| # -*- coding: utf-8 -*- |
| # pylint: disable=E1101 |
| |
| import unittest |
| |
| from ..utils import get_arg, inject_args |
| |
| |
| class TestUtils(unittest.TestCase): |
| def test_inject_args_curries_arguments(self): |
| fn = inject_args(lambda a=None, b=None: a+b, a=3, b=5) |
| self.assertEqual(fn(), 8) |
| |
| def test_inject_args_doesnt_add_arg_if_not_needed(self): |
| fn = inject_args(lambda: 7, a=1, b=2) |
| self.assertEqual(fn(), 7) |
| fn = inject_args(lambda a=None: a, b=2) |
| self.assertEqual(fn(1), 1) |
| |
| def test_inject_args_knows_how_to_handle_arg_order(self): |
| fn = inject_args(lambda a=None, b=None: b - a, a=3) |
| self.assertEqual(fn(b=4), 1) |
| fn = inject_args(lambda b=None, a=None: b - a, a=3) |
| self.assertEqual(fn(b=4), 1) |
| |
| def test_inject_args_works_as_decorator(self): |
| fn = inject_args(x=1)(lambda x=None: x) |
| self.assertEqual(fn(), 1) |
| |
| def test_get_arg__positional(self): |
| def _fn(x, y, z): |
| return x + y + z |
| |
| x = get_arg('x', _fn, (1, 3, 4), {}) |
| self.assertEqual(x, 1) |
| y = get_arg('y', _fn, (1, 3, 4), {}) |
| self.assertEqual(y, 3) |
| z = get_arg('z', _fn, (1, 3, 4), {}) |
| self.assertEqual(z, 4) |
| |
| def test_get_arg__keyword(self): |
| def _fn(x, y, z=5): |
| return x + y + z |
| |
| z = get_arg('z', _fn, (1, 2), {'z': 3}) |
| self.assertEqual(z, 3) |
| |
| |
| if __name__ == '__main__': |
| unittest.main() |