test(install): run isolated-install.test.ts concurrently and tighten its assertions - #40095
test(install): run isolated-install.test.ts concurrently and tighten its assertions#40095robobun wants to merge 4 commits into
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…its assertions Every describe and top-level test in the file is now concurrent. Each case installs with BUN_INSTALL_CACHE_DIR pinned to its own directory, so the per-file cache CI exports is not shared between concurrent installs. The hand-rolled install spawns that checked the exit code alone now pin the exact stderr and the store layout through one install() helper.
…peer case The count was 2 instead of 0 in 1 of 20 runs on Windows: a manifest the first install wrote to the cache was fetched again. The other checks of that case do not depend on it.
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Included review availability: Your plan provides up to 5 included reviews per hour; 1 remains after this review. WalkthroughThe pull request isolates install caches per test directory and standardizes install execution and output assertions. It converts the suite to concurrent tests and expands coverage for patches, peers, URLs, linkers, hoisting, and global virtual stores. ChangesIsolated install test coverage
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Status: the change is complete and verified locally.
PR: #40095 |
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LGTM — test-only change that runs isolated-install.test.ts concurrently and tightens assertions.
What was reviewed:
- Per-test
BUN_INSTALL_CACHE_DIRmatches the.bun-cachebunfig already sets, so the env override in CI no longer forces concurrent cases onto one shared cache/global store. entryStoreNamealready compares the hash segment only, so global-store sharing/isolation tests still hold with per-dir caches; the concurrent-installs case still sharesa's cache explicitly.- The
nd11: npm:no-deps@1.1.0alias fixes real manifest-order nondeterminism without weakening the ranged-peer test's contract (still asserts 1.1.0 is bound and 1.0.1 is hoisted). - The
install()helper drains stdout/stderr/exited together and asserts stderr before exit code; every tightened assertion is stronger than what it replaces.
Extended reasoning...
Overview
This PR touches exactly one file, test/cli/install/isolated-install.test.ts, with three kinds of change: (1) every describe/top-level test becomes concurrent, (2) each case pins BUN_INSTALL_CACHE_DIR to its own .bun-cache via new installEnv/createTestDir/install/stderrLines helpers so concurrent installs never share a cache or global store, and (3) 60+ assertions are tightened from exit-code-only or not.toContain("error") into exact stderr, exact .bun listings, and exact error text. One latent flake is fixed by adding an npm:no-deps@1.1.0 alias so the ranged-peer test's premise (both 1.0.1 and 1.1.0 in the graph) no longer depends on manifest arrival order.
Security risks
None. This is a test file; no production code, no auth, no user-controlled input reaches the runtime.
Level of scrutiny
Medium — the diff is ~600 lines but overwhelmingly mechanical (bunEnv → env, registry.createTestDir → createTestDir, test → test.concurrent). The novel logic is a ~50-line helper block plus the alias fix, both of which follow the harness conventions REVIEW.md asks for (drain pipes with Promise.all, assert stderr before exit code, await using, exact assertions over toContain). The blast radius is CI signal only.
Other factors
I checked that writeBunfig already writes cache = <dir>/.bun-cache, so installEnv merely makes the env var agree with bunfig — it changes nothing for tests that relied on the per-dir cache and only neutralises CI's per-file BUN_INSTALL_CACHE_DIR. I checked entryStoreName's comment: it was already written to compare hash suffixes across separate caches, so the "same closure share one global entry" and "different resolutions get different entries" tests remain valid with separate env caches. VerdaccioRegistry.createTestDir does reset some shared instance state (htpasswd, private-pkg-dont-touch, this.users), but this file never populates any of it, so concurrent resets are harmless. The PR description documents 15 linux and 40 windows runs at 82/82; the second commit drops the network-task-count assertion that flaked 1/20 on Windows, which is exactly the kind of cache-count assertion stderrLines is designed to avoid. No prior reviewer comments to address.
…y.createTestDir createTestDir now returns the env that pins BUN_INSTALL_CACHE_DIR to the project's own .bun-cache (the hunk #38255 proposes), so the file-local wrapper goes. install() takes (env, cwd) like runBunInstall. The ranged peer case pins no-deps@1.1.0 through the nd11 alias instead of reaching it through two-range-deps' range, as #38858 does.
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Updated 8:26 AM PT - Aug 22nd, 2026
✅ @robobun, your commit 0cb520c8b6324f8cbd542b681af845d2b9412132 passed in 🧪 To try this PR locally: bunx bun-pr 40095That installs a local version of the PR into your bun-40095 --bun |
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Inline comments:
In `@test/cli/install/isolated-install.test.ts`:
- Around line 51-59: Export shared install-cache helpers from the harness and
reuse them in the isolated install tests: have the harness’s environment
construction use a single installCacheDir symbol for the “.bun-cache” path, and
replace the local installEnv implementation with the exported harness
installEnv. Update the relevant imports while preserving the existing
environment override behavior.
