ci: fail every lane that selects tests and executes none - #692
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`cargo test` with a filter that matches nothing prints "running 0 tests", then "test result: ok", and exits 0. A lane in that state is indistinguishable from a lane that proved something, and this repo already knew it: #659 added a count to the aerorsync live lane, and ftp-mlsd.yml carries the same check on its listing-timeout step. Two instances, both correct, and eleven siblings without one. One of those siblings was already dead. `delta-sync-integration.yml` selected `product_path_falls_through_silently_when_session_not_eligible`, a test renamed on 2026-05-16 in bb20f6a when password-backed SFTP became eligible for the native leg and the assertion inverted. The workflow line was never updated. Since that day the "SFTP password-only fixture + fallback contract" job has built a Docker fixture, waited for SSH, run zero tests and reported success. Not a hypothesis: run 33434171154, tonight, on main, logs "running 0 tests" followed by "test result: ok" for that step. This commit points it at the test that now holds the contract, `product_path_uses_native_delta_for_password_sftp_with_pinned_host_key`, and asserts it ran. The check is one script, `scripts/assert-tests-ran.sh`, called from fourteen places, rather than fourteen copies of a shell snippet whose subtleties decay independently. Those subtleties are real and are now written down once: `set -o pipefail` at the call site or the step's status is tee's rather than cargo's; no bare assignment from a pipeline under `bash -e`, which is what a step without an explicit `shell:` runs, and which `shell: bash` does not fix because GitHub expands it to `bash -eo pipefail`; and an empty or absent log reported as a distinct failure rather than counted as zero, since a run that died before libtest printed anything is not a run of zero tests. The counts are measurements, not guesses. Each floor is what the lane executed on a real green run, named in the comment beside it, and every one was also reproduced locally: 94, 12 and 1 on run 33434171154; 677 (692 selected, 15 ignored), 15 and 8 on run 33436715702; 2 and 1 on run 33425840938; 358, 9 and 1 on run 33377726369. A step that names exactly one test asserts exactly one, because a second test arriving there changes what the step does; a step that collects a module or a binary asserts at least, because such a suite is meant to grow and an exact match would go red the day someone adds a legitimate test, which usually gets answered by deleting the check. Both new checks were shown to go red before being trusted. Removing the two `#[ignore]` attributes from `integration_ftp_mlsd.rs` and running today's line: exit 0, "running 0 tests", green. The same run with the assertion: exit 1, naming what it expected. Running the delta-sync fallback line as it stands on main: exit 0 and zero tests, and with the assertion, exit 1. The script itself was exercised under `bash -e`, the shell a GitHub step gets, against twelve inputs: at or above the floor, below it, zero, exactly one, more than one where one was promised, two binaries summed, a FAILED result line, an empty log, a missing log, and two malformed argument sets, which exit 2 to keep "you called me wrong" apart from "the gate failed". The two harness scripts under `src-tauri/src/aerorsync/capture/` take the same treatment, and the deflate one is where this class is most visible: its header lists guards that "prevent the useful-looking but false-green shapes paid for during the NAS investigation: wrong compressor, no-op basis, and zero tests", and every guard it lists is on the capture, not on the test run that reads it. One instance is deliberately left: `tests/gtc/parity_harness.sh` runs a per-cell test name and is a developer harness, not a gate, with its own exit-code handling and a downstream parse of the log that already notices an empty run. It is named here so the class is closed on paper as well as in the tree. `build.yml` runs `cargo test` with no filter and cannot select nothing, so it needs no assertion. No Rust changed. `.gitignore` carries `/scripts/*` with per-file exceptions, so the new script needs its own line there or it would never be committed and every guarded lane would fail on a missing file. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01PdAyRPuLt7UymiLNfkiyT7 Signed-off-by: axpnet <45786925+axpnet@users.noreply.github.com>
