Basic test for the create_with_products endpoint

needs some additional tests, but need to switch gears for a bit

payments/views/v0/v0_test.py

@@ -0,0 +1,33 @@
+"""View tests for the v0 API."""
+
+import pytest
+
+from payments.factories import ProductFactory
+from payments.models import Basket
+from system_meta.factories import ActiveIntegratedSystemFactory
+
+pytestmark = pytest.mark.django_db
+
+
+def test_create_basket_with_products(mocker, user_client):
+    """Test creating a basket with products."""
+
+    mocker.patch("payments.api.send_pre_sale_webhook")
+    system = ActiveIntegratedSystemFactory()
+    products = ProductFactory.create_batch(size=2, system=system)
+
+    url = "/api/v0/payments/baskets/create_with_products/"
+    response = user_client.post(
+        url,
+        data={
+            "system_slug": system.slug,
+            "skus": [{"sku": product.sku, "quantity": 1} for product in products],
+        },
+    )
+    assert response.status_code in (
+        200,
+        201,
+    )
+
+    basket_id = response.data["id"]
+    assert Basket.objects.get(id=basket_id).basket_items.count() == 2