"""Unit tests for the Omni serve CLI helpers.""" from __future__ import annotations import argparse from types import SimpleNamespace from typing import Any import pytest from pytest_mock import MockerFixture from vllm_omni.entrypoints.cli.serve import OmniServeCommand, run_headless pytestmark = [pytest.mark.core_model, pytest.mark.cpu] def test_serve_parser_accepts_no_async_chunk() -> None: """``--no-async-chunk`` should parse after deploy-overriding parser defaults are nullified.""" try: from vllm.utils.argparse_utils import FlexibleArgumentParser except Exception as exc: pytest.skip(f"Cannot build parser in this environment: {exc}") root = FlexibleArgumentParser() subparsers = root.add_subparsers(dest="subcommand") cmd = OmniServeCommand() cmd.subparser_init(subparsers) argv = ["serve", "fake-model", "--omni", "--no-async-chunk"] args = root.parse_args(argv) assert args.async_chunk is False # --------------------------------------------------------------------------- # run_headless validation # --------------------------------------------------------------------------- def _make_headless_args(**overrides: Any) -> argparse.Namespace: """Build an argparse.Namespace shaped like the headless CLI passes in. Defaults pass every validation gate so individual tests can mutate just the field they're exercising. """ defaults = dict( model="fake-model", stage_id=0, replica_id=0, omni_master_address="127.0.0.1", omni_master_port=26000, omni_replica_address=None, omni_dp_size_local=1, api_server_count=0, worker_backend="multi_process", stage_configs_path=None, deploy_config=None, log_stats=False, disable_log_stats=False, stage_init_timeout=600, tokenizer=None, ) defaults.update(overrides) return argparse.Namespace(**defaults) def test_run_headless_requires_stage_id() -> None: args = _make_headless_args(stage_id=None) with pytest.raises(ValueError, match="--stage-id is required"): run_headless(args) def test_run_headless_requires_master_address() -> None: args = _make_headless_args(omni_master_address=None) with pytest.raises(ValueError, match="--omni-master-address and --omni-master-port"): run_headless(args) def test_run_headless_requires_master_port() -> None: args = _make_headless_args(omni_master_port=None) with pytest.raises(ValueError, match="--omni-master-address and --omni-master-port"): run_headless(args) def test_run_headless_rejects_multi_api_server_count() -> None: args = _make_headless_args(api_server_count=2) with pytest.raises(ValueError, match="api_server_count can't be set"): run_headless(args) def test_run_headless_rejects_non_multiprocess_worker_backend() -> None: args = _make_headless_args(worker_backend="ray") with pytest.raises(ValueError, match="worker_backend=multi_process"): run_headless(args) def test_run_headless_raises_when_stage_id_not_in_configs(mocker: MockerFixture) -> None: """Headless looks up its assigned stage_id in the loaded deploy YAML and fails fast when the launcher's --stage-id doesn't match any entry.""" other_stage = SimpleNamespace(stage_id=99) mocker.patch( "vllm_omni.entrypoints.utils.load_and_resolve_stage_configs", return_value=("/fake/stages.yaml", [other_stage]), ) args = _make_headless_args(stage_id=0) with pytest.raises(ValueError, match="No stage config found for stage_id=0"): run_headless(args) # --------------------------------------------------------------------------- # run_headless happy paths # --------------------------------------------------------------------------- def _make_stage_cfg(stage_id: int, stage_type: str) -> SimpleNamespace: """Build a stage config that satisfies every attribute run_headless reads. Notably ``engine_args`` is a real dict (not a Mock) so ``get_stage_devices_per_replica`` can