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📝 WalkthroughWalkthroughThe change adds a shared test-count assertion script. CI workflows and Aerorsync capture scripts now log filtered test output and verify minimum or exact execution counts. ChangesTest execution assertions
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🔵 Low · up to The PR adds shared test-count gates across CI and capture harnesses. One harness still writes validation output to predictable temporary paths, so another process on the same runner could tamper with the gate; the impact is limited to CI and developer validation, but the temporary-file handling should be hardened or explicitly accepted before merge. Sequence Diagram(s)sequenceDiagram
participant CargoTest
participant Tee
participant AssertTestsRan
participant CIWorkflow
CargoTest->>Tee: write test output to log
Tee->>AssertTestsRan: provide log and expected count
AssertTestsRan->>CIWorkflow: return success or failure
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Full details: Docstring CoverageExplanation No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 3 files. (5 skipped: 5 unsupported.) ✨ Finishing Touches📝 Generate docstrings
🧪 Generate unit tests (beta)
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In `@src-tauri/src/aerorsync/capture/run_deflate_rsync_capture.sh`:
- Line 304: Create private temporary log files with mktemp in both
src-tauri/src/aerorsync/capture/run_deflate_rsync_capture.sh (line 304) and
src-tauri/src/aerorsync/capture/run_real_rsync_capture.sh (line 218); pass each
generated path to both tee and assert-tests-ran.sh, and remove the files in the
existing cleanup handlers.
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.github/workflows/aerorsync-protocol.yml.github/workflows/delta-sync-integration.yml.github/workflows/ftp-mlsd.yml.github/workflows/nightly-telemetry.yml.gitignorescripts/assert-tests-ran.shsrc-tauri/src/aerorsync/capture/run_deflate_rsync_capture.shsrc-tauri/src/aerorsync/capture/run_real_rsync_capture.sh
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Review finding on the previous commit, and it is right about the two shell harnesses. `tee` to a fixed name under a shared /tmp follows a symlink another local user pre-created, so a developer running `run_deflate_rsync_capture.sh` or `run_real_rsync_capture.sh` on a multi-user machine could have any file they can write clobbered by their own test output (CWE-377).
Reproduced before fixing, in a stand-in TMPDIR: with the fixed path, a symlink planted at `aerorsync-deflate-oracle.log` and pointing at another file made `tee` overwrite that file's contents. With `mktemp` the name is unpredictable and the file arrives mode 600, so there is nothing to plant. Both scripts already had a `cleanup` on EXIT and the log now goes in there, which also stops the harness leaving a file behind at all. The template carries its directory explicitly, `"${TMPDIR:-/tmp}/...XXXXXX"`, because `mktemp -t` means different things under GNU and BSD and this harness is run on both.
The fourteen workflow call sites keep their fixed paths deliberately, and the boundary is where the code runs rather than how the line is written. A GitHub runner is single-tenant and ephemeral: the only processes on it are the job's own, and anything able to plant a symlink there already executes as that user and can write the log directly, so the mitigation would buy nothing. It would also split these paths from the ones #659 established in the same files. On a developer's machine the other local user is real, which is exactly the two scripts this commit changes.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PdAyRPuLt7UymiLNfkiyT7
Signed-off-by: axpnet <45786925+axpnet@users.noreply.github.com>
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What this is
A pre-release audit finding on the CI lanes, and the fix for the whole class rather than the two instances that were reported.
