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import unittest
from test import test_support, seq_tests
class TupleTest(seq_tests.CommonTest):
type2test = tuple
def test_constructors(self):
super(TupleTest, self).test_len()
# calling built-in types without argument must return empty
self.assertEqual(tuple(), ())
def test_truth(self):
super(TupleTest, self).test_truth()
self.assert_(not ())
self.assert_((42, ))
def test_len(self):
super(TupleTest, self).test_len()
self.assertEqual(len(()), 0)
self.assertEqual(len((0,)), 1)
self.assertEqual(len((0, 1, 2)), 3)
def test_iadd(self):
super(TupleTest, self).test_iadd()
u = (0, 1)
u2 = u
u += (2, 3)
self.assert_(u is not u2)
def test_imul(self):
super(TupleTest, self).test_imul()
u = (0, 1)
u2 = u
u *= 3
self.assert_(u is not u2)
def test_tupleresizebug(self):
# Check that a specific bug in _PyTuple_Resize() is squashed.
def f():
for i in range(1000):
yield i
self.assertEqual(list(tuple(f())), range(1000))
def test_main():
test_support.run_unittest(TupleTest)
if __name__=="__main__":
test_main()
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