def test_round_tzaware(self):
dt = Timestamp("20130101 09:10:11", tz="US/Eastern")
result = dt.round("D")
expected = Timestamp("20130101", tz="US/Eastern")
assert result == expected
dt = Timestamp("20130101 09:10:11", tz="US/Eastern")
result = dt.round("s")
assert result == dt
def test_round_subsecond(self):
# GH#14440 & GH#15578
result = Timestamp("2016-10-17 12:00:00.0015").round("ms")
expected = Timestamp("2016-10-17 12:00:00.002000")
assert result == expected
result = Timestamp("2016-10-17 12:00:00.00149").round("ms")
expected = Timestamp("2016-10-17 12:00:00.001000")
assert result == expected
ts = Timestamp("2016-10-17 12:00:00.0015")
for freq in ["us", "ns"]:
assert ts == ts.round(freq)
result = Timestamp("2016-10-17 12:00:00.001501031").round("10ns")
expected = Timestamp("2016-10-17 12:00:00.001501030")
assert result == expected
def test_round_int64(self, timestamp, freq):
# check that all rounding modes are accurate to int64 precision
# see GH#22591
dt = Timestamp(timestamp)
unit = to_offset(freq).nanos
# test floor
result = dt.floor(freq)
assert result.value % unit == 0, f"floor not a {freq} multiple"
assert 0 <= dt.value - result.value < unit, "floor error"
# test ceil
result = dt.ceil(freq)
assert result.value % unit == 0, f"ceil not a {freq} multiple"
assert 0 <= result.value - dt.value < unit, "ceil error"
# test round
result = dt.round(freq)
assert result.value % unit == 0, f"round not a {freq} multiple"
assert abs(result.value - dt.value) <= unit // 2, "round error"
if unit % 2 == 0 and abs(result.value - dt.value) == unit // 2:
# round half to even
assert result.value // unit % 2 == 0, "round half to even error"
def test_round_invalid_arg(self):
stamp = Timestamp("2000-01-05 05:09:15.13")
with pytest.raises(ValueError, match=INVALID_FREQ_ERR_MSG):
stamp.round("foo")
def test_round_30min(self):
# round
dt = Timestamp("20130104 12:32:00")
result = dt.round("30Min")
expected = Timestamp("20130104 12:30:00")
assert result == expected
def test_round_frequencies(self, timestamp, freq, expected):
dt = Timestamp(timestamp)
result = dt.round(freq)
expected = Timestamp(expected)
assert result == expected
