def test_init(self):
        self.assertEqual(MetricsQuery('bibcode').bibcodes, ['bibcode'])
        self.assertEqual(MetricsQuery(['b1', 'b2']).bibcodes, ['b1', 'b2'])
an initialized MetricsQuery object should have a bibcode attributes
dataset/ETHPy150Open andycasey/ads/ads/tests/test_metrics.py/TestMetricsQuery.test_init