Sync from v0.13

tests/tool_use/test_chat_completion_request_validations.py

@@ -0,0 +1,63 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+
+import pytest
+
+from vllm.entrypoints.openai.protocol import ChatCompletionRequest
+
+
+def test_chat_completion_request_with_no_tools():
+    # tools key is not present
+    request = ChatCompletionRequest.model_validate(
+        {
+            "messages": [{"role": "user", "content": "Hello"}],
+            "model": "facebook/opt-125m",
+        }
+    )
+    assert request.tool_choice == "none"
+
+    # tools key is None
+    request = ChatCompletionRequest.model_validate(
+        {
+            "messages": [{"role": "user", "content": "Hello"}],
+            "model": "facebook/opt-125m",
+            "tools": None,
+        }
+    )
+    assert request.tool_choice == "none"
+
+    # tools key present but empty
+    request = ChatCompletionRequest.model_validate(
+        {
+            "messages": [{"role": "user", "content": "Hello"}],
+            "model": "facebook/opt-125m",
+            "tools": [],
+        }
+    )
+    assert request.tool_choice == "none"
+
+
+@pytest.mark.parametrize("tool_choice", ["auto", "required"])
+def test_chat_completion_request_with_tool_choice_but_no_tools(tool_choice):
+    with pytest.raises(
+        ValueError, match="When using `tool_choice`, `tools` must be set."
+    ):
+        ChatCompletionRequest.model_validate(
+            {
+                "messages": [{"role": "user", "content": "Hello"}],
+                "model": "facebook/opt-125m",
+                "tool_choice": tool_choice,
+            }
+        )
+
+    with pytest.raises(
+        ValueError, match="When using `tool_choice`, `tools` must be set."
+    ):
+        ChatCompletionRequest.model_validate(
+            {
+                "messages": [{"role": "user", "content": "Hello"}],
+                "model": "facebook/opt-125m",
+                "tool_choice": tool_choice,
+                "tools": None,
+            }
+        )