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132dce2246
Use != instead of <> since <> is documented as "obsolescent". Use "is" and "is not" when comparing with None or type objects.
144 lines
2.4 KiB
Python
144 lines
2.4 KiB
Python
from test_support import *
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t = (1, 2, 3)
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l = [4, 5, 6]
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class Seq:
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def __getitem__(self, i):
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if i >= 0 and i < 3: return i
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raise IndexError
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a = -1
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b = -1
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c = -1
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# unpack tuple
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if verbose:
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print 'unpack tuple'
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a, b, c = t
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if a != 1 or b != 2 or c != 3:
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raise TestFailed
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# unpack list
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if verbose:
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print 'unpack list'
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a, b, c = l
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if a != 4 or b != 5 or c != 6:
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raise TestFailed
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# unpack implied tuple
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if verbose:
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print 'unpack implied tuple'
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a, b, c = 7, 8, 9
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if a != 7 or b != 8 or c != 9:
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raise TestFailed
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# unpack string... fun!
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if verbose:
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print 'unpack string'
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a, b, c = 'one'
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if a != 'o' or b != 'n' or c != 'e':
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raise TestFailed
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# unpack generic sequence
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if verbose:
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print 'unpack sequence'
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a, b, c = Seq()
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if a != 0 or b != 1 or c != 2:
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raise TestFailed
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# single element unpacking, with extra syntax
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if verbose:
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print 'unpack single tuple/list'
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st = (99,)
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sl = [100]
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a, = st
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if a != 99:
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raise TestFailed
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b, = sl
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if b != 100:
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raise TestFailed
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# now for some failures
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# unpacking non-sequence
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if verbose:
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print 'unpack non-sequence'
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try:
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a, b, c = 7
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raise TestFailed
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except TypeError:
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pass
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# unpacking tuple of wrong size
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if verbose:
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print 'unpack tuple wrong size'
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try:
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a, b = t
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raise TestFailed
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except ValueError:
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pass
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# unpacking list of wrong size
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if verbose:
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print 'unpack list wrong size'
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try:
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a, b = l
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raise TestFailed
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except ValueError:
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pass
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# unpacking sequence too short
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if verbose:
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print 'unpack sequence too short'
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try:
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a, b, c, d = Seq()
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raise TestFailed
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except ValueError:
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pass
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# unpacking sequence too long
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if verbose:
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print 'unpack sequence too long'
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try:
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a, b = Seq()
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raise TestFailed
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except ValueError:
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pass
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# unpacking a sequence where the test for too long raises a different
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# kind of error
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class BozoError(Exception):
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pass
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class BadSeq:
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def __getitem__(self, i):
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if i >= 0 and i < 3:
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return i
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elif i == 3:
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raise BozoError
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else:
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raise IndexError
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# trigger code while not expecting an IndexError
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if verbose:
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print 'unpack sequence too long, wrong error'
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try:
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a, b, c, d, e = BadSeq()
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raise TestFailed
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except BozoError:
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pass
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# trigger code while expecting an IndexError
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if verbose:
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print 'unpack sequence too short, wrong error'
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try:
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a, b, c = BadSeq()
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raise TestFailed
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except BozoError:
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pass
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