99 lines
3.4 KiB
Python
99 lines
3.4 KiB
Python
import re
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import openai
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from sglang.srt.hf_transformers_utils import get_tokenizer
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from sglang.srt.utils import kill_process_tree
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from sglang.test.test_utils import (
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DEFAULT_SMALL_MODEL_NAME_FOR_TEST,
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DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
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DEFAULT_URL_FOR_TEST,
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CustomTestCase,
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popen_launch_server,
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)
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# -------------------------------------------------------------------------
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# EBNF Test Class: TestOpenAIServerEBNF
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# Launches the server with xgrammar, has only EBNF tests
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# -------------------------------------------------------------------------
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class TestOpenAIServerEBNF(CustomTestCase):
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@classmethod
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def setUpClass(cls):
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cls.model = DEFAULT_SMALL_MODEL_NAME_FOR_TEST
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cls.base_url = DEFAULT_URL_FOR_TEST
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cls.api_key = "sk-123456"
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# passing xgrammar specifically
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other_args = ["--grammar-backend", "xgrammar"]
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cls.process = popen_launch_server(
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cls.model,
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cls.base_url,
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timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
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api_key=cls.api_key,
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other_args=other_args,
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)
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cls.base_url += "/v1"
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cls.tokenizer = get_tokenizer(DEFAULT_SMALL_MODEL_NAME_FOR_TEST)
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@classmethod
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def tearDownClass(cls):
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kill_process_tree(cls.process.pid)
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def test_ebnf(self):
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"""
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Ensure we can pass `ebnf` to the local openai server
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and that it enforces the grammar.
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"""
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client = openai.Client(api_key=self.api_key, base_url=self.base_url)
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ebnf_grammar = r"""
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root ::= "Hello" | "Hi" | "Hey"
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"""
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pattern = re.compile(r"^(Hello|Hi|Hey)[.!?]*\s*$")
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response = client.chat.completions.create(
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model=self.model,
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messages=[
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{"role": "system", "content": "You are a helpful EBNF test bot."},
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{"role": "user", "content": "Say a greeting (Hello, Hi, or Hey)."},
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],
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temperature=0,
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max_tokens=32,
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extra_body={"ebnf": ebnf_grammar},
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)
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text = response.choices[0].message.content.strip()
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self.assertTrue(len(text) > 0, "Got empty text from EBNF generation")
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self.assertRegex(text, pattern, f"Text '{text}' doesn't match EBNF choices")
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def test_ebnf_strict_json(self):
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"""
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A stricter EBNF that produces exactly {"name":"Alice"} format
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with no trailing punctuation or extra fields.
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"""
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client = openai.Client(api_key=self.api_key, base_url=self.base_url)
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ebnf_grammar = r"""
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root ::= "{" pair "}"
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pair ::= "\"name\"" ":" string
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string ::= "\"" [A-Za-z]+ "\""
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"""
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pattern = re.compile(r'^\{"name":"[A-Za-z]+"\}$')
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response = client.chat.completions.create(
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model=self.model,
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messages=[
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{"role": "system", "content": "EBNF mini-JSON generator."},
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{
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"role": "user",
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"content": "Generate single key JSON with only letters.",
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},
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],
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temperature=0,
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max_tokens=64,
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extra_body={"ebnf": ebnf_grammar},
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)
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text = response.choices[0].message.content.strip()
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self.assertTrue(len(text) > 0, "Got empty text from EBNF strict JSON test")
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self.assertRegex(
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text, pattern, f"Text '{text}' not matching the EBNF strict JSON shape"
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)
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