dev(narugo): add one more test case

import pytest

from PIL import Image

from hbutils.testing import tmatrix, isolated_directory

from imgutils.metadata import read_geninfo_parameters, read_geninfo_exif, read_geninfo_gif, write_geninfo_parameters, \

    return get_testfile('nai3_clear.png')

@pytest.fixture()

def png_comment_str():

    return get_testfile('nai3_clear_comment_str.png')

@pytest.mark.unittest

class TestMetadataGeninfo:

    def test_read_geninfo_parameters(self, a41_webui_file):

        with isolated_directory():

            write_geninfo_gif(png_rgb_clean, f'image{ext}', geninfo=text)

            assert read_geninfo_gif(f'image{ext}') == (text if text else None)

    def test_read_geninfo_gif_comment_str(self, png_comment_str):

        image = Image.open(png_comment_str)

        assert isinstance(image.info.get('comment'), str)

        assert read_geninfo_gif(png_comment_str) is None

        assert read_geninfo_gif(image) is None