def test_all_values_single_bin(self):
        # 2070
        index = period_range(start="2012-01-01", end="2012-12-31", freq="M")
        s = Series(np.random.randn(len(index)), index=index)

        result = s.resample("A", how='mean')
        tm.assert_almost_equal(result[0], s.mean())