Improve tests

etc/unittest/mocks.py

@@ -0,0 +1,25 @@
+from g4f.Provider.base_provider import AbstractProvider, AsyncProvider, AsyncGeneratorProvider
+
+class ProviderMock(AbstractProvider):
+    working = True
+
+    def create_completion(
+        model, messages, stream, **kwargs
+    ):
+        yield "Mock"
+        
+class AsyncProviderMock(AsyncProvider):
+    working = True
+    
+    async def create_async(
+        model, messages, **kwargs
+    ):
+        return "Mock"
+
+class AsyncGeneratorProviderMock(AsyncGeneratorProvider):
+    working = True
+    
+    async def create_async_generator(
+        model, messages, stream, **kwargs
+    ):
+        yield "Mock"