feat: backup command — filter scan CSV by state and date range

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tests/test_backup.py

@@ -0,0 +1,58 @@
+from datetime import datetime, timezone
+from pathlib import Path
+
+from order_bak.csv_utils import write_csv
+from order_bak.backup import backup_orders
+
+
+def _make_entity(pk, rk, order_time, state, receive_time=None):
+    return {
+        "PartitionKey": pk,
+        "RowKey": rk,
+        "OrderTime": order_time,
+        "ReceiveTime": receive_time,
+        "revenue": 10.0,
+        "platformOrder": "plat1",
+        "prodCount": 1,
+        "pfId": pk,
+        "prodId": "prod1",
+        "prodPrice": 10.0,
+        "state": state,
+        "ver": 3,
+        "customData": None,
+    }
+
+
+def test_backup_filters_by_state_and_date(tmp_path):
+    scan_dir = tmp_path / "scan"
+    backup_dir = tmp_path / "backups"
+    scan_dir.mkdir()
+    backup_dir.mkdir()
+
+    entities = [
+        _make_entity("u1", "o1", datetime(2025, 1, 1, 10, tzinfo=timezone.utc), 1),
+        _make_entity("u2", "o2", datetime(2025, 1, 1, 12, tzinfo=timezone.utc), 0),  # Payed, skip
+        _make_entity("u3", "o3", datetime(2025, 1, 2, 8, tzinfo=timezone.utc), 1),
+        _make_entity("u4", "o4", datetime(2025, 1, 3, 8, tzinfo=timezone.utc), 1),  # outside range
+    ]
+    scan_csv = scan_dir / "scan-2025-01-03.csv"
+    write_csv(scan_csv, entities)
+
+    result = backup_orders(
+        scan_path=scan_csv,
+        backup_dir=backup_dir,
+        start=datetime(2025, 1, 1, tzinfo=timezone.utc),
+        end=datetime(2025, 1, 3, tzinfo=timezone.utc),
+    )
+
+    assert result == 2
+    jan1 = backup_dir / "2025-01-01.csv"
+    jan2 = backup_dir / "2025-01-02.csv"
+    assert jan1.exists()
+    assert jan2.exists()
+    assert not (backup_dir / "2025-01-03.csv").exists()
+
+    from order_bak.csv_utils import read_csv
+    jan1_rows = list(read_csv(jan1))
+    assert len(jan1_rows) == 1
+    assert jan1_rows[0]["RowKey"] == "o1"