test_protocol.py

# Copyright 2023-2024 SGLang Team
# 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.
# ==============================================================================
"""Tests for OpenAI API protocol models"""

import json
import time
import unittest
from typing import Dict, List, Optional

from pydantic import ValidationError

from sglang.srt.entrypoints.openai.protocol import (
    BatchRequest,
    BatchResponse,
    ChatCompletionMessageContentImagePart,
    ChatCompletionMessageContentTextPart,
    ChatCompletionRequest,
    ChatCompletionResponse,
    ChatCompletionResponseChoice,
    ChatCompletionResponseStreamChoice,
    ChatCompletionStreamResponse,
    ChatCompletionTokenLogprob,
    ChatMessage,
    ChoiceLogprobs,
    CompletionRequest,
    CompletionResponse,
    CompletionResponseChoice,
    DeltaMessage,
    EmbeddingObject,
    EmbeddingRequest,
    EmbeddingResponse,
    ErrorResponse,
    FileDeleteResponse,
    FileRequest,
    FileResponse,
    Function,
    FunctionResponse,
    JsonSchemaResponseFormat,
    LogProbs,
    ModelCard,
    ModelList,
    MultimodalEmbeddingInput,
    ResponseFormat,
    ScoringRequest,
    ScoringResponse,
    StreamOptions,
    StructuralTagResponseFormat,
    Tool,
    ToolCall,
    ToolChoice,
    TopLogprob,
    UsageInfo,
)


class TestModelCard(unittest.TestCase):
    """Test ModelCard protocol model"""

    def test_model_card_serialization(self):
        """Test model card JSON serialization"""
        card = ModelCard(id="test-model", max_model_len=4096)
        data = card.model_dump()
        self.assertEqual(data["id"], "test-model")
        self.assertEqual(data["object"], "model")
        self.assertEqual(data["max_model_len"], 4096)


class TestModelList(unittest.TestCase):
    """Test ModelList protocol model"""

    def test_empty_model_list(self):
        """Test empty model list creation"""
        model_list = ModelList()
        self.assertEqual(model_list.object, "list")
        self.assertEqual(len(model_list.data), 0)

    def test_model_list_with_cards(self):
        """Test model list with model cards"""
        cards = [
            ModelCard(id="model-1"),
            ModelCard(id="model-2", max_model_len=2048),
        ]
        model_list = ModelList(data=cards)
        self.assertEqual(len(model_list.data), 2)
        self.assertEqual(model_list.data[0].id, "model-1")
        self.assertEqual(model_list.data[1].id, "model-2")


class TestCompletionRequest(unittest.TestCase):
    """Test CompletionRequest protocol model"""

    def test_basic_completion_request(self):
        """Test basic completion request"""
        request = CompletionRequest(model="test-model", prompt="Hello world")
        self.assertEqual(request.model, "test-model")
        self.assertEqual(request.prompt, "Hello world")
        self.assertEqual(request.max_tokens, 16)  # default
        self.assertEqual(request.temperature, 1.0)  # default
        self.assertEqual(request.n, 1)  # default
        self.assertFalse(request.stream)  # default
        self.assertFalse(request.echo)  # default

    def test_completion_request_sglang_extensions(self):
        """Test completion request with SGLang-specific extensions"""
        request = CompletionRequest(
            model="test-model",
            prompt="Hello",
            top_k=50,
            min_p=0.1,
            repetition_penalty=1.1,
            regex=r"\d+",
            json_schema='{"type": "object"}',
            lora_path="/path/to/lora",
        )
        self.assertEqual(request.top_k, 50)
        self.assertEqual(request.min_p, 0.1)
        self.assertEqual(request.repetition_penalty, 1.1)
        self.assertEqual(request.regex, r"\d+")
        self.assertEqual(request.json_schema, '{"type": "object"}')
        self.assertEqual(request.lora_path, "/path/to/lora")

    def test_completion_request_validation_errors(self):
        """Test completion request validation errors"""
        with self.assertRaises(ValidationError):
            CompletionRequest()  # missing required fields

        with self.assertRaises(ValidationError):
            CompletionRequest(model="test-model")  # missing prompt


class TestChatCompletionRequest(unittest.TestCase):
    """Test ChatCompletionRequest protocol model"""

    def test_basic_chat_completion_request(self):
        """Test basic chat completion request"""
        messages = [{"role": "user", "content": "Hello"}]
        request = ChatCompletionRequest(model="test-model", messages=messages)
        self.assertEqual(request.model, "test-model")
        self.assertEqual(len(request.messages), 1)
        self.assertEqual(request.messages[0].role, "user")
        self.assertEqual(request.messages[0].content, "Hello")
        self.assertEqual(request.temperature, 0.7)  # default
        self.assertFalse(request.stream)  # default
        self.assertEqual(request.tool_choice, "none")  # default when no tools

    def test_chat_completion_tool_choice_validation(self):
        """Test tool choice validation logic"""
        messages = [{"role": "user", "content": "Hello"}]

