project initialization

backend/tests/integration/test_subscription_management.py

@@ -0,0 +1,390 @@
+"""
+Integration test for subscription management.
+This test MUST fail before implementation.
+"""
+
+import pytest
+from django.test import TestCase
+from django.urls import reverse
+from rest_framework.test import APIClient
+from rest_framework import status
+import json
+from datetime import datetime, timedelta
+
+
+class SubscriptionManagementIntegrationTest(TestCase):
+    def setUp(self):
+        self.client = APIClient()
+
+        # Admin authentication header
+        self.admin_auth = {'HTTP_AUTHORIZATION': 'Bearer super_admin_token'}
+
+        # Tenant admin authentication header
+        self.tenant_admin_auth = {'HTTP_AUTHORIZATION': 'Bearer tenant_admin_token'}
+
+        # Test subscription data
+        self.subscription_data = {
+            'plan': 'GROWTH',
+            'pricing_model': 'SUBSCRIPTION',
+            'billing_cycle': 'MONTHLY',
+            'payment_method': {
+                'type': 'CARD',
+                'card_last4': '4242',
+                'expiry_month': 12,
+                'expiry_year': 2025,
+                'brand': 'visa'
+            },
+            'modules': ['retail', 'inventory'],
+            'trial_days': 14
+        }
+
+    def test_subscription_lifecycle_management(self):
+        """Test complete subscription lifecycle from trial to cancellation."""
+        # Step 1: Create subscription with trial (should fail before implementation)
+        create_response = self.client.post(
+            '/api/v1/subscriptions/',
+            data=json.dumps(self.subscription_data),
+            content_type='application/json',
+            **self.tenant_admin_auth
+        )
+
+        assert create_response.status_code == status.HTTP_201_CREATED
+        subscription_data = create_response.json()
+
+        # Verify subscription structure
+        assert 'id' in subscription_data
+        assert subscription_data['plan'] == self.subscription_data['plan']
+        assert subscription_data['status'] == 'TRIAL'
+        assert subscription_data['billing_cycle'] == self.subscription_data['billing_cycle']
+
+        # Verify billing period
+        assert 'current_period_start' in subscription_data
+        assert 'current_period_end' in subscription_data
+        assert 'trial_end' in subscription_data
+
+        # Step 2: Test subscription upgrades during trial
+        upgrade_data = {
+            'plan': 'PRO',
+            'reason': 'Business growth requires more features'
+        }
+
+        upgrade_response = self.client.post(
+            f'/api/v1/subscriptions/{subscription_data["id"]}/upgrade/',
+            data=json.dumps(upgrade_data),
+            content_type='application/json',
+            **self.tenant_admin_auth
+        )
+
+        assert upgrade_response.status_code == status.HTTP_200_OK
+        upgraded_data = upgrade_response.json()
+
+        assert upgraded_data['plan'] == 'PRO'
+        assert upgraded_data['status'] == 'TRIAL'  # Still in trial period
+
+        # Step 3: Simulate trial end and activation
+        # In real implementation, this would be handled by a background job
+        activate_response = self.client.post(
+            f'/api/v1/subscriptions/{subscription_data["id"]}/activate/',
+            data=json.dumps({}),
+            content_type='application/json',
+            **self.admin_auth
+        )
+
+        assert activate_response.status_code == status.HTTP_200_OK
+        activated_data = activate_response.json()
+
+        assert activated_data['status'] == 'ACTIVE'
+        assert activated_data['plan'] == 'PRO'
+
+        # Step 4: Test subscription usage tracking
+        usage_response = self.client.get(
+            f'/api/v1/subscriptions/{subscription_data["id"]}/usage/',
+            **self.tenant_admin_auth
+        )
+
+        assert usage_response.status_code == status.HTTP_200_OK
+        usage_data = usage_response.json()
+
+        assert 'usage' in usage_data
+        assert 'limits' in usage_data
+        assert 'users_count' in usage_data['usage']
+        assert 'storage_used' in usage_data['usage']
+
+        # Step 5: Test subscription downgrade
+        downgrade_data = {
+            'plan': 'GROWTH',
+            'effective_date': (datetime.now() + timedelta(days=30)).isoformat()
+        }
+
+        downgrade_response = self.client.post(
+            f'/api/v1/subscriptions/{subscription_data["id"]}/downgrade/',
+            data=json.dumps(downgrade_data),
+            content_type='application/json',
+            **self.tenant_admin_auth
+        )
+
+        assert downgrade_response.status_code == status.HTTP_200_OK
+        downgraded_data = downgrade_response.json()
+
+        assert downgraded_data['pending_plan'] == 'GROWTH'
+        assert downgraded_data['plan_change_effective_date'] == downgrade_data['effective_date']
+
+        # Step 6: Test subscription cancellation
+        cancel_data = {
+            'reason': 'Business closure',
+            'feedback': 'Closing down operations',
+            'immediate': False
+        }
+
+        cancel_response = self.client.post(
+            f'/api/v1/subscriptions/{subscription_data["id"]}/cancel/',
+            data=json.dumps(cancel_data),
+            content_type='application/json',
+            **self.tenant_admin_auth
+        )
+
+        assert cancel_response.status_code == status.HTTP_200_OK
+        cancelled_data = cancel_response.json()
+
+        assert cancelled_data['status'] == 'ACTIVE'  # Still active until end of period
+        assert cancelled_data['cancel_at_period_end'] is True
+
+    def test_subscription_billing_and_payments(self):
+        """Test subscription billing and payment processing."""
