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WalkthroughChangesWebSocket shutdown now sends close code WebSocket shutdown lifecycle
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Updated 1:41 PM PT - Aug 27th, 2026
❌ @robobun, your commit 02df182 has 3 failures in
🧪 To try this PR locally: bunx bun-pr 34961That installs a local version of the PR into your bun-34961 --bun |
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Reproduced all three behaviours on
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Found 2 issues this PR may fix:
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Inline comments:
In `@src/runtime/server/mod.rs`:
- Around line 1696-1702: Trim the newly added explanatory comments in
end_all_websockets_going_away and terminate_app to three lines or fewer each.
Preserve only the essential re-entrancy and ordering invariants, including the
guard spanning the drain and stop() performing the idle pass, without adding
broader documentation.
In `@test/js/bun/http/bun-server.test.ts`:
- Around line 879-883: Shorten the three explanatory comment blocks near the
websocket test and the referenced sections to no more than three lines each.
Preserve only the essential test intent and behavior, including GC survival
while connected and collectability after stop where relevant; do not alter the
tests.
In `@test/js/bun/websocket/websocket-server.test.ts`:
- Around line 1745-1748: Update the serverCodes sorting in the assertion to use
an explicit numeric comparator instead of the default lexicographic sort, while
preserving the expected close-code values and pendingWebSockets check.
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packages/bun-uws/src/App.hsrc/runtime/server/mod.rssrc/runtime/server/server_body.rssrc/uws_sys/App.rssrc/uws_sys/libuwsockets.cpptest/js/bun/http/bun-server.test.tstest/js/bun/websocket/websocket-server.test.tstest/js/node/http/node-http-with-ws.test.ts
…#35130) ## Problem The `server.stop(false)` drain promise resolved while keep-alive HTTP connections were still open and still serving. ```js // bun stopcensus.mjs [idle|inflight] import net from "node:net"; const mode = process.argv[2] || "idle"; const server = Bun.serve({ port: 0, hostname: "127.0.0.1", async fetch(req) { const p = new URL(req.url).pathname; if (p === "/slow") await Bun.sleep(600); return new Response("resp:" + p + ";"); } }); const c = net.connect(server.port, "127.0.0.1"); // ... one GET, then await server.stop(false), then a second GET on the same socket ``` `idle` → `stopResolvedAfterMs: 0, connFinAt: null, servedAfterResolve: 1`; `inflight` → resolves at response-finish (~450 ms), connection open, `/second` served. Deterministic on 1.4.0. Separately, `server.stop(true)` after an earlier `server.stop(false)` was a silent no-op: `stop_from_js` only entered `stop()` while `has_listener()`, and a prior graceful stop had already taken the listener. ## Cause `deinit_if_we_can` (and the `get_all_closed_promise` early-return, and the `stop_listening` unref gate) tested `pending_requests == 0 && !has_listener() && !has_active_web_sockets()`. Idle keep-alive HTTP connections are not in any of those terms; the predicate had no connection count, so it was satisfied while sockets were open and uWS kept routing requests on them. ## Fix - New `active_connection_count: Cell<u32>` on `NewServer`, fed by a uWS `filter` registered in `listen()` (fires `+1` on accept / post-TLS-handshake, `-1` from `HttpContext::onClose`). On WebSocket upgrade the socket is `us_socket_adopt`-ed out of the HTTP group and `HttpContext::onClose` never fires for it, so `note_websocket_opened` moves the count to the existing WebSocket tally. - The drain predicate, the `get_all_closed_promise` early-return and the `stop_listening` unref gate now include `!has_active_connections()`. The early-return also gains `!has_active_web_sockets()`: after an upgrade the connection count is 0, so on a websocket-only server this term is what keeps a repeat `stop()` call from returning a fresh resolved promise while the stored one is still pending. `stop(false)` does **not** close existing connections (per the review on the previous revision of this PR); the promise waits for them to close via `idleTimeout`, client disconnect, `server.closeIdleConnections()` or `server.stop(true)`. - `stop_from_js` / `dispose_from_js` enter `stop()` for an abrupt stop whenever the app has not yet been terminated, and `stop_listening` performs the `app.close()` teardown in that state, so `stop(true)` after `stop(false)` force-closes the surviving connections. ## Memory safety The deferred `js_value` downgrade is also a use-after-free fix. On `main`, once `pending_requests` hits 0 after a graceful `stop()`, `deinit_if_we_can` downgrades the wrapper to `Weak` while surviving keep-alive connections can still dispatch. The wrapper's slots are the only GC root of the configured handlers, and `JsRef::try_get()` returns the raw `JSValue` of