[CI] Add pytest markers to current tests and update the doc. (#577)

Signed-off-by: Alicia <115451386+congw729@users.noreply.github.com>
Co-authored-by: Hongsheng Liu <liuhongsheng4@huawei.com>

tests/diffusion/cache/test_cache_backends.py

@@ -22,6 +22,8 @@ from vllm_omni.diffusion.cache.selector import get_cache_backend
 from vllm_omni.diffusion.cache.teacache.backend import TeaCacheBackend
 from vllm_omni.diffusion.data import DiffusionCacheConfig
 
+pytestmark = [pytest.mark.core_model, pytest.mark.cpu]
+
 
 class TestCacheDiTBackend:
     """Test CacheDiTBackend implementation."""

tests/diffusion/lora/test_base_linear.py

@@ -5,10 +5,13 @@ from __future__ import annotations
 
 from dataclasses import dataclass
 
+import pytest
 import torch
 
 from vllm_omni.diffusion.lora.layers.base_linear import DiffusionBaseLinearLayerWithLoRA
 
+pytestmark = [pytest.mark.core_model, pytest.mark.cpu]
+
 
 @dataclass
 class _DummyLoRAConfig:

tests/diffusion/lora/test_lora_manager.py

@@ -3,6 +3,7 @@
 
 from __future__ import annotations
 
+import pytest
 import torch
 from vllm.lora.lora_weights import LoRALayerWeights
 from vllm.lora.utils import get_supported_lora_modules
@@ -11,6 +12,8 @@ from vllm.model_executor.layers.linear import LinearBase
 from vllm_omni.diffusion.lora.manager import DiffusionLoRAManager
 from vllm_omni.lora.request import LoRARequest
 
+pytestmark = [pytest.mark.core_model, pytest.mark.cpu]
+
 
 class _DummyLoRALayer:
     def __init__(self, n_slices: int, output_slices: tuple[int, ...]):

tests/diffusion/test_diffusion_worker.py

@@ -17,6 +17,8 @@ import torch
 
 from vllm_omni.diffusion.worker.diffusion_worker import DiffusionWorker
 
+pytestmark = [pytest.mark.core_model, pytest.mark.diffusion, pytest.mark.cpu]
+
 
 @pytest.fixture
 def mock_od_config():