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test/cli/install/isolated-install.test.tstest/harness.ts
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LGTM — test-only refactor that runs isolated-install.test.ts concurrently and tightens assertions; the harness change is purely additive.
Reviewed: the new install() helper and stderrLines() normalization; per-case BUN_INSTALL_CACHE_DIR isolation via the new env field on createTestDir() (additive, so the 28 other callers are unaffected); the two-range-deps → npm:no-deps@1.1.0 alias swap in the ranged-peer case, which fixes real nondeterminism while keeping the premise (1.0.1 hoisted, 1.1.0 in graph) and now asserts it; the concurrent createTestDir calls' shared-path rms and this.users = {} reset — both idempotent and no test in this file uses auth.
Extended reasoning...
Overview
This PR converts test/cli/install/isolated-install.test.ts (82 cases) from serial to concurrent execution and replaces exit-code-only checks with exact-stderr assertions via a new install() helper. It also adds an env property to VerdaccioRegistry.createTestDir()'s return in test/harness.ts so each test project pins its own BUN_INSTALL_CACHE_DIR, which is required for concurrent installs to be independent (CI's per-file BUN_INSTALL_CACHE_DIR export otherwise overrides bunfig's cache, and shared caches race on Windows). No production code is touched.
Security risks
None. Test-only; the harness addition just spreads bunEnv and pins a cache directory inside the already-created temp dir.
Level of scrutiny
Medium — the diff is ~700 lines but almost entirely mechanical: threading env through runBunInstall/install() calls, marking describes .concurrent, and replacing weak assertions with exact ones. The two non-mechanical changes are (1) the harness.ts addition, which is purely additive to a returned object and cannot affect the 28 other files that destructure only { packageDir, packageJson }, and (2) the ranged-peer test's dependency swap from two-range-deps (whose ^1.0.0 dedupes onto 1.0.1 depending on manifest arrival order) to an explicit npm:no-deps@1.1.0 alias. The PR description explains this in detail: the test's purpose — verify that reloading bun.lock keeps the peer bound to the highest satisfying version — is preserved and now deterministic, with a new assertion that pins the premise (bun.lock hoists 1.0.1). This is the same alias device the existing "overridden peer" case already uses.
Other factors
The tightened assertions hardcode more peer-hash suffixes (e.g. +7347ae2d86f1441a), but the file already did this in several places, so it stays consistent with local convention. Concurrent createTestDir() calls share the registry's this.users = {} reset and two rm(..., { force: true }) on shared paths, but no case in this file uses verdaccio auth and the deletes are idempotent, so there is no cross-case interference. The author reports 15 linux + 40 Windows runs passing, and the file's spawn count is unchanged (156 bun installs), so no coverage was dropped. The install() helper drains stdout/stderr/exited concurrently and asserts stderr before exit code, matching the repo's harness conventions.
createTestDir's env and writeBunfig's cache come from one helper, and the tempDir-based cases of isolated-install.test.ts import the same one.
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LGTM — test-only refactor that converts isolated-install.test.ts to concurrent execution and replaces exit-code-only checks with exact stderr/layout assertions.
What was reviewed:
createTestDir's newenvreturn is additive; the 27 other callers only destructure{packageDir, packageJson}so they're unaffected.writeBunfignow callsinstallCacheDir(dir)— same string as before.- Concurrency safety: each case gets its own
BUN_INSTALL_CACHE_DIR; the shared verdaccio instance is read-only for this suite; the pre-existinghtpasswd/usersreset increateTestDiris a no-op race here (no auth tests). Verified 21× linux + 50× windows per the description. - The one semantic fixture change (
two-range-deps→nd11: npm:no-deps@1.1.0) de-flakes a manifest-arrival-order dependence while keeping both no-deps versions in the graph, and adds a lockfile assertion pinning the test's premise (1.0.1 is hoisted). - The
install()helper drains all three pipes concurrently and asserts stderr before exit code;stderrLinesonly strips the two documented progress lines.
Extended reasoning...
