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test_comparisons.py
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# -*- coding: utf-8 -*-
import sys
from datetime import datetime
import operator
import pytest
import numpy as np
from dateutil.tz import tzutc
from pytz import utc
from pandas.compat import long
from pandas import Timestamp
class TestTimestampComparison(object):
def test_comparison_object_array(self):
# GH#15183
ts = Timestamp('2011-01-03 00:00:00-0500', tz='US/Eastern')
other = Timestamp('2011-01-01 00:00:00-0500', tz='US/Eastern')
naive = Timestamp('2011-01-01 00:00:00')
arr = np.array([other, ts], dtype=object)
res = arr == ts
expected = np.array([False, True], dtype=bool)
assert (res == expected).all()
# 2D case
arr = np.array([[other, ts],
[ts, other]],
dtype=object)
res = arr != ts
expected = np.array([[True, False], [False, True]], dtype=bool)
assert res.shape == expected.shape
assert (res == expected).all()
# tzaware mismatch
arr = np.array([naive], dtype=object)
with pytest.raises(TypeError):
arr < ts
def test_comparison(self):
# 5-18-2012 00:00:00.000
stamp = long(1337299200000000000)
val = Timestamp(stamp)
assert val == val
assert not val != val
assert not val < val
assert val <= val
assert not val > val
assert val >= val
other = datetime(2012, 5, 18)
assert val == other
assert not val != other
assert not val < other
assert val <= other
assert not val > other
assert val >= other
other = Timestamp(stamp + 100)
assert val != other
assert val != other
assert val < other
assert val <= other
assert other > val
assert other >= val
def test_compare_invalid(self):
# GH 8058
val = Timestamp('20130101 12:01:02')
assert not val == 'foo'
assert not val == 10.0
assert not val == 1
assert not val == long(1)
assert not val == []
assert not val == {'foo': 1}
assert not val == np.float64(1)
assert not val == np.int64(1)
assert val != 'foo'
assert val != 10.0
assert val != 1
assert val != long(1)
assert val != []
assert val != {'foo': 1}
assert val != np.float64(1)
assert val != np.int64(1)
def test_cant_compare_tz_naive_w_aware(self):
# see gh-1404
a = Timestamp('3/12/2012')
b = Timestamp('3/12/2012', tz='utc')
pytest.raises(Exception, a.__eq__, b)
pytest.raises(Exception, a.__ne__, b)
pytest.raises(Exception, a.__lt__, b)
pytest.raises(Exception, a.__gt__, b)
pytest.raises(Exception, b.__eq__, a)
pytest.raises(Exception, b.__ne__, a)
pytest.raises(Exception, b.__lt__, a)
pytest.raises(Exception, b.__gt__, a)
if sys.version_info < (3, 3):
pytest.raises(Exception, a.__eq__, b.to_pydatetime())
pytest.raises(Exception, a.to_pydatetime().__eq__, b)
else:
assert not a == b.to_pydatetime()
assert not a.to_pydatetime() == b
def test_cant_compare_tz_naive_w_aware_explicit_pytz(self):
# see gh-1404
a = Timestamp('3/12/2012')
b = Timestamp('3/12/2012', tz=utc)
pytest.raises(Exception, a.__eq__, b)
pytest.raises(Exception, a.__ne__, b)
pytest.raises(Exception, a.__lt__, b)
pytest.raises(Exception, a.__gt__, b)
pytest.raises(Exception, b.__eq__, a)
pytest.raises(Exception, b.__ne__, a)
pytest.raises(Exception, b.__lt__, a)
pytest.raises(Exception, b.__gt__, a)
if sys.version_info < (3, 3):
pytest.raises(Exception, a.__eq__, b.to_pydatetime())
pytest.raises(Exception, a.to_pydatetime().__eq__, b)
else:
assert not a == b.to_pydatetime()
assert not a.to_pydatetime() == b
def test_cant_compare_tz_naive_w_aware_dateutil(self):
# see gh-1404
a = Timestamp('3/12/2012')
b = Timestamp('3/12/2012', tz=tzutc())
pytest.raises(Exception, a.__eq__, b)
pytest.raises(Exception, a.__ne__, b)
pytest.raises(Exception, a.__lt__, b)
pytest.raises(Exception, a.__gt__, b)
pytest.raises(Exception, b.__eq__, a)
pytest.raises(Exception, b.__ne__, a)
pytest.raises(Exception, b.__lt__, a)
pytest.raises(Exception, b.__gt__, a)
if sys.version_info < (3, 3):
pytest.raises(Exception, a.__eq__, b.to_pydatetime())
pytest.raises(Exception, a.to_pydatetime().__eq__, b)
else:
assert not a == b.to_pydatetime()
assert not a.to_pydatetime() == b
def test_timestamp_compare_scalars(self):
# case where ndim == 0
lhs = np.datetime64(datetime(2013, 12, 6))
rhs = Timestamp('now')
nat = Timestamp('nat')
ops = {'gt': 'lt',
'lt': 'gt',
'ge': 'le',
'le': 'ge',
'eq': 'eq',
'ne': 'ne'}
for left, right in ops.items():
left_f = getattr(operator, left)
right_f = getattr(operator, right)
expected = left_f(lhs, rhs)
result = right_f(rhs, lhs)
assert result == expected
expected = left_f(rhs, nat)
result = right_f(nat, rhs)
assert result == expected
def test_timestamp_compare_with_early_datetime(self):
# e.g. datetime.min
stamp = Timestamp('2012-01-01')
assert not stamp == datetime.min
assert not stamp == datetime(1600, 1, 1)
assert not stamp == datetime(2700, 1, 1)
assert stamp != datetime.min
assert stamp != datetime(1600, 1, 1)
assert stamp != datetime(2700, 1, 1)
assert stamp > datetime(1600, 1, 1)
assert stamp >= datetime(1600, 1, 1)
assert stamp < datetime(2700, 1, 1)
assert stamp <= datetime(2700, 1, 1)