a `Weak` ref with no liveness check, so after a GC pass a late request on such a connection calls swept cells: - release build: a freshly allocated object can reuse the swept handler cell and be invoked as the fetch handler. When the occupant is the fetch handler of another `Bun.serve` instance created after the stop, a request on the stopped server's surviving keep-alive connection is answered by that other instance's handler, crossing any in-process boundary between listeners (public vs admin, per-tenant servers). Other occupants surface as `error: Expected a Response object, but received '6'` (also `''` / `undefined`), response bodies resolving to unrelated objects, or a segfault - debug/ASAN build: UBSan `Structure.h: member call on null pointer of type 'JSC::ClassInfo'` in `Bun__JSValue__call`, reached from `NewServer::on_request` via `us_internal_dispatch_ready_poll` (a loop dispatch against the collected wrapper, not a finalizer-ordering problem) With the connection count in the predicate, the wrapper stays `Strong` until the last connection is gone, so a late dispatch always sees live cells. A standalone stress driver that creates fresh `Bun.serve` instances after every graceful stop confirms this: on unfixed builds it produces corrupted responses in release (about 1 per 120 stops over 72k rounds) and swept-cell sanitizer crashes under ASAN within 500 rounds, while this branch runs 1,000+ rounds under ASAN with zero reports. ## Verification New `server.stop() drain promise counts open connections` block in `test/js/bun/http/bun-server.test.ts`: - `idle keep-alive connection holds the promise until the client closes` / `in-flight request's connection holds the promise past response end`: fail-before `resolvedEarly: true, resolvedWhileOpen: true`; after `false, false` and the promise resolves once the client destroys the socket. - `stop(true) after stop(false) force-closes the surviving connection`: fail-before `closed: false`; after `closed: true`. New `request on a connection surviving graceful stop() never reaches a collected handler` stress test: parks pooled keep-alive connections across `stop()`, drops the server binding, churns the heap and forces GC, then sends late requests on the surviving connections. Rounds alternate between a plain `fetch` handler and a `routes:` param-route server, because the route dispatch reads the wrapper's `ServerRouteList` cell, a second collected-cell site (UBSan member call on null `TrailingArray<...ServerRouteList::IdentifierRange>` in `paramsObjectForRoute`, reached from `on_user_route_request`). Fails consistently on `main`: 6/6 with the release build (wrong bodies, responses from an already-collected server, segfaults) and 9/9 with the debug ASAN build across both shapes of the test, hitting both UBSan sites. Passes repeatedly with this PR (~35 s under ASAN, ~8 s release). The `late keep-alive WebSocket upgrade after stop()` test is updated: the wrapper downgrade is now deferred while the connection is open, so a pipelined upgrade on that connection reaches a live handler and `server.upgrade()` succeeds (previously it was refused because `handler.server` had been cleared). ``` bun bd test test/js/bun/http/bun-server.test.ts -t "drain promise counts open connections" # 3 pass USE_SYSTEM_BUN=1 bun test <same> # 3 fail ``` `bun-server.test.ts`, `serve.test.ts`, `node-http.test.ts` and `websocket-server.test.ts` are unchanged apart from the usual environment-only failures that also fail on `main`. `node:http`'s `server.close()` calls `closeIdleConnections()` itself, so its observable behaviour is the same before and after. The `stop(true)`-after-`stop(false)` gate overlaps #33662 and #34961; this PR carries it because the connection-count term makes it the only way to force the promise through when a client keeps the socket open. <!-- robobun:evidence:begin --> --- **no test proof** · iteration 24 · Platform-specific test(s) that do not run on this machine. Deferring to CI, which covers all platforms: test/js/bun/http/bun-server.test.ts <!-- robobun:evidence:end -->
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Rebase note: d4de65e (#39893) changed the "server stays alive while a websocket is connected" test that this PR also rewrites. The client WebSocket and its handlers now have to be created outside the scope that holds |
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Rebased on current main (1f068d1, one commit). Main has since landed two of the three pieces this PR carried: Four existing |
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Inline comments:
In `@test/js/bun/websocket/websocket-server.test.ts`:
- Around line 1917-1962: The two WebSocket shutdown tests should validate the
close reason as well as the close codes. In both stop(false) and stop(true)
assertions, include serverReason from s.reason and clientReason from c.reason,
expecting “Server closed” for each while preserving the existing expectations.
