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Issue #26020: Fix evaluation order for set literals

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This commit is contained in:
Raymond Hettinger 2016-09-08 14:40:36 -07:00
parent 5dc504c3c9
commit 262b6793e0
3 changed files with 21 additions and 2 deletions
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15
Lib/test/test_set.py
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@ -388,6 +388,21 @@ class TestSet(TestJointOps, unittest.TestCase):
t = {1,2,3}
self.assertEqual(s, t)
def test_set_literal_insertion_order(self):
# SF Issue #26020 -- Expect left to right insertion
s = {1, 1.0, True}
self.assertEqual(len(s), 1)
stored_value = s.pop()
self.assertEqual(type(stored_value), int)
def test_set_literal_evaluation_order(self):
# Expect left to right expression evaluation
events = []
def record(obj):
events.append(obj)
s = {record(1), record(2), record(3)}
self.assertEqual(events, [1, 2, 3])
def test_hash(self):
self.assertRaises(TypeError, hash, self.s)