def METHOD_NAME(self):
    assert utils.load_json_file('some_file') is None
    mock_os_open = mock.mock_open(read_data='')
    with mock.patch('sonic_platform.utils.open', mock_os_open):
        assert utils.load_json_file('some_file') is None
    mock_os_open = mock.mock_open(read_data='{"a": "b"}')
    with mock.patch('sonic_platform.utils.open', mock_os_open):
        data = utils.load_json_file('some_file')
        assert data['a'] == 'b'