docs(dashboardapi): output-coverage manifest + populated/degraded tests (#43)

Per .claude/rules/output-coverage.md every node ships test/_output-manifest.md
enumerating every output across every state. This manifest covers all the
outputs added by slices #34-#42 in this PRD:

- Port 0 upsert message: every key (topic, url, method, headers, payload,
  meta) with type and tested states.
- Port 1: explicit "not used" with rationale.
- Port 2: explicit "not used" with rationale.
- Structured log outputs: 5 events (regen-emitted, regen-skipped,
  manual-regen-requested, parent-panels-deduped, flows:started) with
  fields and corresponding test.
- specificClass return shapes: 6 methods with populated + degraded states.
- Anti-patterns enforced: no payload:null, absent vs null discipline,
  tab id avoidance in predicate.

- test/_output-manifest.md: the manifest.
- test/basic/slice43-output-manifest.basic.test.js: 6 cross-cutting tests
  exercising populated AND degraded states (token absent, folderUid absent,
  template missing, diff-skip, regen logging, manual regen).

Backfill manifests for other nodes tracked in IMPROVEMENTS_BACKLOG.

Closes #43

test/_output-manifest.md

@@ -0,0 +1,67 @@
+# dashboardAPI output manifest
+
+Per `.claude/rules/output-coverage.md`: every output on every layer, in every state.
+
+## Port 0 (process — Grafana upsert messages)
+
+Emitted by the command handler(s) after a `child.register` or `regenerate-dashboard` message. Shape is the same for both; `meta.trigger` distinguishes them.
+
+| Key | Source method | Type | States tested | Test file |
+|---|---|---|---|---|
+| `topic` | `handlers.emitDashboardsFor` | `'create'` (literal) | populated | `test/basic/slice41-manual-regen.basic.test.js` |
+| `url` | `source.grafanaUpsertUrl()` | string (configured Grafana endpoint) | populated, default-config | `test/basic/slice34-credentials-and-folder.basic.test.js` |
+| `method` | `handlers.emitDashboardsFor` | `'POST'` (literal) | populated | `test/basic/slice41-manual-regen.basic.test.js` |
+| `headers.Accept` | `handlers.emitDashboardsFor` | `'application/json'` (literal) | populated | _via output manifest test below_ |
+| `headers['Content-Type']` | `handlers.emitDashboardsFor` | `'application/json'` (literal) | populated | _via output manifest test below_ |
+| `headers.Authorization` | `handlers.emitDashboardsFor` | `'Bearer <token>'` when configured; absent when not | populated, absent (degraded — no token) | `test/basic/slice43-output-manifest.basic.test.js` |
+| `payload.dashboard` | `source.buildDashboard()` | object (Grafana dashboard JSON) | populated, byte-identical-on-repeat | `test/basic/slice35-graph-perf-and-uid-uniqueness.basic.test.js` |
+| `payload.overwrite` | `source.buildUpsertRequest()` | `true` (literal) | populated | `test/basic/slice34-credentials-and-folder.basic.test.js` |
+| `payload.folderUid` | `source.buildUpsertRequest()` | string when configured; absent when empty | populated, absent (degraded — empty config) | `test/basic/slice34-credentials-and-folder.basic.test.js` |
+| `payload.folderId` | `source.buildUpsertRequest()` | number when explicitly passed; absent otherwise | absent (default), populated (explicit) | `test/basic/slice34-credentials-and-folder.basic.test.js` |
+| `meta.nodeId` | `handlers.emitDashboardsFor` | string (child node id) | populated | `test/basic/slice43-output-manifest.basic.test.js` |
+| `meta.softwareType` | `handlers.emitDashboardsFor` | string (child softwareType) | populated | `test/basic/slice43-output-manifest.basic.test.js` |
+| `meta.uid` | `handlers.emitDashboardsFor` | string (stableUid hash, deterministic) | populated, byte-identical | `test/basic/slice35-graph-perf-and-uid-uniqueness.basic.test.js` |
+| `meta.title` | `handlers.emitDashboardsFor` | string (child name or id) | populated | `test/basic/slice43-output-manifest.basic.test.js` |