In `@test/js/node/http/node-http-with-ws.test.ts`:
- Around line 185-190: Extend the server.close() test after verifying the
existing client remains open by creating a second WebSocket client and awaiting
its error outcome; fail the test if it opens, while keeping the original
upgraded client open until this rejection assertion completes.
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packages/bun-uws/src/App.hsrc/runtime/server/mod.rssrc/uws_sys/App.rssrc/uws_sys/libuwsockets.cpptest/js/bun/http/bun-server.test.tstest/js/bun/websocket/websocket-server.test.tstest/js/node/http/node-http-with-ws.test.ts
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I reviewed this PR and the automated bug-hunting pass found no issues. Because it changes the user-facing semantics of Bun.serve().stop() (open WebSockets are now ended with 1001 on graceful stop) and touches re-entrance-guarded native teardown paths across uWS C++, FFI, and stop_listening, a human sign-off on the API decision and the guard placement would be worthwhile.
What was reviewed:
endAllWebSocketssnapshot walk in App.h —us_socket_closerelinks intoclosed_head(freed at loop_post), sous_socket_is_closedon a snapshotted pointer is safe within the tick;end()no-ops onisShuttingDown.deinit_runningsave/restore aroundend_all_websockets— matches the existingapp.close()guard; nestedstop(true)from a close handler is exercised by the new "close handler terminates another" test.- node:http exemption via
config.is_node_http_server— covered by the newnode-http-with-wstest (upgraded socket stays open, listener stops). - Four rewritten
bun-server.test.tscases — original assertions preserved; upgrade held infetch()until afterstop()to reach the same stopped-with-live-ws state.
Extended reasoning...
Overview
The PR makes Bun.serve().stop() (both graceful and abrupt) send a WebSocket close frame with code 1001 "Server closed" to every open WebSocket before tearing down, so await server.stop() resolves and peers observe a clean close instead of 1006. It adds TemplatedApp::endAllWebSockets in packages/bun-uws/src/App.h, a C shim in libuwsockets.cpp, a Rust FFI wrapper in src/uws_sys/App.rs, and a new end_all_websockets_going_away helper called from three arms of stop_listening in src/runtime/server/mod.rs. node:http servers are exempted via config.is_node_http_server to preserve Node's Server#close() semantics. Five new tests in websocket-server.test.ts, one in node-http-with-ws.test.ts, and four rewritten setups in bun-server.test.ts.
Security risks
None identified. No auth, crypto, or untrusted-input parsing is touched. The change is server-initiated shutdown behavior on sockets the server already owns.
Level of scrutiny
High. This is a user-facing API behavior change: server.stop(false) previously left open WebSockets untouched; now it ends them. That is a product/API decision (arguably the right one — it matches the stop() promise contract and #25722 — but it changes what existing callers observe). The implementation also runs user JS close handlers synchronously under a live &mut NewServer frame, guarded by deinit_running.replace(true)/set(prev); getting that guard placement wrong is a re-entrance/UAF hazard. The C++ snapshot walk in endAllWebSockets iterates raw us_socket_t* while user callbacks can terminate() other sockets in the list.
Other factors
- Four pre-existing tests were rewritten (upgrade held in
fetch()until afterstop()) because their setup relied on the old "stop() leaves WebSockets open" behavior. The rewrites keep the original assertions, and one of them was independently touched by #39893 on main with a Windows-specific scoping constraint that the rebase note calls out — worth a human eye to confirm the merged shape still satisfies both. - Prior review rounds (my earlier inline findings on the node:http regression, dead
closeCodefield, and let-else style; CodeRabbit's comment-length and assertion-strength nits; the comment-cop bot) were all addressed and resolved. - Test coverage is thorough: graceful stop, abrupt stop, abrupt-after-graceful, already-closing socket, and the adversarial "close handler terminates other sockets and re-enters stop(true)" case that exercises both the snapshot and the re-entrance guard.
- The
is_node_http_servergate reads from config (set once at construction), not from runtime state, so there's no TOCTOU concern.
