from django.db.backends.sqlite3._functions import (
    _sqlite_date_trunc, _sqlite_datetime_trunc, _sqlite_time_trunc,
)
from django.test import SimpleTestCase


class FunctionTests(SimpleTestCase):
    def test_sqlite_date_trunc(self):
        msg = "Unsupported lookup type: 'unknown-lookup'"
        with self.assertRaisesMessage(ValueError, msg):
            _sqlite_date_trunc('unknown-lookup', '2005-08-11', None, None)

    def test_sqlite_datetime_trunc(self):
        msg = "Unsupported lookup type: 'unknown-lookup'"
        with self.assertRaisesMessage(ValueError, msg):
            _sqlite_datetime_trunc('unknown-lookup', '2005-08-11 1:00:00', None, None)

    def test_sqlite_time_trunc(self):
        msg = "Unsupported lookup type: 'unknown-lookup'"
        with self.assertRaisesMessage(ValueError, msg):
            _sqlite_time_trunc('unknown-lookup', '2005-08-11 1:00:00', None, None)