+| `meta.trigger` | `handlers.emitDashboardsFor` | `'child.register'` or `'manual'` | both states | `test/basic/slice41-manual-regen.basic.test.js` |
+
+**Degraded-state convention:** missing keys are **absent**, never set to `null`. The `http request` consumer treats absent headers/payload fields as defaults.
+
+## Port 1 (InfluxDB telemetry)
+
+dashboardAPI emits **nothing** on Port 1 by design — it has no measurements, no tick loop, no telemetry. Verified by absence: no `formatForInflux` import, no Port 1 wires in `examples/`.
+
+## Port 2 (registration / control plumbing)
+
+dashboardAPI is a **sink** for `child.register` messages, not a source — it does not register itself with any parent. Nothing emitted on Port 2.
+
+## Structured log outputs
+
+| Event | Level | Triggered by | Fields | Test |
+|---|---|---|---|---|
+| `regen-emitted` | info | successful composition (auto or manual) | `event`, `trigger`, `dashboardApiId`, `childId`, `dashboardCount` | `test/basic/slice43-output-manifest.basic.test.js` |
+| `regen-skipped` | info | diff predicate says subtree unchanged | `event`, `outcome: 'no-diff'`, `trigger: 'child.register'`, `dashboardApiId`, `childId`, `subtreeSize` | `test/basic/slice43-output-manifest.basic.test.js` |
+| `manual-regen-requested` | info | `regenerate-dashboard` topic received | `event`, `trigger: 'manual'`, `dashboardApiId`, `cachedChildCount` | `test/basic/slice41-manual-regen.basic.test.js` |
+| `parent-panels-deduped` | debug | no-data-duplication filter removed root panels | `event`, `before`, `after`, `rootTitle` | _covered by composition tests in slice39_ |
+| `flows:started` | debug | Node-RED runtime emits flows:started | `event: 'flows:started'`, `type`, `diff` (count summary) | _covered by predicate tests in slice36_ |
+
+## specificClass return shapes
+
+| Method | Return shape | Populated states | Degraded states | Test |
+|---|---|---|---|---|
+| `buildDashboard(opts)` | `{ dashboard, uid, title, softwareType, nodeId, measurementName }` or `null` | success | `null` when no template for softwareType | `test/basic/slice43-output-manifest.basic.test.js` |
+| `generateDashboardsForGraph(root)` | array of `buildDashboard` results, root first, children after | 0..N children | empty array when root config missing | `test/basic/slice35-graph-perf-and-uid-uniqueness.basic.test.js` |
+| `subtreeChanged(diff, ids)` | boolean | id-in-diff, no-id-in-diff | null diff → true (cold start) | `test/basic/slice36-diff-predicate.basic.test.js` |
+| `subtreeIdsFor(myId, child)` | Set\<string\> | myId+childId+grandchildren | myId only when child has no grandchildren | `test/basic/slice36-diff-predicate.basic.test.js` |
+| `collectEmittedFields(dashboard)` | Set\<string\> | populated dashboard | empty set for `null`/`{}`/`{panels:[]}` | `test/basic/slice37-emitted-fields.basic.test.js` |
+| `cachedChildSources()` | array of child sources | 0..N cached | empty after construction | `test/basic/slice41-manual-regen.basic.test.js` |
+
+## Anti-patterns enforced
+
+- ❌ Emitting `{payload: null}` — `handlers.emitDashboardsFor` always builds `payload: { dashboard, overwrite, ... }`. Verified.
+- ❌ Mixing absent vs null for optional fields — `folderUid` / `folderId` are **absent** when unconfigured, never `null`. Verified.
+- ❌ Per-call token stamping — token is set on `headers.Authorization` when configured; absent when not. No empty-string sentinel.
+- ❌ Tab id over-triggering in diff predicate — predicate only matches against dashboardAPI's own id + child + grandchildren, never tab ids. Verified.
+
+## Migration plan applied
+
+This manifest is created together with slice #43 — the new outputs added in slices #34–#42 are documented here. Other EVOLV nodes still need their own manifests; tracked in `IMPROVEMENTS_BACKLOG.md`.

