mpackdb

1.0 KB

1. import MPackDB from '../src/MPackDB.js';
2. import { rm } from 'fs/promises';
4. await rm('find-test', { recursive: true, force: true });
6. const db = new MPackDB('find-test/db', {
7. primaryKey: '*id',
8. indexPersistThreshold: 10000000,
9. indexPersistInterval: 0
10. });
12. console.log('Insert 10000 records...');
13. for (let i = 0; i < 10000; i++) {
14. await db.insert({ value: i });
15. }
17. console.log('Count before delete:');
18. let count1 = 0;
19. for await (const rec of db.find()) count1++;
20. console.log(` Found: ${count1}`);
22. console.log('\nDelete 500 records (ids 1000-1499)...');
23. const toDelete = new Set([...Array.from({length:500}, (_,i) => i+1000)]);
24. await db.delete(r => toDelete.has(r.id));
26. console.log('\nCount after delete:');
27. let count2 = 0;
28. for await (const rec of db.find()) count2++;
29. console.log(` Found: ${count2} (expected 9500)`);
31. console.log('\nCount again:');
32. let count3 = 0;
33. for await (const rec of db.find()) count3++;
34. console.log(` Found: ${count3} (expected 9500)`);
36. await db.close();
37. await rm('find-test', { recursive: true, force: true });