fix: 修正共享报工段工时归属拆分

tests/test_report_allocations.py

@@ -47,7 +47,26 @@ def _item(
     )
 
 
-def _report(start_at: datetime, end_at: datetime, item, *, id: int = 1, report_date: date | None = None):
+def _device(scanned_at: datetime):
+    return SimpleNamespace(
+        device_no="23#",
+        process_name="冲压",
+        scanned_at=scanned_at,
+        released_at=None,
+        release_reason=None,
+        sort_order=0,
+    )
+
+
+def _report(
+    start_at: datetime,
+    end_at: datetime,
+    item,
+    *,
+    id: int = 1,
+    report_date: date | None = None,
+    devices: list | None = None,
+):
     return SimpleNamespace(
         id=id,
         attendance_point_name="总厂",
@@ -55,8 +74,8 @@ def _report(start_at: datetime, end_at: datetime, item, *, id: int = 1, report_d
         report_date=report_date or start_at.date(),
         start_at=start_at,
         end_at=end_at,
-        items=[item],
-        session=SimpleNamespace(devices=[]),
+        items=item if isinstance(item, list) else [item],
+        session=SimpleNamespace(devices=devices or []),
     )
 
 
@@ -113,6 +132,42 @@ def test_one_minute_before_night_end_allocates_to_previous_date():
     assert rows[1].reference_wage == 600
 
 
+def test_no_device_shared_full_report_splits_effective_minutes_between_items():
+    first_item = _item(id=1, good_qty=10)
+    second_item = _item(id=2, good_qty=20)
+    report = _report(
+        datetime(2026, 7, 25, 8, 0),
+        datetime(2026, 7, 25, 11, 0),
+        [first_item, second_item],
+    )
+
+    rows = build_report_allocation_drafts(report)
+
+    assert [(row.report_item_id, row.effective_minutes, row.day_minutes) for row in rows] == [
+        (1, 90, 90),
+        (2, 90, 90),
+    ]
+
+
+def test_items_sharing_same_started_at_split_the_segment_minutes():
+    started_at = datetime(2026, 7, 25, 8, 0)
+    first_item = _item(id=1, good_qty=10, started_at=started_at)
+    second_item = _item(id=2, good_qty=20, started_at=started_at)
+    report = _report(
+        started_at,
+        datetime(2026, 7, 25, 11, 0),
+        [first_item, second_item],
+        devices=[_device(started_at)],
+    )
+
+    rows = build_report_allocation_drafts(report)
+
+    assert [(row.report_item_id, row.effective_minutes, row.day_minutes) for row in rows] == [
+        (1, 90, 90),
+        (2, 90, 90),
+    ]
+
+
 def test_zero_effective_minutes_falls_back_to_original_report_date():
     item = _item(good_qty=5, defect_qty=1, scrap_qty=0.5, changeover_count=2, process_unit_price_yuan=3)
     report = _report(