def rt(dts):
"""Do simple round-trip."""
return datetime_to_str(str_to_datetime(dts))
def test01_datetime_to_str(self):
"""Writing."""
self.assertEqual(datetime_to_str(0), "1970-01-01T00:00:00Z")
self.assertEqual(datetime_to_str(0.000001),
"1970-01-01T00:00:00.000001Z")
self.assertEqual(datetime_to_str(0.1), "1970-01-01T00:00:00.100000Z")
self.assertEqual(datetime_to_str(1), "1970-01-01T00:00:01Z")
self.assertEqual(datetime_to_str(60), "1970-01-01T00:01:00Z")
self.assertEqual(datetime_to_str(60 * 60), "1970-01-01T01:00:00Z")
self.assertEqual(datetime_to_str(60 * 60 * 24), "1970-01-02T00:00:00Z")
self.assertEqual(datetime_to_str(60 * 60 * 24 * 31),
"1970-02-01T00:00:00Z")
self.assertEqual(datetime_to_str(60 * 60 * 24 * 365),
"1971-01-01T00:00:00Z")
# Random other datetime
self.assertEqual(datetime_to_str(1234567890), "2009-02-13T23:31:30Z")
# Rounding issues
self.assertEqual(datetime_to_str(0.199999),
"1970-01-01T00:00:00.199999Z")
self.assertEqual(datetime_to_str(0.1999991),
"1970-01-01T00:00:00.199999Z")
self.assertEqual(datetime_to_str(0.1999999),
"1970-01-01T00:00:00.200000Z")
self.assertEqual(datetime_to_str(0.200000),
"1970-01-01T00:00:00.200000Z")
self.assertEqual(datetime_to_str(0.2000001),
"1970-01-01T00:00:00.200000Z")
self.assertEqual(datetime_to_str(0.2000009),
"1970-01-01T00:00:00.200001Z")
self.assertEqual(datetime_to_str(0.200001),
"1970-01-01T00:00:00.200001Z")
# No fractions
self.assertEqual(datetime_to_str(100, True), "1970-01-01T00:01:40Z")
self.assertEqual(datetime_to_str(0.2000009, True),
"1970-01-01T00:00:00Z")
self.assertEqual(datetime_to_str(0.200001, no_fractions=True),
"1970-01-01T00:00:00Z")
# Special cases
self.assertEqual(datetime_to_str(None), None)
nt = datetime_to_str('now', no_fractions=True)
self.assertTrue(
re.match(r'''\d\d\d\d\-\d\d\-\d\dT\d\d:\d\d:\d\dZ''', nt))