, PickupItem).
- LUBitStream (kept as on main) gets a virtual destructor (Mail deleted
derived packets through the base) and WritePacket, also used by
ChatPackets::SendRoutedMsg with identical bytes.
- BitStreamUtils::WriteOptional/ReadOptional for default-flag fields
and WriteLengthPrefixed/ReadLengthPrefixed for length prefixed
strings.
- Every message ID enumerator (MessageType::*, ServiceType, Mail's
wire enums) is pinned with static_asserts, so renumbering or removing
one fails to compile.
- Tests: dServerMock copies each sent packet (it kept a pointer to the
caller's destroyed BitStream); PacketTestUtils.h compares packets bit
for bit; helper tests use hand computed golden bytes and equality
with the hand written patterns they replace; compile-time checks
keep the wire/internal split in place.
- docs/PacketArchitecture.md: survey, target architecture,
conventions, verification method and migration plan.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* fix: security vulnerabilities
Tested that all functions related to the touched files work
will test sqlite on a CI build
* fix failing test
* ai feedback
* add buffer size checking
* use c_str
* dont log session key
* Try this for a mac definition
* be quiet apple
* LXFML SPLITTING
Included test file
* move base to global namespace
* wip need to test
* update last fixes
* update world sending bbb to be more efficient
* Address feedback form Emo in doscord
* Make LXFML class for robust and add more tests to edge cases and malformed data
* get rid of the string copy and make the deep clone have a recursive limit
* cleanup tests
* fix test file locations
* fix file path
* KISS
* add cmakelists
* fix typos
* NL @ EOF
* tabs and split out to func
* naming standard
* Rewrite AMF and behavior logic to use smart pointers, references, and string_views over raw pointers and std::string&
* fix m_BehaviorID initialization
* Fix BlockDefinition member naming
* remove redundant reset()s
* Replace UB forward template declarations with header include
* remove unneeded comment
* remove non-const ref getters
* simplify default behavior id initialization
* Fix invalidated use of Getter to set a value
* Update AddStripMessage.cpp - change push_back to emplace_back
* fix pointer to ref conversion mistake (should not have directly grabbed from the other branch commit)
* deref
* VERY experimental testing of forward declaration of templates - probably will revert
* Revert changes (as expected)
* Update BlockDefinition.h - remove extraneous semicolons
* Update BlockDefinition.h - remove linebreak
* Update Amf3.h member naming scheme
* fix duplicated code
* const iterators
* const pointers
* reviving this branch
* update read switch cases
* Add MSVC optimization flags
* test moving flags to json
* Update CMakePresets.json
* testing
* trying more variations on the flags
* third test
* testing if these even have any effect
* ditto
* final(?) try for now
* ONE MORE TIME
* trying 'init' flags instead
* export the compile commands so I can see if they're having any effect
* move out g++ O2 flag
* add Linux debug preset
* update CMake presets
* edit macos presets
* try adding build types back to mac
* macos refuses to work :(
* try using compiler flags for mac instead
* fix typo in windows preset
* build reorganization and experimental clang support
* temporarily remove macos build for testing purposes
* updated cmake workflows
* unexclude toolchain dir
* update .gitignore
* fix build directory issue
* edit build script
* update cmake configs
* attempted docker fix
* try zero-initializinng this struct to solve docker issue
* try fixing macos build
* one last MacOS try for the night
* try disabling an apple-specific build rule
* more fiddling with mac test builds
* try and narrow down the macos build failure cause
* try stripping out all the custom macos test logic again
* I'm really just throwing everything to the wall and seeing what sticks
* more macos tinkering
* implib
* try manual link directory specification
* save me
* aaaaaaaaa
* paths paths paths
* Revert "paths paths paths"
This reverts commit 9a7d86aa6c.
* Revert "aaaaaaaaa"
This reverts commit 338279c396.
* Revert "save me"
This reverts commit bd73aa21a9.
* Revert "try manual link directory specification"
This reverts commit 0c2d40632e.
* Revert "implib"
This reverts commit d41349d6ed.
* Revert "more macos tinkering"
This reverts commit 829ec35b57.
* Revert "I'm really just throwing everything to the wall and seeing what sticks"
This reverts commit 1a05b027fe.
