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vllm-omni/tests/examples/offline_inference/test_image_task_prompts.py
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# SPDX-License-Identifier: Apache-2.0
# SPDX-FileCopyrightText: Copyright contributors to the vLLM-Omni project
from __future__ import annotations
import functools
import importlib.util
import pytest
from PIL import Image
from tests.examples.helpers import EXAMPLES
pytestmark = [pytest.mark.core_model, pytest.mark.cpu]
@functools.cache
def _load_example_module(relative_path: str, module_name: str):
path = EXAMPLES / relative_path
spec = importlib.util.spec_from_file_location(module_name, path)
assert spec is not None and spec.loader is not None
module = importlib.util.module_from_spec(spec)
spec.loader.exec_module(module)
return module
@pytest.mark.parametrize(
("negative_prompt", "expected_negative_prompt"),
[(None, None), ("", ""), ("blurry", "blurry")],
)
def test_text_to_image_builds_canonical_prompt(
negative_prompt: str | None,
expected_negative_prompt: str | None,
) -> None:
mod = _load_example_module(
"offline_inference/text_to_image/text_to_image.py",
"text_to_image_example",
)
result = mod.build_text_to_image_prompt("a red fox", negative_prompt)
assert result["prompt"] == "a red fox"
assert result["modalities"] == ["image"]
if expected_negative_prompt is None:
assert "negative_prompt" not in result
else:
assert result["negative_prompt"] == expected_negative_prompt
def test_image_to_video_builds_canonical_prompt() -> None:
mod = _load_example_module(
"offline_inference/image_to_video/image_to_video.py",
"image_to_video_example",
)
image = Image.new("RGB", (32, 16), "red")
result = mod.build_image_to_video_prompt(
prompt="the fox turns toward the camera",
negative_prompt="flicker",
media_inputs={"image": image},
)
assert result == {
"prompt": "the fox turns toward the camera",
"modalities": ["video"],
"multi_modal_data": {"image": image},
"negative_prompt": "flicker",
}
@pytest.mark.parametrize(
("relative_path", "module_name"),
[
("offline_inference/text_to_video/text_to_video.py", "text_to_video_output_example"),
("offline_inference/image_to_video/image_to_video.py", "image_to_video_output_example"),
],
)
@pytest.mark.parametrize("output_type", ["video", "image"])
def test_video_examples_accept_semantic_and_legacy_output_types(
relative_path: str,
module_name: str,
output_type: str,
) -> None:
mod = _load_example_module(relative_path, module_name)
mod._validate_video_output_type(output_type)
@pytest.mark.parametrize(
("relative_path", "module_name"),
[
("offline_inference/text_to_video/text_to_video.py", "text_to_video_invalid_output_example"),
("offline_inference/image_to_video/image_to_video.py", "image_to_video_invalid_output_example"),
],
)
def test_video_examples_reject_unrelated_output_types(
relative_path: str,
module_name: str,
) -> None:
mod = _load_example_module(relative_path, module_name)
with pytest.raises(ValueError, match="Unexpected output type 'audio'"):
mod._validate_video_output_type("audio")