Given the API-semantics change and the memory-safety-sensitive native paths, deferring to a human maintainer for final sign-off.
### Problem - `server.upgrade()` after an `await` on a `Connection: close` or HTTP/1.0 request sends the 101, then closes the socket: `open()` runs on a dead socket, `close()` never runs, the `ServerWebSocket` leaks. Same after a graceful `server.stop()` during the `await`. - node:http (`ws` `handleUpgrade()` from a later task, HTTP/1.0): `AddressSanitizer: heap-use-after-free ... in us_socket_is_closed`. - Cause: `HttpResponse::upgrade()` ended the 101 through `internalEnd()`, which, uncorked, runs the close gate, then built the WebSocket over the closed socket. ### Fix - `upgrade()` ends the 101 with a new `endUpgradeHandshake()` (`HttpResponse.h:119`): headers terminated, response marked done, no close gate, no uncork. `internalEnd()` loses its `keepCorked` parameter, which only `upgrade()` set. - Correct because the 101 switches protocols: `Connection: close`, HTTP/1.0 and close-when-idle describe the HTTP connection, which ends here, not the WebSocket that takes over the socket. The synchronous path and node's `ws` already do. - #37447 edits the same hunk and asserts the opposite outcome. This lands first, then #37447 drops its post-`internalEnd` re-check and two `Connection: close` tests (Notes). - Verified: `test/js/bun/websocket/websocket-server.test.ts` (4 new, 3 fail on main), `test/js/first_party/ws/ws.test.ts` (1 new, use-after-free on main), plus neighbouring suites (Notes). ### Background - `HttpContext::onData` corks the socket while it parses. A synchronous `server.upgrade()` writes into it. After an `await`, writes reach the kernel at once. - The close gate (`closeIfDoneAndMarked`) shuts an HTTP connection down once the response is complete and flushed and `shouldCloseConnection()` holds: `Connection: close`, HTTP/1.0 (`HttpContext.h:431`) or `HTTP_CLOSE_WHEN_IDLE` (graceful `server.stop()`). - `upgrade()` destructs `HttpResponseData` and adopts the socket into the WebSocket context, which then owns it. <details><summary>Notes</summary> Repro against the released bun (1.4.0): a raw client sends `GET / HTTP/1.1` with `Upgrade: websocket`, `Connection: close` and a valid key to a server whose `fetch()` awaits `setImmediate` before `server.upgrade(req)`: ``` status line: HTTP/1.1 101 Switching Protocols outcome: socket closed by the server events: ["ws open", "upgrade returned true"] // never "ws close" ``` `GET / HTTP/1.0` with `Connection: Upgrade` gives the same. With `Connection: Upgrade` and HTTP/1.1 the frame sent from `open()` arrives. Why the gate fired only here: `internalEnd()` marks the response done and, uncorked, runs `closeIfDoneAndMarked()`. The status line and headers had already reached the kernel, so `hasFullyDrained()` was true. Corked (the synchronous path) the branch is skipped, and `onData` returns through its `upgradedWebSocket` arm, which has no gate. The `Connection: close` and HTTP/1.0 arms are as old as uWS. `HTTP_CLOSE_WHEN_IDLE` arrived in 1.4.0 with #37074, so an upgrade that completes after a graceful `server.stop()` worked in 1.3.x. What happened after the close on main: `us_socket_adopt()` returns a closed socket unchanged, so `upgrade()` read the destructed `HttpResponseData`, placed `WebSocketData` over the closed socket's ext, and ran `open()`. The WebSocket never gets a close event because the HTTP context's `onClose` already ran, so the `ServerWebSocket`'s strong self-ref is never downgraded. `endUpgradeHandshake()` does what `internalEnd({nullptr, 0}, 0, false, false, false, true)` did for the 101 (`writeStatus` was a no-op, the status was written, and the body is empty) minus the gate and the HTTP `resetTimeout()`, which `upgrade()` replaces with the WebSocket timeouts a few lines later. The 101 bytes on the wire are unchanged, Date header included. #37447 (open): it makes `us_socket_adopt()` return NULL for a closed or shut down