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test: run the issue 13696 http.request regression test in-process - #41422
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Each of the three tests spawned a bun child that loaded node:http and node:net, which takes about two seconds per child in a debug build. The server and the client now run inside the test process, the tests run concurrently, and the server paces its body chunks on the client's receipt of the previous chunk instead of a fixed sleep. The tests now also assert the raw request line, the chunked body frame from the single write(), and that req.writableEnded is still false when the response has ended.
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Good catch on the marker. The server now waits for the whole chunked frame (size line, payload, trailing CRLF) before it resolves, so the |
WalkthroughChangesThe regression tests now use in-process ChangesHTTP streaming regression tests
Merge Risk: 🟡 Moderate · up to The rewritten HTTP regression tests may fail intermittently from socket errors or fragmented response data, and the listener call may fail TypeScript checking. These issues should be corrected before merge so the faster in-process coverage remains reliable. 🚥 Pre-merge checks | ✅ 4✅ Passed checks (4 passed)
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Actionable comments posted: 3
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Inline comments:
In `@test/regression/issue/13696.test.ts`:
- Around line 45-60: Add an empty "error" listener at the start of each
in-process server connection handler to absorb expected socket errors: the TCP
and Unix socket handlers in test/regression/issue/13696.test.ts lines 45-60, and
the flushHeaders handler in lines 132-136. No other changes are needed.
- Around line 87-92: Update the response data handler to accumulate incoming
chunks in a buffer and emit events only for complete newline-terminated lines,
retaining any trailing partial line for the next data event. Resolve
chunkReceived only after processing a complete line so the test’s pacing
invariant is preserved.
- Line 61: Update the server setup around server.listen to use explicit
branches: call server.listen with socketPath when it is present, otherwise call
it with port 0 and host 127.0.0.1. Remove the conditional spread so TypeScript
can resolve the overloaded method signatures.
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test/regression/issue/13696.test.ts
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Absorb socket errors on the server side, buffer response data to whole lines before counting a chunk, and call server.listen with explicit arguments per socket mode.
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Updated 4:11 AM PT - Sep 5th, 2026
❌ @robobun, your commit 7131634 has 1 failures in 🧪 To try this PR locally: bunx bun-pr 41422That installs a local version of the PR into your bun-41422 --bun |
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LGTM — the earlier framing concern is addressed (readUntil now waits for the full chunkedFrame including the trailing CRLF, so the toEndWith assertion is race-free), and the follow-up commit hardened the server sockets against the reset from req.destroy().
Checked: the chunkReceived handshake is sound (server awaits between writes so chunks can't coalesce into one client data event); response body is buffered to newline boundaries before asserting; req.on("error", reject) is wired before req.write(); cleanup via await using + try/finally is registered before assertions. Assertions are strictly stronger than the old subprocess version — the new writableEnded: false check directly proves the response arrived while the request body was still open.
Extended reasoning...
Overview
This PR refactors test/regression/issue/13696.test.ts from a subprocess-spawning design (three bunExe() -e children, each loading node:http/node:net in a fresh debug process, paced by await wait(50) and guarded by a 3s setTimeout().unref()) to an in-process design that runs the net.createServer and http.request directly in the test body. The three tests become test.concurrent, chunk pacing is replaced by a Promise.withResolvers() handshake so the server writes chunk N+1 only after the client observed chunk N, and both sides buffer to protocol framing (server via readUntil on the full chunked frame, client via newline-buffered data events). Cleanup uses await using on the server and try/finally { req.destroy() } on the request. File runtime drops from ~9s to ~3.5s locally per the PR.
Security risks
None. This is a test-only change to a regression test for node:http duplex request behavior. No production code, no auth/crypto/permissions paths, no external network access (loopback + unix socket only, port: 0).
Level of scrutiny
Low-to-moderate. Test-only, mechanical refactor with a clear speedup goal. The main risks for this class of change are (a) introducing timing-based flakiness and (b) weakening what the original test asserted. Both were checked: the sleep/timeout machinery is replaced with an explicit ack handshake (no setTimeout/sleep remains), and the assertions are strictly stronger — the old version asserted stdout lines and exit code, the new version asserts the same event sequence plus the raw request line, Transfer-Encoding: chunked header, the exact chunked-frame bytes, and req.writableEnded === false at response-end (which is the actual invariant issue #13696 was about).
Other factors
My earlier inline comment about readUntil(sock, payload) racing against the trailing CRLF was addressed in commit 0fe8297 — the marker is now the full chunkedFrame (${len.toString(16)}\r\n${payload}\r\n), so toEndWith(chunkedFrame) cannot see a partial buffer. Commit d588b9b added sock.on("error", () => {}) to the server-side sockets so the ECONNRESET from req.destroy() in the finally block doesn't surface as an unhandled error, plausibly addressing the CodeRabbit threads that were opened and then followed by that commit. The chunkReceived handshake was traced for the coalescing edge case: because the server awaits each ack before the next sock.write, the client cannot receive two chunks in one data event, so calling chunkReceived.resolve() per line is safe. The regression fix (#30377) already shipped, so USE_SYSTEM_BUN=1 passing is expected here — this is a refactor of an existing test, not a new one.
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CI status: 180 of 181 jobs pass on 7131634. The one red job is ubuntu 25.04 aarch64, where |
Problem
test/regression/issue/13696.test.tstakes 13s on the debian 13 x64-asan lane (build 110300). Locally with a debug build it took 9.11s, about 2.2s per test.node:httpandnode:net, which takes about 2s in a debug build. The tests ran one after another, and the fixture paced its body chunks with a fixed 50ms sleep.Fix
netserver and thehttp.requestclient now run inside the test process. The three tests run withtest.concurrent, each on its ownport: 0listener or unix socket.Transfer-Encoding: chunkedheader, and the chunked frame of the singlewrite()are checked on the server side. After the response ends,req.writableEndedmust still befalse, which proves the response arrived while the request body was open.bun bd test test/regression/issue/13696.test.tsgoes from 9.11s to 3.5s locally (10 runs, all green). The tests themselves take about 1s. The rest is runner startup. Also green underUSE_SYSTEM_BUN=1.Background
ClientRequestwith onewrite()and noend()never sent the request. In duplex mode theresponseevent was held back untilend(). docker-modem does a write-once-keep-open POST forcontainer.execstdin, so testcontainers hung. node:http: dispatch request on first write() and emit response in duplex mode #30377 fixed it.Content-Lengthand no chunked encoding. The server writes raw frames and closes the connection, so the clientendevent depends on the server'ssock.end().Notes
bun-debug -e 'require("http"); require("net")'alone takes 2.0s, against 0.3s for an empty script. That is the whole cost of the old subprocess design.expect()calls run in the test body, not inside the server callback, so a failed assertion reports against the test instead of surfacing as an unhandled rejection.test.concurrentto this file. This change keeps that and removes the subprocesses too.[auto-merge] gate passed · iteration 2 · 1 files touched
passes on PR (with fix)
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