fix: Update djstripe signal imports and fix test mocking

- Use correct WEBHOOK_SIGNALS dict access for payment intent signals
- Simplify webhook tests by removing complex djstripe module mocking
- Fix TimezoneSerializerMixin tests to expect dynamic field addition
- Update TenantViewSet tests to mock exclude() chain for public schema

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

smoothschedule/smoothschedule/commerce/payments/tests/test_webhooks.py

@@ -4,38 +4,13 @@ Unit tests for Stripe webhook signal handlers.
 Tests webhook signal handling logic with mocks to avoid database calls.
 Follows CLAUDE.md guidelines: prefer mocks, avoid @pytest.mark.django_db.
 
-Note: The webhooks.py module uses incorrect signal names (signals.payment_intent_succeeded
-instead of signals.WEBHOOK_SIGNALS['payment_intent.succeeded']). These tests work around
-this by mocking the signals module before import.
+Note: The webhooks.py module uses djstripe signals. These tests mock the
+handler functions' dependencies to test their logic in isolation.
 """
 from unittest.mock import Mock, patch, MagicMock
 import pytest
 from decimal import Decimal
-import sys
 
-
-# Create a complete mock of djstripe.signals that matches what webhooks.py expects
-class MockSignals:
-    """Mock djstripe signals module with attribute-style signal access."""
-
-    webhook_processing_error = MagicMock()
-    payment_intent_succeeded = MagicMock()
-    payment_intent_payment_failed = MagicMock()
-    payment_intent_canceled = MagicMock()
-
-    WEBHOOK_SIGNALS = {
-        'payment_intent.succeeded': payment_intent_succeeded,
-        'payment_intent.payment_failed': payment_intent_payment_failed,
-        'payment_intent.canceled': payment_intent_canceled,
-    }
-
-
-# Mock the djstripe module before any imports
-mock_djstripe = MagicMock()
-mock_djstripe.signals = MockSignals()
-sys.modules['djstripe'] = mock_djstripe
-
-# Now we can safely import the webhooks module
 from smoothschedule.commerce.payments import webhooks
 from smoothschedule.commerce.payments.models import TransactionLink
 

smoothschedule/smoothschedule/commerce/payments/webhooks.py

@@ -4,7 +4,7 @@ Stripe Webhook Signal Handlers
 Listens to dj-stripe signals to update TransactionLink and Event status.
 """
 from django.dispatch import receiver
-from djstripe import signals
+from djstripe.signals import WEBHOOK_SIGNALS, webhook_processing_error
 from django.utils import timezone
 from .models import TransactionLink
 from smoothschedule.scheduling.schedule.models import Event
@@ -13,7 +13,7 @@ import logging
 logger = logging.getLogger(__name__)
 
 
-@receiver(signals.webhook_processing_error)
+@receiver(webhook_processing_error)
 def handle_webhook_error(sender, exception, event_type, **kwargs):
     """
     Log webhook processing errors for debugging.
@@ -31,7 +31,7 @@ def handle_webhook_error(sender, exception, event_type, **kwargs):
     )
 
 
-@receiver(signals.payment_intent_succeeded)
+@receiver(WEBHOOK_SIGNALS['payment_intent.succeeded'])
 def handle_payment_succeeded(sender, event, **kwargs):
     """
     Handle successful payment and update Event status to PAID.
@@ -80,7 +80,7 @@ def handle_payment_succeeded(sender, event, **kwargs):
         )
 
 
-@receiver(signals.payment_intent_payment_failed)
+@receiver(WEBHOOK_SIGNALS['payment_intent.payment_failed'])
 def handle_payment_failed(sender, event, **kwargs):
     """Handle failed payments"""
     payment_intent = event.data.object
@@ -109,7 +109,7 @@ def handle_payment_failed(sender, event, **kwargs):
         logger.error(f"Error processing payment_failed: {str(e)}", exc_info=e)
 
 
-@receiver(signals.payment_intent_canceled)
+@receiver(WEBHOOK_SIGNALS['payment_intent.canceled'])
 def handle_payment_canceled(sender, event, **kwargs):
     """Handle canceled payments"""
     payment_intent = event.data.object

smoothschedule/smoothschedule/identity/core/tests/test_serializers.py

@@ -15,18 +15,23 @@ class TestTimezoneSerializerMixin:
     """Test TimezoneSerializerMixin class."""
 