socket, adds an up-front closed/shut-down check to `upgrade()`, re-checks after `internalEnd()` and returns `nullptr` when the gate closed the socket, and makes the Rust callers free the `ServerWebSocket` on `nullptr`. Its tests "returns false for an async upgrade of a connection marked Connection: close" and "releases the ServerWebSocket of a refused upgrade" assert `upgradeResult: false` for the bytes this PR's tests assert `true` for, with the client left holding a 101. With this PR the gate never runs during `upgrade()`, so the post-`internalEnd` re-check has nothing to catch. The up-front check, the NULL return and the caller handling stay useful for a socket that is already closed or shut down when `upgrade()` runs (a possible peer-FIN path on node:http), so the order is: this PR, then #37447 rebased without the re-check and the two tests. Graceful stop: #34961 (open) rewrites several existing tests to hold the upgrade in `fetch()` until after `server.stop()` and states that an in-flight request may still upgrade after a graceful stop. That is the async path this PR fixes, so the "graceful server.stop() during the await" case pins the behavior #34961 relies on. node:http: a request with `Connection: close` and no `Upgrade` token is a normal request (no `'upgrade'` event, same as node). `Connection: close, Upgrade` does not set the close flag (uWS flags a `Connection` value of exactly 5 bytes), so HTTP/1.0 is the only node:http handshake that reached the gate. That one crashed the unfixed debug build under ASAN. Out of scope, left as they are: whether `server.upgrade()` should refuse an HTTP/1.0 or `Connection: close` handshake (RFC 6455 4.2.1). The synchronous path accepts both today, and #35870 (open) proposes the `Connection: Upgrade` token check. If that lands first, the two `Connection: close` cases in `websocket-server.test.ts` need a rejected-handshake expectation instead. The HTTP/1.0 and graceful-stop cases are unaffected. A peer FIN before the upgrade: Bun.serve closes the socket at once (`HttpContext::onEnd`), so `server.upgrade()` returns `false` through `is_aborted_or_ended()`. node:http marks the socket unreadable and `ws`'s `completeUpgrade()` destroys it before the native upgrade (#39642). Local failures unrelated to this change: the `ServerWebSocket > send()` neighbours of the 30 s benchmark time out when the whole file runs concurrently on the debug build (they pass alone), and `bun-server.test.ts` has 4 tests that need `localhost`, IPv6 or outbound network in this container. </details> <!-- robobun:evidence:begin --> --- **no test proof** · iteration 0 · platform-specific test(s) that do not run on this machine, deferring to CI, which covers all platforms: test/js/bun/websocket/websocket-server.test.ts <!-- robobun:evidence:end -->
server.stop() was blind to open WebSockets: - stop(false) only closed the listener (and, since #37074, idle HTTP connections). Open WebSockets stayed connected and kept serving traffic, so the returned promise never resolved while one was open. - stop(true) tore WebSockets down with a raw socket close, so the server close handler and the peer both observed 1006 (abnormal, no close frame) instead of 1001 Going Away. Add TemplatedApp::endAllWebSockets(code, reason), which snapshots every WebSocket group and calls WebSocket::end() on each open socket (close frame, close handler, FIN), exposed to Rust as NewApp::end_all_websockets. stop_listening() now calls it with 1001 on every stop path (graceful, abrupt, and abrupt after an earlier graceful stop) before closing the listener or the app, under the deinit_running re-entrance guard. node:http servers are exempt: Node's Server#close() leaves upgraded sockets to the user, and the ws shim drains its own clients set. Tests that relied on a graceful stop() leaving an already-open WebSocket alive now reach that state by holding the upgrade in fetch() until after stop(), which keeps their original assertions intact.