Overview
Two files touched, both test-only:
test/harness.ts: addsinstallCacheDir()(private) andinstallEnv()(exported), and hasVerdaccioRegistry.createTestDirreturn{packageDir, packageJson, env}whereenvpinsBUN_INSTALL_CACHE_DIRto the project's own.bun-cache.writeBunfignow callsinstallCacheDir(dir)instead of the inlinejoin(dir, '.bun-cache')— identical output.test/cli/install/isolated-install.test.ts(~700 diff lines): everydescribe/top-leveltestbecomes.concurrent; every install call takes the per-projectenvinstead ofbunEnv; a file-localinstall()helper replaces ad-hoc spawn blocks with exact-stderr assertions; weak checks (not.toContain('error'), exit-code-only,existsSync) are replaced with full directory listings, exact error messages, and package.json content checks. One flaky fixture (two-range-deps' range dep whose resolution depends on manifest arrival order) is replaced with an exactnpm:alias pin.
Security risks
None. No production code, no auth/crypto/permissions paths. The harness helper only builds an env object.
Level of scrutiny
Moderate — the diff is large but almost entirely mechanical (bunEnv→env, test→test.concurrent, spawn block→install() call). The two non-mechanical parts warranted a closer look:
- Harness change blast radius: 27 other test files call
createTestDir. The return-value change is purely additive (newenvfield), andwriteBunfig's cache path is byte-identical. No other file breaks. - The
nd11fixture change: this is the only place a test's inputs change. The PR description explains the flake mechanism (Bun dedupes a range dep onto an existing same-major pin, so whichno-depsversiontwo-range-depsgets depends on manifest arrival order). The replacement keeps the test's invariant — both 1.0.1 and 1.1.0 in the graph, 1.0.1 hoisted — deterministically, and addsexpect(bun.lock).toContain('"no-deps": ["no-deps@1.0.1"')to assert that premise explicitly. The property under test (peer resolution stability across bun.lock reload) is unchanged.
Other factors
- The
install()helper follows the harness conventions from CLAUDE.md/REVIEW.md:await using, all three pipes drained concurrently, stderr asserted before exit code. - Concurrency: each case's temp dir + pinned cache is fully isolated. The shared
VerdaccioRegistryis read-only in this suite.createTestDir'srm(htpasswd)andthis.users = {}do race under concurrency, but they're no-ops here (no auth) and pre-existing. - The hardcoded peer-hash suffixes (
+7347ae2d86f1441aetc.) are deterministic hashes of the peer set and were already used elsewhere in the file; pinning them is a feature (catches unintended hash changes), not a fragility. - Verified 21× on linux debug+ASAN and 50× on Windows release per the description; 3× wall-clock speedup.
- CodeRabbit's one nitpick (dedupe the
.bun-cachestring) was addressed in 0cb520c. - No CODEOWNERS for the touched paths.
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Problem
isolated-install.test.tsran its 82 cases one after another, though almost every case is independent: 20s on debian 13 x64-asan in build 103422.error:on stderr.Fix
describeand top-leveltestis concurrent. Each case installs with theenvthatVerdaccioRegistry.createTestDirnow returns (newinstallEnvintest/harness.ts):BUN_INSTALL_CACHE_DIRpinned to its own.bun-cache. CI's per-file cache overrides bunfig'scache, and concurrent installs that share a cache race on Windows. test(install): give each long-label bun patch test its own install cache #38255 proposes the sameenv.install()helper replaces the exit-code-only spawns with exact stderr (["Saved lockfile"]or[]) and exit code. Layout checks pin wholenode_modulesand.bunlistings, error paths the exact message (Notes).two-range-deps'^1.0.0dedupes onto the exact1.0.1pin when that manifest lands first. It now pins 1.1.0 through annpm:alias, as test(install): pin both no-deps versions instead of racing a range against a pin #38858 does.bun bd test test/cli/install/isolated-install.test.ts, 82 of 82 in 24 runs on linux and 50 on windows.Background
node_modules/.bun/<name>@<version>[+<peer hash>]/node_modules/<name>. The global store moves those entries to<cache>/links/<entry>-<hash>.bun installprints two progress lines to a non-TTY stderr when it resolves. The second carries the network task count, which depends on the cache, sostderrLinesdrops both.Lockfile::get_package_id), so the graph depends on which manifest lands first.Notes
Timing. Local machine: 16 cores, load average 34 to 47 from other work during every run, so absolute numbers are pessimistic, and the before and after runs were interleaved. Debug + ASAN build (the gate's build): before 32.90s, 30.18s, 29.87s; after 10.13s, 9.84s, 10.03s. Further after-runs ranged 9.7s to 14.6s with the load. The slowest case under concurrency was the git patch case at 1.2s to 1.5s, against a 5s default timeout (270s on the asan lane).
