| 9 | ) |
| 10 | |
| 11 | func TestIterator(t *testing.T) { |
| 12 | tempDir := t.TempDir() |
| 13 | cfg := &config.Config{ |
| 14 | LevelDB: config.LevelDBConfig{ |
| 15 | CacheSize: 64 * 1024 * 1024, |
| 16 | BlockSize: 4 * 1024, |
| 17 | WriteBufferSize: 4 * 1024 * 1024, |
| 18 | MaxOpenFiles: 1000, |
| 19 | Compression: true, |
| 20 | }, |
| 21 | } |
| 22 | |
| 23 | db, err := Store{}.Open(tempDir, cfg) |
| 24 | require.NoError(t, err) |
| 25 | defer db.Close() |
| 26 | |
| 27 | // Insert test data |
| 28 | testData := []struct { |
| 29 | key string |
| 30 | value string |
| 31 | }{ |
| 32 | {"a", "1"}, |
| 33 | {"b", "2"}, |
| 34 | {"c", "3"}, |
| 35 | {"d", "4"}, |
| 36 | } |
| 37 | |
| 38 | for _, item := range testData { |
| 39 | err = db.Put([]byte(item.key), []byte(item.value)) |
| 40 | require.NoError(t, err) |
| 41 | } |
| 42 | |
| 43 | // Test forward iteration |
| 44 | iter := db.NewIterator() |
| 45 | defer iter.Close() |
| 46 | |
| 47 | // Test First |
| 48 | iter.First() |
| 49 | assert.True(t, iter.Valid()) |
| 50 | assert.Equal(t, "a", string(iter.Key())) |
| 51 | assert.Equal(t, "1", string(iter.Value())) |
| 52 | |
| 53 | // Test Next |
| 54 | iter.Next() |
| 55 | assert.True(t, iter.Valid()) |
| 56 | assert.Equal(t, "b", string(iter.Key())) |
| 57 | assert.Equal(t, "2", string(iter.Value())) |
| 58 | |
| 59 | // Test Last |
| 60 | iter.Last() |
| 61 | assert.True(t, iter.Valid()) |
| 62 | assert.Equal(t, "d", string(iter.Key())) |
| 63 | assert.Equal(t, "4", string(iter.Value())) |
| 64 | |
| 65 | // Test Prev |
| 66 | iter.Prev() |
| 67 | assert.True(t, iter.Valid()) |
| 68 | assert.Equal(t, "c", string(iter.Key())) |