feat: delete command — batch delete from CSV with confirmation

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

tests/test_delete.py

@@ -0,0 +1,67 @@
+from datetime import datetime, timezone
+from unittest.mock import MagicMock
+
+from order_bak.csv_utils import write_csv
+from order_bak.delete import delete_orders
+
+
+def _make_entity(pk, rk):
+    return {
+        "PartitionKey": pk,
+        "RowKey": rk,
+        "OrderTime": datetime(2025, 1, 1, tzinfo=timezone.utc),
+        "ReceiveTime": None,
+        "revenue": 10.0,
+        "platformOrder": "p",
+        "prodCount": 1,
+        "pfId": pk,
+        "prodId": "prod",
+        "prodPrice": 10.0,
+        "state": 1,
+        "ver": 3,
+        "customData": None,
+    }
+
+
+def test_delete_groups_by_partition_and_batches(tmp_path):
+    entities = []
+    for i in range(3):
+        entities.append(_make_entity("user1", f"order{i}"))
+    for i in range(3, 5):
+        entities.append(_make_entity("user2", f"order{i}"))
+
+    csv_path = tmp_path / "2025-01-01.csv"
+    write_csv(csv_path, entities)
+
+    mock_table = MagicMock()
+
+    deleted_count = delete_orders(
+        table_client=mock_table,
+        csv_path=csv_path,
+        batch_size=2,
+        delay_ms=0,
+    )
+
+    assert deleted_count == 5
+    # user1: 3 entities, batch_size=2 -> 2 batches (2 + 1)
+    # user2: 2 entities, batch_size=2 -> 1 batch
+    assert mock_table.submit_transaction.call_count == 3
+
+
+def test_delete_respects_batch_size(tmp_path):
+    entities = [_make_entity("user1", f"order{i}") for i in range(5)]
+
+    csv_path = tmp_path / "2025-01-01.csv"
+    write_csv(csv_path, entities)
+
+    mock_table = MagicMock()
+
+    deleted_count = delete_orders(
+        table_client=mock_table,
+        csv_path=csv_path,
+        batch_size=2,
+        delay_ms=0,
+    )
+
+    assert deleted_count == 5
+    assert mock_table.submit_transaction.call_count == 3  # 2+2+1