nvidia-nemo--speech/tests/collections/speechlm2/test_hf_hub.py

# Copyright (c) 2026, NVIDIA CORPORATION.  All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from nemo.collections.speechlm2.parts.hf_hub import _inject_local_artifact_paths


def _cached_file_kwargs():
    return {
        "cache_dir": None,
        "force_download": False,
        "local_files_only": True,
        "token": None,
        "revision": None,
        "_raise_exceptions_for_gated_repo": False,
        "_raise_exceptions_for_missing_entries": False,
        "_raise_exceptions_for_connection_errors": False,
    }


def _write_local_export_artifacts(tmp_path):
    (tmp_path / "tokenizer_config.json").write_text("{}")
    (tmp_path / "llm_backbone").mkdir()
    (tmp_path / "llm_backbone" / "config.json").write_text("{}")


def test_inject_local_artifact_paths_salm_config(tmp_path):
    _write_local_export_artifacts(tmp_path)
    cfg = {
        "pretrained_llm": "remote-llm",
        "pretrained_asr": "remote-asr",
    }

    _inject_local_artifact_paths(cfg, str(tmp_path), _cached_file_kwargs())

    assert cfg["pretrained_llm"] == str(tmp_path / "llm_backbone")
    assert cfg["pretrained_asr"] == "remote-asr"
    assert cfg["tokenizer_path"] == str(tmp_path)


def test_inject_local_artifact_paths_duplex_eartts_config(tmp_path):
    _write_local_export_artifacts(tmp_path)
    cfg = {
        "pretrained_lm_name": "remote-llm",
        "tts_config": {},
    }

    _inject_local_artifact_paths(cfg, str(tmp_path), _cached_file_kwargs())

    assert cfg["pretrained_lm_name"] == str(tmp_path / "llm_backbone")
    assert cfg["tokenizer_path"] == str(tmp_path)


def test_inject_local_artifact_paths_no_artifacts_keeps_old_config(tmp_path):
    cfg = {
        "pretrained_llm": "remote-llm",
        "pretrained_weights": True,
    }

    _inject_local_artifact_paths(cfg, str(tmp_path), _cached_file_kwargs())

    assert cfg == {
        "pretrained_llm": "remote-llm",
        "pretrained_weights": True,
    }