datetimetester.py 文件源码

def test_microsecond_rounding(self):
        for fts in [self.theclass.fromtimestamp,
                    self.theclass.utcfromtimestamp]:
            zero = fts(0)
            self.assertEqual(zero.second, 0)
            self.assertEqual(zero.microsecond, 0)
            try:
                minus_one = fts(-1e-6)
            except OSError:
                # localtime(-1) and gmtime(-1) is not supported on Windows
                pass
            else:
                self.assertEqual(minus_one.second, 59)
                self.assertEqual(minus_one.microsecond, 999999)

                t = fts(-1e-8)
                self.assertEqual(t, minus_one)
                t = fts(-9e-7)
                self.assertEqual(t, minus_one)
                t = fts(-1e-7)
                self.assertEqual(t, minus_one)

            t = fts(1e-7)
            self.assertEqual(t, zero)
            t = fts(9e-7)
            self.assertEqual(t, zero)
            t = fts(0.99999949)
            self.assertEqual(t.second, 0)
            self.assertEqual(t.microsecond, 999999)
            t = fts(0.9999999)
            self.assertEqual(t.second, 0)
            self.assertEqual(t.microsecond, 999999)