def test_compress_invalid_fields():
"""Verify compress raises an error on an invalid date."""
day = 30
month = 2
year = 2021
field = DateInputField()
with pytest.raises(ValidationError) as err:
field.compress([day, month, year])
assert err.value.args[0] == "day is out of range for month"
def test_compress_optional_fields_empty():
"""Verify compress returns None if the values are not required and not set."""
field = DateInputField()
field.require_all_fields = False
value = field.compress(["", "", ""])
assert value is None
def test_compress_valid_fields():
"""Verify compress returns a date."""
date = datetime.date(year=2007, month=12, day=11)
field = DateInputField()
value = field.compress([date.day, date.month, date.year])
assert value == date