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Rebased onto main (02df182). One textual conflict in Re-ran locally on the rebased build: the new |
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CI on 02df182 (build 106983): 178/181 lanes pass. The two red lanes are failures that are also on main and do not touch this diff: Every test this PR adds or touches ( |
robobun
changed the title
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This PR should not merge as it stands. I marked it as a draft. The
Four tests in The Options:
I suggest option 1, because it matches the review on #35130. I will not change the code until a maintainer picks one. Two more corrections. The issue link is now |
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Part of #25722
Problem
server.stop(true)closes WebSockets with a raw socket close (app.close(),us_socket_group_close_all). The serverclosehandler and the peer both see1006and no close frame, not1001Going Away.server.stop(false)leaves open WebSockets untouched, soawait server.stop()stays pending while one is connected. This is the documented behaviour. This PR changes it.Fix
TemplatedApp::endAllWebSockets(code, reason)(packages/bun-uws/src/App.h). It snapshots every WebSocket group, then callsWebSocket::end()on each open socket: close frame, close handler, FIN.stop_listening()calls it with1001 "Server closed"on every stop path, under thedeinit_runningguard, so a close handler that callsserver.stop(true)does not re-enter.config.is_node_http_server). Node'sServer#close()leaves upgraded sockets to the user.test/js/bun/websocket/websocket-server.test.ts("server.stop() with open WebSockets"),test/js/node/http/node-http-with-ws.test.ts. Also ranbun-server.test.ts,serve.test.ts,serve-http2*.test.ts.Background
ws()route.app.close()closes each fd and reports1006. OnlyWebSocket::end()performs the RFC 6455 closing handshake.deinit_runningis a re-entrance flag.deinit_if_we_canandstop_from_jsno-op while it is set, because the drain runs user close handlers under a live&mut NewServer.Downsides
stop(false)half goes against the stated contract.docs/runtime/http/server.mdx("stop()allows in-flight requests and WebSocket connections to complete"),packages/bun-types/serve.d.ts, Bun.serve: close idle connections on graceful stop(), declare closeIdleConnections() #37074 ("open WebSocket: untouched") and the review on Bun.serve: gate the graceful stop() drain promise on open connections #35130 ("by design it should not be closing existing connections") all say gracefulstop()leaves them open. A program that stops listening and lets sessions finish loses those sessions. Neither text is updated here.stop(true)the serverclosehandler receives1001/"Server closed"where it received1006. Code that matches on1006at shutdown sees a different code.stop(false)is not ended and keeps the stop promise pending, as on main.Notes
Contract evidence for the
stop(false)half, found after the PR was opened:docs/runtime/http/server.mdx:331,packages/bun-types/serve.d.ts:935, the behaviour table in #37074 (open WebSocket | untouched (drains on its own, as before)), and the changes-requested review on #35130 (stop() / stop(false) should be graceful; by design it should not be closing existing connections). The fourbun-server.test.tscases listed below were written against that contract. Options: keep only thestop(true)half here. Or keep both, and change the docs sentence, the type comment and the in-flight-upgrade gap in this PR, with a maintainer's yes. Or make it opt-in, which adds API surface. The issue link at the top is nowPart of, not a closing keyword: that issue asks for close frames at process end (--watch, Ctrl+C) with nostop()call, which this PR does not do. Cost perstop(): one counter check with no open WebSocket, onestd::vectorof the open sockets otherwise, nothing on the request or message path. Binary size delta: not measured.Repro (all three cases deterministic on stock 1.4.0 and asan main):
Rebase on current main (2026-07-22). Main had since landed the other two pieces this PR originally carried, so they are gone from the diff:
stop(true)afterstop(false)now tears the app down (already_terminatedarm instop_listening,!deinit_runninggate instop_from_js/dispose_from_js), andget_all_closed_promisegoes throughis_closed(), which already counts WebSockets. What remains is the WebSocket drain itself, the node:http exemption, and the tests. Thestop(true)afterstop(false)test is kept because the WebSocket still has to get1001on that path.Four existing tests in
bun-server.test.ts(websocket-only server: a second stop() returns the still-pending promise,server wrapper survives GC while a websocket is connected after stop(),server stays alive while a websocket is connected, then collects after close,error handler survives ws.close()+throw ...) set up "stopped server with a live WebSocket" by opening the socket and then callingstop(). That ordering no longer produces the state. They now hold the upgrade infetch()until afterstop()(an in-flight request may still upgrade after a graceful stop), which reaches the same state and keeps every original assertion. A socket that upgrades in that window is ended with1001by a laterstop(true).Environment-only failures seen locally, identical with the fix stashed: 8
ServerWebSockettests inwebsocket-server.test.tstime out next to the(benchmark)case on this debug+ASAN box, 4 inserve.test.ts(IPv6, root port, egress), 2 inweb/websocket(postman-echo).Overlaps #33662 (that PR covers the
stop(true)afterstop(false)gate, which main has since fixed independently).no test proof · iteration 3 · platform-specific test(s) that do not run on this machine, deferring to CI, which covers all platforms: test/js/bun/websocket/websocket-server.test.ts, test/js/bun/http/bun-server.test.ts