✨(backend) add unit tests for the api view for reconciliation requests

This adds unit tests for the new API view that is used when a confirmation
link is clicked in an email.

src/backend/core/tests/test_api_user_reconciliation.py

@@ -0,0 +1,85 @@
+"""
+Unit tests for the ReconciliationConfirmView API view.
+"""
+
+import uuid
+
+from django.conf import settings
+
+import pytest
+from rest_framework.test import APIClient
+
+from core import factories, models
+
+pytestmark = pytest.mark.django_db
+
+
+def test_reconciliation_confirm_view_sets_active_checked():
+    """GETting the active confirmation endpoint should set active_email_checked."""
+    user = factories.UserFactory(email="[email protected]")
+    other = factories.UserFactory(email="[email protected]")
+    rec = models.UserReconciliation.objects.create(
+        active_email=user.email,
+        inactive_email=other.email,
+        active_user=user,
+        inactive_user=other,
+        active_email_checked=False,
+        inactive_email_checked=False,
+        status="ready",
+    )
+
+    client = APIClient()
+    conf_id = rec.active_email_confirmation_id
+    url = f"/api/{settings.API_VERSION}/user-reconciliations/active/{conf_id}/"
+    resp = client.get(url)
+    assert resp.status_code == 200
+    assert resp.json() == {"detail": "Confirmation received"}
+
+    rec.refresh_from_db()
+    assert rec.active_email_checked is True
+
+
+def test_reconciliation_confirm_view_sets_inactive_checked():
+    """GETting the inactive confirmation endpoint should set inactive_email_checked."""
+    user = factories.UserFactory(email="[email protected]")
+    other = factories.UserFactory(email="[email protected]")
+    rec = models.UserReconciliation.objects.create(
+        active_email=user.email,
+        inactive_email=other.email,
+        active_user=user,
+        inactive_user=other,
+        active_email_checked=False,
+        inactive_email_checked=False,
+        status="ready",
+    )
+
+    client = APIClient()
+    conf_id = rec.inactive_email_confirmation_id
+    url = f"/api/{settings.API_VERSION}/user-reconciliations/inactive/{conf_id}/"
+    resp = client.get(url)
+    assert resp.status_code == 200
+    assert resp.json() == {"detail": "Confirmation received"}
+
+    rec.refresh_from_db()
+    assert rec.inactive_email_checked is True
+
+
+def test_reconciliation_confirm_view_invalid_user_type_returns_400():
+    """GETting with an invalid user_type should return 400."""
+    client = APIClient()
+    # Use a valid uuid format but invalid user_type
+
+    url = f"/api/{settings.API_VERSION}/user-reconciliations/other/{uuid.uuid4()}/"
+    resp = client.get(url)
+    assert resp.status_code == 400
+    assert resp.json() == {"detail": "Invalid user_type"}
+
+
+def test_reconciliation_confirm_view_not_found_returns_404():
+    """GETting with a non-existing confirmation_id should return 404."""
+    client = APIClient()
+
+    url = f"/api/{settings.API_VERSION}/user-reconciliations/active/{uuid.uuid4()}/"
+    resp = client.get(url)
+    assert resp.status_code == 404
+    assert resp.json() == {"detail": "Reconciliation entry not found"}