mpackdb

1.6 KB

1. import MPackDB, { PrimaryKeyType } from '../src/MPackDB.js';
2. import { rm } from 'fs/promises';
3. import { statSync } from 'fs';
5. const TEST_DB_PATH = 'db/autopersist';
7. console.log('--- Auto-Persist Test ---\n');
9. // Clean up
10. await rm(TEST_DB_PATH, { recursive: true, force: true });
12. // Create DB with low threshold for testing
13. const db = new MPackDB(`${TEST_DB_PATH}/users`, {
14. primaryKey: 'id',
15. primaryKeyType: PrimaryKeyType.NUMBER,
16. indexes: ['id', 'name'],
17. indexPersistThreshold: 5, // Persist after 5 inserts
18. indexPersistInterval: 0 // Disable periodic (only threshold-based)
19. });
21. console.log('1. Insert 3 records (below threshold)');
22. await db.insert({ name: 'Alice', age: 30 });
23. await db.insert({ name: 'Bob', age: 25 });
24. await db.insert({ name: 'Charlie', age: 35 });
26. // Check index files
27. let idIndexSize = statSync(`${TEST_DB_PATH}/users.id.txt`).size;
28. console.log(` Index file size: ${idIndexSize} bytes (should be 0 - not persisted yet)`);
30. console.log('\n2. Insert 3 more records (crosses threshold of 5)');
31. await db.insert({ name: 'Dave', age: 40 });
32. await db.insert({ name: 'Eve', age: 28 });
33. await db.insert({ name: 'Frank', age: 33 });
35. // Wait a bit for async persist
36. await new Promise(resolve => setTimeout(resolve, 100));
38. idIndexSize = statSync(`${TEST_DB_PATH}/users.id.txt`).size;
39. console.log(` Index file size: ${idIndexSize} bytes (should be >0 - auto-persisted!)`);
41. console.log('\n3. Test close() - should persist remaining deltas');
42. await db.insert({ name: 'Grace', age: 29 });
43. await db.close();
45. idIndexSize = statSync(`${TEST_DB_PATH}/users.id.txt`).size;
46. console.log(` Index file size: ${idIndexSize} bytes (should include all 7 records)`);
48. console.log('\n✓ Auto-persist works!');