test(plugin-charts): serve ObjectChart's option-color probe from a double, not the network

[yinlianghui]

Fixes#4106

Test-only. Product code is untouched.

Premise: reproduced, still valid

On origin/main @ 877385a76, both packages' suites from the repo root:

pnpm exec vitest run packages/plugin-charts/ packages/plugin-dashboard/ --maxWorkers=2
Test Files 53 passed (53)
Tests 439 passed (439)
$ grep -c ECONNREFUSED stderr => 24
$ wc -l stderr => 96

Green suite, polluted stderr — the fail-open shape the card described. 96 stderr lines / 8 per error block = 12 escaped requests, 2 ECONNREFUSED lines each = 24. The arithmetic closes before any bisecting starts.

The bisect: one effect, two call sites, 100% of the noise

Per the card's inherited method (and PR #4105's worked example), I instrumented fetch / XMLHttpRequest / EventSource / WebSocket in the root setup file and attributed every escape to its test file rather than bisecting file by file.

escaping file	live requests	endpoint
plugin-charts/src/ObjectChart.drillNavigate.test.tsx	4	/api/v1/meta/object/opportunity
plugin-charts/src/__tests__/ObjectChart.compareTo.test.tsx	4	/api/v1/meta/object/deal
plugin-charts/src/ObjectChart.elementDataSource.test.tsx	3	/api/v1/meta/object/account
plugin-charts/src/ObjectChart.datasetMeasureLabel.test.tsx	1	/api/v1/meta/dataset/showcase_task_metrics
total	12

12 requests x 2 lines = the 24 ECONNREFUSED lines exactly. All attributed, 0 unexplained.

Two findings worth stating plainly, because both differ from what the card assumed:

1. The root cause is confirmed different from plugin-detail 测试套件里有测试向 127.0.0.1:3000 发起真实网络请求（ECONNREFUSED 噪音，未走 MSW） #3339. Nothing here touches useRecordEditable or /api/v1/security/explain. Every escape is ObjectChart's category option-color effect (ObjectChart.tsx:328), which reads the globalfetch at two call sites: line 344 (/api/v1/meta/dataset/..., to learn a dataset's underlying object) and line 352 (/api/v1/meta/object/..., for the field options). The effect is best-effort and swallows every rejection — which is exactly why the suites stayed green while stderr filled up.

2. plugin-dashboard emits zero live requests. The card named both packages, but attribution puts all 12 in plugin-charts. plugin-dashboard resolves the same /api/v1/meta/object/... document in DatasetWidget, and its suite already answers it from a double (DatasetWidget.relabel.test.tsx:70) — which is why it is silent. Nothing to fix there; it is the precedent this PR follows.

Per-file counts are explained too, not just the total: elementDataSource renders 4 tests but its unresolvable-view case never resolves an objectName, so it makes 3 probes; datasetMeasureLabel's single dataset probe fails, so the second (object) hop never runs.

The fix

A recording test double scoped to the four escaping files, following the sibling package's existing pattern and #4105's.

{} as the default answer reproduces the failed request's observable outcome exactly: buildOptionColorMap(undefined) and buildDimensionLabelMap(undefined) both return null (packages/core/src/utils/chart-series.ts:198,275), which is the same state the swallowed rejection's catch branch already set. No existing assertion changes meaning.

No global error swallowing. The double records every URL it is handed, and each file's afterEach fails on anything outside its one expected endpoint — so a NEW escape becomes a failing assertion instead of fresh stderr noise. That guard covers every test in those files, not just the ones that probe today.

Product fallbacks untouched — but the global-fetch read is a genuine product bug, so per the card it is reported rather than silently fixed here: filed as #4114 (ObjectChart never consults SchemaRendererContext.apiFetch, though it already reads that context at line 253, so a hosted console's auth/base-URL channel is bypassed for these two metadata reads). ObjectChart.elementDataSource.test.tsx is the demonstration case — it mounts a real SchemaRendererProvider and the probe still escapes.

No MSW harness stood up, per the card.

Keeping the assertions meaningful

The escaped request was asserted by nobody, and because it always failed, the effect's success path had never once executed in this package's suite. New file ObjectChart.optionColors.test.tsx gives it real coverage from the component's own wiring (the map builders are unit-tested one level down in @object-ui/core; what is new is that ObjectChart asks for the right documents, in the right order, and feeds the results to the renderer):

• an object-bound chart probes its object once and the option colors reach the renderer as categoryColors, keyed by both stored value and display label;
• a dataset-bound chart makes two hops in order — the definition names the object, only then can that object's options be read — and the resulting value/label map is applied to the rows;
• the best-effort contract itself: no options means no categoryColors and no failure.

Verification

Acceptance bar, the card's own command:

Test Files 54 passed (54) # 53 + the new file
Tests 442 passed (442) # 439 + 3 new
$ grep -c ECONNREFUSED stderr => 0
$ wc -l stderr => 0 # stderr entirely empty

Reverse verification, both directions predicted before running:

1. Fix removed (git checkout origin/main -- on the four files, new file held aside) — noise returns at exactly 24ECONNREFUSED, and the suite is still green at 439 tests. Confirms the doubles are what stop it, and that the escape never had a test watching it.
2. New assertion is load-bearing — breaking the product (buildOptionColorMap(undefined) at line 355, so field options are never read) turns it red: AssertionError: expected undefined to be truthy, 1 failed | 2 passed. The other two stay green as predicted, since dimension labels come from a different builder and the no-options case expects undefined either way. Restored afterwards; git diff HEAD -- packages/plugin-charts/src/ObjectChart.tsx is empty.

Gates: pnpm --filter @object-ui/plugin-charts type-check green (after pnpm --filter '@object-ui/plugin-charts^...' build — the fresh-worktree dependency closure), eslint on all five files 0 errors (15 pre-existing no-explicit-any warnings, same style as the surrounding mocks), control-byte self-scan clean. scripts/check-changeset-presence.mjs arbitrated and required the empty-frontmatter changeset for a test-only change — its sanctioned pass, not a workaround; check-changeset-no-major.mjs green. (skip-changeset is not a real label in this repo, per objectui#3724.)

Deliberately not in this PR

• The apiFetch bypass (ObjectChart's option-color / dimension-label probe reads the global fetch, bypassing the host's apiFetch channel #4114) — a product contract change, out of scope for a hygiene card.
• plugin-dashboard — verified clean by attribution rather than assumed; adding doubles there would be theatre.

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✅ Console Performance Budget

Metric	Value	Budget
Main entry (gzip)	28.3 KB	350 KB
Entry file	index-BG4s-BOk.js	—
Status	PASS	—

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Size Limits

• ✅ Core packages should be < 50KB gzipped
• ✅ Component packages should be < 100KB gzipped
• ⚠️ Plugin packages should be < 150KB gzipped