This might be a good place for a test like:
```
expected = Series([3, 0], index=Float64Index([5.0, 0.0]))
for fancy_idx in [[5.0, 0.0], [5, 0], np.array([5.0, 0.0]), np.array([5, 0])]:
    assert_series_equal(s[fancy_idx], expected)
    assert_series_equal(s.loc[fancy_idx], expected)
    assert_series_equal(s.ix[fancy_idx], expected)
```