[CI/Build] LoRA : make add_lora_test safer (#15181)

Signed-off-by: Varun Sundar Rabindranath <varun@neuralmagic.com>
Co-authored-by: Varun Sundar Rabindranath <varun@neuralmagic.com>

tests/lora/test_add_lora.py

 # SPDX-License-Identifier: Apache-2.0
 import asyncio
 import time
-from pathlib import Path
 
 import pytest
-from huggingface_hub import snapshot_download
 
 import vllm.envs as env
 from vllm.engine.arg_utils import AsyncEngineArgs
@@ -13,35 +11,9 @@ from vllm.lora.request import LoRARequest
 from vllm.sampling_params import SamplingParams
 from vllm.utils import merge_async_iterators
 
-MODEL_PATH = "meta-llama/Llama-2-7b-hf"
-LORA_MODULE_DOWNLOAD_PATH = None  # Populated by download_and_prepare_lora_module() #noqa
-LORA_RANK = 8
-DEFAULT_MAX_LORAS = 16 * 3
-
-
-def download_and_prepare_lora_module():
-    """
-    Request submission is expensive when the LoRA adapters have their own
-    tokenizers. This is because, for each request with a new LoRA adapter ID,
-    the front-end loads the tokenizer from disk.
-
-    In this test, as we are comparing request processing times, we want to
-    minimize any extra activity. To this effect, we download the LoRA
-    adapter and remove all the tokenizer files, so the engine will default
-    to the base model tokenizer.
-    """
-    global LORA_MODULE_DOWNLOAD_PATH
-
-    LORA_MODULE_HF_PATH = "yard1/llama-2-7b-sql-lora-test"
-    LORA_MODULE_DOWNLOAD_PATH = snapshot_download(repo_id=LORA_MODULE_HF_PATH)
-
-    tokenizer_files = [
-        'added_tokens.json', 'tokenizer_config.json', 'tokenizer.json',
-        'tokenizer.model'
-    ]
-    for tokenizer_file in tokenizer_files:
-        del_path = Path(LORA_MODULE_DOWNLOAD_PATH) / tokenizer_file
-        del_path.unlink(missing_ok=True)
+MODEL_PATH = "THUDM/chatglm3-6b"
+LORA_RANK = 64
+DEFAULT_MAX_LORAS = 4 * 3
 
 
 @pytest.fixture(autouse=True)
@@ -52,11 +24,9 @@ def v1(run_with_both_engines_lora):
     pass
 
 
-def get_lora_requests() -> list[LoRARequest]:
+def get_lora_requests(lora_path) -> list[LoRARequest]:
     lora_requests: list[LoRARequest] = [
-        LoRARequest(lora_name=f"{i}",
-                    lora_int_id=i,
-                    lora_path=LORA_MODULE_DOWNLOAD_PATH)
+        LoRARequest(lora_name=f"{i}", lora_int_id=i, lora_path=lora_path)
         for i in range(1, DEFAULT_MAX_LORAS + 1)
     ]
     return lora_requests
@@ -93,7 +63,7 @@ async def requests_processing_time(llm,
 
 
 @pytest.mark.asyncio
-async def test_add_lora():
+async def test_add_lora(chatglm3_lora_files):
     """ 
     The add_lora function is used to pre-load some LoRA adapters into the
     engine in anticipation of future requests using these adapters. To test
@@ -103,10 +73,7 @@ async def test_add_lora():
     We measure the request processing time in both cases and expect the time 
     to be lesser in the case with add_lora() calls.
     """
-
-    download_and_prepare_lora_module()
-
-    lora_requests: list[LoRARequest] = get_lora_requests()
+    lora_requests: list[LoRARequest] = get_lora_requests(chatglm3_lora_files)
 
     max_loras = len(set([lr.lora_int_id for lr in lora_requests]))
     # Create engine in eager-mode. Due to high max_loras, the CI can
@@ -118,6 +85,7 @@ async def test_add_lora():
         max_lora_rank=LORA_RANK,
         max_model_len=128,
         gpu_memory_utilization=0.8,  #avoid OOM
+        trust_remote_code=True,
         enforce_eager=True)
 
     # The run_with_both_engines_lora fixture sets up the `VLLM_USE_V1`