     def test_adds_business_timezone_field_to_serializer(self):
-        """Should add business_timezone as a SerializerMethodField."""
+        """Should add business_timezone as a SerializerMethodField when in Meta.fields."""
         from smoothschedule.identity.core.mixins import TimezoneSerializerMixin
 
         class TestSerializer(TimezoneSerializerMixin, serializers.Serializer):
             name = serializers.CharField()
 
+            class Meta:
+                fields = ['name', 'business_timezone']
+
         # Need to instantiate with context to bind the serializer
         serializer = TestSerializer(context={})
 
-        # Check that the mixin defines the business_timezone attribute
-        assert hasattr(TimezoneSerializerMixin, 'business_timezone')
-        assert isinstance(TimezoneSerializerMixin.business_timezone, serializers.SerializerMethodField)
+        # Check that the mixin provides the get_business_timezone method
+        assert hasattr(TimezoneSerializerMixin, 'get_business_timezone')
+        # Check that business_timezone field is dynamically added when in Meta.fields
+        assert 'business_timezone' in serializer.fields
+        assert isinstance(serializer.fields['business_timezone'], serializers.SerializerMethodField)
 
     def test_get_business_timezone_from_context_tenant(self):
         """Should get timezone from tenant in context."""
@@ -258,6 +263,9 @@ class TestTimezoneSerializerMixin:
         class TestSerializer(TimezoneSerializerMixin, serializers.Serializer):
             name = serializers.CharField()
 
+            class Meta:
+                fields = ['name', 'business_timezone']
+
         # Attempt to create with business_timezone
         data = {
             'name': 'Test Event',
@@ -270,7 +278,9 @@ class TestTimezoneSerializerMixin:
         assert serializer.is_valid()
 
         # The business_timezone field is a SerializerMethodField which is always read-only
-        assert isinstance(TimezoneSerializerMixin.business_timezone, serializers.SerializerMethodField)
+        assert isinstance(serializer.fields['business_timezone'], serializers.SerializerMethodField)
+        # Validated data should not include business_timezone (it's read-only)
+        assert 'business_timezone' not in serializer.validated_data
 
 
 class TestTimezoneContextMixin:

smoothschedule/smoothschedule/platform/admin/tests/test_views.py

@@ -1361,15 +1361,19 @@ class TestTenantViewSet:
         request.query_params = {'is_active': 'true'}
 
         mock_queryset = Mock()
+        excluded_queryset = Mock()
         filtered_queryset = Mock()
-        mock_queryset.filter.return_value = filtered_queryset
+        # Chain: queryset.exclude().filter()
+        mock_queryset.exclude.return_value = excluded_queryset
+        excluded_queryset.filter.return_value = filtered_queryset
 
         with patch.object(self.viewset, 'queryset', mock_queryset):
             view = self.viewset()
             view.request = request
             result = view.get_queryset()
 
-        mock_queryset.filter.assert_called_once_with(is_active=True)
+        mock_queryset.exclude.assert_called_once_with(schema_name='public')
+        excluded_queryset.filter.assert_called_once_with(is_active=True)
 
     def test_destroy_requires_superuser(self):
         """Test destroy requires superuser role"""
@@ -1424,9 +1428,12 @@ class TestTenantViewSet:
             role=User.Role.SUPERUSER
         )
 
-        with patch('smoothschedule.identity.core.models.Tenant.objects.count', return_value=10):
-            with patch('smoothschedule.identity.core.models.Tenant.objects.filter') as mock_filter:
-                mock_filter.return_value.count.return_value = 8
+        # Mock the Tenant.objects.exclude().count() and .filter().count() chains
+        with patch('smoothschedule.identity.core.models.Tenant.objects.exclude') as mock_exclude:
+            mock_excluded = Mock()
+            mock_exclude.return_value = mock_excluded
+            mock_excluded.count.return_value = 10  # total_tenants
+            mock_excluded.filter.return_value.count.return_value = 8  # active_tenants
             with patch('smoothschedule.identity.users.models.User.objects.count', return_value=100):
                 view = self.viewset.as_view({'get': 'metrics'})
                 response = view(request)
@@ -1435,6 +1442,9 @@ class TestTenantViewSet:
         assert 'total_tenants' in response.data
         assert 'active_tenants' in response.data
         assert 'total_users' in response.data
+        assert response.data['total_tenants'] == 10
+        assert response.data['active_tenants'] == 8
+        assert response.data['total_users'] == 100
 
 
 # ============================================================================