registry.start()takes 0.9s here with a release bun; on the asan lane it runs under the binary under test and costs about 7s of the 20s (bun-audit.test.tsis 0.16s on the default lane and 7.7s on asan intest/expected-durations.json), which this change cannot move. Other lanes in build 103422: 4.7s default, 6.6s windows.Windows. The machine exports
BUN_INSTALL_CACHE_DIR=C:\bun-install-cachefor everything, like CI does per file. The unchanged file passed once (4.1s) and then failed 3 cases on each of 6 runs: its installs share that cache, so the "transitive peer deps" case finds manifests cached from an earlier verdaccio instance, whose tarball URLs point at a dead port, and times out, and two cases after it fail on the registry it takes down with it. The changed file passed 50 of 50 runs (1.82s to 1.99s), also with a sharedBUN_INSTALL_CACHE_DIRexported, and left the shared cache empty.One assertion I tried and removed: the second install of the "transitive peer deps" case reports
Resolved, downloaded and extracted [0], which pins its premise (every manifest is served from the cache). On Windows it reported[2]in 1 of 20 runs, so a manifest the first install wrote was fetched again. The case's other checks do not depend on that count.Shape. The first revision pinned the cache through a file-local
createTestDirwrapper. Nine other files intest/cli/installcarry the same one-liner by hand, and #38255 puts it where the cache path is chosen, inVerdaccioRegistry.createTestDir. This PR puts it there as an exportedinstallEnv(dir), whichcreateTestDirreturns and the four cases that build their project withtempDirimport;writeBunfigtakes its cache path from the same helper, so the.bun-cachename lives in one place. #38255 adds the sameenvinline, so whichever of the two lands second has one small conflict increateTestDirwith the same result either way.install()stays file-local: an exact-stderr mode forrunBunInstallis the right home for it once a second file needs one, and it takes(env, cwd)inrunBunInstall's order. #38858 fixes the same manifest-order dependence in this case and in "optional ranged peer" and "aliased peer dependency" (which pass in either order, so they are left to it) with the samend11pin and a tree assertion; the dependency hunk here is identical to its own.Spawns. Counted with a preload that wraps
Bun.spawn: 194 spawns before and after, 156 of thembun install. I kept every install. The ones that look repeated each cover a distinct state: the 4 installs per optional-peer case are the 4 combinations of lockfile and node_modules present or absent; the patch cases step through add, cold cache, remove and re-add; the--linkercases switch the linker with and without a lockfile; the global-store cases check the cold and the warm-hit path.Assertion changes, by case:
optional peers(7 cases, 26 installs): stderr is exactly["Saved lockfile"]when the install saves and[]when it does not, with exit code 0. Before: exit code only, stdout and stderr ignored.existing node_modules, missing node_modules/.bun(2 cases, 3 installs): as above, plus the full.bunlisting of the reset case.--linker flag(2 cases, 7 installs): as above, plusexpectLinker: the fullnode_moduleslisting, whetherno-depsis a symlink, and itspackage.json. Before:lstatSync().isSymbolicLink()only.isolated install with backend(3 cases): exact stderr and exit code, plus the fullnode_modulesand.bunlistings. Before:not.toContain("error").patched package shared by multiple peer variants: the full.bunlisting with the 4 variant hashes. Before:storeDirs.length === 4andstdoutcontainspackages installed.["Saved lockfile"]for every step that changespatchedDependenciesand[]for the cold-cache reinstall. Before:not.toContain("error:").transitive peer deps are resolved when resolution is fully synchronous: stderr is exactly thewarn: incorrect peer dependency "no-deps@1.0.0"line plusSaved lockfile, and the.bunlisting and the entry'snode_modulesare pinned with their peer hashes. Before:allowWarnings: true,toBeDefined(),existsSync.--force replaces a corrupted global-store entry: exact stderr and exit code, andlinks/holds exactly the one entry. Before:not.toContain("error:")andsiblings.some(...).concurrent installs into a cold global store both succeed: each of the 6 racing installs must print nothing (the loser must not report the race), except b's first install, which saves its lockfile. Before: exit codes.bun's resolver follows the double-hop chain: stderr is"". Before:not.toContain("EISDIR").preserves bun patch workspace: stderr is""and stdout ends with the exactTo patchblock. Before:not.toContain("error"),toContain("To patch").--linkervalue: exact stderr, exact stdout (the header, or empty) and exit code 1. Before:toContainandnot.toBe(0).store build timings are printed by --verbose only: the quiet install's stderr is exactly[]. Before: twonot.toContain.existsSync(package.json)checks read the file and compare name and version.expect()calls: 1113 before, 1166 after.cd test && bun run typecheckreports the same 4 pre-existing errors in this file as on main (Bun.TOML.stringifyoverloads andserver.portpossibly undefined), nothing new.no test proof · iteration 0 · platform-specific test(s) that do not run on this machine, deferring to CI, which covers all platforms: test/cli/install/isolated-install.test.ts