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import unittest
from unittest.mock import patch
import os
from ont_fast5_api.compression_settings import register_plugin
class TestCheckCompression(unittest.TestCase):
def test_register_plugin_no_prepend(self):
# GIVEN a version of h5py that has the h5pl module
with patch('h5py.h5pl', create=True) as mock:
# WHEN h5py.h5pl doesn't have the prepend method
del mock.prepend
# and the hdf5 plugin path variable hasn't been set
if 'HDF5_PLUGIN_PATH' in os.environ:
del os.environ['HDF5_PLUGIN_PATH']
self.assertTrue('HDF5_PLUGIN_PATH' not in os.environ)
# THEN when we try and register the vbz plugin we fall back to setting
# HDF5_PLUGIN_PATH (because we can't use prepend)
plugin_path = register_plugin()
self.assertTrue(os.environ['HDF5_PLUGIN_PATH'] == plugin_path)
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