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…t each case in full Every case of the matrix now runs as test.concurrent with its own SimpleRegistry and project directory. Skipped cases are registered with test.concurrent.skip, because a plain skip ends the concurrent group around it. The two snapshot files are replaced by a model of what each case must produce: exit code, stdout and stderr (or the merged terminal output), the scanner's own output, the installed packages, the package.json dependencies, the bun.lock packages and the registry requests. Each case compares the whole result with one toEqual, and checks the state the setup install produced the same way. TTY cases spawn with an inline terminal and wait for its exit callback, so the whole output has arrived before it is compared. A pre-created Bun.Terminal stays open after the child exits, and proc.exited can resolve before the last output was delivered. SimpleRegistry exposes its dependency table so the runner can derive install trees from it.
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Status: ready for review. Origin: the daily slow test sweep (21 s on alpine 3.23 aarch64 and 17 s on debian 13 x64-asan in build 102501). How the numbers in the description were taken, on main at 4448a2e and on this branch: time bun bd test test/cli/install/bun-security-scanner-matrix-with-node-modules.test.ts
time bun bd test test/cli/install/bun-security-scanner-matrix-without-node-modules.test.tsFull matrix (the Second commit (8892d91): the 32 entry skip list is gone, those cases pass under the new expectations. Details in the description. |
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Included review availability: Your plan provides up to 5 included reviews per hour; 1 remains after this review. WalkthroughThe security scanner matrix runner now computes expected project and command state before execution. It uses isolated registries, supports piped and terminal processes, normalizes output, validates results, and runs eligible cases concurrently. ChangesSecurity scanner matrix testing
Suggested reviewers: 🚥 Pre-merge checks | ✅ 4✅ Passed checks (4 passed)
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In `@test/cli/install/bun-security-scanner-matrix-runner.ts`:
- Around line 526-538: Replace the Math.random()-based CI sampling in the skip
calculation with deterministic selection derived from the stable case index i,
preserving the existing CI_SAMPLE_PERCENT threshold and other skip conditions so
the same subset runs for each commit.
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test/cli/install/__snapshots__/bun-security-scanner-matrix-with-node-modules.test.ts.snapis excluded by!**/*.snaptest/cli/install/__snapshots__/bun-security-scanner-matrix-without-node-modules.test.ts.snapis excluded by!**/*.snap
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test/cli/install/bun-security-scanner-matrix-runner.tstest/cli/install/simple-dummy-registry.ts
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Review sweep: one point raised so far, the random CI sample. It stays, see the resolved thread at #39956 (comment). In short: the sample predates this PR, a different 10% per run is what covers the whole matrix over time, a stride of 10 would only ever run the |
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The sampling thread is closed from both sides, no review threads are open. Format and lint pass. Waiting on Buildkite build 102645 (https://buildkite.com/bun/bun/builds/102645). The red |
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I reviewed this and didn't find any bugs. It's a test-only change, but the runner is a full rewrite: the old loose toContain/snapshot assertions are replaced by a ~200-line expectationsFor() model that derives exact stdout/stderr, exit code, installed packages, lockfile contents and registry requests for all 720 cases. That model becomes the specification these tests enforce, so a human sign-off on the approach is worthwhile.
What was reviewed:
simple-dummy-registry.ts:getDependencies()→ staticdependenciesmap is behavior-preserving; the only other consumer (bun-security-scanner-workspaces.test.ts) doesn't reference the removed method.- Per-case
SimpleRegistry+tempDirisolate the state that previously forced serial execution;usingdisposes both. - TTY path: waits on the inline terminal's
exitcallback (not justproc.exited) and answers only once — no obvious hang or double-write. test.concurrent.skipfor skipped cases keeps the concurrent group intact; matrix ordering, test IDs and skip list are unchanged.
Extended reasoning...
Overview
Rewrites test/cli/install/bun-security-scanner-matrix-runner.ts to run its 720-case matrix concurrently (per-case registry + tempDir) and to assert each case with a single toEqual against a derived expectationsFor() model instead of toContain phrases and two .snap files. Deletes both snapshot files (~13.7k lines). Refactors simple-dummy-registry.ts to expose the dependency map as a public static so the model can reuse it. No production code is touched.
Security risks
None. Test infrastructure only; the registry is a local Bun.serve({ port: 0 }), no external network, no auth or crypto.