call ``.get("tensor_parallel_size")`` and feed the result through ``int()`` without TypeError. """ return SimpleNamespace( stage_id=stage_id, stage_type=stage_type, # No "devices" key -> split_devices_for_replicas skipped, each replica # inherits the launcher's CUDA_VISIBLE_DEVICES. runtime=None, engine_args={}, ) def test_run_headless_llm_registers_with_auto_assigned_replica_id(mocker: MockerFixture) -> None: """LLM headless: each loop iteration registers with auto-assigned replica_id (master picks a free slot) and spawns one ``OmniCoreEngineProcManager`` per local replica.""" from vllm_omni.engine.stage_engine_startup import StageRegistrationResponse stage_cfg = _make_stage_cfg(0, stage_type="llm") parallel_config = SimpleNamespace( data_parallel_size_local=1, data_parallel_rank=0, data_parallel_rank_local=0, node_rank_within_dp=0, ) vllm_config = SimpleNamespace(parallel_config=parallel_config, needs_dp_coordinator=False) engine_manager = mocker.Mock() mocker.patch( "vllm_omni.entrypoints.utils.load_and_resolve_stage_configs", return_value=("/fake/stages.yaml", [stage_cfg]), ) mocker.patch("vllm_omni.engine.stage_init_utils.prepare_engine_environment") mocker.patch("vllm_omni.engine.stage_init_utils.load_omni_transfer_config_for_model", return_value=None) mocker.patch( "vllm_omni.distributed.omni_connectors.utils.initialization.resolve_omni_kv_config_for_stage", return_value=(None, None, None), ) mocker.patch("vllm_omni.engine.stage_init_utils.get_stage_connector_spec", return_value={}) mocker.patch("vllm_omni.engine.stage_init_utils.build_engine_args_dict", return_value={}) mocker.patch( "vllm_omni.engine.stage_init_utils.build_vllm_config", return_value=(vllm_config, object), ) mock_register = mocker.patch( "vllm_omni.engine.stage_engine_startup.register_stage_with_omni_master", return_value=StageRegistrationResponse( handshake_address="tcp://127.0.0.1:26001", input_address="tcp://127.0.0.1:26002", output_address="tcp://127.0.0.1:26003", replica_id=0, coordinator_router_address="tcp://127.0.0.1:26100", ), ) mock_manager_cls = mocker.patch( "vllm_omni.engine.omni_core_engine_proc_manager.OmniCoreEngineProcManager", return_value=engine_manager, ) mocker.patch("signal.signal") run_headless(_make_headless_args(stage_id=0)) # The launcher must request auto-assignment (replica_id=None) and the # full response so it can wire the master-allocated coordinator into the # spawned subprocess. ``replica_binds_sockets=False`` is required for LLM # because the head binds all three sockets (handshake, input, output). assert mock_register.call_count == 1 kwargs = mock_register.call_args.kwargs assert kwargs["omni_master_address"] == "127.0.0.1" assert kwargs["omni_master_port"] == 26000 assert kwargs["omni_stage_id"] == 0 assert kwargs["omni_stage_config"] is stage_cfg assert kwargs["replica_id"] is None assert kwargs["return_full_response"] is True assert kwargs["replica_binds_sockets"] is False assert mock_manager_cls.call_count == 1 mgr_kwargs = mock_manager_cls.call_args.kwargs assert mgr_kwargs["local_engine_count"] == 1 assert mgr_kwargs["local_client"] is False assert mgr_kwargs["handshake_address"] == "tcp://127.0.0.1:26001" assert mgr_kwargs["omni_stage_id"] == 0 assert mgr_kwargs["omni_coordinator_address"] == "tcp://127.0.0.1:26100" assert mgr_kwargs["omni_replica_base_id"] == 0 engine_manager.monitor_engine_liveness.assert_called_once_with() engine_manager.shutdown.assert_called_once_with() def test_run_headless_llm_launches_one_manager_per_omni_dp_size_local(mocker: MockerFixture) -> None: """``--omni-dp-size-local=N`` must spawn N managers, each with its own master-assigned replica_id, and join all of them before returning.""" from vllm_omni.engine.stage_engine_startup