tests/collections/tts/models/test_hifigan.py

# Copyright (c) 2023, NVIDIA CORPORATION & AFFILIATES.  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.
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#
#     http://www.apache.org/licenses/LICENSE-2.0
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"""
This file implemented unit tests for loading all pretrained HiFiGAN NGC checkpoints and converting Mel-spectrograms into
audios. In general, each test for a single model is ~3.5 seconds on an NVIDIA RTX A6000.
"""

import pytest

from nemo.collections.tts.models import HifiGanModel

available_models = [model.pretrained_model_name for model in HifiGanModel.list_available_models()]


@pytest.fixture(params=available_models, ids=available_models)
@pytest.mark.run_only_on('GPU')
def pretrained_model(request, get_language_id_from_pretrained_model_name):
    model_name = request.param
    language_id = get_language_id_from_pretrained_model_name(model_name)
    model = HifiGanModel.from_pretrained(model_name=model_name)
    return model, language_id


@pytest.mark.nightly
@pytest.mark.run_only_on('GPU')
def test_inference(pretrained_model, mel_spec_example):
    model, _ = pretrained_model
    _ = model.convert_spectrogram_to_audio(spec=mel_spec_example)