cargo testwith a filter that matches nothing printsrunning 0 tests, thentest result: ok, and exits 0. A lane in that state looks exactly like a lane that proved something. The repo already knew this: #659 added a count to the aerorsync live lane, andftp-mlsd.ymlcarries the same check on its listing-timeout step. Two instances had the check. Eleven siblings did not.One of those lanes was already dead, and this is the evidence
delta-sync-integration.ymlselectedproduct_path_falls_through_silently_when_session_not_eligible. That test was renamed on 2026-05-16 inbb20f6a6c, when password-backed SFTP became eligible for the native leg with the host key pinned and the assertion inverted. The workflow line was never updated.So since that day the job named "SFTP password-only fixture + fallback contract" has built a Docker fixture, waited for SSH, executed zero tests, and reported success. From run
33434171154onmain, tonight:The step now names
product_path_uses_native_delta_for_password_sftp_with_pinned_host_key, which is where that contract lives today, and asserts that it ran.The fix
One script,
scripts/assert-tests-ran.sh, called from fourteen places, instead of fourteen copies of a shell snippet whose subtleties decay independently. The subtleties are real and are now written down once:set -o pipefailat the call site, or the step's status istee's and notcargo's, which is the same blindness this exists to remove nested inside its own cure.bash -e, which is what a step without an explicitshell:runs, and whichshell: bashdoes not fix, since GitHub expands that tobash -eo pipefail.=Nmeans exactly N and is used where a step names one test, because a second test arriving there changes what the step does and should be said out loud. A plainNmeans at least N and is used where a step collects a module or a binary, because such a suite is meant to grow and an exact match would go red the day someone adds a legitimate test, which usually gets answered by deleting the check.The numbers are measurements, not guesses
Each floor is what the lane actually executed on a real green run, named in the comment beside it, and each was also reproduced locally:
--ignored)--exact)Shown red before being trusted
A count that has never been seen to fail is the thing being fixed here, so neither check was committed until it failed on purpose.
MLSD. With the two
#[ignore]attributes removed fromintegration_ftp_mlsd.rs, which is the realistic way this breaks, since removing them looks like an improvement:running 0 tests,test result: ok, step exit 0, green.::error::MLSD listing tests: executed 0 test(s), expected at least 2.delta-sync fallback. Running the line as it stands on
main, against the real test binary: exit 0 and zero tests; with the assertion, exit 1.The script itself, under
bash -e, which is the shell a GitHub step gets, against twelve inputs: at the floor, above it, below it, zero, exactly one, more than one where one was promised, two binaries summed, aFAILEDresult line, an empty log, a missing log, and two malformed argument sets (which exit 2, to keep "you called me wrong" apart from "the gate failed").What was NOT verified
aerorsyncsubstring, of which 15 are ignored. Two of the 692 are outside theaerorsync::module and match by substring, which is why an anchored count gives 690 and the lane reports 692.transfer_dag::since, the floor is conservative, which is the safe direction.The instance deliberately left
tests/gtc/parity_harness.shruns a per-cell test name and has the same shape. It is a developer harness rather than a gate, it is not invoked by any workflow, it has its own exit-code handling, and it already parses the log downstream in a way that notices an empty run. It is named here so the class is closed on paper as well as in the tree.build.ymlrunscargo testwith no filter and cannot select nothing, so it needs no assertion.Risk
No Rust changed, so the fmt, clippy and test gate is the one
mainalready carries.The floors can only go red by executing FEWER tests than the lane executes today. Adding tests keeps every lane green. If tests are removed deliberately, the lane goes red with a message that says to lower the number in that same commit.
.gitignorecarries/scripts/*with per-file exceptions, so the new script needs its own exception line or it would never have been committed and every guarded lane would fail on a missing file. That line is in this PR.Summary by CodeRabbit
Merge record
Merged at zero incomplete check runs, read from the check-runs API on the head commit rather than from this page, where a superseded
cancelledrun reads as red.CodeRabbit reviewed earlier commits on this branch and raised one Major finding, on a
teeto a fixed name under/tmpin the two capture harnesses, which is fixed in226981faafter being REPRODUCED in a test TMPDIR rather than deduced from the rule. The incremental pass over7204d9dc..226981fawas then rate limited, so the head as merged carries a human reading only.The change this pull request makes is to the instruments themselves, so it deserves the plainest possible statement of what was and was not established. Established: each of the fourteen call sites was exercised against real cargo output, the thresholds are what a named green run actually executed rather than estimates, and both gates were watched going RED with the condition made true. Not established: no lane was run end to end here, so what is proven is the selection, the counting and the behaviour of the assertion, not that every lane still passes in CI. That is what the CI run on this pull request is for, and it is green.