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test(rules): align generate_output_location tests with current args.* contract#557

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russfellows merged 3 commits into
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fix/group-A-generate-output-location-tests
Jun 29, 2026
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test(rules): align generate_output_location tests with current args.* contract#557
russfellows merged 3 commits into
mainfrom
fix/group-A-generate-output-location-tests

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Summary

`generate_output_location` was rewritten (LAY-05) to read `args.orgname` and `args.systemname` directly, populated upstream by:

  • `args.orgname`: `main._main_impl()` orgname-resolution gate reading `orgname.yaml` written by `mlpstorage init`
  • `args.systemname`: argparse from `--systemname` (`MLPSTORAGE_SYSTEMNAME` env fallback)

The test file in `mlpstorage_py/tests/test_generate_output_location.py` predated that rewrite and still passed `orgname=`/`systemname=` as Python kwargs that the function silently ignored, so every one of 25 tests hit the "orgname is empty" `ConfigurationError` before reaching the behavior under test. The unused kwargs in the function signature were the trap that misled the test author.

Changes

  • `mlpstorage_py/rules/utils.py`
    • Remove the unused `orgname=`/`systemname=` keyword-only parameters from `generate_output_location`'s signature. The body already exclusively reads `args.orgname`/`args.systemname`; the dead kwarg surface is what trapped the test author.
    • Add `parameter="orgname"` / `parameter="systemname"` to the two existing `ConfigurationError` raises so the dispatch layer can surface a typed user-facing error (the `ConfigurationError` class already exposes `.parameter`; the raise sites just weren't filling it in).
    • Fix the systemname suggestion env-var name from `MLPERF_SYSTEMNAME` to `MLPSTORAGE_SYSTEMNAME` to match the canonical `MLPSTORAGE_SYSTEMNAME_ENVVAR` constant exported by the same module.
  • `mlpstorage_py/benchmarks/base.py`
    • Simplify the one production caller that was threading `args._validated_orgname` / `args._validated_systemname` through as kwargs. Those kwargs are gone now and the obsolete comment about "legacy / whatif modes skip the orgname/systemname requirement" no longer matches behavior (whatif uses the same canonical shape as closed/open). The validation helper still stashes `validated*` on args; only the thread-through-as-kwargs step is removed.
  • `mlpstorage_py/tests/test_generate_output_location.py`
    • Rewrite `_benchmark()` helper to put orgname/systemname on `args` by default (matching the production contract), with overrides for omit (`None`) and empty-string (`""`) cases.
    • All 19 happy-path / safety-guard tests drop the inline kwarg pass-through.
    • Drop `test_missing_mode_attribute_keeps_legacy_shape` and rename `test_whatif_has_no_closed_open_prefix` to `test_whatif_uses_canonical_shape` — production no longer special-cases either mode-missing or whatif.
    • The missing-orgname / empty-orgname / missing-systemname tests now omit the attribute from args (the realistic failure mode at runtime) and assert the typed `parameter` field that the production code now sets.

Test plan

  • `uv run python -m pytest mlpstorage_py/tests/test_generate_output_location.py -v` → 32 passed (was 9 passed + 25 failed)
  • `uv run python -m pytest tests/ mlpstorage_py/tests/ -q` → 3107 passed (no regressions; the 34 remaining failures are pre-existing groups B/E/G that subsequent PRs will address)
  • No other production callers of `generate_output_location` pass `orgname=`/`systemname=` as kwargs (verified via grep across mlpstorage_py and tests)

… contract

The test file (test_generate_output_location.py) was written when
generate_output_location's design accepted orgname/systemname as
keyword-only kwargs threaded by the CLI dispatch layer. The function
has since been rewritten (LAY-05) to read both from benchmark.args,
which is populated upstream by main._main_impl()'s orgname-resolution
gate (reads orgname.yaml written by `mlpstorage init`) and argparse
from --systemname.

The 25 tests in the file kept passing values as Python kwargs that the
function silently ignored, so every test hit the "orgname is empty"
ConfigurationError before reaching the behavior under test.

