Add comprehensive tests for Parks API and models

- Implemented extensive test cases for the Parks API, covering endpoints for listing, retrieving, creating, updating, and deleting parks.
- Added tests for filtering, searching, and ordering parks in the API.
- Created tests for error handling in the API, including malformed JSON and unsupported methods.
- Developed model tests for Park, ParkArea, Company, and ParkReview models, ensuring validation and constraints are enforced.
- Introduced utility mixins for API and model testing to streamline assertions and enhance test readability.
- Included integration tests to validate complete workflows involving park creation, retrieval, updating, and deletion.

location/migrations/0002_add_business_constraints.py

@@ -0,0 +1,50 @@
+# Generated by Django 5.2.5 on 2025-08-16 17:42
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("contenttypes", "0002_remove_content_type_name"),
+        ("location", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.AddConstraint(
+            model_name="location",
+            constraint=models.CheckConstraint(
+                condition=models.Q(
+                    ("latitude__isnull", True),
+                    models.Q(("latitude__gte", -90), ("latitude__lte", 90)),
+                    _connector="OR",
+                ),
+                name="location_latitude_range",
+                violation_error_message="Latitude must be between -90 and 90 degrees",
+            ),
+        ),
+        migrations.AddConstraint(
+            model_name="location",
+            constraint=models.CheckConstraint(
+                condition=models.Q(
+                    ("longitude__isnull", True),
+                    models.Q(("longitude__gte", -180), ("longitude__lte", 180)),
+                    _connector="OR",
+                ),
+                name="location_longitude_range",
+                violation_error_message="Longitude must be between -180 and 180 degrees",
+            ),
+        ),
+        migrations.AddConstraint(
+            model_name="location",
+            constraint=models.CheckConstraint(
+                condition=models.Q(
+                    models.Q(("latitude__isnull", True), ("longitude__isnull", True)),
+                    models.Q(("latitude__isnull", False), ("longitude__isnull", False)),
+                    _connector="OR",
+                ),
+                name="location_coordinates_complete",
+                violation_error_message="Both latitude and longitude must be provided together",
+            ),
+        ),
+    ]