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core/tests/engine/key-collision.test.js
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import { describe, test } from 'node:test';
import assert from 'node:assert/strict';
import { UnifiedKeyManager } from '../../src/core/UnifiedKeyManager.js';
describe('UnifiedKeyManager key uniqueness', () => {
test('composite keys differ for distinct small tuples', () => {
const keyManager = new UnifiedKeyManager();
const keyA = keyManager.createCompositeKey(1, 'rel', 2);
const keyB = keyManager.createCompositeKey(2, 'rel', 2);
const keyC = keyManager.createCompositeKey(1, 'rel', 3);
assert.notStrictEqual(keyA, keyB);
assert.notStrictEqual(keyA, keyC);
});
test('composite keys remain unique for large ids', () => {
const keyManager = new UnifiedKeyManager();
const relation = 'rel';
const srcIdA = 1;
const srcIdB = 1 + (1 << 18);
const dstId = 1;
const keyA = keyManager.createCompositeKey(srcIdA, relation, dstId);
const keyB = keyManager.createCompositeKey(srcIdB, relation, dstId);
assert.notStrictEqual(keyA, keyB);
});
test('source-relation keys remain unique for large ids', () => {
const keyManager = new UnifiedKeyManager();
const relation = 'rel';
const srcIdA = 1;
const srcIdB = 1 + (1 << 16);
const keyA = keyManager.createSrcRelKey(srcIdA, relation);
const keyB = keyManager.createSrcRelKey(srcIdB, relation);
assert.notStrictEqual(keyA, keyB);
});
test('chain keys remain unique for large ids', () => {
const keyManager = new UnifiedKeyManager();
const steps = [{ relation: 'rel', direction: 'out' }];
const userIdA = 1;
const userIdB = 1 + (1 << 18);
const objectId = 42;
const keyA = keyManager.createChainKey(userIdA, objectId, steps);
const keyB = keyManager.createChainKey(userIdB, objectId, steps);
assert.notStrictEqual(keyA, keyB);
});
});