Method test_inf_signs

Lib/test/test_float.py:1150–1152

(self)

        self.assertEqual(str(-1e300 * 1e300 * 0), "nan")

    def test_inf_signs(self):
        self.assertEqual(copysign(1.0, float('inf')), 1.0)
        self.assertEqual(copysign(1.0, float('-inf')), -1.0)

    def test_nan_signs(self):
        # The sign of float('nan') should be predictable.