feat: add SEPA direct debit exports and notifications

tests/test_contributions.py

@@ -147,6 +147,36 @@ def test_payment_can_be_split_across_multiple_claims(tmp_path) -> None:
         )
 
 
+def test_combined_dummy_payment_settles_multiple_claims(tmp_path) -> None:
+    repository, member = _repository_with_claim(tmp_path)
+    data = repository.get_contributions(member.member_id)
+    data.claims.append(
+        {
+            "claim_id": "claim-2",
+            "title": "Zweite Forderung",
+            "amount": "50.00",
+            "due_date": "2019-12-31",
+            "status": "open",
+        }
+    )
+    repository.save_contributions(member.member_id, data)
+
+    payment = repository.record_combined_payment(
+        member.member_id,
+        payment_date="2019-12-31",
+        allocations={"claim-1": "100.00", "claim-2": "50.00"},
+        method="dummy",
+        reference="Altbestand",
+    )
+
+    changed = repository.get_contributions(member.member_id)
+    assert payment["amount"] == "150.00"
+    assert payment["method"] == "dummy"
+    assert payment_allocated_total(changed, payment["payment_id"]) == Decimal("150.00")
+    assert all(claim_balance(changed, claim) == 0 for claim in changed.claims)
+    assert repository.get_events(member.member_id)[-1].data["method"] == "dummy"
+
+
 def test_payment_allocation_cannot_overpay_claim(tmp_path) -> None:
     repository, member = _repository_with_claim(tmp_path, amount="12.50")