Improve tests

etc/unittest/backend.py

@@ -0,0 +1,38 @@
+from . import include
+import unittest
+from unittest.mock import MagicMock
+from .mocks import ProviderMock
+import g4f
+from g4f.gui.server.backend import Backend_Api, get_error_message
+        
+class TestBackendApi(unittest.TestCase):
+
+    def setUp(self):
+        self.app = MagicMock()
+        self.api = Backend_Api(self.app)
+
+    def test_version(self):
+        response = self.api.get_version()
+        self.assertIn("version", response)
+        self.assertIn("latest_version", response)
+        
+    def test_get_models(self):
+        response = self.api.get_models()
+        self.assertIsInstance(response, list)
+        self.assertTrue(len(response) > 0)
+        
+    def test_get_providers(self):
+        response = self.api.get_providers()
+        self.assertIsInstance(response, list)
+        self.assertTrue(len(response) > 0)
+        
+class TestUtilityFunctions(unittest.TestCase):
+
+    def test_get_error_message(self):
+        g4f.debug.last_provider = ProviderMock
+        exception = Exception("Message")
+        result = get_error_message(exception)
+        self.assertEqual("ProviderMock: Exception: Message", result)
+        
+if __name__ == '__main__':
+    unittest.main()