* Revert "try stripping out all the custom macos test logic again"
This reverts commit cc15a26ce8.
* Revert "try and narrow down the macos build failure cause"
This reverts commit 5fd86833fa.
* Revert "more fiddling with mac test builds"
This reverts commit 0f843c02c9.
* Revert "try disabling an apple-specific build rule"
This reverts commit 45ec66e976.
* back to debug messages
* see if this re-breaks mac
* are these messages actually somehow fixing the issue?
* was not actually fixed
* add debug messages (again)
* debug try 2
* change runtime output dir
* rename gcc to gnu
* expand cmake presets
* fix preset
* change defaults
* altered cmake configuration scripts
* disable /WX on MSVC
* update github actions
* update build presets
* change gnu and clang build directories to enable consistent artifact generation
* add RelWithDebInfo presets and move -Werror flag into presets.json
* use DLU_CONFIG_DIR envvar
* CMakePresets indentation
* temp fix for MSVC debug builds
* nit
* GeneralUtils const-correctness and minor fixes
* use copy instead of reference for char iteration loops
* fix typo and reorganize some functions
* WIP, but working
* Scaffolding
* testing and making it compile again
* move all commands to functions
* renaming to compile
* fix failing tests
idk how these werent failing before. Seems to have been magic.
* move commandss into their namespace
make help command useful
fix mac error
TODO: remove the multiple not founds/ rework the structure to split into help and handling
* Just need to fill out the fields, but it's all there templated
* Add all aliases, register missing commands
* All help text
* remove test logs
* improvements
pass through added code for optimizations and cleanup as well as reduce the amount of scoping for readability and maintainability
* Update SlashCommandHandler.cpp
* only save command if it is a GM command
* simplify if checks
* remove broken delimiter
* Update SlashCommandHandler.cpp
* Update SlashCommandHandler.cpp
---------
Co-authored-by: David Markowitz <EmosewaMC@gmail.com>
* chore: supress warnings on external library headers and actually get rid of the last old-style casts
* remove commented out section I forgot
* update cmake required version to 3.25 unless we can find another way to do this
* update readme
* Update CMakeLists.txt
* fix: more include changes
* fix: remove dZoneManager from global include
* fix: dDatabase
* fix: dCommon
* fix: object libs
* fix: rebase
* fix: bcrypt
* wip: try simplified connector build
* fix: update dockerfile
* fix: mariadb C/C++ on apple
* feat: Move scripts to CMAKE_MODULE_PATH
* fix: dPropertyBehaviors
* fix: macos?
* fix: Dockerfile
* fix: macos?
* fix: macos?
* fix: macos?
* fix: macos?
* fix: macos?
* try: install_name_tool
* fix not building on unix
* fix include paths
* Remove code changes
Will fix in another PR.
* format pass
remove 2 more included directories.
remove commented out code
add status to messages
* comments and format
surround include directories with quotes
remove commented out code
remove debug messages
* Update CMakeLists.txt
---------
Co-authored-by: David Markowitz <EmosewaMC@gmail.com>
Co-authored-by: David Markowitz <39972741+EmosewaMC@users.noreply.github.com>
* allow usage of NiPoint3 and NiQuaternion in constexpr context
* removed .cpp files entirely
* moving circular dependency circumvention stuff to an .inl file
* real world usage!!!!!
* reverting weird branch cross-pollination
* removing more weird branch cross-pollination
* remove comment
* added inverse header guard to inl file
* Update NiPoint3.inl
* trying different constructor syntax
* reorganize into .inl files for readability
* uncomment include
* moved non-constexpr definitions to cpp file
* moved static definitions back to inl files
* testing fix
* moved constants into seperate namespace
* Undo change in build-and-test.yml
* nodiscard
* add enum stringification functionality from third party source
* squashed commit
* Macros: Add test and improve speed
Space macros out
utilize cache locality
ensure no lost functionality
* moved stringify code to dCommon
* Rename #defines in stringify enum tests
* Revert "moved stringify code to dCommon"
This reverts commit 33fa5f8d2f.
