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- from __future__ import absolute_import
-
- import pickle
- import sys
-
- from kombu.utils.functional import lazy, maybe_evaluate
-
- from kombu.tests.case import Case, SkipTest
-
-
- def double(x):
- return x * 2
-
-
- class test_lazy(Case):
-
- def test__str__(self):
- self.assertEqual(
- str(lazy(lambda: 'the quick brown fox')),
- 'the quick brown fox',
- )
-
- def test__repr__(self):
- self.assertEqual(
- repr(lazy(lambda: 'fi fa fo')),
- "'fi fa fo'",
- )
-
- def test__cmp__(self):
- if sys.version_info[0] == 3:
- raise SkipTest('irrelevant on py3')
-
- self.assertEqual(lazy(lambda: 10).__cmp__(lazy(lambda: 20)), -1)
- self.assertEqual(lazy(lambda: 10).__cmp__(5), 1)
-
- def test_evaluate(self):
- self.assertEqual(lazy(lambda: 2 + 2)(), 4)
- self.assertEqual(lazy(lambda x: x * 4, 2), 8)
- self.assertEqual(lazy(lambda x: x * 8, 2)(), 16)
-
- def test_cmp(self):
- self.assertEqual(lazy(lambda: 10), lazy(lambda: 10))
- self.assertNotEqual(lazy(lambda: 10), lazy(lambda: 20))
-
- def test__reduce__(self):
- x = lazy(double, 4)
- y = pickle.loads(pickle.dumps(x))
- self.assertEqual(x(), y())
-
- def test__deepcopy__(self):
- from copy import deepcopy
- x = lazy(double, 4)
- y = deepcopy(x)
- self.assertEqual(x._fun, y._fun)
- self.assertEqual(x._args, y._args)
- self.assertEqual(x(), y())
-
-
- class test_maybe_evaluate(Case):
-
- def test_evaluates(self):
- self.assertEqual(maybe_evaluate(lazy(lambda: 10)), 10)
- self.assertEqual(maybe_evaluate(20), 20)
|