Changes:

mlpstorage_py/rules/utils.py
- Remove unused orgname=/systemname= keyword-only parameters from the
  function signature. The body already reads args.orgname/args.systemname
  exclusively; keeping the kwargs in the signature misled the test
  author (the failure cascade for this whole file).
- Add parameter="orgname" / parameter="systemname" to the two existing
  ConfigurationError raises so the dispatch layer can surface a typed
  user-facing error (the ConfigurationError class already exposes the
  attribute; the raise sites just weren't filling it in).
- Fix the systemname suggestion env-var name from MLPERF_SYSTEMNAME to
  MLPSTORAGE_SYSTEMNAME to match the canonical
  MLPSTORAGE_SYSTEMNAME_ENVVAR constant exported by the same module.

mlpstorage_py/benchmarks/base.py
- Simplify the one production caller that was threading
  args._validated_orgname / args._validated_systemname through as kwargs.
  Those kwargs are gone now and the comment about "legacy / whatif modes
  skip the orgname/systemname requirement" no longer matches production
  behavior (whatif uses the same canonical shape as closed/open).
  The validation helper still stashes _validated_* on args; only the
  thread-through-as-kwargs step is removed.

mlpstorage_py/tests/test_generate_output_location.py
- Rewrite _benchmark() helper to put orgname/systemname on args by
  default (matching the production contract), with overrides for omit
  (None) and empty-string ("") cases.
- All 19 happy-path / safety-guard tests drop the inline `orgname=`/
  `systemname=` kwargs.
- Drop test_missing_mode_attribute_keeps_legacy_shape and rename
  test_whatif_has_no_closed_open_prefix to
  test_whatif_uses_canonical_shape — production no longer special-cases
  either mode-missing or whatif.
- The missing-orgname/empty-orgname/missing-systemname tests now omit
  the attribute from args (the realistic failure mode at runtime) and
  assert the typed `parameter` field that the production code now sets.

Result: 25 previously-failing tests in this file → 32 passing (file
gained one test from a parametrize-out collapse).
@FileSystemGuy FileSystemGuy requested a review from a team June 26, 2026 23:08
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MLCommons CLA bot All contributors have signed the MLCommons CLA ✍️ ✅

…location call assertion

PR #557 (this branch) removed the unused `orgname=`/`systemname=`
keyword-only params from `generate_output_location`'s signature and
updated the production call site in `mlpstorage_py/benchmarks/base.py`
to stop threading them through. The primary tests in
`mlpstorage_py/tests/test_generate_output_location.py` were updated to
match, but a sibling test in `tests/unit/test_benchmarks_base.py`
(a separate test tree) still asserted the old kwarg-bearing call shape
via `assert_called_once_with(benchmark, datetime_str,
orgname=None, systemname=None)`, which `mock.assert_called_once_with`
treats as a literal equality check on the call signature.

After the production code dropped the kwargs the mock saw
`generate_output_location(benchmark, datetime_str)` and the assertion
failed with "expected call not found". The fix is to drop the dead
kwargs from the assertion; the behavior under test is just "the
production wrapper calls the helper with the benchmark and a
datetime string."
@FileSystemGuy

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Heads-up from a parallel session: pushed a one-line fix to this branch (commit `35954a0`) that unsticks CI.

What was broken: tests/unit/test_benchmarks_base.py::TestBenchmarkGenerateOutputLocation::test_calls_generate_output_location was in a different test tree than the ones this PR primarily updates (mlpstorage_py/tests/test_generate_output_location.py), and it still asserted the old kwarg-bearing call shape via mock.assert_called_once_with(benchmark, datetime_str, orgname=None, systemname=None). assert_called_once_with treats the expected signature as a literal equality, so once the production code in benchmarks/base.py stopped threading those kwargs, the mock saw generate_output_location(benchmark, datetime_str) and the equality check failed with "expected call not found."

The fix: drop the dead kwargs from the assertion at line 580 — the behavior under test is just "wrapper calls helper with the benchmark and a datetime string."

-            mock_gen.assert_called_once_with(
-                benchmark, "20250115_120000", orgname=None, systemname=None
-            )
+            mock_gen.assert_called_once_with(benchmark, "20250115_120000")

Why I touched this branch from a sibling session: the user was tracking three concurrent PRs (#553, #555, #557). #553 and #555 went green; #557 was the only one with a real test failure (vs runner flakes) and I had context loaded, so unsticking it inline was faster than a hand-off. CI is green now (test (3.12) 2m57s on 35954a0).

If you'd rather restructure the fix (e.g. fold it into the existing mlpstorage_py/benchmarks/base.py simplification commit instead of a separate commit), feel free to reset and recombine — the diff is minimal.

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Rolling

@russfellows russfellows merged commit 80ec4ce into main Jun 29, 2026
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@russfellows russfellows deleted the fix/group-A-generate-output-location-tests branch June 29, 2026 14:48
@github-actions github-actions Bot locked and limited conversation to collaborators Jun 29, 2026
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2 participants