import StageRegistrationResponse stage_cfg = _make_stage_cfg(0, stage_type="llm") parallel_config = SimpleNamespace( data_parallel_size_local=1, data_parallel_rank=0, data_parallel_rank_local=0, node_rank_within_dp=0, ) vllm_config = SimpleNamespace(parallel_config=parallel_config, needs_dp_coordinator=False) manager_a = mocker.Mock() manager_b = mocker.Mock() mocker.patch( "vllm_omni.entrypoints.utils.load_and_resolve_stage_configs", return_value=("/fake/stages.yaml", [stage_cfg]), ) mocker.patch("vllm_omni.engine.stage_init_utils.prepare_engine_environment") mocker.patch("vllm_omni.engine.stage_init_utils.load_omni_transfer_config_for_model", return_value=None) mocker.patch( "vllm_omni.distributed.omni_connectors.utils.initialization.resolve_omni_kv_config_for_stage", return_value=(None, None, None), ) mocker.patch("vllm_omni.engine.stage_init_utils.get_stage_connector_spec", return_value={}) mocker.patch("vllm_omni.engine.stage_init_utils.build_engine_args_dict", return_value={}) mocker.patch( "vllm_omni.engine.stage_init_utils.build_vllm_config", return_value=(vllm_config, object), ) mocker.patch( "vllm_omni.engine.stage_engine_startup.register_stage_with_omni_master", side_effect=[ StageRegistrationResponse( handshake_address=f"tcp://127.0.0.1:2700{idx}", input_address=f"tcp://127.0.0.1:2710{idx}", output_address=f"tcp://127.0.0.1:2720{idx}", replica_id=idx, coordinator_router_address=None, ) for idx in (0, 1) ], ) mock_manager_cls = mocker.patch( "vllm_omni.engine.omni_core_engine_proc_manager.OmniCoreEngineProcManager", side_effect=[manager_a, manager_b], ) mocker.patch("signal.signal") run_headless(_make_headless_args(stage_id=0, omni_dp_size_local=2)) assert mock_manager_cls.call_count == 2 assigned_ids = [call.kwargs["omni_replica_base_id"] for call in mock_manager_cls.call_args_list] assert assigned_ids == [0, 1] # Multi-replica path joins the monitor threads instead of calling # ``monitor_engine_liveness`` synchronously on the main thread, but every # manager must still be shut down in the finally block. manager_a.shutdown.assert_called_once_with() manager_b.shutdown.assert_called_once_with() def test_run_headless_diffusion_registers_and_spawns_proc(mocker: MockerFixture) -> None: """Diffusion headless: registers as auto-assign, spawns a single ``StageDiffusionProc`` per local replica, and waits for it via ``multiprocessing.connection.wait``.""" from vllm_omni.engine.stage_engine_startup import StageRegistrationResponse stage_cfg = _make_stage_cfg(1, stage_type="diffusion") od_config = mocker.Mock() proc = mocker.Mock(sentinel=object(), exitcode=0) proc.is_alive.return_value = False mocker.patch( "vllm_omni.entrypoints.utils.load_and_resolve_stage_configs", return_value=("/fake/stages.yaml", [stage_cfg]), ) mocker.patch("vllm_omni.engine.stage_init_utils.prepare_engine_environment") mocker.patch("vllm_omni.engine.stage_init_utils.load_omni_transfer_config_for_model", return_value=None) mocker.patch( "vllm_omni.distributed.omni_connectors.utils.initialization.resolve_omni_kv_config_for_stage", return_value=(None, None, None), ) mocker.patch( "vllm_omni.engine.stage_init_utils.extract_stage_metadata", return_value=SimpleNamespace(stage_id=1, stage_type="diffusion"), ) mock_inject = mocker.patch("vllm_omni.engine.stage_init_utils.inject_kv_stage_info") mocker.patch("vllm_omni.engine.stage_init_utils.build_diffusion_config", return_value=od_config) mock_register = mocker.patch( "vllm_omni.engine.stage_engine_startup.register_stage_with_omni_master", return_value=StageRegistrationResponse( handshake_address="tcp://127.0.0.1:26001", input_address="tcp://127.0.0.1:26002", output_address="tcp://127.0.0.1:26003", replica_id=0, coordinator_router_address="tcp://127.0.0.1:26100", ), ) mock_spawn = mocker.patch( "vllm_omni.diffusion.stage_diffusion_proc.spawn_diffusion_proc", return_value=(proc, None, None, None), ) mock_handshake = mocker.patch("vllm_omni.diffusion.stage_diffusion_proc.complete_diffusion_handshake") # Replace the blocking wait with one that returns the only proc's sentinel # immediately so the test does not hang. mocker.patch( "multiprocessing.connection.wait", side_effect=lambda sentinels: [sentinels[0]], ) mocker.patch("vllm_omni.engine.stage_init_utils.terminate_alive_proc") mocker.patch("signal.signal") run_headless(_make_headless_args(stage_id=1)) mock_inject.assert_called_once() assert mock_inject.call_args.args[0] is stage_cfg assert mock_inject.call_args.args[1] == 1 assert mock_inject.call_args.args[2] == [stage_cfg] reg_kwargs = mock_register.call_args.kwargs assert reg_kwargs["omni_master_address"] == "127.0.0.1" assert reg_kwargs["omni_master_port"] == 26000 assert reg_kwargs["omni_stage_id"] == 1 assert reg_kwargs["omni_stage_config"] is stage_cfg assert reg_kwargs["replica_id"] is None assert reg_kwargs["return_full_response"] is True spawn_kwargs = mock_spawn.call_args.kwargs assert spawn_kwargs["handshake_address"] == "tcp://127.0.0.1:26001" assert spawn_kwargs["request_address"] == "tcp://127.0.0.1:26002" assert spawn_kwargs["response_address"] == "tcp://127.0.0.1:26003" assert spawn_kwargs["omni_coordinator_address"] == "tcp://127.0.0.1:26100" assert spawn_kwargs["omni_stage_id"] == 1 assert spawn_kwargs["omni_replica_id"] == 0 mock_handshake.assert_called_once_with(proc, "tcp://127.0.0.1:26001", 600) def test_run_headless_diffusion_raises_on_nonzero_proc_exit(mocker: MockerFixture) -> None: """A diffusion replica that exits with a non-zero code must surface as a RuntimeError from ``run_headless`` (the head needs the signal to roll back its own stage init).""" from vllm_omni.engine.stage_engine_startup import StageRegistrationResponse stage_cfg = _make_stage_cfg(1, stage_type="diffusion") proc = mocker.Mock(sentinel=object(), exitcode=137, name="proc-stage1-rep0") proc.is_alive.return_value = False mocker.patch( "vllm_omni.entrypoints.utils.load_and_resolve_stage_configs", return_value=("/fake/stages.yaml", [stage_cfg]), ) mocker.patch("vllm_omni.engine.stage_init_utils.prepare_engine_environment") mocker.patch("vllm_omni.engine.stage_init_utils.load_omni_transfer_config_for_model", return_value=None) mocker.patch( "vllm_omni.distributed.omni_connectors.utils.initialization.resolve_omni_kv_config_for_stage", return_value=(None, None, None), ) mocker.patch( "vllm_omni.engine.stage_init_utils.extract_stage_metadata", return_value=SimpleNamespace(stage_id=1, stage_type="diffusion"), ) mocker.patch("vllm_omni.engine.stage_init_utils.inject_kv_stage_info") mocker.patch("vllm_omni.engine.stage_init_utils.build_diffusion_config", return_value=mocker.Mock()) mocker.patch( "vllm_omni.engine.stage_engine_startup.register_stage_with_omni_master", return_value=StageRegistrationResponse( handshake_address="tcp://127.0.0.1:26001", input_address="tcp://127.0.0.1:26002", output_address="tcp://127.0.0.1:26003", replica_id=0, coordinator_router_address=None, ), ) mocker.patch( "vllm_omni.diffusion.stage_diffusion_proc.spawn_diffusion_proc", return_value=(proc, None, None, None), ) mocker.patch("vllm_omni.diffusion.stage_diffusion_proc.complete_diffusion_handshake") mocker.patch( "multiprocessing.connection.wait", side_effect=lambda sentinels: [sentinels[0]], ) mocker.patch("vllm_omni.engine.stage_init_utils.terminate_alive_proc") mocker.patch("signal.signal") with pytest.raises(RuntimeError, match=r"exited with code 137"): run_headless(_make_headless_args(stage_id=1))