[Diffusion] DreamZero world model integration with CFG parallel + OpenPI serving (#2162)

Signed-off-by: Meng <meng_chen99@163.com>
Signed-off-by: Yangshen Deng <yangshen.d@outlook.com>
Signed-off-by: Suli Wang <50828270+wsl2000@users.noreply.github.com>
Co-authored-by: Meng <meng_chen99@163.com>
Co-authored-by: Suli Wang <50828270+wsl2000@users.noreply.github.com>
Co-authored-by: amy-why-3459 <wuhaiyan17@huawei.com>

tests/dreamzero/test_dreamzero_utils.py

@@ -0,0 +1,24 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+
+import pytest
+
+from vllm_omni.diffusion.models.dreamzero.utils import (
+    DEFAULT_CFG_SCALE,
+    DEFAULT_EMBODIMENT_NAME_TO_ID,
+    DEFAULT_NEGATIVE_PROMPT,
+    DEFAULT_NUM_INFERENCE_STEPS,
+    DEFAULT_SEED,
+    DEFAULT_SIGMA_SHIFT,
+)
+
+pytestmark = [pytest.mark.core_model, pytest.mark.cpu]
+
+
+def test_dreamzero_default_constants_match_source_baseline():
+    assert DEFAULT_NUM_INFERENCE_STEPS == 16
+    assert DEFAULT_CFG_SCALE == 5.0
+    assert DEFAULT_SIGMA_SHIFT == 5.0
+    assert DEFAULT_SEED == 1140
+    assert "worst quality" in DEFAULT_NEGATIVE_PROMPT
+    assert DEFAULT_EMBODIMENT_NAME_TO_ID["oxe_droid"] == 17