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sglang/test/registered/unit/function_call/test_mistral_detector.py
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"""Unit tests for MistralDetector — no server, no model loading."""
import json
from sglang.srt.entrypoints.openai.protocol import Function, Tool
from sglang.srt.function_call.mistral_detector import MistralDetector
from sglang.test.ci.ci_register import register_cpu_ci
from sglang.test.test_utils import CustomTestCase
register_cpu_ci(1.0, "base-a-test-cpu")
class TestMistralDetector(CustomTestCase):
def setUp(self):
self.tools = [
Tool(
type="function",
function=Function(
name="get_weather",
description="Get weather information",
parameters={
"type": "object",
"properties": {
"city": {"type": "string", "description": "City name"},
"unit": {
"type": "string",
"enum": ["celsius", "fahrenheit"],
},
},
"required": ["city"],
},
),
),
Tool(
type="function",
function=Function(
name="search",
description="Search the web",
parameters={
"type": "object",
"properties": {
"query": {
"type": "string",
"description": "Search query",
},
},
"required": ["query"],
},
),
),
]
self.detector = MistralDetector()
# ==================== has_tool_call Tests ====================
def test_has_tool_call_json_array_format(self):
text = (
'[TOOL_CALLS] [{"name": "get_weather", "arguments": {"city": "Beijing"}}]'
)
self.assertTrue(self.detector.has_tool_call(text))
def test_has_tool_call_compact_format(self):
text = '[TOOL_CALLS]get_weather[ARGS]{"city": "Beijing"}'
self.assertTrue(self.detector.has_tool_call(text))
def test_has_tool_call_false(self):
text = "The weather in Beijing is sunny today."
self.assertFalse(self.detector.has_tool_call(text))
# ==================== JSON Array Format Tests ====================
def test_json_array_single_tool_call(self):
text = (
'[TOOL_CALLS] [{"name": "get_weather", "arguments": {"city": "Beijing"}}]'
)
result = self.detector.detect_and_parse(text, self.tools)
self.assertEqual(len(result.calls), 1)
self.assertEqual(result.calls[0].name, "get_weather")
args = json.loads(result.calls[0].parameters)
self.assertEqual(args["city"], "Beijing")
self.assertEqual(result.normal_text, "")
def test_json_array_multiple_tool_calls(self):
text = '[TOOL_CALLS] [{"name": "get_weather", "arguments": {"city": "Beijing"}}, {"name": "search", "arguments": {"query": "restaurants"}}]'
result = self.detector.detect_and_parse(text, self.tools)
self.assertEqual(len(result.calls), 2)
self.assertEqual(result.calls[0].name, "get_weather")
self.assertEqual(result.calls[1].name, "search")
def test_json_array_with_leading_text(self):
text = 'I will check. [TOOL_CALLS] [{"name": "get_weather", "arguments": {"city": "Tokyo"}}]'
result = self.detector.detect_and_parse(text, self.tools)
self.assertEqual(len(result.calls), 1)
self.assertEqual(result.normal_text, "I will check.")
# ==================== Compact Format Tests ====================
def test_compact_format_single_tool_call(self):
text = '[TOOL_CALLS]get_weather[ARGS]{"city": "Beijing"}'
result = self.detector.detect_and_parse(text, self.tools)
self.assertEqual(len(result.calls), 1)
self.assertEqual(result.calls[0].name, "get_weather")
args = json.loads(result.calls[0].parameters)
self.assertEqual(args["city"], "Beijing")
def test_compact_format_with_leading_text(self):
text = 'Let me help. [TOOL_CALLS]get_weather[ARGS]{"city": "Tokyo"}'
result = self.detector.detect_and_parse(text, self.tools)
self.assertEqual(len(result.calls), 1)
self.assertEqual(result.normal_text, "Let me help.")
