import pytest
from modules.invoicing.serializers import InvoiceSerializer
from unittest.mock import MagicMock

@pytest.mark.django_db
def test_invoice_serializer_valid(regular_user, test_client):
    data = {
        "client": test_client.id,
        "due_date": "2026-12-31",
        "status": "draft",
        "items": [
            {"description": "Servis", "quantity": 1, "unit_price": 100.00}
        ]
    }
    # Context je ključan za pristup useru
    request = MagicMock()
    request.user = regular_user
    serializer = InvoiceSerializer(data=data, context={'request': request})
    
    assert serializer.is_valid(), serializer.errors
    invoice = serializer.save()
    assert invoice.amount == 100.00