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from __future__ import annotations
from datetime import timedelta
import pytest
import pendulum
from tests.conftest import assert_date
def test_add_years_positive():
assert pendulum.date(1975, 1, 1).add(years=1).year == 1976
def test_add_years_zero():
assert pendulum.date(1975, 1, 1).add(years=0).year == 1975
def test_add_years_negative():
assert pendulum.date(1975, 1, 1).add(years=-1).year == 1974
def test_add_months_positive():
assert pendulum.date(1975, 12, 1).add(months=1).month == 1
def test_add_months_zero():
assert pendulum.date(1975, 12, 1).add(months=0).month == 12
def test_add_months_negative():
assert pendulum.date(1975, 12, 1).add(months=-1).month == 11
def test_add_month_with_overflow():
assert pendulum.Date(2012, 1, 31).add(months=1).month == 2
def test_add_days_positive():
assert pendulum.Date(1975, 5, 31).add(days=1).day == 1
def test_add_days_zero():
assert pendulum.Date(1975, 5, 31).add(days=0).day == 31
def test_add_days_negative():
assert pendulum.Date(1975, 5, 31).add(days=-1).day == 30
def test_add_weeks_positive():
assert pendulum.Date(1975, 5, 21).add(weeks=1).day == 28
def test_add_weeks_zero():
assert pendulum.Date(1975, 5, 21).add(weeks=0).day == 21
def test_add_weeks_negative():
assert pendulum.Date(1975, 5, 21).add(weeks=-1).day == 14
def test_add_timedelta():
delta = timedelta(days=18)
d = pendulum.date(2015, 3, 14)
new = d + delta
assert isinstance(new, pendulum.Date)
assert_date(new, 2015, 4, 1)
def test_add_duration():
duration = pendulum.duration(years=2, months=3, days=18)
d = pendulum.Date(2015, 3, 14)
new = d + duration
assert_date(new, 2017, 7, 2)
def test_addition_invalid_type():
d = pendulum.date(2015, 3, 14)
with pytest.raises(TypeError):
d + 3
with pytest.raises(TypeError):
3 + d
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