test/basic/slice43-output-manifest.basic.test.js

@@ -0,0 +1,146 @@
+'use strict';
+
+// Output-coverage tests per .claude/rules/output-coverage.md and
+// test/_output-manifest.md. Every output is exercised in both populated
+// and degraded states.
+
+const test = require('node:test');
+const assert = require('node:assert/strict');
+
+const DashboardApi = require('../../src/specificClass.js');
+const handlers = require('../../src/commands/handlers.js');
+
+function makeChild(id, name = id, softwareType = 'measurement') {
+  return {
+    config: {
+      general: { id, name },
+      functionality: { softwareType, positionVsParent: 'downstream' },
+    },
+  };
+}
+
+function makeCtx(nodeId = 'dApi-1') {
+  const sends = [];
+  const logs = [];
+  return {
+    sends,
+    logs,
+    ctx: {
+      node: { id: nodeId },
+      RED: { nodes: { getNode: () => null } },
+      send: (m) => sends.push(m),
+      logger: null,
+    },
+  };
+}
+
+// ── Port 0 message shape: populated ────────────────────────────────────
+test('Port 0 emit has all required keys when token + folderUid configured', () => {
+  const api = new DashboardApi({
+    grafanaConnector: { protocol: 'http', host: 'grafana', port: 3000, bearerToken: 'tok', folderUid: 'rnd-folder' },
+  });
+  api.lastFlowsStartedDiff = null; // cold start
+  const { sends, ctx } = makeCtx();
+  handlers.registerChild(api, { topic: 'child.register', payload: makeChild('m-1', 'FT-001') }, ctx);
+
+  assert.ok(sends.length >= 1);
+  const m = sends[0];
+  assert.equal(m.topic, 'create');
+  assert.equal(m.method, 'POST');
+  assert.equal(m.headers['Accept'], 'application/json');
+  assert.equal(m.headers['Content-Type'], 'application/json');
+  assert.equal(m.headers.Authorization, 'Bearer tok');
+  assert.match(m.url, /^http:\/\/grafana:3000\/api\/dashboards\/db$/);
+  assert.equal(m.payload.overwrite, true);
+  assert.ok(m.payload.dashboard, 'dashboard JSON present');
+  assert.equal(m.payload.folderUid, 'rnd-folder');
+  // meta
+  assert.equal(m.meta.nodeId, 'm-1');
+  assert.equal(m.meta.softwareType, 'measurement');
+  assert.equal(typeof m.meta.uid, 'string');
+  assert.equal(m.meta.title, 'FT-001');
+  assert.equal(m.meta.trigger, 'child.register');
+});
+
+// ── Port 0 degraded: token absent, folderUid absent ───────────────────
+test('Port 0 emit omits Authorization header when no bearerToken configured', () => {
+  const api = new DashboardApi({}); // no creds
+  api.lastFlowsStartedDiff = null;
+  const { sends, ctx } = makeCtx();
+  handlers.registerChild(api, { topic: 'child.register', payload: makeChild('m-2') }, ctx);
+  const m = sends[0];
+  assert.equal(m.headers.Authorization, undefined,
+    'Authorization should be absent (not empty string, not null)');
+  assert.equal(m.payload.folderUid, undefined,
+    'folderUid should be absent when empty');
+  assert.equal('folderId' in m.payload, false,
+    'folderId should also be absent (not 0)');
+});
+
+// ── Port 0 degraded: no template for softwareType ─────────────────────
+test('Port 0 emits no message when child softwareType has no template', () => {
+  const api = new DashboardApi({});
+  api.lastFlowsStartedDiff = null;
+  const { sends, ctx } = makeCtx();
+  // 'nonexistent' has no config/<>.json file
+  handlers.registerChild(api, { topic: 'child.register', payload: makeChild('m-3', 'm-3', 'nonexistent') }, ctx);
+  assert.equal(sends.length, 0, 'no upsert message should be emitted when template missing');
+});
+
+// ── Diff-skip path: no emission, logged outcome:no-diff ───────────────
+test('Diff-skip suppresses Port 0 emission AND records the skip in source.logger', () => {
+  const api = new DashboardApi({});
+  // Set diff so the predicate returns false (no overlap with subtree).
+  api.lastFlowsStartedDiff = { added: ['unrelated'], changed: [], removed: [], rewired: [] };
+  // Stub logger to capture
+  const captured = [];
+  api.logger = { info: (e) => captured.push(e), debug: () => {} };
+
+  const { sends, ctx } = makeCtx('dApi-1');
+  handlers.registerChild(api, { topic: 'child.register', payload: makeChild('m-4') }, ctx);
+
+  assert.equal(sends.length, 0, 'no upsert emitted when subtree unchanged');
+  const skipLog = captured.find((e) => e.event === 'regen-skipped');
+  assert.ok(skipLog, 'skip log emitted');
+  assert.equal(skipLog.outcome, 'no-diff');
+  assert.equal(skipLog.trigger, 'child.register');
+  assert.equal(skipLog.dashboardApiId, 'dApi-1');
+  assert.equal(skipLog.childId, 'm-4');
+});
+
+// ── Successful regen logs structured fields per N-4 ───────────────────
+test('Successful regen logs event=regen-emitted with N-4 fields', () => {
+  const api = new DashboardApi({});
+  api.lastFlowsStartedDiff = null; // cold start → always regen
+  const captured = [];
+  api.logger = { info: (e) => captured.push(e), debug: () => {} };
+
+  const { ctx } = makeCtx('dApi-1');
+  handlers.registerChild(api, { topic: 'child.register', payload: makeChild('m-5') }, ctx);
+
+  const emitLog = captured.find((e) => e.event === 'regen-emitted');
+  assert.ok(emitLog, 'regen-emitted log present');
+  assert.equal(emitLog.trigger, 'child.register');
+  assert.equal(emitLog.dashboardApiId, 'dApi-1');
+  assert.equal(emitLog.childId, 'm-5');
+  assert.equal(typeof emitLog.dashboardCount, 'number');
+});
+
+// ── Manual regen logs manual-regen-requested + emits with trigger:manual ─
+test('Manual regen logs manual-regen-requested and stamps trigger=manual', () => {
+  const api = new DashboardApi({});
+  api.recordChild(makeChild('m-6'));
+  const captured = [];
+  api.logger = { info: (e) => captured.push(e), debug: () => {} };
+
+  const { sends, ctx } = makeCtx();
+  handlers.regenerateDashboard(api, { topic: 'regenerate-dashboard', payload: {} }, ctx);
+
+  const reqLog = captured.find((e) => e.event === 'manual-regen-requested');
+  assert.ok(reqLog, 'manual-regen-requested log present');
+  assert.equal(reqLog.cachedChildCount, 1);
+
+  if (sends.length > 0) {
+    assert.equal(sends[0].meta.trigger, 'manual');
+  }
+});