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Vamsi Karthik R 99b1a23773 test(slo): E2E + API suite for SLOs (#13836)
Adds automated test coverage for **SLOs** (#13547, #13577, #13579,
#13704, #13761, #13784), which shipped with none. **149 tests** — 77
Playwright + 72 pytest — all three SLI types, both query languages,
happy / negative / edge paths. Clean branch off `main`.

**UI (Playwright · `tests/ui-testing`)**
- `pages/sloPages/` — 4 page objects (verified `data-test` selectors,
hydration + Monaco-sync waits, OSelect commit-retry, virtualized-list
filtering).
- `playwright-tests/SLO/slo-crud.spec.js` (24) — create
count/time-slice/grouped through the form, detail, edit, SLI-type
change, tags, pause, delete, filters; negative: dismissed delete, empty
search, cancel, unmeasured SLI is absent not zero.
- `playwright-tests/SLO/slo-form-validation.spec.js` (20) — server
errors surfacing in the form, conditional fields per SLI type, count +
time-slice previews, **PromQL count and time-slice created end to end**;
negative: no stream, invalid aggregate, over-long name, target
boundaries.
- `playwright-tests/SLO/slo-alert-sli.spec.js` (8) — **the `alert` SLI
type**: source picker, create, config carries only the alert id, detail
names the source; negative: ineligible source offered-but-disabled,
grouped alert SLI, slice finer than source cadence.
- `playwright-tests/SLO/slo-timeslice.spec.js` (10) — **#13761 P0
regression** (measured SLI, not the preview), PromQL, previews, gaps,
language-flip clearing.
- `playwright-tests/SLO/slo-alerts.spec.js` (15) — burn-rate +
error-budget kinds, presets, edit, freeze door, burndown; negative: no
destination, cancel, blank/invalid name.
- `playwright-tests/utils/slo-seed.js` — backdated seeding, metrics
seeding, eligible-source-alert fixture, ground-truth query, fail-fast
env guard, transient-store retry, full fixture teardown (alerts →
streams → destinations → templates).

**API (pytest · `tests/api-testing`)**
- `tests/slos/test_slo_validation.py` (72) — full REST surface
(create/get/update/enable/delete/groups/slo-eligible), validation on
**both create and update** (name, target, window, slice, config shapes,
comparators, float-threshold round-trip), boundaries (target
0.001/99.999, name 256 vs 257, threshold 0/negative/1e12/NaN, unicode
names), alert-source eligibility (silence-gated, too-infrequent, cron),
PromQL config shapes, auth 401/404.

**CI**
- Two shards: `SLO` (`workers: 3`) and `SLO-Measurement` (`workers: 1`).
Split because the backfill job runs with
`ZO_SCHEDULER_SLO_BACKFILL_CONCURRENCY=1`, so measurement specs sharing
an instance starve each other's waits — `fullyParallel` races spec
*files*, which `mode:'serial'` cannot prevent. The 3-worker pin is
SQLite: at 5, concurrent SLO/alert/destination writes trip `database is
locked` on the single-node meta store.
- New optional per-shard `ingest_allowed_upto` (`240`) alongside the
existing `quick_mode_enabled`: the workflow default of 5 **hours**
silently drops the 8 days of history an SLO window needs, while still
answering `200`. Other shards keep the default. Same precedent as
`api-testing.yml`'s `48`.

**Feature code**: 9 additive `data-test`/`dataTest` attributes in
`SloDetail.vue`, `SloList.vue`, `SloAlertCondition.vue` — no logic
changes, `vue-tsc` clean. The stat tiles, tabs and burn-window inputs
had no stable selectors; `OStatStrip`/`OTab` already forward the
attribute.

**Behaviour**: self-cleaning (`e2e_slo_*`, worker-scoped since
`afterAll` runs per worker).

**Verified in CI** on this branch: `e2e / SLO` **52 passed** (1.8m,
workers pinned to 3), `e2e / SLO-Measurement` **25 passed** (11.3m,
workers pinned to 1) — the measurement shard passing confirms the
per-shard `ingest_allowed_upto` took effect, since those tests are
impossible under the 5-hour default. pytest **72 passed** locally; in
CI's 599-test run one setup delete hit a transient 500 (see findings)
and now retries.

**Findings for the feature owner** (reported, not fixed here):
- A blank "good when" shows `Request failed with status code 422` —
`pruned()` drops the empty key, so the API's real 400 message never
reaches `save()`.
- A rejected alert name shows no banner: `SloAlertForm.submit()` returns
on `nameError` before setting `saveError`.
- `avg(latency_ms); DROP TABLE users--` is accepted at create time
(parsed only at measurement).
- The name-length message says "less than 256 characters" but 256 is
accepted — 257 is the first rejection.
- Duplicate alert names on one SLO are accepted (duplicate SLO names are
a 409), and the panel lists them by name, so they are indistinguishable.
- SLO names accept characters that break the list's own
`slos-slolist-edit-${name}` selectors; alert names correctly reject
them.
- All chart/preview root `data-test` ids are unreachable — a parent's
fallthrough attribute overrides the child root's.
- Both edit forms hydrate asynchronously, so a blank form can flash
before the stored values appear.
- `DELETE /slos/{id}` on a freshly-created SLO returned **500** once
under CI load (not reproducible locally in 12 rapid iterations).
Contention is arguably a retryable 503, and the body carried no
actionable message.
- **A scheduled alert whose source stream is deleted is retried
forever** (`Stream "…" not found in schema`), and the SLO backfill lane
shares the scheduler's worker budget — so accumulated dead alerts
*starve SLO measurement*. Observed: 65 of them held coverage at 1 of 7
chunks indefinitely; deleting them restored 0.143 → 1.0 in 240s.
Harmless in CI (fresh instance per shard) but it degrades any long-lived
environment. The suite now cleans up after itself; the retry-forever
behaviour itself may deserve a look.

**Paired ENT PR: openobserve/o2-enterprise#2434.** ENT's matrix is this
repo's manifest plus an overlay, merged by this repo's
`build-ci-matrix.js`, so both SLO shards reach ENT automatically —
verified: 31 merged shards, both SLO entries carrying
`ingest_allowed_upto=240` and their worker pins, no other shard
affected. What ENT was missing is *consuming* those two fields, which
#2434 adds. Merge the two together: this one alone leaves ENT booting
the SLO shards on the 5-hour ingest window, and #2434 alone is inert.

*(An earlier review reported ENT as using an inline matrix with no SLO
shard — that turned out not to be the case.)*
2026-08-17 18:50:29 +00:00
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