Added tests for feature

tests/api/test_regenerate_api_key.py

@@ -0,0 +1,41 @@
+from django.test import TestCase
+from django.urls import reverse
+from backend.models import User
+from backend.core.api.public import APIAuthToken
+
+
+class RegenerateAPIKeyTestCase(TestCase):
+    def setUp(self):
+        self.user = User.objects.create_user(
+            username="user@example.com",
+            password="user",
+            email="user@example.com",
+            entitlements=["api-access", "api_keys:write"],
+            is_superuser=False,
+        )
+        self.user.save()
+        self.client.login(username="user@example.com", password="user")
+        self.api_key = APIAuthToken.objects.create(
+            user=self.user, name="Test Key", scopes=["api_keys:write"], description="Test Description"
+        )
+        self.url = reverse("api:settings:api_keys regenerate", args=[self.api_key.id])
+
+    def test_regenerate_api_key_success(self):
+        response = self.client.post(self.url)
+        self.assertEqual(response.status_code, 200)
+        self.assertContains(response, "API key regenerated successfully")
+        self.assertTrue(APIAuthToken.objects.filter(name="Test Key").exists())
+
+    def test_regenerate_nonexistent_api_key(self):
+        invalid_url = reverse("api:settings:api_keys regenerate", args=[999999])
+        response = self.client.post(invalid_url)
+        self.assertEqual(response.status_code, 200)
+        self.assertContains(response, "API key not found")
+
+    def test_regenerate_api_key_invalid_method(self):
+        response = self.client.get(self.url)
+        self.assertEqual(response.status_code, 405)
+
+    def tearDown(self):
+        APIAuthToken.objects.all().delete()
+        self.user.delete()