* improve macro functionality
change function handle
formatting and function definition tweaks
* typo fixes
* moved code to dCommon/dEnums and tests to dCommonTests/dEnumsTests
* initial magic_enums alternate implementation of enum stringification
* deleted unused tests
* reverted compile flag oopsy and fixed output types
* fixed testing suite
* test formatting improvement
* formatting again :(
* added gm string to "aborting gm!" message
* Push my suggestion for CI tests.
* updated magic enum test
* fix test variable type
* added gm test
* making sure magic_enum is on a release branch
* tidying up console outputs
* re-implemented enum array access for performance
* now it is bugged :(
* nvm, working
* helping out the snowflake compilers
* changed return type too
* optimization too
* formatting too I guess because why not
* being even more painfully specific
* Update WorldServer.cpp to match emo's feedback
* Update MagicEnumTests.cpp to use srand(time(NULL))
* Update eGameMessageType.h - formatting
* Trying to fix the crash but can't actually compile the code to check on my own rn
* Update WorldServer.cpp - third try at this
* Update MagicEnumTests.cpp - use better macro definitions
* Update MagicEnumTests.cpp - c string comparison fix
* addressing all but the cmake feedback
* fixed cmake to the best of my very limited ability
* added tests to verify magic enum arrays are pre-sorted
* updated
---------
Co-authored-by: David Markowitz <EmosewaMC@gmail.com>
Co-authored-by: Jettford <mrjettbradford@gmail.com>
* feat: add configurable feature and versions
to allow for easily swithing it out to enable features in the client for funsies
tested that this doesn't break anything and added test
* cleanup
* Logger: Rename logger to Logger from dLogger
* Logger: Add compile time filename
Fix include issues
Add writers
Add macros
Add macro to force compilation
* Logger: Replace calls with macros
Allows for filename and line number to be logged
* Logger: Add comments
and remove extra define
Logger: Replace with unique_ptr
also flush console at exit. regular file writer should be flushed on file close.
Logger: Remove constexpr on variable
* Logger: Simplify code
* Update Logger.cpp
* chore: cleanup LU(W)string writing
and add methods for reading
remove redunent "packet" from packet reading helpers
move write header to bitstreamutils since it's not packet related
add tests for reading/writing LU(W)Strings
* remove un-needed function defintions in header
* make reading and writing more efficient
* p
p
* quotes
* remove unneeded default
---------
Co-authored-by: David Markowitz <39972741+EmosewaMC@users.noreply.github.com>
* Update AMFDeserializeTests.cpp
Redo Amf3 functionality
Overhaul the whole thing due to it being outdated and clunky to use
Sometimes you want to keep the value
Update AMFDeserializeTests.cpp
* Fix enum and constructors
Correct enum to a class and simplify names.
Add a proper default constructor
* Update MasterServer.cpp
* Fix bugs and add more tests
* Refactor: AMF with templates in mind
- Remove hard coded bodge
- Use templates and generics to allow for much looser typing and strengthened implementation
- Move code into header only implementation for portability
Refactor: Convert AMF implementation to templates
- Rip out previous implementation
- Remove all extraneous terminology
- Add proper overloads for all types of inserts
- Fix up tests and codebase
* Fix compiler errors
* Check for null first
* Add specialization for const char*
* Update tests for new template specialization
* Switch BitStream to use references
* Rename files
* Check enum bounds on deserialize
I did this on a phone
* Add tests and cleanup LDF header
Also implements a speedup by using overloaded operators to put numbers directly to a stream as opposed to doing to_string first.
Stage 2 of re-write
Reduce scoping
Add further optimizations
Fix more edge cases
Split out tests to many smaller ones
Use EXPECT_NO_THROW
Add edge cases to test
Added these first with the before to confirm they failed, and now will be adding the remaining fixes needed to make the tests pass.
Add edge case testing for LDF strings
Add further tests
Use characters instead of char*
Update AMFDeserializeTests.cpp
Add null tests
* Add Test Fixture for dCommon
* Add speed test
* Convert to using string_view
* Add explanation on early return
* Remove "testing" code
Implement GTest as a testing infrastructure.
Make windows output binaries to the build folder instead of the release type folder (potentially issue further down the line)
Add a simple unit test for DestroyableComponent
