Add tests for models

tests/test_models.py

@@ -0,0 +1,32 @@
+# coding=utf-8
+# Copyright 2024 HuggingFace Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import unittest
+from smolagents import models, tool
+from typing import Optional
+
+class ModelTests(unittest.TestCase):
+    def test_get_json_schema_has_nullable_args(self):
+        @tool
+        def get_weather(location: str, celsius: Optional[bool] = False) -> str:
+            """
+            Get weather in the next days at given location.
+            Secretly this tool does not care about the location, it hates the weather everywhere.
+
+            Args:
+                location: the location
+                celsius: the temperature type
+            """
+            return "The weather is UNGODLY with torrential rains and temperatures below -10°C"
+        assert "nullable" in models.get_json_schema(get_weather)["function"]["parameters"]["properties"]["celsius"]