TEST: add hold invoices to test helpers and a basic test (#1838)

* add hold invoices and basic test

* run request in parallel

* create_task

* dont cancel it

---------

Co-authored-by: callebtc <93376500+callebtc@users.noreply.github.com>

tests/core/views/test_api.py

@@ -13,7 +13,12 @@ from lnbits.db import DB_TYPE, SQLITE
 from lnbits.wallets import get_wallet_class
 from tests.conftest import CreateInvoiceData, api_payments_create_invoice
 
-from ...helpers import get_random_invoice_data, is_fake, pay_real_invoice
+from ...helpers import (
+    get_random_invoice_data,
+    is_fake,
+    pay_real_invoice,
+    settle_invoice,
+)
 
 WALLET = get_wallet_class()
 
@@ -459,6 +464,30 @@ async def test_pay_real_invoice_set_pending_and_check_state(
     assert payment_not_pending.pending is False
 
 
+@pytest.mark.asyncio
+@pytest.mark.skipif(is_fake, reason="this only works in regtest")
+async def test_pay_hold_invoice(client, hold_invoice, adminkey_headers_from):
+    preimage, invoice = hold_invoice
+    task = asyncio.create_task(
+        client.post(
+            "/api/v1/payments",
+            json={"bolt11": invoice["payment_request"]},
+            headers=adminkey_headers_from,
+        )
+    )
+    await asyncio.sleep(1)
+
+    # TODO: Proper test calle :)
+    # settle hold invoice
+    settle_invoice(preimage)
+
+    response = await task
+    assert response.status_code < 300
+    # check if paid
+    # randomly cancel invoice
+    # cancel_invoice(invoice["payment_hash"])
+
+
 @pytest.mark.asyncio
 @pytest.mark.skipif(is_fake, reason="this only works in regtest")
 async def test_receive_real_invoice_set_pending_and_check_state(