+        # Create subscription
+        create_response = self.client.post(
+            '/api/v1/subscriptions/',
+            data=json.dumps(self.subscription_data),
+            content_type='application/json',
+            **self.tenant_admin_auth
+        )
+
+        assert create_response.status_code == status.HTTP_201_CREATED
+        subscription_id = create_response.json()['id']
+
+        # Test billing history
+        billing_response = self.client.get(
+            f'/api/v1/subscriptions/{subscription_id}/billing/',
+            **self.tenant_admin_auth
+        )
+
+        assert billing_response.status_code == status.HTTP_200_OK
+        billing_data = billing_response.json()
+
+        assert 'invoices' in billing_data
+        assert 'payments' in billing_data
+        assert 'upcoming_invoice' in billing_data
+
+        # Test payment method management
+        payment_method_data = {
+            'type': 'CARD',
+            'card_number': '4242424242424242',
+            'expiry_month': 12,
+            'expiry_year': 2025,
+            'cvv': '123',
+            'cardholder_name': 'Test User'
+        }
+
+        add_payment_response = self.client.post(
+            f'/api/v1/subscriptions/{subscription_id}/payment-methods/',
+            data=json.dumps(payment_method_data),
+            content_type='application/json',
+            **self.tenant_admin_auth
+        )
+
+        assert add_payment_response.status_code == status.HTTP_201_CREATED
+
+    def test_subscription_plan_changes_validation(self):
+        """Test validation of subscription plan changes."""
+        # Create subscription
+        create_response = self.client.post(
+            '/api/v1/subscriptions/',
+            data=json.dumps(self.subscription_data),
+            content_type='application/json',
+            **self.tenant_admin_auth
+        )
+
+        assert create_response.status_code == status.HTTP_201_CREATED
+        subscription_id = create_response.json()['id']
+
+        # Test invalid plan upgrade
+        invalid_upgrade_data = {
+            'plan': 'INVALID_PLAN'
+        }
+
+        invalid_upgrade_response = self.client.post(
+            f'/api/v1/subscriptions/{subscription_id}/upgrade/',
+            data=json.dumps(invalid_upgrade_data),
+            content_type='application/json',
+            **self.tenant_admin_auth
+        )
+
+        assert invalid_upgrade_response.status_code == status.HTTP_400_BAD_REQUEST
+
+        # Test downgrade to same plan
+        same_plan_data = {
+            'plan': self.subscription_data['plan']
+        }
+
+        same_plan_response = self.client.post(
+            f'/api/v1/subscriptions/{subscription_id}/downgrade/',
+            data=json.dumps(same_plan_data),
+            content_type='application/json',
+            **self.tenant_admin_auth
+        )
+
+        assert same_plan_response.status_code == status.HTTP_400_BAD_REQUEST
+
+    def test_subscription_module_management(self):
+        """Test subscription module add-ons and management."""