Level of scrutiny
Medium. Test-only, so worst case is CI noise or a false-pass rather than a shipped regression. But the expectationsFor() function is dense (~185 lines) and encodes a lot of specific facts about bun install/add/update/remove behavior — manifest fetch counts, linker layout, exact summary wording, lockfile save conditions, the isolated linker leaving removed packages in the store. If the model is wrong in a way that mirrors a real bug, the test certifies it. The PR description says the model was validated against all 1408 old snapshot entries with 0 mismatches and the full matrix passes on debug, release, CI=1, and Windows, which is strong evidence — but a maintainer should still confirm the approach (derived oracle vs. snapshots) is what they want for this suite.
Other factors
- The
simple-dummy-registry.tschange is a straight refactor: privategetDependencies()→ public staticdependenciesmap with identical contents. The other consumer (bun-security-scanner-workspaces.test.ts) doesn't touch either symbol, and the PR description reports that test still passes. - Concurrency safety looks right: each case owns its
SimpleRegistry(request log, scanner tarball choice) and itstempDir, both released viausing. Nothing shares state across cases. - The TTY path awaits both
proc.exitedand the terminal'sexitcallback before decoding trailing output, which addresses the ordering flake the description mentions. The prompt answer is guarded so it's written once. - Skip handling uses
test.concurrent.skipso skipped Windows-TTY / CI-sampled cases don't serialize the rest of the group. The skip list, test IDs, and matrix ordering are unchanged from before. - No timeline activity yet (no prior human or bot reviews).
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On the review's point that Snapshots were not an option once the cases run concurrently: Two guards against the model agreeing with a bug. The request part, which is all the old snapshots covered, was run against those snapshots for every non-skipped case before they were deleted: 1408 entries, 0 mismatches. The rest of the model comes from the observed behavior, and the two places where it encodes behavior that somebody may want to change are marked in the source: |
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Updated 1:37 PM PT - Aug 21st, 2026
✅ @robobun, your commit 8892d91773992ab576f254c4e5d90cd03a0c2fbf passed in 🧪 To try this PR locally: bunx bun-pr 39956That installs a local version of the PR into your bun-39956 --bun |
The 32 skipped cases are `remove` and `uninstall` without node_modules. They were skipped because the old assertion expected the removed package to be absent, while is-odd in the fixture still depends on it. The expected state now follows the dependency graph, and all 32 pass with the debug and release builds on Linux and on Windows.
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Second review pass on 8892d91 raised nothing. The risk note repeats the sampling point, which was settled in the thread above (the reviewer withdrew it). No threads are open. Format and lint pass on 8892d91, Buildkite build 102804 is running: https://buildkite.com/bun/bun/builds/102804 |
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I reviewed this PR and didn't find any bugs. The rewrite is careful and well-verified (full matrix on multiple platforms, request model cross-checked against the deleted snapshots), but it replaces snapshot assertions with a ~250-line derived model in expectationsFor() that is now effectively the spec for the security-scanner install flow, and the follow-up commit drops the #22255 skip list by encoding that behavior into the model. The author flagged the approach as wanting a human sign-off, and I agree a maintainer should look at the model and the skip-list removal.
What was reviewed:
- Per-case isolation (own
SimpleRegistry+tempDir),test.concurrent.skipfor skipped cases, TTY path awaiting the terminal'sexitcallback before reading output. expectationsFor()derivations for manifests/tarballs/installed packages/lockfile across the add/remove/update/install × hoisted/isolated × TTY axes; the #22255 and isolated-store-entry-left-behind cases are commented in-source.simple-dummy-registry.tschange is a straight refactor ofgetDependencies()into a public static map; other callers (bun-security-scanner-workspaces.test.ts) don't touch that method.
Extended reasoning...
Overview
Test-only change: a full rewrite of test/cli/install/bun-security-scanner-matrix-runner.ts (~500 lines diffed), a small refactor in simple-dummy-registry.ts moving the per-package dependency map from a private method to a public static, and deletion of two ~6-7k-line .snap files. No production code (src/) is touched. The runner now spawns each of the 720 matrix cases with its own registry/tempdir under test.concurrent, and asserts a single toEqual against a model computed by expectationsFor() covering exit code, exact stdout/stderr/terminal output, scanner output, installed packages, package.json deps, bun.lock packages, and registry request logs. A second commit (8892d91) drops the 32-entry TESTS_TO_SKIP set — the model now encodes the #22255 behavior instead of skipping it.
Security risks
None. Test harness only; talks to a local in-process SimpleRegistry, uses tempDir from harness, no external network or auth.