# ==================== No Tool Call Tests ====================
def test_no_tool_call(self):
text = "The weather is nice today."
result = self.detector.detect_and_parse(text, self.tools)
self.assertEqual(len(result.calls), 0)
self.assertEqual(result.normal_text, "The weather is nice today.")
# ==================== Edge Cases ====================
def test_tool_call_with_nested_json(self):
text = '[TOOL_CALLS] [{"name": "get_weather", "arguments": {"city": "Beijing", "options": {"detailed": true}}}]'
result = self.detector.detect_and_parse(text, self.tools)
self.assertEqual(len(result.calls), 1)
args = json.loads(result.calls[0].parameters)
self.assertEqual(args["options"]["detailed"], True)
def test_json_array_with_invalid_json(self):
text = "[TOOL_CALLS] [not valid json]"
result = self.detector.detect_and_parse(text, self.tools)
self.assertEqual(len(result.calls), 0)
self.assertEqual(result.normal_text, "")
# ==================== Internal Methods Tests ====================
def test_extract_json_array(self):
text = (
'[TOOL_CALLS] [{"name": "get_weather", "arguments": {"city": "Beijing"}}]'
)
result = self.detector._extract_json_array(text)
self.assertIsNotNone(result)
parsed = json.loads(result)
self.assertEqual(len(parsed), 1)
self.assertEqual(parsed[0]["name"], "get_weather")
def test_extract_json_array_nested_brackets(self):
text = (
'[TOOL_CALLS] [{"name": "get_weather", "arguments": {"tags": ["a", "b"]}}]'
)
result = self.detector._extract_json_array(text)
self.assertIsNotNone(result)
parsed = json.loads(result)
self.assertEqual(parsed[0]["arguments"]["tags"], ["a", "b"])
def test_extract_json_array_no_marker(self):
text = "no tool calls here"
result = self.detector._extract_json_array(text)
self.assertIsNone(result)
# ==================== structure_info Tests ====================
def test_structure_info(self):
info_func = self.detector.structure_info()
info = info_func("get_weather")
self.assertIn("get_weather", info.begin)
self.assertIn("[TOOL_CALLS]", info.trigger)
self.assertEqual(info.end, "}]")
# ==================== Streaming Tests ====================
def test_streaming_compact_format(self):
detector = MistralDetector()
chunks = [
"[TOOL_",
"CALLS]get_weather",
'[ARGS]{"city": "Beijing"}',
]
all_calls = []
for chunk in chunks:
result = detector.parse_streaming_increment(chunk, self.tools)
all_calls.extend(result.calls)
func_calls = [c for c in all_calls if c.name]
self.assertEqual(len(func_calls), 1)
self.assertEqual(func_calls[0].name, "get_weather")
full_params = "".join(c.parameters for c in all_calls if c.parameters)
params = json.loads(full_params)
self.assertEqual(params["city"], "Beijing")
def test_streaming_normal_text_before_tool(self):
detector = MistralDetector()
result = detector.parse_streaming_increment("Let me check. ", self.tools)
self.assertEqual(result.normal_text, "Let me check. ")
self.assertEqual(len(result.calls), 0)
def test_streaming_text_then_tool_call(self):
detector = MistralDetector()
chunks = [
"Sure! ",
"[TOOL_CALLS]get_weather",
'[ARGS]{"city": "Tokyo"}',
]
all_calls = []
all_normal_text = ""
for chunk in chunks:
result = detector.parse_streaming_increment(chunk, self.tools)
all_calls.extend(result.calls)
all_normal_text += result.normal_text
self.assertEqual(all_normal_text, "Sure! ")
func_calls = [c for c in all_calls if c.name]
self.assertEqual(len(func_calls), 1)
self.assertEqual(func_calls[0].name, "get_weather")
full_params = "".join(c.parameters for c in all_calls if c.parameters)
params = json.loads(full_params)
self.assertEqual(params["city"], "Tokyo")
if __name__ == "__main__":
import unittest
unittest.main()