mpackdb

2.2 KB

1. import MPackDB, { PrimaryKeyType } from '../src/MPackDB.js';
2. import { rm } from 'fs/promises';
4. const TEST_DB_PATH = 'db/refresh';
6. console.log('--- Refresh Test ---');
7. console.log('Two DB instances on the same file: one writes/deletes, the other reads.\n');
9. await rm(TEST_DB_PATH, { recursive: true, force: true });
11. // Instance A: the "app"
12. const dbA = new MPackDB(`${TEST_DB_PATH}/users`, { primaryKey: '*id', indexes: ['email'] });
13. await dbA.insert({ email: '[email protected]' });
14. await dbA.insert({ email: '[email protected]' });
15. await dbA.insert({ email: '[email protected]' });
17. // Instance B: the "admin" (read-only, same files, no compaction to avoid breaking A's write stream)
18. const dbB = new MPackDB(`${TEST_DB_PATH}/users`, { primaryKey: '*id', indexes: ['email'], compact: false });
20. // B should see all 3
21. const beforeDelete = await dbB.find();
22. console.log(`B sees ${beforeDelete.length} records before delete (expected: 3)`);
23. console.log(` ${beforeDelete.length === 3 ? '✓ PASS' : '✗ FAIL'}`);
25. // A deletes bob
26. await dbA.delete(r => r.email === '[email protected]');
27. console.log('\nA deleted [email protected]');
29. // B should now see 2 (thanks to refresh)
30. const afterDelete = await dbB.find();
31. console.log(`B sees ${afterDelete.length} records after delete (expected: 2)`);
32. const emails = afterDelete.map(u => u.email);
33. console.log(` emails: ${emails.join(', ')}`);
34. const bobGone = !emails.includes('[email protected]');
35. console.log(` bob gone: ${bobGone ? '✓ PASS' : '✗ FAIL — bob still visible (stale meta)'}`);
37. // A inserts a new record
38. await dbA.insert({ email: '[email protected]' });
39. console.log('\nA inserted [email protected]');
41. // B should see 3 again
42. const afterInsert = await dbB.find();
43. console.log(`B sees ${afterInsert.length} records after insert (expected: 3)`);
44. const emails2 = afterInsert.map(u => u.email);
45. console.log(` emails: ${emails2.join(', ')}`);
46. const daveVisible = emails2.includes('[email protected]');
47. console.log(` dave visible: ${daveVisible ? '✓ PASS' : '✗ FAIL'}`);
49. await dbA.close();
50. await dbB.close();
52. const allPass = beforeDelete.length === 3 && afterDelete.length === 2 && bobGone && afterInsert.length === 3 && daveVisible;
53. console.log(`\n${allPass ? '✓ All refresh tests passed!' : '✗ Some tests FAILED'}`);