Method test_sum_stability

numpy/_core/tests/test_ufunc.py:728–733

(self)

        assert_(res.dtype.name == 'float64')

    def test_sum_stability(self):
        a = np.ones(500, dtype=np.float32)
        assert_almost_equal((a / 10.).sum() - a.size / 10., 0, 4)

        a = np.ones(500, dtype=np.float64)
        assert_almost_equal((a / 10.).sum() - a.size / 10., 0, 13)

    @pytest.mark.skipif(IS_WASM, reason="fp errors don't work in wasm")
    def test_sum(self):