        # No tools, tool_choice should default to "none"
        request1 = ChatCompletionRequest(model="test-model", messages=messages)
        self.assertEqual(request1.tool_choice, "none")

        # With tools, tool_choice should default to "auto"
        tools = [
            {
                "type": "function",
                "function": {"name": "test_func", "description": "Test function"},
            }
        ]
        request2 = ChatCompletionRequest(
            model="test-model", messages=messages, tools=tools
        )
        self.assertEqual(request2.tool_choice, "auto")

    def test_chat_completion_sglang_extensions(self):
        """Test chat completion with SGLang extensions"""
        messages = [{"role": "user", "content": "Hello"}]
        request = ChatCompletionRequest(
            model="test-model",
            messages=messages,
            top_k=40,
            min_p=0.05,
            separate_reasoning=False,
            stream_reasoning=False,
            chat_template_kwargs={"custom_param": "value"},
        )
        self.assertEqual(request.top_k, 40)
        self.assertEqual(request.min_p, 0.05)
        self.assertFalse(request.separate_reasoning)
        self.assertFalse(request.stream_reasoning)
        self.assertEqual(request.chat_template_kwargs, {"custom_param": "value"})


class TestModelSerialization(unittest.TestCase):
    """Test model serialization with hidden states"""

    def test_hidden_states_excluded_when_none(self):
        """Test that None hidden_states are excluded with exclude_none=True"""
        choice = ChatCompletionResponseChoice(
            index=0,
            message=ChatMessage(role="assistant", content="Hello"),
            finish_reason="stop",
            hidden_states=None,
        )

        response = ChatCompletionResponse(
            id="test-id",
            model="test-model",
            choices=[choice],
            usage=UsageInfo(prompt_tokens=5, completion_tokens=1, total_tokens=6),
        )

        # Test exclude_none serialization (should exclude None hidden_states)
        data = response.model_dump(exclude_none=True)
        self.assertNotIn("hidden_states", data["choices"][0])

    def test_hidden_states_included_when_not_none(self):
        """Test that non-None hidden_states are included"""
        choice = ChatCompletionResponseChoice(
            index=0,
            message=ChatMessage(role="assistant", content="Hello"),
            finish_reason="stop",
            hidden_states=[0.1, 0.2, 0.3],
        )

        response = ChatCompletionResponse(
            id="test-id",
            model="test-model",
            choices=[choice],
            usage=UsageInfo(prompt_tokens=5, completion_tokens=1, total_tokens=6),
        )

        # Test exclude_none serialization (should include non-None hidden_states)
        data = response.model_dump(exclude_none=True)
        self.assertIn("hidden_states", data["choices"][0])
        self.assertEqual(data["choices"][0]["hidden_states"], [0.1, 0.2, 0.3])


class TestValidationEdgeCases(unittest.TestCase):
    """Test edge cases and validation scenarios"""

    def test_invalid_tool_choice_type(self):
        """Test invalid tool choice type"""
        messages = [{"role": "user", "content": "Hello"}]
        with self.assertRaises(ValidationError):
            ChatCompletionRequest(
                model="test-model", messages=messages, tool_choice=123
            )

    def test_negative_token_limits(self):
        """Test negative token limits"""
        with self.assertRaises(ValidationError):
            CompletionRequest(model="test-model", prompt="Hello", max_tokens=-1)

    def test_model_serialization_roundtrip(self):
        """Test that models can be serialized and deserialized"""
        original_request = ChatCompletionRequest(
            model="test-model",
            messages=[{"role": "user", "content": "Hello"}],
            temperature=0.7,
            max_tokens=100,
        )

        # Serialize to dict
        data = original_request.model_dump()

        # Deserialize back
        restored_request = ChatCompletionRequest(**data)

        self.assertEqual(restored_request.model, original_request.model)
        self.assertEqual(restored_request.temperature, original_request.temperature)
        self.assertEqual(restored_request.max_tokens, original_request.max_tokens)
        self.assertEqual(len(restored_request.messages), len(original_request.messages))


if __name__ == "__main__":
    unittest.main(verbosity=2)