+        # Create base subscription
+        base_subscription = self.subscription_data.copy()
+        base_subscription['modules'] = ['retail']
+
+        create_response = self.client.post(
+            '/api/v1/subscriptions/',
+            data=json.dumps(base_subscription),
+            content_type='application/json',
+            **self.tenant_admin_auth
+        )
+
+        assert create_response.status_code == status.HTTP_201_CREATED
+        subscription_id = create_response.json()['id']
+
+        # Add module
+        add_module_data = {
+            'module': 'inventory',
+            'pricing_model': 'PER_MODULE',
+            'billing_cycle': 'MONTHLY'
+        }
+
+        add_module_response = self.client.post(
+            f'/api/v1/subscriptions/{subscription_id}/modules/',
+            data=json.dumps(add_module_data),
+            content_type='application/json',
+            **self.tenant_admin_auth
+        )
+
+        assert add_module_response.status_code == status.HTTP_200_OK
+
+        # Remove module
+        remove_module_response = self.client.delete(
+            f'/api/v1/subscriptions/{subscription_id}/modules/inventory/',
+            **self.tenant_admin_auth
+        )
+
+        assert remove_module_response.status_code == status.HTTP_200_OK
+
+    def test_subscription_usage_limits(self):
+        """Test subscription usage limits and overage handling."""
+        # Create subscription with specific limits
+        limited_subscription = self.subscription_data.copy()
+        limited_subscription['usage_limits'] = {
+            'users': 5,
+            'storage_gb': 10,
+            'api_calls_per_month': 10000
+        }
+
+        create_response = self.client.post(
+            '/api/v1/subscriptions/',
+            data=json.dumps(limited_subscription),
+            content_type='application/json',
+            **self.tenant_admin_auth
+        )
+
+        assert create_response.status_code == status.HTTP_201_CREATED
+        subscription_id = create_response.json()['id']
+
+        # Check usage limits
+        limits_response = self.client.get(
+            f'/api/v1/subscriptions/{subscription_id}/limits/',
+            **self.tenant_admin_auth
+        )
+
+        assert limits_response.status_code == status.HTTP_200_OK
+        limits_data = limits_response.json()
+
+        assert 'limits' in limits_data
+        assert 'current_usage' in limits_data
+        assert 'overage_charges' in limits_data
+
+    def test_subscription_discounts_and_promotions(self):
+        """Test subscription discounts and promotional codes."""
+        # Create subscription with promo code
+        promo_subscription = self.subscription_data.copy()
+        promo_subscription['promo_code'] = 'WELCOME20'
+
+        create_response = self.client.post(
+            '/api/v1/subscriptions/',
+            data=json.dumps(promo_subscription),
+            content_type='application/json',
+            **self.tenant_admin_auth
+        )
+
+        assert create_response.status_code == status.HTTP_201_CREATED
+        subscription_data = create_response.json()
+
+        # Check discount was applied
+        assert 'discount' in subscription_data
+        assert subscription_data['promo_code'] == 'WELCOME20'
+
+    def test_subscription_notifications_and_reminders(self):
+        """Test subscription notifications and renewal reminders."""
+        # Create subscription
+        create_response = self.client.post(
+            '/api/v1/subscriptions/',
+            data=json.dumps(self.subscription_data),
+            content_type='application/json',
+            **self.tenant_admin_auth
+        )
+
+        assert create_response.status_code == status.HTTP_201_CREATED
+        subscription_id = create_response.json()['id']
+
+        # Test notification settings
+        notification_settings = {
+            'email_notifications': True,
+            'renewal_reminders': True,
+            'usage_alerts': True,
+            'billing_notifications': True
+        }
+
+        settings_response = self.client.put(
+            f'/api/v1/subscriptions/{subscription_id}/notifications/',
+            data=json.dumps(notification_settings),
+            content_type='application/json',
+            **self.tenant_admin_auth
+        )
+
+        assert settings_response.status_code == status.HTTP_200_OK
+
+    def test_subscription_audit_trail(self):
+        """Test subscription changes audit trail."""
+        # Create subscription
+        create_response = self.client.post(
+            '/api/v1/subscriptions/',
+            data=json.dumps(self.subscription_data),
+            content_type='application/json',
+            **self.tenant_admin_auth
+        )
+
+        assert create_response.status_code == status.HTTP_201_CREATED
+        subscription_id = create_response.json()['id']
+
+        # Get audit trail
+        audit_response = self.client.get(
+            f'/api/v1/subscriptions/{subscription_id}/audit/',
+            **self.admin_auth
+        )
+
+        assert audit_response.status_code == status.HTTP_200_OK
+        audit_data = audit_response.json()
+
+        assert 'changes' in audit_data
+        assert isinstance(audit_data['changes'], list)
+        assert len(audit_data['changes']) > 0
+
+        # First change should be subscription creation
+        first_change = audit_data['changes'][0]
+        assert first_change['action'] == 'CREATE'
+        assert first_change['user_id'] is not None