tests/python/unittest/test_engine_import.py

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import os
from mxnet.test_utils import environment
import pytest

try:
    reload         # Python 2
except NameError:  # Python 3
    from importlib import reload


@pytest.mark.skip(reason='test needs improving, current use of reload(mxnet) is ineffective')
def test_engine_import():
    import mxnet
    # Temporarily add an illegal entry (that is not caught) to show how the test needs improving
    engine_types = [None, 'NaiveEngine', 'ThreadedEngine', 'ThreadedEnginePerDevice', 'BogusEngine']

    for type in engine_types:
        with environment('MXNET_ENGINE_TYPE', type):
            reload(mxnet)