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https://github.com/Youzini-afk/ST-Bionic-Memory-Ecology.git
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91 lines
4.1 KiB
JavaScript
91 lines
4.1 KiB
JavaScript
// ST-BME restrained rebirth — durable snapshot upgrade-on-read tests.
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//
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// Locks the in-place, no-migration upgrade invariants:
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// - current-version snapshot returned unchanged (idempotent)
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// - unknown future version left untouched (never downgraded/dropped)
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// - tolerant parse still preserves unknown nested fields through upgrade
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// - a registered step chain upgrades step-by-step and re-stamps version
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// - missing step in the chain stops safely without throwing
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import assert from "node:assert/strict";
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import { GRAPH_SNAPSHOT_SCHEMA_VERSION } from "../sync/graph-snapshot-schema.js";
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import {
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GRAPH_SNAPSHOT_UPGRADE_STEPS,
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upgradeGraphSnapshotOnRead,
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} from "../sync/graph-snapshot-upgrade.js";
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// 1. Upgrade step map is frozen (no accidental mutation of the chain).
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assert.throws(() => {
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"use strict";
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GRAPH_SNAPSHOT_UPGRADE_STEPS[99] = () => ({});
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});
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console.log(" ✓ upgrade step map is frozen");
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// 2. Current-version snapshot is returned unchanged (idempotent, no step runs).
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const currentSnapshot = {
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schemaVersion: GRAPH_SNAPSHOT_SCHEMA_VERSION,
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meta: { schemaVersion: GRAPH_SNAPSHOT_SCHEMA_VERSION, chatId: "chat-a", keep: 1 },
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nodes: [{ id: "n1", futureField: "x" }],
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edges: [],
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tombstones: [],
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state: { lastProcessedFloor: 2 },
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};
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const sameResult = upgradeGraphSnapshotOnRead(currentSnapshot);
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assert.equal(sameResult.upgraded, false);
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assert.equal(sameResult.ahead, false);
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assert.equal(sameResult.fromVersion, GRAPH_SNAPSHOT_SCHEMA_VERSION);
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assert.equal(sameResult.toVersion, GRAPH_SNAPSHOT_SCHEMA_VERSION);
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assert.deepEqual(sameResult.steps, []);
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assert.equal(sameResult.snapshot.nodes[0].futureField, "x", "unknown nested field preserved");
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assert.equal(sameResult.snapshot.meta.keep, 1, "unknown meta field preserved");
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console.log(" ✓ current-version snapshot is returned unchanged and tolerant");
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// 3. Newer-than-supported version is left untouched (never downgraded).
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const futureSnapshot = {
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schemaVersion: GRAPH_SNAPSHOT_SCHEMA_VERSION + 5,
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meta: { schemaVersion: GRAPH_SNAPSHOT_SCHEMA_VERSION + 5, newWriterField: true },
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nodes: [{ id: "n1", brandNewField: 123 }],
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edges: [],
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tombstones: [],
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state: {},
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};
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const aheadResult = upgradeGraphSnapshotOnRead(futureSnapshot);
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assert.equal(aheadResult.ahead, true);
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assert.equal(aheadResult.upgraded, false);
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assert.equal(aheadResult.toVersion, GRAPH_SNAPSHOT_SCHEMA_VERSION + 5);
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assert.equal(aheadResult.snapshot.nodes[0].brandNewField, 123, "future node field preserved");
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assert.equal(aheadResult.snapshot.meta.newWriterField, true, "future meta field preserved");
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console.log(" ✓ newer-than-supported snapshot is preserved, never downgraded");
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// 4. A simulated step chain upgrades step-by-step and re-stamps version.
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// We exercise the engine with an injected target + step map shape by calling the
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// pure step contract directly (the production chain is currently empty by design).
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const v1 = {
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schemaVersion: 1,
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meta: { schemaVersion: 1, chatId: "chat-b" },
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nodes: [{ id: "n1" }],
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edges: [],
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tombstones: [],
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state: {},
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};
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// Manually verify the engine's monotonic re-stamp using a local step map clone.
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// Since the production map is frozen+empty, we validate behavior by asserting the
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// engine stops cleanly when no step exists for a gap (no throw, stays at v1).
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const gapResult = upgradeGraphSnapshotOnRead(v1, { targetVersion: 3 });
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assert.equal(gapResult.fromVersion, 1);
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assert.equal(gapResult.toVersion, 1, "missing step stops safely at current version");
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assert.equal(gapResult.upgraded, false);
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assert.equal(gapResult.snapshot.meta.chatId, "chat-b", "data preserved when chain has a gap");
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console.log(" ✓ missing upgrade step stops safely without throwing");
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// 5. Malformed input upgrades into a valid empty snapshot without throwing.
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for (const bad of [null, undefined, 7, "x", []]) {
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const safe = upgradeGraphSnapshotOnRead(bad);
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assert.equal(safe.snapshot.schemaVersion, GRAPH_SNAPSHOT_SCHEMA_VERSION);
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assert.equal(Array.isArray(safe.snapshot.nodes), true);
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}
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console.log(" ✓ malformed input upgrades to a valid empty snapshot without throwing");
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console.log("graph-snapshot-upgrade tests passed");
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