Method test_sumprod_accuracy

Lib/test/test_math.py:1395–1400

(self)

                         "sumprod() accuracy not guaranteed on machines with double rounding")
    @support.cpython_only    # Other implementations may choose a different algorithm
    def test_sumprod_accuracy(self):
        sumprod = math.sumprod
        self.assertEqual(sumprod([0.1] * 10, [1]*10), 1.0)
        self.assertEqual(sumprod([0.1] * 20, [True, False] * 10), 1.0)
        self.assertEqual(sumprod([True, False] * 10, [0.1] * 20), 1.0)
        self.assertEqual(sumprod([1.0, 10E100, 1.0, -10E100], [1.0]*4), 2.0)

    @support.requires_resource('cpu')
    def test_sumprod_stress(self):