| 10 | ) |
| 11 | |
| 12 | func TestSnapshot(t *testing.T) { |
| 13 | tempDir := t.TempDir() |
| 14 | cfg := &config.Config{ |
| 15 | LevelDB: config.LevelDBConfig{ |
| 16 | CacheSize: 64 * 1024 * 1024, |
| 17 | BlockSize: 4 * 1024, |
| 18 | WriteBufferSize: 4 * 1024 * 1024, |
| 19 | MaxOpenFiles: 1000, |
| 20 | Compression: true, |
| 21 | }, |
| 22 | } |
| 23 | |
| 24 | db, err := Store{}.Open(tempDir, cfg) |
| 25 | require.NoError(t, err) |
| 26 | defer db.Close() |
| 27 | |
| 28 | // Insert initial data |
| 29 | initialData := map[string]string{ |
| 30 | "key1": "value1", |
| 31 | "key2": "value2", |
| 32 | "key3": "value3", |
| 33 | } |
| 34 | |
| 35 | for k, v := range initialData { |
| 36 | err = db.Put([]byte(k), []byte(v)) |
| 37 | require.NoError(t, err) |
| 38 | } |
| 39 | |
| 40 | // Create snapshot |
| 41 | snapshot, err := db.NewSnapshot() |
| 42 | require.NoError(t, err) |
| 43 | defer snapshot.Close() |
| 44 | |
| 45 | // Modify data after snapshot |
| 46 | modifiedData := map[string]string{ |
| 47 | "key1": "new-value1", |
| 48 | "key4": "value4", // New key |
| 49 | } |
| 50 | |
| 51 | for k, v := range modifiedData { |
| 52 | err = db.Put([]byte(k), []byte(v)) |
| 53 | require.NoError(t, err) |
| 54 | } |
| 55 | |
| 56 | // Delete a key |
| 57 | err = db.Delete([]byte("key2")) |
| 58 | require.NoError(t, err) |
| 59 | |
| 60 | // Snapshot should see original data |
| 61 | for k, expectedValue := range initialData { |
| 62 | value, err := snapshot.Get([]byte(k)) |
| 63 | require.NoError(t, err) |
| 64 | assert.Equal(t, []byte(expectedValue), value, "Snapshot should see original value for key %s", k) |
| 65 | } |
| 66 | |
| 67 | // Snapshot should not see new data |
| 68 | value, err := snapshot.Get([]byte("key4")) |
| 69 | require.NoError(t, err) |