def test_fetch_data_files():
"""Test fetch_data_files()."""
# Remove a single file from the cache
cache = get_data_dir()
path = cache / "693_J2KR.dcm"
if path.exists():
path.unlink()
assert not path.exists()
fetch_data_files()
assert path.exists()
def test_fetch_data_files_download_failure(download_failure):
"""Test fetch_data_files() with download failures."""
msg = r"An error occurred downloading the following files:"
with pytest.raises(RuntimeError, match=msg):
fetch_data_files()