diff options
Diffstat (limited to 'Lib/test/test_set.py')
| -rw-r--r-- | Lib/test/test_set.py | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/Lib/test/test_set.py b/Lib/test/test_set.py index ed2db18..f263a7d 100644 --- a/Lib/test/test_set.py +++ b/Lib/test/test_set.py @@ -105,6 +105,12 @@ class TestJointOps(unittest.TestCase): self.assertEqual(self.thetype('abcba').intersection(C('ccb')), set('bc')) self.assertEqual(self.thetype('abcba').intersection(C('ef')), set('')) self.assertEqual(self.thetype('abcba').intersection(C('cbcf'), C('bag')), set('b')) + s = self.thetype('abcba') + z = s.intersection() + if self.thetype == frozenset(): + self.assertEqual(id(s), id(z)) + else: + self.assertNotEqual(id(s), id(z)) def test_isdisjoint(self): def f(s1, s2): @@ -144,6 +150,8 @@ class TestJointOps(unittest.TestCase): self.assertEqual(self.thetype('abcba').difference(C('efgfe')), set('abc')) self.assertEqual(self.thetype('abcba').difference(C('ccb')), set('a')) self.assertEqual(self.thetype('abcba').difference(C('ef')), set('abc')) + self.assertEqual(self.thetype('abcba').difference(), set('abc')) + self.assertEqual(self.thetype('abcba').difference(C('a'), C('b')), set('c')) def test_sub(self): i = self.s.difference(self.otherword) @@ -470,6 +478,18 @@ class TestSet(TestJointOps): self.assertEqual(s.difference_update(C(p)), None) self.assertEqual(s, set(q)) + s = self.thetype('abcdefghih') + s.difference_update() + self.assertEqual(s, self.thetype('abcdefghih')) + + s = self.thetype('abcdefghih') + s.difference_update(C('aba')) + self.assertEqual(s, self.thetype('cdefghih')) + + s = self.thetype('abcdefghih') + s.difference_update(C('cdc'), C('aba')) + self.assertEqual(s, self.thetype('efghih')) + def test_isub(self): self.s -= set(self.otherword) for c in (self.word + self.otherword): |