def test_prediction_methods_respect_index(self, data_pred2):
x = data_pred2[['x1', 'x2']].ix[:3].sort_index(ascending=False)
expected_index = pd.Index(np.array([3, 2, 1, 0]))
cph = CoxPHFitter()
cph.fit(data_pred2, duration_col='t', event_col='E')
npt.assert_array_equal(cph.predict_partial_hazard(x).index, expected_index)
npt.assert_array_equal(cph.predict_percentile(x).index, expected_index)
npt.assert_array_equal(cph.predict_expectation(x).index, expected_index)
aaf = AalenAdditiveFitter()
aaf.fit(data_pred2, duration_col='t', event_col='E')
npt.assert_array_equal(aaf.predict_percentile(x).index, expected_index)
npt.assert_array_equal(aaf.predict_expectation(x).index, expected_index)