Level of scrutiny
Medium-high. It's test-only so it can't break users, but the new expectationsFor() is dense model code that becomes the de-facto specification for how bun install's security-scanner path behaves across every axis (command × args × linker × lockfile × scanner type × advisory × TTY). If the model is subtly wrong in a corner it will certify a regression rather than catch it. The author guarded against this — the request-log portion was diffed against all 1408 old snapshot entries with 0 mismatches, and the two places encoding known-buggy behavior (#22255 remove-still-installs, isolated linker leaving store entries) are commented. Still, the author explicitly asked for a maintainer sign-off on the approach in the thread.
Other factors
- The PR description says "skip list does not change" but commit 8892d91 removes
TESTS_TO_SKIPentirely. That's a meaningful delta from the description and un-skips 32 cases previously tied to #22255; a maintainer should confirm that encoding the #22255 behavior into the model (rather than skipping it) is the intended direction. - The one review thread (CodeRabbit's deterministic-sampling suggestion) is resolved with a sound rationale; the
Math.random()sampling predates this PR. - Concurrency correctness looks fine: each case has its own
SimpleRegistry(using registry = new SimpleRegistry(...)) andtempDir; the shared staticSimpleRegistry.packages/dependenciesmaps are read-only. The TTY runner awaits bothproc.exitedand the terminalexitcallback before decoding, which the description explains is needed to avoid dropped tail output. simple-dummy-registry.ts's only other consumer (bun-security-scanner-workspaces.test.ts) doesn't call the removedgetDependencies, and the author reports it still passes.
Given the size, the model-as-spec design decision, and the author's own request for a human sign-off, deferring rather than approving.
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The description was updated together with 8892d91: the third Fix bullet and the "Skip list" paragraph in the notes cover the removal, and the verified counts now read 720 pass for both files. The sentence about the skip list not changing was from the first version. The two things to sign off on are the ones named here: the model as the expected result, and expecting the dependency graph's outcome for the 32 remove cases instead of skipping them. |
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Build 102804 so far: 169 of 181 jobs passed, 12 running, no failed job. The ten entries marked flaky passed on retry or alone and none of them is one of the files this PR touches. |
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@robobun compare CI timings |
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CI wall time per file and lane, in seconds. Measured the way with-node-modules
without-node-modules
The checked-in medians in Two notes. The asan lane is where the time was, and it is now bounded by the concurrency cap of 5 that ASAN builds use (4 s is about 52 cases at 5 at a time). On the two musl lanes the with-node-modules file keeps a floor of about 2.5 to 3 s while its sibling takes 0.6 s on the same lanes with the same number of cases. That was there before as well (3.7 and 5.1 against 1.3 and 1.5), and concurrency does not move it, so it looks like one slow step on musl rather than per case cost. I have not looked into it. |
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The TTY race this PR's runner change also avoids now fails the matrix on main (builds 110964 and 110943). #41591 applies only that part (inline terminal plus the exit callback) so main is green while this rewrite is reviewed. |
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Problem
bun-security-scanner-matrix-{with,without}-node-modules.test.tsrun their 720 cases one at a time: 21 s and 17 s on the slowest CI lanes, 856 s and 926 s for the full matrix with a local debug build. No case waits on a timer.SimpleRegistryis one shared server whose request log and scanner tarball are set per case. The request assertions usetoMatchSnapshot, which throws inside a concurrent test. A plaintest.skipends the concurrent group around it, and CI skips 90% of the matrix.toContainon a few phrases, one existence check,toContain("")for the bunfig-only scanner.Fix
test.concurrent. Skipped cases usetest.concurrent.skip. Matrix, order and test ids do not change.expectationsFor()derives the complete result of a case from its options. OnetoEqualper case compares exit code, exact stdout and stderr (merged terminal output for TTY cases), the scanner's own output, installed packages,package.jsondependencies,bun.lockpackages and registry requests. The setup install's result is checked the same way. The.snapfiles go away. The model reproduces all 1408 request entries they held.removewithout node_modules. The old assertion expected the removed package to be absent, butis-oddin the fixture depends on it (Under an unusual configurationbun remove <pkg>without a node_modules will install the package in node_modules #22255 has the same graph). The expected state follows the dependency graph, and the 32 cases pass.exitcallback. With a pre-createdBun.Terminal,proc.exitedcan resolve before the last output arrived (seen locally). Exact comparison would turn that into flakes.bun bd test, full matrix: with-node-modules 856.11 s before, 215.83 s after. without-node-modules 926.15 s before, 208.31 s after. Both 720 pass (688 pass and 32 skip before). Also green: the release build,CI=1, Windows x64,bun-security-scanner-workspaces.test.ts.Background
