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from __future__ import unicode_literals
import unittest
import warnings
from fs.base import _new_name
class TestNewNameDecorator(unittest.TestCase):
def double(self, n):
"Double a number"
return n * 2
times_2 = _new_name(double, "times_2")
def test_old_name(self):
"""Test _new_name method issues a warning"""
with warnings.catch_warnings(record=True) as w:
warnings.simplefilter("always")
result = self.times_2(2)
self.assertEqual(len(w), 1)
self.assertEqual(w[0].category, DeprecationWarning)
self.assertEqual(
str(w[0].message),
"method 'times_2' has been deprecated, please rename to 'double'",
)
self.assertEqual(result, 4)
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