bun:testruns adjacent concurrent tests as one group, at most 20 at a time (5 in ASAN builds). An entry that is not concurrent, a plain skip included, closes the group.Bun.spawn({ terminal })belongs to the subprocess. When the child exits, bun delivers the rest of the output, closes the terminal and callsexit. A terminal passed in stays open for reuse.Notes
Assertion changes per case. Before: exit code, a few
toContains, one existence check, two request snapshots. Now:stdoutandstderrin full, afternormalizeBunSnapshot. Elapsed times become[<time>]. Two lines exist only in debug builds and are removed:debug warn:and theScanning N packages took Nmsline bun prints when a scan takes over a second. TTY cases compare the merged terminal output: advisories, prompt, echoed answer,Continuing with installation...orInstallation cancelled., and the install summary.scannerOutput: the scanner'sSCANNER_RAN: N packagesline with the exact count. It is compared on its own because the scanner writes to the inherited stderr, so its position relative to bun's output depends on scheduling. Empty for the bunfig-only scanner, whose full error text is asserted now.installedPackages, before and after: every extracted package and where the linker put it, from the harness'snodeModulesPackages(), which ignores links and junctions. The cache thatcache.disableputs innode_modules/.cacheis filtered out. This covers the npm scanner being installed before a cancelled install, removed packages being deleted (hoisted) or left in the store (isolated), and the with-node-modules cases, which checked nothing on disk before.packageJsonDependenciesandlockfilePackages: a cancelled command leaves both alone, add and remove edit both, a command without a lockfile writes one only when it proceeds.requestedPackagesandrequestedTarballs: the content of the old snapshots, derived. A temporary check ran the model against the old.snapfiles for all 1408 non-skipped cases: 0 mismatches.runBunInstall(), so itsnot.toContain("panic:")checks are gone. A failing setup install throws with its stderr.shouldFailplumbing and the never-enabledscannerSyncronouslyThrowsswitch are gone. The model computes the exit code.Install owned output. The model also derives the lines bun install prints on its own behalf:
Resolving dependencies,Resolved, downloaded and extracted [N],Saved lockfileand the summary block. A self-review pass suggested stripping those innormalizeOutputinstead, because a change to install's wording or accounting now fails scanner cases too. They stay: REVIEW.md asks for exact values on normalized output, the summary afterContinuing with installation...is the only direct evidence in the output that the install went on after the prompt,Saved lockfileis the only signal forremove is-even(the package set does not change there), and a wording change costs one edit insummary(), not a regeneration.Skip list. The same pass pointed out that all 32 skipped cases pass under the new expectations, which made the list and its "failing for other reasons" comment wrong. #22255's reproduction has the fixture's own dependency graph (
is-odddepends onis-even), so the behavior the model expects is the one that graph calls for. The second commit removes the list.Timing. Local debug+ASAN build, full matrix, shared host: before 856.11 s / 926.15 s, after 215.83 s / 208.31 s (runs of the same code ranged from 199 s to 288 s, the host load varies). ASAN builds cap concurrency at 5 and a case costs about 1.6 s of CPU there, mostly the scanner child process, so that is the floor. Release build (
USE_SYSTEM_BUN=1), full matrix: 27.3 s / 34.0 s before, 3.6 s / 2.9 s after.CI=1(about 55 sampled cases): release about 0.5 s per file, debug+ASAN 17 s. The sameCI=1debug run took 73 s with plaintest.skip, because the skipped cases serialized the rest. Windows x64 debug build (TTY cases skipped, 432 cases per file): 166 s / 216 s with plain skips, 53 s / 50 s withtest.concurrent.skip. Per case wall time at concurrency 20 on Windows: median 2.3 s, max 3.7 s. No per-test timeout is set, like the other concurrent install tests.Not done. Building each starting project once and copying it per case.
bun.lockembeds the registry port, so every copy would need its lockfile rewritten for its own registry, and isolated layouts would have to be copied with verbatim symlinks. The setup install is the cheap part of a case (about 0.3 s of 1.6 s in a debug build), and in CI it would save a few dozen installs per file at most.Related. #35851 changes
proc.exitedfor a pre-created terminal. This test does not depend on it either way. #37203 already turned the manifest cache off, which #36215 also did.no test proof · iteration 0 · docs-only change; test-proof not applicable